CA1075756A - Programmable controller for controlling reproduction machines - Google Patents

Abstract

ABSTRACT OF THE DISCLOSURE
A programmable controller is used to control the operation of a xerographic reproducing machine adapted to run in a simplex or duplex mode whereby copies are made on either or both sides of web material fed in a single pass and then cut into individual copy sheets.

Description

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This invention relates to reproducing machines in general and, in particular, to a computer controlled repro-ducing machine and an improved apparatus for and method of controlling and operating reproducing machines.
As the public has become accustomed to the conve-nience and economy of xerographic machines designed to make copies on ordinary plain paper, they are increasingly demand-ing more economical, high speed, reliable and inexpensive reproducing machines of flexible and versatile nature with diverse optional and add-on features. In response, many breakthroughs and significant enhancements have been made to machine to the point where in the span of about a dozen years or so, the machine speeds have increased dramatically.
One of the areas where major efforts have been directed for improvement has been control aspect of the machine and significant advances have been made in this area in recent years in the form of hardwired control logic that give the machine added versatility and reliability. While the hardwired logic has provided significant advances to the overall enhancement of the machine, it has been shown to have its inherent limitations. Thus, for example, the functions provided by the hardwired logic is generally wired into the logic circuitry and frozen. Consequently, when a - new function has to be added to existing functions have to ; be modified, the logic must be redesigned and rewired. But the time, efforts and cost involved in modifying existing logic, or designing a new hardwired logic control for machines of new configuration, or of old configuration with new add-on or optical features, have been found rather significant and burden,ome.

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~0'7S7~ti Additionally, the increased complexity of the modern high speed copier/duplicator has resulted in a tremendous increase in control circuitry, which today is normally carried on circuit boards and through individual wiring. This increase in control circuitry has at this same time created a tremendous space problem, namely where to put it and still retain a reasonable machine size In addition, subsequent changes, alterations, additions, and the like often bring with them increased amounts of circuit boards and wires which may tax to the limit the available space.
While developments in the art of circuit controller fabrication offer promise in alleviating the problems alluded to above, such developments have not heretofore appeared useful for the electrostatic copier/
reproduction machines as we know them today. Recent advances in circuit fabrication techniques, i. e. L. S.
I. chips, are of some help in reducing wiring bulk but do not themselves alleviate the necessity of rewiring in the event of design changes. As for controllers one may consider the control of an asynchronous printer operated through a data processing system. However, typically, electrostatic type copiers and reproduction machines are synchronous by nature and not asynchronous, or readily converted to asynchronous operation. This in part is due to the fact that most copiers employ a continuous photosensitive member or support therefor, and are hence alien to the use of individual photosensitive plates ~
which appear to be required for asynchronous type opera-tion.

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In accordance with another aspect of this invention there is provided a reproduction system for producing copies of an original, comprising: a reproduction machine including a plurality of control devices for implementing the copying process events, means for inputting a reproduction run inst~uc-tion of predetermined characteristics for the reproduction run, a programmable controller having means responsive to the run instruction and means for storing an operating control program ~or operating the machine, said controller being 1~ operable by said operating program to derive timed control signals related to the reproduction run of said predetermined characteristics and applying said control signais to said plurality o~ control devices for implementing the ~opying process steps whereby the machine is enabled to make copies according to the reproduction instruction..

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. ~, The present invention will become clearer from the following detailed description of an illustrative embod-iment of the present invention in conjunction with the accompanying drawings, in which:

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Figure lA shows a schematic front view of an exemplary reproduction machine with a programmable control-ler of the present invention; Figure lB (second sheet of drawings) shows a schematic front view of an exemplary operator control console of the controller;
Figure 2 (third sheet of drawings) is an iso-metric view showing details of the paper path for the reproduction machine in Figure l;
Figure 3 (second sheet of drawings) is an enlarged schematic view of the document input module for the machine shown in Figure l;
Figure 4 (second sheet of drawings) is a view showing the document originals in the form of a plurality of film frames in series, each frame being code marked for identification;
Figure 5 is an enlarged schematic view of the optical paths for the machine shown in Figure l;
Figure 6 is an enlarged isometric view showing details of the developing apparatus for the machine shown in Figure l;
Figure 7 is an enlarged view partially in section showing details of the guillotine assembly for the machine shown in Figure l;
Figure 8 is a schematic block diagram showing the programmable controller of the present invention;
Figure 9 is a schematic diagram of the input/
output interface circuitry between the computer, reproduc-tion machine, and the operator console;
~- Figure 10 is a schematic outline showing the paper path divided into imaginary pitch zones;

10'~5'7~6 Figure 11 is a schematic outline showing the input film module divided into imaginary pitch zonesi Figure 12 is a schematic outline showing the electrostatic path divided into imaginary pitch zonesi Figures 13 and 14 (Fig. 14 is on the eighth sheet of the drawings) are diagrams showing the timing relation-ship of the timed process events and the pitch zones for the paths illustrated in Figures 9, 10 and 11 during process-ing;
Figure 15 is a schematic chart of the program routines of the software for use for the computer to operate the machine shown in Figure l;
Figure 16 is a flow-chart illustrating a general sequence of the operation of the system shown in Figure l;
and Figures 17-28 show in detail the various major component parts and the general sequence of operation shown in Figure 16.
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THE M~CIIIN~
Referring to the drawings in general, and in particular, to Figures lA, 2 and 8, the drawings show an exemplary embodiment of the present invention in the form of a reproduction system having copier/reproduction machir~e, designated generally by the numeral 5 and a programmable controller 200 for operating the machine 5. Hereinafter, the invention will be described in terms of a specific copier/
duplicator machine run by a specific programmable computer, but it is to be understood clearly from the outset that the specific configuration of the machine and computer is for illustrative purposes only and is not intended to limit the spirit and scope of the present invention. The exemplary machine 5 is preferably a xerographic processor and may be a simplex/duplexing machine, that is, one that produces image impressions on either or on both sides of copy material. The reproduction machine 5 includes duplicate processing units 7, 7' as will be described more fully herein.
Tc-l simplify the ensuing description of the reproduction machine 5, the xerographic processing unit 7 is described in detail, with identical areas of processing unit 7' being identified on the drawings by the same numeral followed by a prime mark.

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In the exemplary reproduction machine 5, the original document or documents being reproduced are in the form of a transparent film strip having a plurality of documents, books, each document having any given number of pages or frames 11 arranged in series in a film strip 12 as seen in Fig. 4. As will be described in detail later, the frames 11 are grouped or positioned in series and are suitably coded to identify the starting and endiny frames of each document and each individual frame or page.
The film strip may come in a convenient cassette form.
Film strip 12 is indexed in a timed manner across a copy platen 14, (seen in Fig. 3) under the control of the controller 200. The platen 14 is transparent and is sufficiently large to accommodate two frames at once. Once indexed, the frames may be flash exposed to project optical light images. Dual illumination systems are disposed above platen 14 to illuminate the frames 11 and produce light image rays corresponding to the informational areas on each frame 11 therebelow. The image rays are projected by means of independent optical systems 18, 18' onto the photosensitive surface of the xerographic plates associated therewith.
In the exemplary reproduction machine 5, seen best .n Fig. lA, the aforesaid xerographic plates comprise endless flexible photoconductive belts 20, 20' supported in belt modules 21, 21' respectively. A suitable charging device, 10'~57~i i. e. corona generatillg devices 22, 22', serve to uniformly charge the respective photoconductive belts 20, 20' preparatory to imaging at the respective exposure stations 23, 23'.
Each of the latent electrostatic images formed on the photoconductive belts 20, 20' passes through respective development stations 24, 24' whereat the image is developed with an oppositely charged developing material to form a xerographic powder image corresponding to the latent image on the belts 20, 20'. Thereafter, the developed image moves to the respective transfer station 25, 25' where the image is electrostatically transferred to one side or the other of a suitable support material, in this case web 28.
Following transfer, residual developer on the belts 20, 20' is removed at the respective cleaning station 29, 29' in preparation for the next copying cycle.
Web 28 is supplied from a roll 30, a web feeding system 31 being provided to advance the web in response to demand as will appear. Following transfer of a developed image to web 28, web 28 passes through fuser 33 whereat the toner image thereon is permanently fused. Following fusing, the web 28 is cut into discrete sheets at cutting station 34, the cut sheets then being transported by discharge conveyor 35 to an output or collecting station 36.

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BELT MODULES
The belt modules 21, 21' include a generally triangular sub~rame 3~ rotatably supporting rollers 39, 40, 41. Thé axes of rollers 39, 40, 41 are substantially parallel with one another and are disposed at the apexes of the triangular subframe 38. The belt modules are supported in cantilever fashion from the main machine frame 8 by means of projecting support shafts 42, 43, shaft 42 being coaxial with the upper roller 39 which is journaled for rotation thereabout. Suitable locking means (not shown) are proviaed to retain the belt modules on their respective supporting shafts 42, 43 and in predetermined operative position - relative to the remaining system components. The afore-described lock means is releasable to permit an entire belt module to be withdrawn for servicing and repair.
In order to provide the necessary operating tension on the photoconductive belts 20, 20' as well as to assure their proper tracking during operation thereof, supportingroller 40 is rotatably journaled in a swingable yoke having a stem supported for both rotational movem~nt about an axis perpendicular to the axis of roll 40 and for limited axial movement therealong. Suitable spring means mounted along the stem bias the yoke and the roller support-ed therewithin outwardly against the belts 20, 20' asso-ciated therewith to tension the photoconductive belt. The aforedescribed support arrangement for photoconductive belts is disclosed more fully in U.S. Patent No.
- 3,702,131, issued November 7, 1972.

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It is important that the photocond~ctive belts 20, 20' be substantially flat opposite their respective exposure stations 23, 23' and for this purpose a vacuum platen 45 is disposed on the belt module subframe 38 opposite each exposure station 23, 23'. The outer side 46 of platen 45 facing the photoconductive belts is substantially flat. A series of orifices in the surface 46 lead to the interior of platen 45 which in turn com-municates with a suitable source of vacuum tnot shown).
The exposure of the surface of the belts 20, 20' opposite platen 45 to vacuum serves to draw the respective belt tight against the side 46 of platen 45 to thereby assure a flat, photoconductive belt surface at the exposure station. To reduce friction and prevent scratching of the underside of belts 20, 21' a porous cloth or paper sheet is stretched across the platen surface 46. A more complete description of the aforedescribed belt hold down arrangement may be found in U. S. Patent No.
3,730,623, issued May 1, 1973.
Belt supporting rollers 40 and 40' are rotatably driven via suitable transmission means (not shown) from main drive motor 47, the photoconductive belts 20, 20' moving in the direction shown by the solid line arrow in Figure lA, To assure proper tracking of belts 20, 20' during operation ' thereof, the bearing support for roller 41 includes a track-- ing disc 48 tseen in Fig. 2) at one end thereof disposed in angular relationship to the axis of roller 41 so that a portion of the circumference of disc 48 rides against the edge of belts 20, 20' associated therewith. A double acting belt tracking switch 49 is 10'757~i cooperatively disposed witll the periphery of disc 48 diametrically oppositc the point where disc 48 contacts the edge of the photoconductive belt, the arrangement being such that excessive lateral movement of the belts 20, 20' in either direction along supporting roll 41 tilts disc 48 to in turn actuate tracking switch 49. As will appear, actuation of switch 49 works through the programmable controller to interrupt operation of the reproduction machine 5 under certain conditions of operation.

EXPOSURE SYSTEM
As best seen in Figures 2 and 3, the illumination and optical systems 17 and 18, respectively, cooperate to provide a light image of the frame or frames 11 on platen 14 at the exposure station 23, 23' associate therewith. The illumination systems 17, 17' are encased in a common housing 50 disposed over platen 14. Platen 14 is of a size sufficient to accommodate two frames 11, 11' at once and illumination housing 50 is sub-divided into two separate illumination chambers 51, 51' by interior wall 52. Each illumination chamber 51, 51' covers one half of the platen 14. A suitable flash lamp 53, 53' and condenser lens assembly 54, 54' are supported in each of the chambers 51, 51' above platen 14 to expose the portion of the film strip 12 thereunder respectively when lamp triggering means 55, 55' of a suitable d,esign are energized in a timed sequence under the control of the controller 200.

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TH~ OPTIC~J. sY~srr~
~ s best seen in Figurcs 2, 3, and 5, the optical systems 18, 18' transmit the light images gencrated upon actuation of the flash lamps 53, 53' to the exposure station 23, 23' associatcd therewith. The optical systems 18, 18' each include a lens 56. Since platen 14 is above and to one side of exposure stations 23, 23', a series of mirrors 57, 58, 59 which cooperate with the lenses 56 to provide an optical path 60 for the light images of the film frames on platen 14 to the respective exposure station 23, 23'.
THE DEVELOPER STATION
The latent electrostatic latent image created on the photoconductive belts 20, 20' at the exposure station 23 or 23' is rendered visible through the application of developing material ther~to at developing stations 24, 24', the developing material comprising a mixture of relatively large carrier particles and relatively small toner particles in triboelectric relationship to one another. Referring particularly to Figures lA and 6 of the drawings, developing stations 24, 24' each include a developer housing 62 supported on machine frame 8 and in operative juxtaposition with the belt modules 21, 21' proximate belt supporting roller 40. Developer housing 62 includes a lower sump portion 63 within which a supply of developing material is disposed. The portion of developer housing 62 adjoining the photoconductive belts 20, 20' is arcuate in conformance with the arcuate shape of the photo-conductive belts 20, 20' as the belts travel around the belt supporting roller 40. Supported within the housing 62 10~5';'~

in close, spaced relationship to the adjoining belts 20, 20' is a curved developer bed 65 across and through which the developing material passes during operation thereof.
Developer bed 65 consists of a lower base 66 and spaced upper electrodes 67, electrodes 67 being supported through sides 68 in predetermined spaced relationship from base 66 to form therebetween chamber 69 through which the develop-ing material passes. A suitable seal 70 is provided along each side of bed 65 to prevent leakage of developer from the developer housing 62.
The developer bed 65 is supported in a generally upright position in the developer housing 62, housing 62 including an inlet baffle 71 cooperable with the external surface of housing 62 to form an inlet to bed 65 in the chamber 69 thereof. The lower portion of housing 62 ad~oining bed 65 form~ an outlet passage for the develop-ing material to route the developing material back to the sump 63 of housing 62. The developer bed 65 is supported within developer housing 62 on flexible members 73, one side of the developer bed 65 being drivingly connected with a suitable vibrating mechanism such as acoustic coil 75.
To provide a flow of developer across elec- -trodes 67 and through the chamber 69 of the developer bed 65, a developing material conveyor 77 is provided. The supporting roller 78 for conveyor 77 is driven by motor 79.
Conveyor 77 serves to raise developing material from the sump 63 and discharge developer onto the inlet baffle 71 leading to the developer bed 65. A more complete descrip-tion of the developer may be found in U. S. Patent No.

3,613,637.

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TI~SFER ST~TIO~ ~
The images developed on the photoconductive belts 20, 20' are electrostatically transferred onto the side of web 28 opposite thereto at transfer stations 25, 25'. To facilitate transfer and SUDSequent separation of the web 28 from the surface of belts 20, 20' without arcing, suitable transfer corona generating devices 81, 81' are provided opposite belt supporting rollers 41.
CLEANING STATION
Follo~ing transfer, residual developing material remaining on the belt 20, 20' is removed at the cleaning station 29, 29' associated therewith. Cleaning stations 29, 29' include a housing 82 within which are mounted a pair of brush type cleaning rolls 83, 84, the periphery of which is in contact with the surface of belts 20, 20' associated - therewith. Pick-off rollers 85, 86 engage each of the brush rollers 83, 84, respectively, rolls 85, 86 serving to remove developer picked up by the rolls 83, 84. A flicker bar 87 engages the rolls 85, 86 to remove developing material picked up by rolls 85, 86 from the cleaning rolls 83, 84, the removed developer being urged from the housing 82 by suitable vacuum means (not shown). The several rollers of cleaning stations 29, 29' are driven by motors 88, 88', respectively.

5'7~i W1~13 I'E~DING Ml'CIIANISM
Referring particularly to Figures 2 and 5 of the ~rawi.ngs, the copy substrate material 2~ is supplied from a relatively large roll 30 supported upon a shaft 90 and disposed in a paper supply housing 91 appended to main housing 9 of the reproduction machirle 5. Drcg brake 92 on shaft 90 restrains rotation of the supply roll 30. Web 28 is unwound over a first de-curling roll 93 rotatably suppor-ted within ~he housing 91 proximate supply roll 30. The a~is of the de-curling roll 93 (Fig. lA) is substantially parallel with the axis of supply roll support shaft 90.
From the de-curling roll 93, web 28 passes over guide roll 94 where the web 28 is turned through an angle of approximately 90. For this purpose, guide roll 94 is rotatably supported within housing 91 at an angle of 45.
From guide roll 94, web 28 passes through a second de-curling device 96 and around guide rollers 97, 98 to splicer 100.
There may be provided a suitable detecting means 99 for detecting the end of the roll 30. The detecting means is so positioned that it detects the end before the end reaches the splicer 100. The detected signal may then be used by the programmable controller to stop the machine to permit the operator to mount a new roll and splice it to the old roll being used up. Splicer 100, which may comprise any suitable paper splicing device, serves to enable the leading edge of a fresh supply roll to be attached to the trailing edge of the previous web. Following splicer lOQ, the web 28 passes over a second guide roll 102 which turns the web through 90. WeD
28 then enters housing 9 of the reproduction machine 5.

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~ s web 28 entcrs the m~chlne housing 9, the web 28 passes over feed roll 10~, roll 104 being driver by web fecd motor 105. ~ dancer roll 106, which is arranged to float vertically in slotted openings 108 in the machine frame 8, cooperates with feed roll 104 and downstream guide roll 109 to give a proper tension to the web 28. Switches 111, 112 cooperate with dancer roll 106 enable t~e supply and continuity of web 28 to be monitored as will appear hereinafter.
From dancer roll 106, the web 28 is routed via guide rolls 114, 115 to the dual transfer stations 25, 25'.
Guide roll 115 serves to tension the web, roll 115 being supported upon a displaceable frame 116. Spring 118 biases the frame 116 in the direction of web feed to maintain a tension upon the web 28. Following guide roll 115, web 28 is drawn past transfer stations 25, 25' and through fuser 33 by feed roll pair 119, 120, roll 120 thereof being suitably driven by motor 122 to advance web 28 against the tension imposed by the guide roll 115. Following feed roll pair 119, 120, web 28 is advanced to cutting station 34.
To enable the belt modules 21, 21' to be operated independently and belts 20, 20' thereof to move without contact with web 28, rolls 123, 124 are provided adjacent each of the transfer stations 25, 25'. Each roll 123, 124 is supported upon a displaceable frame 125 designed to enable the rolls together with the portion of the web therebetween to be moved into and out of transfer contact with the photoconductive belts 20, 20'. Suitable drive means, such as solenoids 126, 127 actuable by the controller 200 are provided to selectively move the rolls 123, 124.

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Followin~ trallsfer of the developed image to web 28, the web passes through fuser 33 wherein the toner image is permanently fixed. Fuser 33 comprises a heated fusing roll pair 129, 130 forming a nip between which web 28 passes.
External heating lamps 131, 131' serve as the source of heat for fusing rolls 129, 130. Fusing rolls 129, 130 turn in the direction shown by the solid line arrows in the drawings, drive motor 132 being provided for this purpose. To permit pressure between fusing rolls 129, 130 to be relaxed, as, for example, when web 28 is stationary, roll 129 is supported for limited translating movement toward and away from the roll 130. A suitable drive means such as solenoid 133 actuable under the command of the controller 200 is provided to selectively displace roll 129 into and out of contact with roll 130. Alternatively other suitable fusing means such as flash fusing means may be used to effect the fusing operation.
FILM
Referring to Figs. 3 and 4, the document originals 11 in the form of film to be copied are, as illustrated, in frames 11 arranged in series in a film strip 12 and mounted on a supply reel 134. A film take-up reel 135 is disposed on the opposite side of platen 14. A suitable film advancing means 137 and 137' is provided to draw the film from reel 134 and advance the same across platen 14 and onto take-up reel 135.

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Tl ~ filln adVclll('.il:~ In~a~, mL~y bc arr~ y~d o advanc~
the ~ilm str.ip 12 in con~inuous ~ashion in taking up t~,c film leader or in rewinding the film or indexing the film 12 during copying operation, as directed by the controller 200.
To identify the individual frames, code marks 138 are provided along one side of film strip 12 and marks 138S, 138E are provided to identify starting and end frames to indicate the start and end of each document series. Control marks 138 are also relied upon to locate the individual film frames in proper position on platen 14. Suitable photo-electric detectors 139S, 139A, 139B, 139E are provided adjacent platen 14 to read the marks 138S, 138, 138E on the film strip 12.
In operation, the operator loads a selected supply reel or cassette 134 in place, and manually threads the film leader onto film drive path, across platen 14 and onto take-up reel 135. A suitable slew control means in the form of a button 507 on the operator console 500 may then be used to operate motor 137' to take up the film leader.
The film strip 12 may have been previously prepared off line by a suitable camera (not shown) which is used to render a photographic rendition, in the form of image trans-parencies of the individual pages of the original document originals. A suitable device, such as selectively operated light sources (not shown) may be employed 10'~'7~j to L>rovi<l~ c co~l~ m~ ks 13~S, 13~, 13~ when the film strip is prcpared.
~ film strip 12 may be ~irst prepared by photo-graphing a number of books or documents, each having any given number of pages, up to its frame capacity. For example, suppose one of the books or documents has one hundred pages.
The first frame pair will comprise images of pages 1 and

2 ard will carry code marks 138S and 138. The second negative pair are images of pages 3 and 4, and carry a mark 138 for each of the pair. T~lis continues until the last negative pair, images of pages 99 and 100, which bear marks 138 and 138E. It will be understood that depending on the length of film strip 12 available and the number of pages in each document, a number of complete documents, the position of which on film strip 12 is identified by code marks 138S, 138, 138E
may be provided on a single film reel 134 in a convenient cassette form. Suitable legends are normally provided with the completed film reel to identify the various documents and their position on the film.

WEB CUTTING STATION
Referring to Figure 7, cutting station 34 includes a guillotine knife 160 supported by carriage 161 for reciproca-ting movement into and out of cutting relationship with lower knife member 164. Carriage 161 is supported for slideable up and down movement in frame journals 162. A rotatable eccentric driver 165 is journaled within carriage 161 and serves on rotation of eccentric shaft 166 to reciprocate tj carria~e 161 and guillotinc k~i1e 160 u~ an~ do~Jn. A suitahl~-driver ~or cJuillotine knife 160 is provided, exemplificd by drive motor 167 coupled to eccentric shaft 166 via a solenoid operated clutch 168.
AJ:mature 169 of clutch control solenoid 170 cooperates with clutch stop 171 of clutch 168 to engage and disengage clutch 168, it being understood that contact of ar~ature 169 with stop 171 retains clutch 168 disengaged and motor 167 and eccentric shaft 166 uncoupled. Upon actuation of solenoid 170, armature 171 is withdrawn permitting clutch 168 to engage and drive eccentric shaft 166 to operate guillotine 160. Subsequent de-energization of solenoid 170, normally immediately thereafter, returns armature 169 into blocking position for engagement with stop 171 following one revolution of eccentric shaft 166. Actuation and deactuation of solenoid 170 is placed under the control of the controller 200 so that the operation of the guil~otine is properly synchronized with the rest of the machine operation.
To pxevent movement of web 28 during cutting, feed roll pair 174 brake to a stop during the cutting process, the continued feed of web 28 being accommodated by the adjoini.ng structure in the form of a buckle 28'. A suitable brake/clutch control device 172 is provided for roll pair 174.

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Hereinabove, major machine elements of a reproduc-tion system embodying the present invention has been briefly described. As apparent from the foregoing description certain of specific operative steps indicated, such as exposure, image transfer and cutting operations must be precisely timed whereas certain other steps, such as the operation of the charging station for the developer, have to be operated in proper sequence although precise timing is not essential.
These operational steps are implemented by actuating device control means that actuate process step implementing means provided therefor.
These timed control functions for reproduction systems which have been provided heretofore principally by hardwired logic are now implemented in accordance with the present invention by a programmable controller wherein the sequencing and timing of the operative steps are now programmed in software instructions and can be stored to run the machine and can be readily modified to the change sequence and timing to alter the process steps for making prints or copies of different sizes and programmed by the operator. Hereinbelow, an illustrative embodiment of the programmable controller used to operate aforedescribed copier/duplicator machine will be described in detail.

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rl~oGl~AM~ Ll: CONl'l~OLL~R
. _ _ Referring to the system block, diagram shown in Figure 8, the pL-ogrammable controller 200 for reproduction machine 5 includes a suitable programmable computer 201, togeth~r with interface circuitry 203 for operatively coupling the computer to the various control device elements of the reproducing machine and the operator's control console 500.
For timing the operation of the reproduct.ion machine, there is provided a timing signal clock pulse generator 207.
Preferably the clock pulse generator may be of such an arrange-ment that its output repetition rate is related to the speed of the machine main drive motor 47 that drive the belt rollers 41 and 41'. In this manner the clock pulse train output 208 producea by generator 207 is time related to the operational speed of reproduction machine 5 and, in particular, to the speed of the travel of the belts 20 and 20' and the web 28.
As apparent from this, given a fixed rate of travel of the web or belt, the pulse count can be used to measure the travel distance.
As shall be explained in detail, the computer is programmed so that during the initialization period when the machine is programmed to make a particular copy run, means are provided ~or the operator to indicate a length of the image impression, plus an appropriate amount of space. Fc;r convenience and ease of reference, the length plus space will be called pitch; also note that the impression length c-ontrols 1l)'7~

~lle pitcl~ or im~c~e lcnc~th and thus the time intcrvals bct~ccn successive machine process events. Givcn the pitch length information, the computer is programmed to calculate a list of the time intervals between the successive process events which are stored in a table or storage location 205 of a suitable memory 206 of the computer. For each pitch cycle, a pitch signal for an imaging cycle is generated by the computer.
The pitch signal may be keyed to suitable machine process events, such as image exposure step, that can be used as a reliable time reference point. The pitch interval, that is the time interval between successive pitch contains the controls signals for the machine process events for each imaging cycle.
In operation, each of the successive time interval count numbers in the table 205 is stored in a counter 209 in succession for the successive machine process events. In response to a start command by the ccmputer the machine starts to operate and starts an imaging cycle. The start of the imaging cycle is marked by a pitch pulse. Thereafter, the next count stored in the counter is decremented to zero by the clock pulse counts. As it decrements to zero the computer generates a control signal and addresses it out to its intended device control elements or means to implement a machine event. This process continues until the end of the pitch. The process is repeated again for the succeeding pitch interval until a copy run as programmed by the operator is completed.

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While the counter 209 and the table 205 for the process events may be provided internally within the computer, it need not be so limited. For example, the counter may be provided external to the computer and essentially operated in the same manner as described above.
In accordance with an aspect of the present inven-tion, a suitable program, such as the one more fully described below, is stored in the memory 206 to run the computer as described above in generating the various signals required to operate the machine. In this connection the stored program includes instruction routines to enable the computer to calculate the count numbers, i. e. the timing list for a particular reproduction or copy run for a given pitch and other information pertinent to the reproduction run.
As is well known generally, a computer operates at an extremely high speed compared to a mechanical machine.
Likewise, in the present system, the reproduction machine operates relatively slowly compared to the computer 201. In fact, the speed disparity is such that the computer can do all necessary chores to generate the timed pulse signals to implement the machine events, such as exposure, develop, transfer, cut, etc. and yet have substantial amount of time left over to perform other chores. Accordingly, in accordance 10'i'~'7~j will~ o~ L)(~ o~ tllc~ l~r~ v~llLi~rl, ~ o~ u~r is utilize~ to perforlll a number of other functions utili~incJ
its ~ree ti~c intervals~ such as housekeeping chores, monitoring and updating of timing list, etc.

- PROCESS PATIIS AND WORK STATIONS
R~ferring to Figure 8, the timed control signals generated by the computer are applied via the interface circuitry 203 to various control devices of the work stations in the various process paths that implement the process steps or machine events in making copies. The nature of the paths can be better appreciated on a functional basis. Thus, there is a paper path formed by the paper web 28, xerographic photoconductor paths formed by the belts 20 and 20' and imaging path formed for the film 12. Control devices are provided at the work stations along these paths to implement the specific machine function or process events.
Now referring to the paper path shown in Figure 1, ard depicted in a separate figure, Figure 10, there is pro-vided means 99 for sensing the trailing end of the web supply, suitable detectors 111 and 112 for sensing the tension or other conditions of the web 28. The path also includes one or more sheet jam detectors 113 for monitoring the con-dition of the individual copy sheets downstream of web cutting station 34. Other operating stations in the paper path include web control solenoids 126, 127 which move the web 28 into -2~-~'757S6 and ou~ oE -trans~er relationship wi-th tlle photoconductive belts 20, 20', respectively, at transfer stations 25 and 25', a fuser loading solenoid 133, a quillotine drive solenoid 170, and a deflecting gate drive solenoid 402, for effecting the transferring, fusing, cutting and deflecting operations.
Along the xerographic paths, essentially formed by the belts 20 and 20' as depicted in Figure 12, there are provided exposure stations 23, 23', developer station 24, 24', transfer stations 25 and 25', cleaning stations 29,29' and charging stations 22, 22' for their intended functions.
The optical path or image forming path, as depic-ted in Figure 11, includes means 55 and 55', for triggering the lamps 53 and 53', in precise timing so that they produce electrostatic latent images on the belts 20, 20' at the proper time. The path also includes the means for advancing and positioning the film strip 12 where the advancing and posi-tloning of the film must be time synchronized to the machine operation frames to be copied.
The control devices shown positioned along the paths are described as illustrative of various means that may be utilized to implement machine process events and that are to be controlled by the controller. Accordingly, they should not be construed as complete or limiting.

10'~5'i'~tj 'l`lle indiviclual cont1-o1 dcvic~s or l~lcalls ~ t implemcnt or monitor the machine events or functions, may be made of any suitable conventional means, such as solid state devices, photo optical sensin~ means or switches, exposure circuits, solenoids, etc., arranged to monitor various states or respond to the actuating and deactuating signals from the computer via the I~O interface 203.
As generally seen in Fig. lB, the operator console 500 may include any suitable input and output means such as a set of push buttons 501 for enabling the operator to key in digit numbers such as the document and copy numbers for a particular reproduction run. The computer is so programmed that the document numbers and corresponding copy numbers keyed in via the digit keys in any random order are placed in proper order and sequence in the computer memory 206 for later use.
Suitable means including a push button 502 are provided for the operator to indicate to the computer that a document number is being keyed in. Similarly, a push button 503 with appropriate means may be provided to signify to the computer that the digit keyed is copy numbers.
There is a limit as to how many documents may be copied per reproduction run. The upper limit depends on a number of factors such as the capacity of the film the computer memory capacity and the number of pages. Taking all of these into account, in the present embodiment the computer was programmed to copy up to any suitable number such as lG documents per reproduction run.

10'75'7~j In accordallce witll a~lo~llcr aslect of th~ ~rosent invcntion the computer was procJrammed to make a copy run for making only parts of documents. Thus, suppose a document has 100 pages and the operator wishes to copy pages 50 to 70.
The operator would code in page 50 as the start and page 70 as the end pages for that copy run.
For correc-ting erroneous entry, the console may include suitable means with appropriate entry means 509, the pressing of which in conjunction with the document number or copy number will erase the corresponding stored digit numbers. For displaying the machine status information such as the copy run information visual indicating means 510 with appropriate actuating buttons 511, 512 are provided.
The console 500 also includes a visual display meàns ,14 indicating a malfunction and the nature, condition, and the location of the malfunctioning part.
Console 500 also includes a power-on switch 520 print start button 521, and film slew control 507. Console 500 also includes suitable means 523, 524 for selecting simplex or duplex, operation of the machine. The pitch length of the copy run may be entered after pressing a push button 528 provided for the purpose and then making digit entry of the length using the digit keys S01. The console also includes a push button control key 531 for jogging or advancing the copy paper web increments.

.

iO~7$''~

Ill a~ }~ ol~ y illclu~ ally llum))(~
of keys 533, 534 ... for any spccial function that can be actuated to input si~nals to the computer to per~orm the special ful~ctions.
INTERF~C~ CIRCUITRY
Figure 9 shows an illustrative embodiment of an interface circuitry 203, in a functional block diagram, that connects the computer 201 to the various operating control devices of reproduction machine 5 and the operator control console 500. Interface circuitry 203 is designed to serve the function of enabling the operator to input copy run information to the computer to run the machine 5 in a partic-ular mode and provide visual output signals indicative of both machine and program status and malfunction conditions at the operator eontrol console 500.
It also serves the function of enabling the computer to monitor various work stations in the proeess paths and ehannel the timed control signals to the various eontrol devices in the processing paths. In short, the interfaee eireuitry is so designed that it enables the eomputer to address or monitor in successive cycles the various stations or eontrol deviees positioned in the eontrol console 500 and proeess paths of the machine.
More specifically, referring to Figure 9, an address deeoder 241 is operatively disposed between the computer 201 and individual lateh eircuits 2~3a, 243b ... 243n and monitoring or sean eireuits 251a, 251b ... 251n. The lateh 1(~7S'7S~;

cil-cuits a~e conllec~ed o~era~iv~ly to ~ various control devices, sucll as the cxposure lamp triggcrilly means 55 and 55', solenoid actuatillg means 126, 127, 170, 402, film advancing means 137 and 137', various switches at the console, etc. ~hen set or toggled as the case may be, the latches cnable the control device elements to implement the machine process events or give visual indications to the console. The monitoring or scanning circuits are connected to the sensing means, such as the means 111 and 112 for monitoring the web 28, film code sensing means 139S, 139A, 139B, 139E, jam sensing means 113, etc. for sensing the status of the various stations being monitored by the computer and the various push button input means at the operator console.
-- With a given decoding capacity, for example, an 9 bit decoding capacity, the decoder 241 can correspond to 9 bit address words from the computer 201 and decode and address up to 29 or 512 lines. The latch circuits 243a, - 243b .... 243n may be reset or set selectively by a signal via set signal paths 246 and checked selectively as addressed via the address decoder 241 and its output paths 242a, 242b, ... 242n. Selective setting, resetting and toggling takes place as the decoder 241 decodes the address words and applies the strobed out output to the selected or addressed latches when the STROBE OUT clock pulse is applied thereto via a path 247. The selected latch then assumes the condition indicated by computer output lines 9 and 10. It will set if 10 is high and 9 is low, reset if 9 is high and 10 is low, or toggle if both are high.

10'i'5~7~
~ r~y i~ (J ~ Lcl~u~ Or L~ v.ri~u~
monitorincJ mealls, the compu~er addresses them via the decoder 241 and scan~ circuits 251a, 251b. . . 251n in succcssion.
The scanned status signals are applied to a latch circuit means 257 via OR ~ate 255 and are sent to the computer 201 when stro~ed in by strobe signals applied to the latch 257 in succession via a STROBE IN signal path 258. In this manner, the computer strobes the copy run information from .he control console in various keys as the information is keyed in.
The copy run information that the operator programs into the computer in this m~lnner typically includes the condition of the image length, the documents numbers and copy numbers, and the simplex or duplex mode and the like informa-tion that t~e computer requires in running the machine in making the copies.
TIMING OF CONTROL SIGNALS
Certain of the reproduction process steps, such as exposure step for forming latent images on the belts 20, 20' and actuating the guillotine cutter, etc. requires precise timing. There are other machine process events or steps, such as the actuation of the transfer solenoids 126 or 127 or both, depending upon whether or not the machine is to be operated in a simplex of duplex mode. The operation of the cleaning and charging corotrons are generally of such a nature that they must be actuated at the initialization period and kept on for the rest of the copy run or actuated and deactuated during each of the imaging cycles wherein proper timing sequence is required.

-3~-1(~'75'7~j 'l`lore ar~ o~ r ty~s of CV~ tS WlliCIl occur ~t random ancl whicl~ are not time related to the machinc operation cycle, such as a paper jam, Çuser over-temperature, paper splice belt runout condition, and the like. These events normally represent machine malfunctions or interrupt conditions which must be monitored and acted upon when they occur.
The way the control signals are derived according to the present invention will be now described in detail in terms of "pitch" zones and process events taking place in successive pitch zones in succession during the successive pitch time intervals in the various process paths, namely, the copy paper or web 28 path, the photoconductive belts paths 20 and 20' and the film path.
Each of these paths may be considered as being divided into "pitch" zones where pitch refer to spatial equivalence to a "pitch" zone in the xerographic path, i.e., an image impression length plus a suitable space on the photoreceptor belts 20, 20' traveling, at a constant speed.
Here it may be noted that the process speed of items in different process paths need not and in fact are not generally at the same speed. Thus, for example, the speed of the film is much faster than the belts and moreover does not travel at a uniform speed. In case of the paper path, the web travels at a uniform speed until the guillotine cuts the web into successive sheets containing images. But the cut sheets can be moved out faster than the rate at which the web travels. These process paths with different processing speeds are tinle and space related tc the travel speed and distance of the belts. This relationship can be visualized by .

i6)7 Co~ L~ y ~ l.c; ,Ir~ ~livi ~ -o L)i whcrcin tlle start and the end of each zone in each path corrcspond in time to thc start and end of the pitch zones in the belt.
Various process speeds at different paths and zones are different. Hence, the spatial distance traversed by the items being processed are different. sut, the pitch zones are deemed set up so that the events taking place in the various zones of the different paths controlled to time relate back to a reference process path, namely, the xerosraphic process or the photoconductor process path in the process system.
Accordins to an aspect of the present invention, the computer 201 is programmed to run and generate timed control signals to the various paths in successive pitch cycles as the belt travels pitch distances in succession.
The timing of the control signals and application of the signals to the control devices at the various work stations in the various process paths will now be described in detail with reference to the process paths illustrated in Figures 10-14.

s~

~ `ig~lre 10 shows ~hc paper wcb 28 traversing t~lrougl the paper path, l,he we~ tellsion scnsing means 111 and 112, roll end scnsing means 99, engaging means 126 and 127 for engaging and disengaging the web 28 from the image transfer stations 25 and 25', fusing station 33 and deflecting means 400 for de~lecting unwanted sheets into reject bin 401.
Figure 11 shows the film path with film reel advancing and positioning means 134, 137 and 135, 137' and image exposure stations A and ~. Fig. 12 shows the photoconductive paths which includes image exposure stations 23 and 23', image development stations 24, 24', transfer stations 25 and 25' and cleaning stations 29 and 29', and charging stations 22, 22'.
Suppose the machine is set to operate at a given speed so that belts 20, 20' are driven at 20 inches per second, that the belts are 40 inches long, and the pitch length is 10 inches, that is, one impression plus one spacing between impressions. This means that the belts travel past the image exposure station 23 and 23' at the speed of 10 inches per image or pitch. Given the foregoing conditions, it can be visualized that the belts can have four pitch zones, I. II, III and IV with each pitch zone corresponding to a distance the belt travels past the exposure station between successive exposure. For convenience, the time interval it takes for the belt during two successive exposures may be called "pitch-time interval"
and an "imaging cycle" interchangeably. Similarly, the 75'7~

L l:wo IJ<II-t';, ncllnC`Iy~ L~C~ `1^ L~lth alld Lilm l~.ltll; c~ln be imagined as ~ing divisil~le into pitch 7.0ncs so that thcy are time related back to the pitch zones in the photoconduc-tor belt.
The spatial and timing relationship evident from the foregoing can be appreciated further from Figures 13 and 14 which graphically illustrate the timing and spatial relationship between the paper and the belt paths and various process steps that take place in the pitch zones in their paths. This can be better described in operational context as follows: In operation, the film frame pairs 11A and llB
in film strip 12 are simultaneously positioned on platen 14.
(Fig. 4). In a simple operation, one (11A) or the other (llB) frame is exposed and the light image A' or B' formed is projected onto the belt 20 or 20' to form a latent electrostatic image. In a duplex operation, exposure of the frame llB ( B') is delayed by suita~le time interval dt (Fig. 13) after exposure of frame llA, to allow the web 28 to travel from transfer station 25 to station 25' to effect back-to-back alignment of the impressions produced on web 28.
As illustrated in Figures 13 and 14, the belts 20 and 20' are exposed to the lighi images A' and B' at times tl and t3 during a first pitch interval in the first pitch zone I, to form the latent images. The images are then developed at pitch zone II durin~ the following or second pitch time interval. The developed images are then transferred at pitch zone III at the time t2 and t4. The transferred images ~' and B' are thereafter fused at pitch zone I~ during the -3~-1075'~

~; I] C C e e (~ 01- L O U L- L h ~ ; ] ~ r V~ e W~ ~b ~ ~3 C 011 ~ I C
impressions is then cut by a guillotine 160 at pitch zonc V
during tle next oE ~ifth pitch interval. The de~lector gate ~00 in pitcl- zone VI is actuated at time t6 in the sixth pitch interval when a cut sheet has to be scrapped. Otherwise the acceptable sheet is collected at the collection tray at t6. Pitch zones are set up so that the start, to and tend of each of the pitch zone intervals coincide with one another in timing sense.
Once the paths are loaded, the aforementioned process events in the various zones occur in the time sequence shown in Figure 14 on different images processed in the various zones.
It can be appreciated from the foregoing that where copying processes for multiple copies are well under way, a number of i~.ages are in process concurrently, but at different states in different zones. Thus, for example, at any given instant in time, an image may be undergoing fusing operation in pitch zone IV, while a second image is undergoing transfer operation from belt 20 to web 28 in pitch zone III, a third image is undergoing development on photoreceptive belt 20 in pitch zone II and a fourth image undergoing exposure in pitch zone I.

-3~-. . .

10'75'7~i rOL (`llll `ll L i On(`Cl illl<lg i.ll.lry p i t,C~I ;'.011~'~; .Ire sc' l_ up so that thcy correspond in time, i.e., start and end at thc same time, so that the process even~s for different images occurring at the various pitch zones occur during the same pitch time interval. These process events are repeated in succession for each of the pitch time intervals in the various pitch zones in cyclical manner until the copy run is com-plated.
In accordance with an aspect of the present inven-tion, a software program is used to operate the computer 201 so that it generates the timed signals for the time process events El, E2, E3, etc. . . . En taking place at the vc~rious zones in the manner described above and apply them to the corresponding control or monitor devices via the interface circuitry 2~3. The computer is programmed to perform the foregoing operation for each of the imaging or pitch cycles in succession for the entire copy run.
The foregoing general description of the way the control signals are derived using a programmable controller or computer will now be described in detail in terms of a specific example. Assume the clock pulse ger:erator 207 is designed to generate 1000 pulses per pitch interval and that the process paths are fully loaded. ~eferring to Figure 14, during each pitch interval the computer generates the timed control signals for the machine process events in succession at successive time intervals starting from the pitch pulse starting time, to~ generated by the computer after the operator commands the machine to print.

.

5'7~j ~ x~-o~lr~ f~r L~l~ Lr~ c~ur~
givcll time, for e~ample, 230 clock pulses aftor to~ at zone I, and trans~er of an earlier developed image at zone III a~
450th pulse at t~. In the first photoconductor belt path 20', expose another frame llB at 490th pulse at t3 in zone I, and transfer still anotller earlier developed image at 650th pulse at t4 in the second belt path 20' in zone III. The web containing a developed and fused image of still another frame is cut at the 770th pulse at t5 in zone V, and a decision to eject or not eject at the 800th pulse at t6 in zone VI.
As alluded to before, the pitch start time t may be internally generated or even keyed to a specific machine process step that can serve as the reference or bench mark at the start of each copying or imaging cycle. For example, although not so shown in Figures 13 and 14, the exposure step can serve as the start for the imaging cycles for the belt path 20. In Figures 13 and 14, this can be readily done by shifting the zone marks to the right so that the exposure step coincides with the start time of the first pitch cycle.
The computer 201 is programmed to calculate the time intervals between the successive machine process events in the form of corresponding, clock pulse counts 230, 220, 40, 160, 120, 30 . . . during the initialization as illus-trated above and stores them in the memory table 205. In .

. . . ...

10757Sfà

operation, the computer places the count numbers ill the counter 209 in the mcmory in succession and the number on the counter is decremented by the clock pulses from the clock signal generator 207. As thecount is decremented to zero the computer generates a control signal and applies it a control device. The counter is then reset with a succeeding count and the rest of steps of decrementing, etc., follo~s.
In this manner, the clock pulse count of 230 is first stored and decremented to zero to generate the transfer signal and so forth until all of the timed control signal pulses for the pitch duration are generated in succession for the entire copy run and addressed and applied to corresponding control devices or control elements to effect the corresponding process events.
During the initial period while the zones in the paper and belt paths are being filled with the images being processed and during the cycle out period while zones are being emptied as the images being processed are cycled out, the computer is programmed to generate appropriate control signals and apply them via the interface circuit 203 that includes appropriate modification to the control signals over those for the fully loaded situation so that only those of the process events for the zones being filled with images ; in precession are acted on and events for the empty zones are not implemented. The computer is also programmed t~ respond to the paper jam or other machine interrupt con-ditions and handle them appropriately.

1075'7S~
<ic c,r ~ softw~( to r~ln ~he com~uLcl- ror dcr i VillCJ
thc timed control signals rcnders the control for tlle machinc highly flexi~le. Thus, for eY~ample, controller can be programmed to make images of different length (in the direction of the travel), i-.e., make the machine operate at different pitch lengths for different reproduction or copy runs. The pitch, i.e., copy length, can be changed from one reproduction run to another by using appropriate instructions in the software routine stored in the computer and without entailing any change in the hardwired logic and the machine.
This is accomplished in accordance with the present invention by having the computer calculate, for each copy run of different pitch length being set up the operator, a set of timing lists in the form of the clock pulse counts for the successive time intervals between the successive process events.
The computer is programmed to do this operation during the initialization phase of the particular reproduction run.
Consequently, changes required in the timing of the timed control signals for a new reproduction run which is different from the earlier run due to the change in the pitch or copy image length are implemented automatically under the control of a stored program and all the operator is required to do is to indicate or key in the pitch length for the reproduction run about to be made.

5~7~j 'l'l~i.s is in col~trast to Lllc conv~ntion~l colltrol systems utilizillg a llardwired and fixed locJic; although to a limited degree a hardwircd logic can be adapted to accommodate variable machine timing, its complexity expands so quickly as the number of machine process control steps and timing variations increase, that either the machine per-formance must be sacrificed or entail high cost for the hardwired logic.
Generally, in accordance with the present invention, the controller can be programmed to vary the timing sequence and cycles of the control signals, composition and order of the control signals, etc., to meet the changing need of reproduction runs or machine characteristics. This can be done by software with a master program having various optional features stored in the controller that entails little or no change in the hardware, logic and mechanism.
Thus, for example, the present controller can be programmed to run the reproduction machine in a single pass duplex mode whereby copies can be reproduced with impressions on both sides of copy sheets in a single pass of the copy sheets through the process path. Also, with appropriate optional features, the software control can also render the machine readily expandable to add new functions to the machine with little or no changes in the circuitry of the controller, and thereby upgrade the machine capability. For example, an optional instruction routine may be provided for enabling the controller to generate control signals that will enable the xerographic process implementirlg stations to skip a splice or other types of defective portions of the wcb 28 being advanccd to avoid forming impressions thereon.

- q ~l ~

10'75'7~i J`o ~ Lll~ r(~ y o~ ~L,~r~.ir~(J ~
reproductioll m~clline dcscribcd abovc using a computer, a software program was devclope~ for a PDP8/S computer available from Digital Equipment Corporation; it was programmed to provide many functions, including the function of calculating and providing the timing list of the control signals for successive machine process events in terms of signa~s for successive machine process events in terms of the cloc~ pulse counts for a given pitch or copy length indicated by the operator. An illustrative software program used for a PDP8/S computer is included below. The program will be briefly described in terms of the software program routine architecture shown in Figure 15 in conjunction with the accompanying operational flow charts shown in Figures 16-28.
SYSTEMS SOFTWARE ARCHITECTURE
Fiyure 15 shows, in general, a software architec-ture that parallels the operational process steps shown in the flow eharts in Figures 16-23 in operating the copier/
duplieator machine 5. Broadly, the routine ineludes steps for initializing and placing the computer into STANDBY
mode and ealculating the timing list for timed maehine events, then placing the computer into EXECUTIVE mode so that the eomputer generates the control signal~ for the timed machine proeess events El, E2, E3 ~ . . En the housekeeping control signals for monitoring the operating status of the various maehine eomponents and maehine malfunctions, and real time maehine funetions events, Tl, T2, T3 --- Tn.
Specifically now referring to the STANDBY mode operation, after power is applied to the computer and interface logic (See Figure 16), an instruetion routine is used to RESET the lateh eireuits 243a, 243b, . . . 243 and 1~'7S'75~

.AG ~lliY 1~1U1t COI1di.t:iOI1. AI~IJrOPria~ e 1'LI~(; rC)Ut~il1CS .Ire USCd to program the computer so that the computer checks with various monitoring and control elornents to check readiness for operation.
~Fter the foregoing routine, the power is applied to the machine 5 itself. (See Figures 17 and 18).
Next the software routine enters a SWITCH SCAN loop for enteriny copy run instruction data from the operator console as programmed by the operator and status of monitoring devices in the machine. This routine entails the steps of scanning the various input means or keys in the operator console to receive copy run information and other operator instructions, and the status signals of the machine and calculate the timing list for the timed control slgnals.
For SW~TCH SCAN routines the computer is programmed to scan various input terminals at the operator control console.
Referring to Figure 1~ showing the control console, the input information applied to the computer by the operator such as the pitch length, copy run (i. e., document number, copy numbers), mode of operation (i.e., simplex or duplex) are applied to suitable register circuits means (not shown) including the AND gates 251a, 251b, . . . 251n. The inputs so provided are strobed into the computer in succession as the computer addresses them one at a time at a very high speed.

$'7~

'rh(` COlll~ e~' Or~('r~lt-iOIl-ll ';pc('d i', c~t:r(~m~ly t~';t comparccl to ~l~c spccd witll whicll the opera~or kcys in the input inormat:ion. Conscquently, if need be, thc computer can be programmed to scan an input instruction from the operator console several times and determine statistically on the basis of composite result of the scanned input the genuineness of the input and store the instruction. This feature renders the control immune to electrical noise signals which would otherwise interfere with the operation of the controller and thus of the machine.
The importance of this noise immunity feature is especially significant in view of the fact that xerographic reproducing machine to be operated by the programmable computer is inherently a very noisy machine in the electrical sense because of the high AC and DC corona generating power supplies which range in the order of thousands of volts. The noise immunity feature is attributable to a number of factors.
Thus, for example, the scanning operation implemented by the i softeware control as described above enables the computer and interface logic to use DC power supply in the range of below 20 to 30 volts D. C. There are other factors that render the machine less noise immune: For example, the input signals from the control console are not directly applied to the computer but selectively examined by the computer using the interface circuits. In this manner, the computer need only examine those signals which are necessary for the operation of the system .

1-~'7S'7~

Ll L~'Ul-lr gi.V~ .i.lll(`. All olll~r ii~JIla~s C~ln 1Je iC3n~r(~(~
so that noise on thesc other signal lin~s cloes not affect th-operation of the systclll. Secolldly, the noise signals, e.g.
conducted and radiated noise, that might pass through the buffercd isolation are prevented from affecting the internal operation of the compu;er because of the sampling approach used in the input scanning operation. In this regard, it is noted that the scanning and sampling time interval is typically in the order of only microseconds or submicroseconds whereas non-scanning timing interval is in the order of miliseconds.
So the probability of noise signals occurring in the microseconds or submicrosecond scan time slot as opposed to the milisecond non-scan duration is very small. Consequently, the probability that the scanning operation will take up the spark noise is extremely low.
Furthermore, if in spite of this noise should occur at the scanning interval that noise, is even further reduced, according to the present invention, by scanning, that is by sampling the input means several times before accepting the input as the genuine input. Thus, suppose the input is applied in the form of logic 1. ~ut suppose the noise condition preverts the entry of logical 1 signal when the input is first scanned.
If the scanning cycle is limited in one cycle, this would be picked up and the computer will take the erroneous logical O
signal as the input.

-4(,-10175~5~

'l`ll.i~; I^.lLI)~r r~ o~ oss.i.l~i.li,~y i:; r~nllov(~ V~I~
furtller by scanllillcl thc itlpll~ means a givcn number of timo-;, for e~ample, five timos, allcl the computer is programmcd to determine the consistency, e. g., four out o~ five matching sampled signals match, and then treat the matching signal correct input.
Another advantage of the present scanning and sampling technique is that it is immune to switch debounce problem generally associated with elcctro-mechanical switches used in the control console and elsewhere. ~lectro-mechanical switches open and close very rapialy for a short period of time after activation. This characteristic is known as switch bounce and often complex interface latching circuits are needed to "debounce" the switch to prevent the control system from thinking there were several switch activations instead of one.
By choosing the proper sampling interval with this scanning technique the debounce problem is eliminated withaut the need for complex circuits or switches.
Another feature of this scan technique is that it solves the problem of multiple operation, switch activation or "rollover". If an operator activates more than one switch at the same time, the controls do not know which information to accept first. This scanning technique prevents any information from being accepted by the computer until the operator is activating only one switch at any one time.
Again this is accomplished without complex circuits or interlocking switches.

_~9_ iO75'7~;
~ ~L~ t(, .~ L ~r Ll~ r~
invcntioll, the soEtware is programmcd to includc redundancy in sampling or scanning of the inputs during te S~JITCI~ SC~
routine so that tho machine operation and pa~ticularly, the scanning operation is rendered immune to noise, switch debounce, and rollover problem without the nced for complex switches or interface circuits.
Now with reference to Figures 1~ and 15, some of the SWITCH SCAN routine, in the standby mode, in entering the command or copy run information will be described. Referring to Figure 15 the DIGIT INPUT routine entails the steps of the computer reading digit inputs, such as the copy run information, i. e., the document numbers, the copy numbers, pitch length, etc. into the computer. These digits are entered either to the left (510L) or right (510R) side of the visual means via ENTER LEFT or RIGHT routine using the selection keys 511 and 512 and digit entry keys 501. Whether to enter right or left depends on the specific need of the situation and the way the operator programs the information. For example, the operator may enter the book number on the left and the copy number on the right.
Process Mode Word "PMWRD CONTROL" (Fig. 15) refers to the software routine that enables the computer to operate selected ones of the operative machine components while the rest of the machine is idle. This feature is especially useful in the diagnostic operation. Thus, using this routine, . ~ , . ~ ., . -10'75'7~

the comp~ter can ol~eratc and test selected ones of the proccssmembers such as guillotine knife 160 web drive motor 105, charging means 22 transfer means 81, developer 24, etc. as signified ~y the operator via special instruction keys 533 and 534 so provided.
CONTROL DEVICE routine comprises a software program routine that enables the computer to scan the operative status of the device elements or machine input elements such as interlock, etc. to be sure that they are in an inactivated or reset or energized condition or whatever status is required for operation. For an illustrative routine for this operation, see Figure 20.
SIMPLEX AND DUPLEX SCAN routines includes software instruction routine enabling the computer to scan the mode of operation (i. e., simplex and duplex) instructed by the operator via the keys 523 and 524. The JOG routine entails software instruction routine that enables the operator to jog or advance the paper reel 30 by keying the button 531 for a certain purpose such as getting rid of its splice joint.
In a similar manner, other SWITCH SCAN routines may be programmed into the computer to implement other SWITC~
SCAN function as directed by the operator.
In short the, the SWITC~ SCAN routines described above enable the computer to enter the instructions provided by the operator on the copy run information, copy length, copy run mode, i. e., simplex or duplex and the like and scan the operative status of the machine. (For more specifics see Figures 19 and 20 also).

iO'75';'56 ~ (~(or~ to ~rlo~ r ~lsl~c~t Or ~lc ~ lt il~v(~lltio the software is dcsigned so that, if by mistako two or more input keys are prossed simultaneously, it enables the computcr to recognize this and not to take in thc keyed information until the operator keys in a sequence.
Accordiny to yet another aspect of the invention, the software routines prevent the computer from running the machine until the copy run and other necessary information required for ma~ing a copy run is keyed in by the operator.
When all of the necessary information is keyed properly and entered by the computer then the computer implements the START PRINT SCAN routine and proceeds further.
The START PRINT routine is possible only after copy run or diagnostics or other operational instructions have been scanned and entered into the computer properly and the operator presses START PRINT button 521. This routine directs the computer to execute the next routine, namely, calculation of the TIME LISTS of those of machine process events that require precise timing (Fig. 21). In this routine, the software directs the computer to calculate the time intervals bétween the successive machine events that must occur at precise time positions within each pitch in terms of the clock pulse counts, such as the counts of 230, 450, 650, (Fig. 14) and so on for the exposure, transfer, web cutting jam detection etc. discussed earlier in connection with Figures 13 and 14. Tl-e timing lists derived from this routine is then stored in the event table 205 of the computer memroy (Fig. ~ for subsequent use in the ~XECUTIV~ ~ode.

, , ' '. '~: . , ' ~ J)~ c)~ io~ U1L~ l)r~thc sortwal-e is progralnnlcd to dircct ~ e coml~utcr to enter with thc EX~CUTIVE Modc to start up th~ machinc (I;'ig. 22) and generate control signals to implement rcproduction process steps and monitor the machine operation in successive cycles until the copy run is completed (Figs. 23-26).
The EXECUTIVE mode comprises three main types of operational routines. One routine entails the steps of implementing the machine process events, designated PITCH
EVENTS, El, E2, E3 --- En. This operation requires the computer to generate control signals for the machine process events that require precise timing within each pitch time interval such as flash, web cutting, jam detection, etc. These events occur once every pitch interval when the process zones are fully loaded and are phased in or phased out as the zones are being loaded or unloaded during the start and end of the copy run.
A second routine provides control signals for certain machine process events which do not require precise timing within pitch time intervals but which require proper timing in a real time, although they do not necessarily occur repetitively for every pitch. This subroutine is designated TIME EVENTS, Tl, T2, T3 . . . Tn. These events Tl, T2 . . .
Tn, and include the steps actuating the ~IN DRIVE motor, control-ling the engagement of web 12 relative to photoreceptor belts 20, 20', heating of fuser 33, and the like in a proper sequence and in a real time during operation of the machine. T~le PITCH
and TIME event control signals are generated by the comE~utcr and addressed to the corrcsponding control dcvicc cl~mcllts via the adclrcss dccodcr 241 and the latcll circuits 254a, 245b . . . 254n of Fig. 9.

i()'i~5'7~
A ~ r~llLi~ i r r~ J ~ ) i L~L i rl~3 the machil~c operation status .~nd thc lilic that migl~t bc eonsidercd a housekeeping routinc. This ineludcs the routinc to eheck operator ac~uated interrupt eonditions such as step eommand. It ineludes monitoring operation of sensing eomponents of the machine 5 for ehecking their malfunction status, such as paper supply run out, exeessive fuser temper-ature, and other non-timed events of random nature.
The third routine entails the steps for ena~ling the computer to send out the scanning signals to the various scanning stations that monitor or sense the status of the various dev-iee eontrol elements in the maehine or the switehes in the eontrol eonsole. Upon eompletion of a eopy run, the maehine enters a eyele out routine.
In the eyele out routine, the software instruets the eomputer to go to SWITCH SCAN routine to await for the next eopy run instruetion the operator may provide. If desired, suitable means, sueh as teletype or CRT readout may be provided to display the data on the eopy run eompleted via any suitable DATA DUMP routine.

-5~--'7~

~ oL~r.l~r ~ o~ tl;~ rl~x~
copy run infol^m;ltion wi~ a suitable waiting tim~ p~iod, then tl~e computc~r exccut~s the SWITC~ SCAN mode for the next eopy run. If not, the computer cycles out the machine and the computer.
In operating the computer in the EXECUTIV~ MODE
the software is programmed to follow through EXEC operations.
The EXEC operations eomprise a series of interrupt operations adapted to operate the computer as follows. The computer is programmed to operate in cycles in succession usually in micro or submicro second cycle time. As the computer eyeles through, a PITCH EVENT clock count is stored in counter 209 and checked. If the stored number is not 0, the eounter decrements by one and moves to perform the TIME events, the housekeeping operations, or other events.
The computer operates in cyelieal fashion in this manner and decrements the counter by one after each machine eloek pulse. When the computer finds that the counter being decremented is zero the counter generates and applies the PITCH
event eontrol signal. The next signal is taken from the event table and the piteh in whieh the event oeeurs is ehecked to see if an image is present. If no image is present, the event is ehanged to a non-operation event. The computer then loads this next PITCH event eount into the eounter and moves on to perform other funetions. The foregoing steps are repeated to generate the PITCH event control signals in sueeession as timed by the timing list prepared during the STANDBY mode.

-~5-- ,- -- , - '' ' ' ' ' 11)7S'~S~

~ c~ ral siglli1ical~ features may ~c note~ llcre involvi~ the LXF,C op~rations. Suppose two ~ITCII ovents oeeur at pr~eiscly the same time in the aetual operation of the machine, Sinee the software is programmed to generate PITCH EV~NT signals one at a time in sequence, it is undesirable to generate more than one PITCI~ signals simultaneously, ~ut the conflict presented by this situation is avoided by shifting one of the two events by one or two or more machine elock pulse counts and having the computer generate the PITCH event control signals accordingly. The shifting does not adversely affect the operation of the machine nor the quality of the eopy beeause a shift of a few elock pulses as manifested in the operation or copy is hardly notieeable. This can be readily perceived by noting that one clock pulse shift means 0.01 ineh movement of the belt in the above example and consequently the image.
Another aspect of the software control pertains to the jam detect function operation. The software is so programmed that the eomputer generates PITCH EVE~T eontrol signals to look for the absenee or presenee or both of the eut sheet in the paper path at given times during eaeh piteh time interval. Thus, more speeifieally, the eomputer is programmed to generate a timed eontrol signal and apply it to the sensing means 113 of any suitable type. If paper should be there, no jam oeeurs. Absenee of the paper at this point is sensed as jam eondition and this is signified to the eomputer via a monitor eireuit and the latch 257.

1075'7~

time interval la~er witl~ he samc pitch timc intcrval again to assure that thc cut shect has moved. I~ence a sccond jam detect signal is generated by the computcr as another PITCH
event signal and applied to the monitoring means and sensed.
This time the presence of the paper is detected as the jam condition.
The double check performed in detecting the jam condition is especially useful in the high speed machine where, because of the high throughput capacity, failure to detect the jam timely and promptly can result in a large number of sheets being crumpled and accumulated in the paper path which clog the machine and waste paper.
A typical program for use with aforementioned PDP8/S computer for demonstrating the feasibility of operat ng reproduction machine 5 in an integrated manner to produce copies appears hereinbelow from pages 58 to 107 together with an exemplary copy run readout of the program from pages 111 to 117. For information respecting the definition of the various terms used, one may refer to Digital Equipment Corporation's Sriall Computer Handbook, published in 1967, for the PDP8/S computer.

' 10'7~
CONTROL PROGRAM

~3EGlN.~ TAD` I ~ Si< /GET M128 DCI~ SCR

DCA llR I rE
DCR I IlRIrE /CLEA)~ OPERATE T~LE
ISZ SCR
JMP .-2 l`AD I CONS+I ~GET -4 DCA SCR
IO T~D I CONS~2 ~SHIFT REGISTER START ADDRESS
DCA !~JRITE
DCA I llRITE /CLE~R SHIFT REGISTER
I SZ SCR
JMP . - 2 TAD I .MASK~I ~GET -10 DCA SCR - .
TAD I MAS1~2 /~ATCH TA8LE START QDDRSS
DCA l~JR I TE
DCA I WRITE /CLEAR BATCH TABLE
I Si~ SCR
JMP . .-2 Jl'1P DATA ~GET DATA INI;ORIY.ATION
CONS- 464~
. 463~ . ' MASK> 4633 463~ . . . .
' 463~1 - , . -- DATA, TAD I MASK~2 /BATCI~ TABLE START ADDRESS
; 30 DCA WRITE
TAD NNBR.
DCA TIMER
TAD CHK ~DIGIT EXIT ADDRESS
DCA SIADD
TAD NOI_EN ~OVERFLOl~ EXIT ADDRESS
DCA SIMSK
' JMP I LFCI /GO GET LENGTH
C~K~ CHECK
NOL EN, L EN T
I,ECI J LFC
STOLEN, TAD SETS
DCA LENGTH
NEXT~ TAD CHARI /SET U? EXI T ADDRESS
DCA T I M ER
TAD IJRITE /IS NEXT ENT2Y < 1 TAD I CONSI
- SMA CLA -- Jt`lP Dl ~ ~NO
: T~D NEX I T /DIGIT E;~IT ~DDRESS
DCA S l~ DU
TAD tJRlTE /PUT DIGIT IN TYi'E:-OUT LlST

10'75'7~i A N l) I M A
~t~C
TAD I CON~
DCA I DIGIN
TAD NODIG ~OVERFLO1 EXIT ADDRESS
DCA S1i1SK
JMP I NODIG
CONSI- 4642 `
~643 NEXIT~ STODIG
DIGIN- DIGIT
NODIG- DIGT
DIC- TAD ~IRITE ~IS NEXT ENTRY 10 SPA CLA
JMP LAST ~YES
ISZ FLAG ~NO
JMP I FULL
FULL BBF
LAST- TAD NEXIT ~DIGIT EXIT ADDRESS
DCA SIADD . `
. TAD LDIG ~OVERFLOl~ EXIT ADDRESS
DCA SIMSK
JMP I LDI G
LDIG. DIGLT
LETT~:R TA D SCR
TAD I CONS2~3 ~ IS I T R
SNA CLA
JMP I MID ~YES! START MACHINE
TA D SCR ~NO. IS IT L
TAD I CONS2+1 SNA CLA
JMP NE~ /YES! GET NEI~ LENGT~
TAD SCR ~NO. IS IT C
TAD I CONS2~2 SZA
- . JMP I C~ARl ~NO. ILLEGAL CHARACTER!
TAD OVERC ~YES
DCA SIl`~lSK ~OVERFLO.~ EXIT PDDRESS
TAD CHGNR ~DIGLT E~IT ADDRESS
DCA SIADD
TAD SCR
TLS
TSF

CLA CLL
DCA FLA G
JMP I NMBR
ltI D. M I DDLE
NE .~3. C~ GF~ .
NE~lL. TAD NORIG
DCA T I i`l ER
Ji` lP DA TA + 4 CONS2 46~14 iO'75'7~

46~6 ~S~5 ~ORIG. LC1iG
CHARI CHAR
OVERC. NEXT
CHGNR- C~G
NMBRJ NR
lQ STODIG TAD SETS
DCA I l~RITE ~STORE COPIES IN ~ATCff JMP NEXT
SPEDI G~ TAI) SETS
DCA I SCR~I /STORE NEl1 COPIES IN ~ATCH
Jt~P . N EX T
SPED- SPEDIG
CHG TAD SETS
TAD I MAS1<12 DCA SCR+I ~STORE BATCH ADDRESS
TAD SPED ~DIGIT EXIT ADDRESS
DCA SIADD
TAD NEI`JB
DCA TIMER
TAD S!~TS ~t`~Ut~l~ER IN PROPER LIt~1ITS
-- ~ND I CONS3*1 SZA CLA
JMP I G10 ~NO! ~ 10 TAD SETS

SPA
JM? L I 0 ~LESS T~AN 10 . SZA CLA
JMP I G10 ~GREATER THAN 10 TAD I LDIG1 ~OVERFLOlJ EXIT ADDRESS
DCA SItlSK
. JMP I SIMSK
- L10. CLA CLL
TA D S ETS
. JMP } NXTI

~ 632 LDIGi LDIG
NEXTI NEXT+1 3 C~R~ KS~ ~t.AIT FOR C~ARACTER
J~lP . _ I
KRB ~GET NEXT CHARACTER
DCA SCR
TAD SCR ~DIGIT O.R L ETTER

SPA
JMP CHAR ~NI THE~
1~D I CONS3 St`~A CL~
Jt~P I LT5~ fLETTER

~60-10'7~

TAD FL~ ~DIGIT! IS IT LI~GAL
SZ~
JMP C~AR ~NO
DCA LCTR ~YE5 DCA SE1`S
TA D I C O .~ S
DCA P C TR
J;`1P ZERO ~GET ALL DI GITS
CONS4J ~65!3 LTR. LETTER
1\1R~ DCA LCTR
DCA S E TS
TAD I CONS~ ~I
DCA P C TR
REA D I ~ K S l;`
JMP ._1 DCA SCR
TAD SCR

SP~
JMP CRCI~
: TAD I CONS3 SMA CLA .
Ji~lP RU~O UT
: . ` lAD LClR
SNA CLA-JMP ~ ERO
.. . TAD SCR
PRT~ TL S
TSI;`
JMP .-1 SPA
JMP. GO
SNA CLA
JMP L F
TA D SCR
AN D I CON S3 +2 DGA SCR
TA D S ETS
CLL RTL
TAD SEl S
SZL
JMP I LFCR
RAL
SZL
JMP I LFCR
TAD SCR
SZL
J~lP I LFCR
DCA SETS

I SZ PC~R

10'75'7~

JMP 1~ El~, 1)1 Jl`lP O VE~
CONS5~ 4G51 CRCHK- CLA
TAD SCR

SZA CLA
JMP READI
TAD LCTR
SNA CLA
JMP READI
JMP PRT- I
ZERO. TAD SCR
AI\ID I CONS3~-2 SNA CLA
~o JMP READI
JMP PRT-I
OVER~ TAD I CONS5 - CtA
JMP PRT
. 25 LF- TAD I CONS5-~1 ~IMP PRT
L)~CR~ L FC
RU130 UT~ TA D SCR
TAD I CON55:2 . SZA

JMP O \fER
GO ~ . CLA CLL
l'AD SCR
TAD I CONS5~2 SNA CLA
JMP N R
JMP I SIADD
C~ECK, TAD SETS ~DI GI T ' TAD I CONS5~3 SPA CLA
JMP I SIMSK ~YES! GET ANOTHER
TAD SETS fNO! DIGIT ~17 . TAD I CONS7 SilA CLA
JMP. Xl ~ fNO
X100~ TAD I CONS7+1 ~YES! Xll~i0 DCA SCR
: 50 TAD SETS
CLL RTL
TA D S ETS
RAL
DCA SETS
I SZ SCR
- J~ XI~)+2 l~lAX~ TAD SETS ~DIGIT 'I 70C

10'~5'7~j~

T/'~ D I CON ~ 7 ~2 S~ CL~
JMP I SltlSI~ /NO!GET ANOTHER
TAD SETS ~YES!L)IGIT ~3B~3 TAD I CONS7~5 SPA CLA
JMP I SI~lSK ~NO!GET ANOT~lER
J~lP I GLEN /YES!STORE I T
X10~ TAD SETS ~DIGIT ~ 1 7~1 TA t:) I CON S7 ~3 SMA CLA
Jl`~1P MA~ /NO.
TAD I CONS7+4 ` DCA S CR
J;;P XI(~)0+2 CONS7~ 4655 ~O 46~
4&3S
4~61 471l~
'~5 (~_EN. STOLEN
LCIIG. TAD LENGTH
J~P E3CD
C~IGB~ TAD I SCR~I
JMP E3CI) DCA . E VEN T
CONV~ TAD EVENT

SZL
E~CA E:VENT
CLA
TAD EVENT~I
RAL
DCA E VE:N T+ I
4a ISZ SUEI
I SZ SCR~2 J~P CON V
JMP I B EX I 1' ~I~SX9~. 4627 " 5 ~ 632 460~) 464~5 -TEMP I TE~1P
T~IO U I ~ THO U
5 0 HUNI~ H UN
TEN 1 . TEN
EVENT3. CCRET
GElNRJ Gl t`~'l ~:~5 ~ <~ 6!3 TO;;~S~ fiO I
~CD, I)C~\ EVENT
TAD I CONS7+6 1(~'7~

DCA S C R ~ 2 I SZ SCR ~2 TAD CONS7~7 DCA S Ui3 TA D Tl~O Ul DCA BE~IT
JI~1P COI'~l V- 1 lHOU~TAD EVENT*I
RTL
DCA E VEN T-~ I
TAD I COI~S7+6 DC~ SCR ~2 TP~ D 1~ UN I
DCPI i3EXIT
Jl`~P CO~`~ V
HUN,TAD EVE~T~l TA D TH~AS~
DCR WO R DI
2~ TAD ~ CONS7~6 DCA SCR
TAD TENI
DCA B EX I T
JMP CONV-I
2!i TEN.TAD EVENT~I
RTI.
RTL
. R~
TAD EVENT
3~ TAD I TOMASK ' TAD WORi31 LAST2, Ai~1D I MASX99 CLL RTR
RT~ .
iRTR
Jl~1S I TEMP I
- TAD WORDI
ANl) I MASK99~1 , -JMS I TEMP i TA D l~!O R D2 DCA I~'ORDI
D CA ~;JO R D2 TAD ~IORDI
SZA

TAD I CONS7~4 JMS I TEMP I
TAD FLAG
AN D I ~IA Sl<" ~ ~2 SNA CL/~
J,`;P I G ETNR
- 55 J.'lP I E Vi_;`! T3 COMi'UTJ TAD I ~ \SI~*3 /DIi F Ti~F~LE STt~RTING Ar)l)RESS
DCA Wl~ I TE
L~S fGET MQDE Oi Ol'ERATION
.

10'75'7~

DCA S E l^S
T~D SETS
C I l'\
DCA SCR
TRD CONS~3 ~GET START ~ NUME~ER
S ~P
IAC
I SZ SC~
- J,`~IP .-2 DC~ SCR
TAD I SC~
DCA SCR l l TAD SC5~1 AND T MASK3-~4 CLL RTR
RTR
Rl'R
TAD I CONS~3~4 DCA READ ~START OF INPUT TABLE
TAD SCP~I
AND I MAS)<3~2 DCA P C TR ~ N UME3 ER O F I NP U TS
TAD SETS
ANl:) I MASK3 /DUPLEX OR SIMPLEX ,,~2 S ZA CLA
J;`lP' FLASH ~YES! f~Ot~lPUTE FLASH '~2 TADPCTR ~NO
' ' C IA
DCAL C T~
JMPAGA IN
MIDDLE. TADLENGTIl T~D I CONS~6 ' SNI CLA
SKP
IA~
.I AC
CMA
DCA HOl_ D
TAD I MASK3~5 ~Cl~ECK MI DDLE OF-RUN FLAG
P.ND FLAG
SNA CLA
JMP CO ;'1P UT
. 45 - TR D FLA G
TAD I MASK3 ~6 ~SET RU,``1 FLAG
DCA FLA G
l-~S
TAD I CONS~3~7 S~
S~P
JMP I S 1 ~lPL I
S ~Ç\ CLA
;5 J~``!P I DUI~LE~
Jt`i;' I S I t`lPL2 SIMPLI > SIi!PI
SIMPL2, SIMP2 10'75';'~

DUPLE~. DUi l J~P . - 1 DCA SCR
TAD SCR

SNA CLA
JMP I NOC;OO D

DCA P C TR
DCA L C TR
DCA SETS
J;~P I NORI
NO R I ~ R EQ Dl + 4 NO GOO DJ SA VE
FLASH TAD PCTR
IAC
DCA P C TR
.TAD PCTR
. - CIA
DCA LCTR
TAD I CONS~+2 ~START OF INPUT TAE3LE
DCA SCR
TAD I CONS~3 DCA SCR ~1 CLL
TAD I MAS1~3 I ~COMMON LENGTH
TAD LENGTI~
SNL /RETARD OR ADVANCE
` 35 JMP RETA2D ~RETARD
CLL - ~ADVANCE
TA D SCR ~ I ~A D D I N G T I M E -DCA SCR~I
SZL ~ I S Tl IE:RE A CARRY
. IAC ~YES
TAD SCR ~NO
AND I MASK3+2 TAD I MASK3+3 DCA SCR
. 45 J;~lP AGAIN+4 RETARD- TAD . SCR~I ~SU8TRACTING TIME

SNL ~IS THERE A E30RRO.l TAD I CONS~3t 5 ~YES! SU8TRACT ONE
J.`1P R ETAR D- S ~NO
CONS8 . 4 G 62 4 6 ~) 5~01 ~67~
4~35 1~)'7~'7~

tU\S~(3, ~6l ~
~G7 ~63 ~6t 7 ~G3~
AG~IN, TAV I READ
DCA SCR
TAD I READ
DCA SCR f I
TAD SCR
AIYD I ~lASK3+2 DCA SCR~2 TAD SCR
AND I ~lAS.K3~4 DCA E VEN T
DCA ACC
TA D L Ei`I G TH
C I A
DCA SCR
CLL
START- TAD SCF<~l -TAD . SCR
ISZ ACC
. SNL
J~P . ~3 CLL
Jl~lP ST~RT~I
- DCA SCR~1 TAD SCR~2 SNA
. 35 JMP STORE

DCA SCR ~2 TAD SCR~I
Jt5P START~5 STOR E. TA D SC R ~ I
TAD LENGTH
- . DCA I ~R î TE
PITCH, TAD I CONS9~l DCA SCR~I
TA D I CON S9 ~2 DCA SCR
TAD ACC
TA D SCR
S~lA SZ~
J~lP O K
DCA A CC
TAD SCR~. I
TA 1) I CON $9 ~3 DCA SCR~I
TA D r.cc ' SNA

10'~5'~

Jt`lP O~(~S
DCA ~CC
TAD SCR
C I A
TI~D ACC
DCA A CC
TAD SCR
TAD I CO~S9+4 r~cl~ SCR
J~lP P ITC~4 CJK. TA D I CON S9 TAD SCR+I
TAD EVENT
DCA I IJR I TE
J;~1P CII~C~I
TAD I CONS9~5 TAD SCR~I
TAD EVENT
. JMP OK~3 Cl{ECKI J ISZ LCTR
JMP I AGIN
JMP SO R T
CONS9. 4635 46~ 6 ~467S

q672 AGIN~ AGAIN
SORT, CL.L
TAD I CON Sl O
DCA READ
TAD I R~D
DCA SCR
TAD I READ
DCA SCR ~ l TAD SCR+l AND I MASK5+1 SZA
JMP Sl /SIMPLEX ~1 TAD LENGT)~ /SI~iPLEX /,2 OR DUPLEX
T~D I CONSI !~ CO~ ON LENGT~
SNL
JMP Fl ~FLASH fl I LAST
Sl ~ CLA CLL ~FLAS~ fl2 LAST
TA D SCR
IAC
DCA I WR I TE
TAD SCR+I
AND I CO~JSI~+2 TAD I CONS1!3 ~3 DCA I ~JR I T5~ .
JMP R ES
Fl ~ CLI\ CLL
.

--6~--1075'7~

T~\ D Z
l)CA E VEN T
TAI) i R E:AD
DCA SCR~2 `.
TAD SCR+2 ~IS T~ERE A FLAS~
AND I M/~S~5 /~ND I I~ASKS~I
SNA CLA
JMP Sl /NO ! USE FLASH ~2 TAD EVENT
DCA SCR
TQD SCR~2 DCA SCR ~1 t1i~1P SI
CO~SI ~ 6fi~

~634 MASK5~4633 .
4~05 RES, TAD PCTR
CIA
DCA LCTR
DCA FLA G
2e TAD I CONS10 DCA R EA D
T.9D I CONSI ~5 DCA ` ~lR I TE
TAD I REQD
DCA SCR f FIRST RESI DUE
Tl~D I READ

MORE. TAD I READ
DCA SCR~I ~NEXT RESIDUE
TAD I READ
DCA E VEN T+ I
TAD SCR+I
Cl~
TAD SCR JFIRST - SECOND RESI DUE
SPA SNA
J;`1. ENTRY
CLA CLL
TA D SCR
DCA SCR ~2 TAD SCR+l DC~ SCR
TAD SCR+2 DCA SCR~I
TAD EVENT
DCA SCR~ 2 TQD EVENT+I
DCA EVI:NT
: 55 TA D SCR ~2 DC~ E VEN T~ I
ISZ FLAG

-, 1~J'75'7~j ENTRY. CL~ CLL
TAD ,SCR
DCA I lJRITE
TAD EVENT
DCA I llRlTE
TAD SCR~I
DC~ SC.R
TAD EVENT~I
DCA EVENT
ISZ LCTR
JMP I MOREI
TAD SCR
DCA I ~!RITE
TAD EVENT
DCA I I~JRITE
'T~D . FLAG
SNA CLA
J~P RESIII /C~ECK SIMULTANEOUS EVENTS
. , JMP I RESI /SORT AGAIN
MOREI, MORE -RESI~ RES
TAD SIMSK ~HAS EI~D PITC~ BEEN ENTERED
SNA CLA
2~ JMP SETUP ~YES! SKIP
TAD LENGTH ~NO! ENTER EilD,PITC~
DCA I WRIT~. .
~QD CONSIl~I
DCA I WR-ITE, DCA SIMSK
TAD PCTR
lAC
DCA PCTR
SETUP. TAD I CONSII
DCA READ
TAD I CONSII
DCA ~IRITE
- TAD PCTR
' CIA
DCA LCTR
: TAD I READ
DCA SCR
TAD I READ
DCA EVENT
SI~UL~ TAD I READ
; DCA SCR~
TAD I READ
~ 50 DCA EVENT~I
: TAD SCR ~C~IECK RESIDUES
ClA
T~D SCR~I ' SZA ~ARE RESIDUES EOU~L
J;lP I l!RITEl /NO! IIE'RE IN LUCI~
TAD T!~Y? ~YES! DO SQ.lE C)!ECKING
DCA ~JO~i1 /E~ DI)RI-S~ ENTERED
TAD EVENT~I

10'7S'~

A N D I C O ~ 2 J~lP TRY
COI~I S I I ~ ~ 6 ~
230a ~633 TRY2, DONE
llR 1 TE l ~ EN TER
TRY~ TAD I GONSI 1+2 ~IS IT FLASI~
SNA
J~lP Y ES
TAD I CONSl I-l2 /NO! IS IT l;LAS~ fl2 SNA
JMP Y ES
TAD I CONSI 1-~2 /NO! IS IT l;`ILM AD`~NCE
SNA
JMP Y ES
TAD I i1ASK6 ~NO! IS IT PAPER CUT
SNA
:2 0 JMP Y ES
TAD MASK6+1 /NO! IS IT END PITCH
SNA CLA
YES- IAC
J~IP I . NORM ~NO! C~ANGE RESiDU
2.ri MAS1<6- 4~77 64a~3 ~ONE, SNA CLA ~CAN l'lE CHANGE ff~2 JMP INCRN ~YES
TAD TRYI ~NO ! C~IECI< ~F I
DCA NOFCM ' TAD EVE:NT
AND I CONSI 1~2 J~lp TRY
TRYI . DONEI
EXIT2, EXITA
DONEI J SNA CLA ~CAN l`~E C5~A~;IGE /t I
JMP INCRA ~YES
JMP I WRITEI /NO! NOR~1AL ~1RITE
INC~N, TAD SCR~I' .
DCA MOD /GET RESIDUE ~t2 TA D EVEN T~ I -DCA ACC ~GET ~VENT#2 TAD EXITI
DCA NOR~l ~EXIT ADDRESS EN1-ERED
JMP I TOO E~A D
EXITI ~ EXITN
TOO BA D C H GR ES
EXITN. TAD MOD
DCA SCR~l /ENTER NE~ ESIDUE
TAD ACC
DCA EVEi`~T*I iENTER EVE~T
JilP . I llR I TEI
Ii`JC~A, TAD SCR
DCA NO D ~ GET ~ ES I DUE O l TAD EVE;\IT
DCA ACC ~GET EVENT Ol .

10'75';~

TAD E:~IT2 DCA ~OR~ /EX~IT Al)D~ESS Ei~TERED
JMP C~(GRES
WR I T1~2 . EN rER
EXITAJ T~D ~OD
DCA SCR ~ENTER NElJ RESI DUE
TAD P~CC
DCA E VEN T ~ EN TER E VEN T
JMP I ~`IR I TE2 CHGRES. IAC
DCA FLAG ~SET CHP.NGE FLAG
TAD LENGTH
C I A
TAD MOD ~IS RESIDUE ~ LENGT~I
S~A
JMP - LUCKY ~NO !
DCA MOD fYES~ CHEC~ PITCH ADDRESS
TAD ACC

TAD CONS12 ~IS POSITION ~ 5 SZA
JMP LUCKY1 ~NO!
TAD ACC ~YES!
2~ AND MASK7-~1 TAD I CONS12*1 - DCA ACC
SKP
LUCI<Y1~ I SZ ACC-LUCKY. ISZ MOD
CLA CLL
JMP I ~OR~I . , MAS1~7, 4625 461 ~3 EN TER . CL A CLL
TA D SCR
DCA I ~R I TE
TAD . EVENT . .
DCA I WR I TE
TAI~ SCR+I
DCA SCR
TAD . EVENT-~I
DCA E VEN T
ISZ LCTR
J~lP I SIM-ILI
TAD SCR
DCA I l`!R I TE
TAI~ EVENT
DC1~ I ~`JRI TE
TAI) FLAG
SNA CLA
Jt~
JMP I O VER I
SIMUL I S IMUL

--~2--10'75';'5~j O~EI~t ~ES
T~D I CON~30 DC~ ~.E~D

DCA lii~ITE
TAD PCTR
CIA
DCA LCTR
TAD I READ
DCA SCR
TAD I Rr~D
DCA EVENT
TAD SCR
DCA I I~RITE
TAD EVENT
DCA I 1~1~ I T
DIFF TAD I READ
DCA SC~+l TAD I READ
DCA E: ~1l`1 T
TAD SCR.
;:IA
TAD SCR~I .
DCA I W~ITE
TAD EVENT
DCA I IJRIIE
TAD SCR+I
DCA SCR
ISZ LCTR
JMP DIFF
J~IP R~
CONS30~ 464!3 ~674 RUN CLA CLL
TAD SETS /liHICH FLASH IS FIRST
AND I MASK3~ -SNA CLA
JMP I SIMl ~FLASH 1! l~O FLASH C2 : TAD SETS : .
AND I MAS~3(3+1 SNA CLA
J~MP I SIM2 ~FLASH 2! NO FlAS~
JMP I DUP ~DON T I~N01~ CHEC~ LENGTH
TAD LENGTH
TAD I CONS31 ~CO~MON LENGTH
SZL
JilP FL1 FL~- CLA
TAD I CONS31~ 02C3 DCA FLA G
JlP LOOI~
FLI CLA
lAD I CONS31~2 ~-~10d ~ ncA EL~G
~lP LOO
' -- --.

10~7S'7S~
.
SIt11 SI~`lP1 SIM2. S1MP2 DUP DUPL
CO~S31 4667 S~3~ 4fi 1 2 LOOK TAD I CONS30 /DI FF TA~LE START ADD.~ESS
DCA R EA D
TAD I R::AD
CLA
TAD I RE/~D
AND I CONS31 +2 ~CLEAR PlTC~ INFO
TAD FLAG ~SUE3TRACT EVENT NUME~t_R
SZA
J~tP LOOK+2. ~NO GOOD! GET NEXT ONE
DCA FLAG ~CLEAR FLAG
TAD ~EAD ~THIS IS IT?
DCA SCR
TA D I SCR
DCA SCR
TA D SCR
AND I tlASK32 ~EXTRACT REGISTER ADDRESS
TAD I CONS33 ~SUE3TRACT ONE
SMA
. SKP
JMP C1 ~CONDITION ONE

JMP C2 ~CONDITION TWO
TAD SCR ~DIFFICULT CONDITION

. CLL RAR
RTR

DCA I SIADD /SHIFT REGISTER ADDRESS
TAD CONS32+1 DCA SIMSK+1 ~FIRST M~SK ADDR~:SS
TAD CON S32 ~2 DCA SIMS.K ~SECOND MASK ADDRESS
TAD FLAG /SET UP SPECIAL FLP G
TAD I CONS32~3 DCA FLA G
JMP INSERT
CONS32~ 4676 46~2 C1 CLA CLL /SET Ui ADDt~ESS A`JD -tAS <
TA D SCR
AND I M~SK
RAR
TR

.
.
, . : . , iO'75'~

TAI) 1 CONS33 DCA Sl.~l)n ~SlllFT R~GIS1-Ll~ ADVRESS
TAD CONS33~1 DCA S INSl~ /il,'~Sl< ADDRESS
TQ r~ co~ S33 +2 J~ O~< .
C2 J CLA CLL / r~ SY FLA S~ PO S I T l ON
TAD SCR
A~1 D 1 MASK3 1 RAR
RTR

DCA SIADD /SI~IFT RE(~ISTER ADDRESS
TA D SCR
AND I t1ASI<32 CIA
IAC
~CA SCR~ I
TAD C(3NS33+3 DCA SIilSl~
I SZ SCR~ l SI~P '.
Ji'l? NSERT
.I SZ S IMSl~
J~1P - 4 INSERTJ T~D SCR ~SET PITCH CODE INSERTION
At`~D I MASK32 DCA SCR~1 TAD CCN S33 ~ 4 I SZ SCR~
SKP
. ~lMp AO K
TAD I CONS33~ 2 ~1:`1P - 4 CONS33~ 4635 ~632 ~1 2 M~ SK3 2 4 62 5 AOK, DCA NORM
. TA D I CON S3 4 DC.A R ~A D
AOKI. TAD I READ
CLA CLL
SO TAD I R~AD
Arl D I tlA SK33 TA D I CON S3 4~ I
SZA
Jt`lP ~O~<I
5 5 TA D r~ ~31~ D
DCA SCR
T-^~D I SCR
DCA SCR

.~ , 10'7~'7~

TA D SCR
i~TR
R~ r~
AND I l`l~SJ~3'' T~D I CONS32 DCA ~lA DD
T~ D SCR
AND I i7/`~SK32 TRD I ~JASK33+l SNA
JMP + 3 S~A CLA
J,`~1P ~0~<2 TQD SCR
~N D I l`lASK32 CMA
DCA SCR~l TAD I CONS34~2 Si<P
CLL RTR
ISZ SC~fl -JMP .-2 2 DCA ~0 D
JMP FIN
CONS34~ 4S40 46~1 :
~30 4613 i'lASK33J 4633 ~36 AOK2~ CLA CLL
TA D I ~0 NS34~3 TA D FLA G
DCA FLA~
TA D I CON S34~3 DCA MO D
FIN. TAD I MASK33~1 DCA LCTR
TAD I CONS35~2 DCA PCTR
- TAD I CONS35-!-3 DCA PRADD
TAD I CONS35~3 DCA LDADD
TAD I ~lASK3~l+3 DCA I NA D D
JI~P I MCHKI
NOI~E~1, DCR FLAG
TAD I MASI(34~1 DCA S~TS
Tl'~ D I ~ 'A S J<3 ~l +2 ~5 DCA i~:r~
Tr'~ D I R i-A L) Si\'~
Jl`lP +7 _7(;--.

iO'~5~

C I ~\
DCI~ S E TS
T/~ D R 1~ D
AN D I D,'li~S~
DCA tiO I)E
JilP INST-3 I SZ SETS
J;~P NO:lEM+5 JMP I NOCOP
BilASK~r 4632 READER- DDIi~-~2 TAD I MASK34~3 DCA ODD /GET PAPER CUTTER MRSK
. TAD I ODD
I~`1ST~ CLA
TAD I ODD
AN D I MASI<3 4~ 4 TAD INST
SZA
- J;lP INST- I
TAD ODD
LJCA SCR
TAD I SCR
I:)CA SCR
` TAD SCR
RTR
t~AR
AND I MASK34~5 DCA . PCADD
?AD SCR
AND I MASK34~5 T~D MAS.'~34~6 SMA CLA
JMP SP EC
TAD SCR
AND I MASK34+5 IAC
CMA
DCA SCR
SKP
CLL RTR
TAD 1 MASK34t-7 - .45 I SZ SCR
J~P - 3 DCA P C~ SK
. JMP l 4 ` 50 SPEC.~. ISZ PCADD
TAD I i1ASK3~J+7 rAD I MA S-~3~+3 DC A ODD /FIi`~D I;'`IVE~T i`1ASi<
TAD I ODD
CLA
TAD I ODD
AND I MASl<34+4 ~075'7~

SZA
JMP SPEC~5 T~D ODD
DCA SCR
TAD I SCR
DCA SCR
TA D SCR
RTR
RAR
AN D I MASK3 4+ S
DCA I VA DD
TA D . SCR
~ND I MASK34~5 Ct~lA
DCA SCR
SKP
CLL RTR
;~ TAD I MASK34~7 I SZ SCR
J~IP . - 3 DCA I VMSK
TAD I t~AS~(3 4+2 DCA ODD
ME~:M . . TC I;' KCC
JMP I READER
MCHKl ~ MCI~K
MASK34. 46!30 ~633 ~1 4 CONS35. 67C0 ~q676 4636 .

NOCOP ~ N COP
LOAD~ CLA CLL
` 45 TAD I INADD ~GET DIFFERENTIAL
DCA I LDADD ~PUT IT IN TAE3LE
.TAD I INADD /GET EVENT
DCA SCR
TAD SCR /GET ~IT LOCATION
A;`ID I t`lASK3.'l+5 C~
DCA SCR+I
TAD . SCR / GET Sll I FT REGI STER ~DDRESS
RAR
RTR
AND 1 MASK34~5 TAD I CONS35~l 7 8 .

.. . . ~ .

lO'î~5';'~i DCA S~R~2 ~GOT IT
TA D I SCI~ ~2 / GET S~1 I F r REG I STER
S~
~TL /GET P I TC1l CODE
- I SZ SC~ DO lJE HA VE I T
J;-1P .-2 /NO! TRY AGAIN
CLL R TL
RAL
AND I ~AS~10l1 DCA SCR+2 /SAVE IT
TAD SC~ ~GT VALIDITY CODE
AND ~ AS1<1 B~2 CLL RTR
15' R TR
~TR
TAD I CONS1 6+1 DCA SCR; 1 TAD I SCR~1 /GOT IT
SKP
VAL I D J ~A R . / I S E VEN T VAL I D
I SZ SCR+2 J;.;p o~2 AND I MASK10~3 . 25 - SNA
J~ 3 CLA CLL
T~.;) SCR
DCA I LDADD jLOAD IT 1N TA8LE
TAD SCR .
TAD CONS1 6~2 /IS IT TI~lE TO SHIFT
SNA CLA
JI~P S~I FT
35: I SZ LCTR /END OF TA~LE
SKP /NO
JMP RESET /YES
~lAIT. TAD LCTR ~IS ANOTHER ENTRY NEEDED
CIA , TAD PCTR
SZA
- J~1P I LOADI ~YES ! DO I T
J;1P I C:O UN Tl ~NO ! 11A I T
. 45 RESET- TAD I CONSI 6~3 DCA, LCTR
TAD I CONSI 6+4 DCA LDADD
J~:P ~lAIT
~ 50 CONSI 6J 46?6 : ~ 470l . 5S!~l ~70'J
MAS;<I~. ~625 10'~57~

~Sl 3 COUNTI ~ COIJ:`lT
J.~C~1, J~C~
LOt~D1 ~ LOAD
SVC- T(~D I PR/~DD ~GET DI FFERENTIAL
DC~ T I 1`1 ER
TI~D I P~ADD /GET EVENT
AND I i1ASK1()~2 ~CLEAR PITCH lNFOR;1~TlON
CLL R TR
RTR
RTR
TAD I CONSI 7 /ADD E31~SE ADD2ESS
DCA EVEN T
JMP I EVENT ~PERFO~<M EVENT
El\l~l. ISZ PCTF~ ~END OF TA8LE
JMP RE:TURN ~NO ! CONTINUE
TAD 1 CONS1 6+3 DCA PCTR
. TAD I CONSl 6~4 DCA PRADD
PETUF~N. TCF
J;lP WA I T
INT- KRB
TAD CONS17~1 ~IS TZ~IS STOP SET
SNA
JMP `S
TP.D CONS17~2 ~IS THI5 END FRAME
SNA
JMP INV
: TAD I CONS1 713 ~IS T~IIS STOP FRAME
SNA
JMP S F
TAD I CONSl 6~3 ~IS THIS JAM
SNA
JMP I JhM 1 TAD CONS17 t6 ~IS THIS EMERGENCY
SNA
. JMP I PhN I C 1 TAD CONS17~2 ~IS THIS SPLICE
SNA CLA
JMP SPL

JAM 1. JAM
46!~1 6 46~17 46~1 ~5 7772 - P~NICI . P,~NIC
INV, T-~D I CONS17 TAD FLAG

10'75~

.
t)CA FLA G
Ji`lP l ~O(~o Sf'L, T~D I CONSI 7~1 TAD I CON.';l 7 ~5 5 DCA I CONSI 7~5 JMP I 0~)(30 SS~ TAD I JAI~t +l TA D FLA G
DC~ FLA G
JMP
SF. TAD I JAMI ~2 Jl'lP . - 4 SHIFT~ TAD FLAG
ANV I MP.SKI ~ +3 SNA CLA
J~lP I JACKI
TAD ~OD
CLL RTR
RAR
DCA MO D
TAD MADD
IAC
DCA MRDD
. JMP . +4 .: ~CK~ TAD MOD
CLL RTR
- DCA MO D
TA D I CO i`J S I ~ s2 DCA ' INADD
TAD FLAG ~ IS SPECIAL FLAG SET
AND I MASKI l *l SNA CLA
JMP EASY /NO
TAD SIADD ~IS SPLICE PRESENT
TAD I CONSI 9*3 DCA SCR
TA D I SCR
AND I SIMSI~
SZP. CLA
JMP MO VE ~Y~:S ! S~I I FT
E9SY~ TAD I SIADD
AND I SIMSK
SZA CLA ~NO ! CHECK RUN
JMP MO VE ~ 'YES ! SH I FT
TAD FLAG ~IS RUN FLAG SET
RN D I MA SK I 1 ~2 SNA CLA
J~`~7P 13A TCH I
TAD I NOR~t /NOR~lAL PITC)t CODE
TAD I SIADD
DCA I SIADD
tlOVE, TAD I COi~S~
~C
DCA SCR
TA D CON S 1 9 + 5 1~7S'~

DCA SCR ~ t TAD SCR`~l l`t\D I CONSl ~+3 DC A S C R +2 TAD I SCR-~l AND I CONSI 9~1 CLL R T~
DCA 1 SCR ~ l TAI) I SCR~2 AND 1 MAS~CI I +3 RTR
RPR
TAD I SCR~I -DCA I SCR ~
TAD SCR~'2 DCA S C R ~ I
ISZ . SCR
JMP MO VE: S
TAD I SCR~I
AND I CONSI 9~4 RTR
DCA I SCR~I
JMP I ~1A I TI
BATCH. TAD SCR~3 SZA CLA
JMP MO VE:
Tf~D M ODE
TAD CONSI 9 ~6 SMA CLA
JMP EN DR UN
~S~. MODE
TAD I READ
SN~
Jt~lP BATCH~3 CIA
DCA S~ T S
TAD 1 CONSI 9-~4 IAC
DCA SCR+3 JMP MO VE
CONSI 9- 46~l ~3177 MA Sl~ I I 4 6 1 3 ;O 4S~2 46~
4~`21 j 5 ~!A I T I ~ I r- 3 B~TCill, Tf~ SKl I ~-4 AN D FLA G

1075~

S~l~ CLA
Ji`lP ~ TCi I
TtD SETS
SNA CLA
JMP Bl~ l C~ ~3 JMP MO VE
ENDRU;`1. TAD I ~1ASK1 1~'1 AN D FLA G
SNA
JMP MO VE
CMA
AND FLAG
DCA 1;`1_~ G
JMP MO VE
MCH1<~TA D MO D
DCA Pl`10 D
TAD tlADD
DCA P M~ DD
TAD I MASI<I I ~4 Al`lD FLAG
SNA
JMP . + 5 . Ct1A
AND FLAG

JMP I MEMI
T~ D FLA G
TAD I MAS."I 1+2 JkiP I NOMEi~ll ` 30 MEtll ~ MEM
NO MEM 1 ~ N OM EM
COUNT. TAD TIMER
CMA
DCA TIM5~:R
ION
ISZ TIMER
JMP . _ 1 IOF
4~ JMP I G01, J~lP I E1 . JMP I E2 , 45 JMP I E:~

: JMP I E 6 JMP I E I
JMP I El I
.I,~P I E12 JMP I El 3 - JMP I El 4 .~

~, , . . - . .

10'757~i Ji~lP I ElS
J:~lf~ I t'l 6 J~)P I F:l 7 JNP I El ~3 Jl~lP I El 9 E0~ EV~3 E l J E V l E2> EV2 ..
E3~ EV3 E4~ EV~
E5~ EV5 E 6- EV~

E8~ E:V8 E9~ E:V9 El~ EVI0 EI l EVI I
El2, EVl2 El 3~ EVI 3 El 4- EVI 4 EI 5~ EVI 5 El 6- EVI 6 El 7J ElJI 7 E1~3~ EVI8 El 9- EVt 9 EV0 J J;~IP '. E VE0 EVE0 ~ EN D
EVI .~ TAD I t~ASI~I 2 AND FLAG
SN(~ CLA
Ji`lP I EVE0 J~lS I EV~l 1~56l 4 1 13 ~!~

6 1 4S
43~)0 SKl 2~ 46~)0 cot~ls2a, 4~ 4 4$76 EVEI > 0200 EV2~ TAD I t~SKl 2 AND FLAG
SNA CLA
Jt~lP I EVE0 JMS I EV5~1 6 ~ 4 Q l ~3 62~S
43nQ
J;~1P I E VF!~
EV3, ISZ CCTR

.

1~)'7S7~

TAD I ~ SKl2~1 ~FND F5~AME PRI.JL-~IT
~ND FLAG
SZ~
J;lP EVE3 ~YESt C~EC~ CO~IF,S
JMS I EVEI /NO! ADV~NCE FIL;l 4~1 03~5 4~00 JMP I FORCH~( FORCHK, FORREV
EVE3, CMA
AND FLAG ~CLER.r~ END FRAME FLAG

DCA FLAG /SET ~NHI81T FLAG
. TAD SETS
IAC
CIA
. JMP I SHOW
SHO11. BCD
CH~DR~ C~5GDIR
CCRET- ISZ SETS /8ATCH COMPL~TE
JMP I CHGDR ~NO! CHANGE FILM DIRECTION
TAD I MASK22 /YES! KILL RUN FLAG
Ct~lA
AND FLAG
DCA FLAG-J~S I EVEI ~SLE~1 FILM

35 ~527 1~14 430~

FO.~D~, FORDIR
EV4~ JMS I EVEI
. 2320 1 ~1 1 ' ~5~3 43~
~ . JM? I EVE0 `- - EV5, JMS I EVEI
20~1 2~5 22~
22~5 iO'~$'7~

01~3 ~5~5 ~3~0 JMP I COROF
COROF- COROFI
ICCi~. TAD IVADD
Cl~
DCA EVENT
TAD I ~lAS1<13+1 DCA EVENï~
ZEBRA. TAD I EVENr~l SZA

ISZ EVr N T+l ISZ EVEi'JT
- JMP ZEaRA
TAD IVADD
TAD I MAS.<13~1 DCA EVENT
TAD I EVENT
AND IVMS~
- EVEN6, 5NA CLA
J~IP I O FF 1 /YES 1 SHUT~ DO ~J;`1 JMP I EVE6 /NO! RETURN
EV6~ TAD I MAS.~13 /RUN FLAG CHECK
AND FLA~
SZA
~NP . E~E5 ~RU~ FLAG ~P! CUT PAPER
TAD PCADD /NO RUN FLAG! CLEAR CHECKS
CIA
DCA EVE~JT
TAD I MASK13~1 - DCA EV~NT~I
TAD I EVENr+1 ' SZ/~ -JMP EVES ~NO! CUT PAPER
ISZ EVENT~l ISZ EVENT
J~P -5 TAD PCADD
TAD I MAS~13~}
DCA EVENT
TAD I EVENT
AND PC~lSK
SNA CLA
JM? I EVEN5 2~5 2~
~325 2~5 43~0 J~lP I EVE6 EVE6, END

i()'75';'~

EVErJ5~ EV5 5l<~ 3. .~

0 Fl: I , 0 ';Et', I 11~
EV7, J;1$ I EVE7 01~2 2~4 `10 1716 ~5~3 0~0 J;1r' I EVE6 FV~J J~S I EVE7 61~)2 1 7~ 6 0 6~5 43~ .

EV9- J;~IS I EVE7 ~ ' 1 6 26g~ -4543 : -00~0 JMr~ I EVE6 E1JI 0, J~S I EVE7 1:~01 6 1 ~,~
2~22 2S~5 0~00 EV11~ J1Y S I EVE7 61 ~!~
~6~1 ~423 0S~5 43~

EVI 2. JMS I EVE7 - 50 12~1 62~;~
2 ~2 2 ;5 2~35 4 5 ~3 ~a _~37 10'7S'75~
EV13~ JMS I E\Jt.7 1 2~ 1 6~
~6al I '~23 43~3~
J;-lP I E VE 6 EVl 4~ JMS I EVE7 12~11 - 1 5~0 63~`.0 2 '~22 ~543 0~0~ -J;`1P I EVE:6 EVI 5~ JMS I B
S2~l 63'`~1 ~6!a~
1423 ~ -~1545 JMP I A
EVE I 6~ JM S I . B
. 2422 40~1 ~0 1 7 I 6 ~1S
430~
JMP I A
EVEI 7. JMS I E~

. 0622 40~ J
1 6~5 43~30 JMP I A

TAD I MASKI 4~3 DCA C C T~
CLL
JMP I A
- E:VI 9~ TAD I MAS.<I 4 ~CI~ECK INHIBIT FLAG
AN D FLA G
SZ~
JMP I Nl~
TAn FL-'~G
AND I ~lASKI 4~1 /CIIECK E:~T.~A SI~IFT FL.'\G
SNA CLA

.

10'~575~
J;~' YO U
Tf\D MOD
CLL RAL
RTL
S I)C~ ~10 D
TAD MADD
TAD I ~1~5K1 ~3 DCA ~lA D D
Jl`5P + 4 YOU. TAD MOD
CLL RTL
l)CA MO D
TAD I ~1ASK1 4~2 ~RUN I;'LAG SET
AND l;`LAG
SZA
J;`1P F
JMP I MAYBEI
~YB E I . ~lA YE3 E
20SZS> ISZ SCR~3 JMP F
P I O D D S E T -QDDSET. O CCHK2-~1 0i~)0 TAD I MAS~l 4+2 'rAD FLAG
- DCA FLA G
F. J~1 S I B
~5l 6 044~) .
20 l l 2~03 ~3 43 ~00~ .
JMP I PAP ER l PAP ER I P AP ER
INI 1. C~lA ~CL EhR I Nl~ I B I T FLA G
AN D FLAG
DCA FLA G
JMP I XYZl ~GO CHECK RUN & STOP FLAGS
X~ZI i XYZ
ODDCHK. TAD I ODD ~C~ECK FOR ODD COPIES
~ 45AND I MASKI 4~1 ; S ZA CL~
- J;lP C
TAD I MADD /EVEN ! ENTER INVERT COI:)E
T~ D t~O D
DCA I ;'lADD
CJ TAD I MASK1 4~1 AND FLAG
SNA CLA
J;'lP YOU
T~D MOD
CLL RAL
RTL

10'~S'7~
DCA ~10 1) T~V MADD
TA D I t ;A S i~ 3 DC~ M~\ DD
J;~lp . ~ 4 YOUl ~ . TAD ~tOD
CLL RTL
DCA MOD
Tl\D ~lOD /CLEAR SllIFT REGISTER
C I A
Ci lA
AND I MADD
DCA I MADD
JMP F
D~ TAD I MADD
TA D t''O D
DCA I ~DD
JMP E VI 9 ~ 4 20 t~SKl 4~ ~lo04 -46~30 A. EN D
B. . 0200 OFF'.... JMS I Ps 1 50 ~ -~31~
~ I 1 ', ~3540 23~ 0 ~6~6 56~0 . 22~)5 ~324 ~Jl22 2 ~154 4!~)20 22~1 5 ~ ~2 03~ 7 GOODIE~ TAD I KOOK
I~CA READ- I
l`AD I KGOl<~l -,5 DCA REI~D-2 DC~ I REAi~
IS~ REi~D-2 Ji~P .-2 _no_ 10~575~;

HLT
J;~lP I ~3EGGAR
1~00)~ 6 ~
'~633 B E (; C./~ B E G I N
TYP E. 0 ~0 0 X, CHAR
DI GT. J;~IS I TYPE
a l IÇ)4!) DI GI T, 40 61 . ~720 ~ 40 JMP LFC~4 DI GLT. JMS I TYP E
02~1 24!~3 . ~40 1 ~22 ~ 61 6~ ~i0 . - 03~ 7 :~3t ~
13 52:~ -~40 - JMP L,FC ~4 - LENT> JMS I TYP E

. . 7 5 4~017) JMP LEC~4 8E3F~ JMS I TYP E
~12~ 1 ^ '10 3 : l04a ~225 ~6!~6 ~5~2 41~6 ` 55 00~

J; lP I X
LFC. Ji~S I TYPE
~'1 S ~3 10757S~

Jllr> t SIMSK
CLA CLL
JilP I Tl;1E~
S SIMP1 J~IS I TYPE

1 5!~ 1 4~4 26~5 ~ 7 1 6 45'q3 ~J0~0' ISZ SC~3 .
~OP
ISZ SCR l3 J;~P .-2 NOP
~SZ SC~3 J~P .-2 ~MS I TYPE
1~131 ~
~122.

Ç3 3 1 7~2 ~724 2.2~7 4~43 ~000 NOP
ISZ SCR~3 . JMP . _ 2:>
NGP
ISZ SCR~3 J~1P .--2 Jl" S I TYP E
45 ~ S

221Ç~ 5 22 4!3 ~422 ~. 5 :' 614~

"3a~
TAD I S~ASK

. :` . -- -~O'~S7S~

D FLf'\G
S ~ C L ~
JNi' I FLt~ t Ji 117 I F I [`~ I S1 st~ si(, ~61 7 I:L~I, I;`LI
FIN 1 Sl~ F IN
SIMP"~ J'lS I TYP~I
~ 3 1 5~1 4~!a4 221 ~
261~)5 234~
~ 71 5 ')543 0~00 I:tCA SCP+3 NOP
I S Z SC1~ ~3 J~lP . -2 NOP

J?lP . -2 JMS I TYPEI
~3310 B l 2?

~70 1~1 3 -

7~2 ~ 72 4 1 6~7 62 ~.

~5~3 ~0 ' - 0000 NOP
I SZ SCR +3 J~P . -2 NOP
I SZ SCR ~3 JMP . - 2 J~lS I T`lPE1 0~.35 2~`05 ~ 417 2~3 5 22;.3 1 1"6 6 ~ J

10'~575f~ 1 ~5~3 TAD I S;1~S1 AN D FLI~ G
SN~ CL~
J~1P I FL~\2 J~1P I FlNIS~I

TYP E 1 . 0 200 DU?L~ JMS I TYPE1 l 50 1 4!304 ~605 DCA SCR+3 NOP
I S~ SCR~3 J~lP -2 2 5 Nt)P
I SZ SCR +3 J;~ o~2 JMS I TYP El 0310 .

~705 41~ 40 0~0 NOP
I SZ SCR~3 NOP
I SZ SC~+3 JOS I TYP El C~ 4~ 5 2~!~5 2k~ 5 22 ~
;5 ~ 22 1 1~6 . . .

.

. _q~ _ .:
, : . .
'' 107575~;

l 71 G
~ S ~3 ~3 TAr) I StlASi~
~ND FLAG
SNA CLA
Ji`lp I DPX
JMP I F I N I S~l DPX, FL2- 4 OFFCH)~, TA D I SMASK
AN D FLA G
SNA CLA
Jl'lP I STOP l Jl~P I STPMDl STOP I ~ O FF
STP~lDl . STPMID
*5200 TYPE7. 0200 PANIC, JMS I TYPE7 254~) 1 01) 1 ~5 26~5 ~0ll 2~10 2~30 1 . ~6ll 03~!~

2~124 . 4140 01~13 1~1 1 1 ~5 4!123 ~25 2 ~5 5 ~1 41 7 _o 2 7 1 6 56~<~
4~4 1 74~) _5 55~5 ~32 3 22c~

- . ~ .

1~'75~

220 '~

~) 3 1 7 43 ~3 00~
J~'1P I GOO Dl GOO D I, GOO DI E
I~COP. J~S I TYPE7 1 5~ 1 231~i . . 5 ~5~11 ~3~ 5 40~35 ~ 62 4 4Ç~23 03~ 7 . 20~ 1 2 44!~1 - 402~

4'~ 42 0~(;0 J,~lP I GOO Dl PON, J.-lS I TYi'E7 2C~
2(~U S
~ " ,,,,~
2~

.

107575~;
2~

1 ~S
43~J
J;IP I ENDI ~3 ENDl (), END
RFLAG. 4600 JAM, TAD I RFLAG
C MA
AND FLAl:i TAD I RFLAG`~I
DCA FLA G
JMS I TYP~:7 1 5!) 1 ~31 0 t 1 1 6 ~1 5 4~3 4~04 25~15 1.740 . 12531 ~: 1 5 41 ~ ~0 2~22 ` 30 0 523 23.4!3 o~03 1 ~1 6 - 35 2''142 4;~2 4 23~4 43!~
TAD PMOD
DCR ~lO D
TA D P ;~A DD
DCA MA D D
HI~T
TAD CCTR
CMA
DCA CCTR
T~D FLAG
. AND I AFLt'~G
` 55 SNA
JOP . +"
nUE, CMA
AND FLAG

_'~7 _ 107575~j J~lP . +3 TAD I AFL/~G
TA D FLA G
DCA F LA G
TA D FLA G
AND I AFLAG+I
St`tA CLA
JMP S~TUP
E3ACKUP. I SZ CCTR
JMP ECYK
TAD I ~FLAG+I
TAD I AFLAG~2 CllA
AND FLAG
TAD I AFLAG~2 DCA i;LAG

ECHK, KSF
JMP I MO VEFL
O . KRB
CLA CLL
TAD READ
DCA SCR

TAD SETS
SNA CLA
JMP +5 DECR. TA IJ SETS
TAD I AFLAG~3 . DCA SETS
J~`1P ~ UE - 4 DCA SETS
TAD READ
TAD I Al LAG~3 DCA READ
TAD READ
DCA SCR
TAD I SCR
SNA CLA
J;~1P . - 7 TAD READ
AND I AFLAG+4 DCA MO DE
. TAD READ
TAD I AFLAGf3 DCA O DD
TAD I SCR
AND I AFLAGfS
. 50 SNA CLA
J,'1P UN I TE
TAD I ~FLAG
Ctl~
-5 AND FLt^~G
- D(~A FLA G
J:lS I l~lOVEFL~I

107575~

~5~7 4~6 llt4 15~

4~1 ~123 2~40 . 0 622 430~
JMP DECR
U~JITE. TAD FLP.G
AN D I AFLA G
SNA CLA
TAD I AFLAG
TAD FLAG
DCA FLA G
JM S I M O VLFL ~1 0 ~i27 ~25 4~06 .
1114.
: . . 1540 ~0!~ ~.
` 30 .1 122 2 3.'"1 000~
~` JMP . DEC~ -: AFLAG~ 4611 . 46~7 ` 4635 -~ .4632 4613.

; MOVEFL~ EV3~5 02~J0 NE.YTNR~ NEXT
SA VE.~ TA n N E:~ Ti'! R
DCA S I ~t Si~
J'lP I LFC2 LFC2~ Ll;`C
S~TUPJ TAD I AFL~G+~
DCA ~AD-2 TAD I AFI..AG+7 DCA INADV

_9~_ . . . .
-: - . . . .
~ . . ,... . . ~ - - - , .
.. . .

107S'75ti, DCA I I NA DD
IS~ REI~D-2 ~)I'lP .-2 l`AD I TFLAG+I
CIIA
AND FLAG
DCA FLA G
J;1P I TFLA G
TFLAG, MIDD' E

4~1 7 4G~)C
0 2~13 COROFF> TAD I TFLAG+I
CMA
AND FLAG
DCA l; LA G
Jt~lP I ICCIIKI
ICCHKI > ICCHK
PAPER,TAD HOLD
SNA (::LA
JMP I HOL DO F
ISZ HOLD

.TAD . FLAG
TAD I TI~LAG~l . CCA Fl_A G
JMP I PO~
PON I ~PON
HOLDO F. EN D
MAY8E~TAD I TFLAG~2 AND FLAG
SZQ CLP, TAD SC~ ' 3 SNA CLA

JMP I SZSI
YOU2~ YOUI f3 SZS2. SZS~2 SZSI ~ SZS
XYZ. TAD I TFLAG+3 AN D FLA G
S ZA CLA
J;~5P I 1:)1 .
TA D I TFLA G+2 AND FLAG
SNA CLA
JMP I ODCIIKI
TA D S ETS
SNA CLA
JMP I ODCI~
JMP I D I
- ODCH:~I, OI~DCHK
- Dl . LOADER+I

. ~ . - ~ .
. ~ .

10'~575f~

EVI 6- TAD FL/~(i AND I TFL/~G~I
SZA CLA
J:`1P I E\/ENI 6 JMS 1 TFLAG+4 2fi22 4~61 06~)6 Jt1P I TRNOT
TRNO TJ EN D
EVEN1 6. EVEI 6 EVI 7~ TAD FLAG
AND I TFLAG+1 ~0 SZA C:LA

JMS I TFLAG+4 2 5 4~ 62 0~!~6 0~;513 JMP I TRt`JO T
CHGDIR- TAD FLAG
AND I FORDIR+2 SNA
JMP , ~5 CMA
AND FLAG
DCA FLA G
JMP GETON
TA D FLA G
TAD I F'ORDI R+2 JMP . - 4 FORDIR. TAD I FORDI!~+2 JMP CliGDIR~4 : 454611 GETON TA D I TFLA G +2 AN' D - FLA G
SNA CLA
J~7P I TRNO T
50 . TAD I TFL~G+3 C;~lA
AND FLAG
DCA . Fl AG
- ~;5J;-IP I TRNO T
I: ORRE V~ TA D FL~ G
AND I FORDIR~2 SZl~

'~ ' . .
, iO75'7~

J~lP REV
J : 1 S I T FLA G +
~0û6 1 t~2 271~1 -4~'~3 J;`lP I JUI`1PY
J~J;`1PYI . JU~lPy REV. Ji~S I T~LAG+4 000~
JU~lPY- TAD FLAG
~O . A~D I JFLAG
SZA CLA

TAD I JFLAGft AN D FLA G

JMP . I DNE
l`AD I JFLAGf2 C~
AND . ELAG
DCA FL~ G
JMP I DN E
UPBACK~ BACKUP
JFLA G. 4 610 ~17 ~600 DNE, END
STPMID, J~S I DDIMfl ' I Sl 1 1 6 4!~
231~

~;~ 4~
2~22 ~5~3 23'`3 4~(~3 1()'757S~

~ 7~
2~rr3 5 2~31 ~5 ~3~0 ~L 1' JMP I DDI~l DDIM. M I DDLE
02~317 l~D READ
TAn I I CON S
DCA O DD

ICONS, 4635 LOADER, I.OAD
TAD SCR"3 -SNA CLA

. JMP I O DCHK2 D2. D
ODCt~K2- ODDCHK
TAD PEAD
TAD I ICO~`~S
DCA O DD
TAD SETS -- SNA CLA
JMP I NO
JMP I YES
NO, F

*4600 ~T~E~LE OF MASKS AND CONSTANTS
~1000 200~1 0 4d0 02~0 01~0 ~)Ç) 4'3 1~ ~32~1 ~1~10 0!~;~ 4 ()a~
r~o~ l 6'3'J3 t) 30a ~s~

107S75~

~o~
~)O() 3 7~0 ~7 007~
Ba 07 7 ~

~360 O 0~74 77~

74~7 74a6 7~55 -.

25 . ` 7475 . . 0212 7~1 77?G
~S33 634~

0~20 5~00 50~1 00~6 ~5 . ~ .
22~0 : 7600 56~
3~3 7 ~73 7 ~60 10'75'75~
7 7"r) r~
4(~ G.r3 6~ 3(~
63~J
7I f~
7 ~170 . 766 6i 13 ~5000 ~INPUT TA8LE

046'3 3?24 04'd0 3 ~1 4 0 ~2 r~) 70 3 5rd21 1 3'd 2 fi767 1 4'd 3 51 ~7 07~13 22~r~ 4 21 Ol 3 ~

107575~
* 51 00 . ~ V.'\L 1 1) I 1 `~ T~ L E
'J
~f) ,f~f,~
O~O~
O'~l7 00'~ 3 '~l5 ~ -~ 3 ~ l 4 ~0~0 0'f~l7 00l?
Oal7 ~017 ~'~31 4 001?
0~l7 *0Q0i ~INTERRUPT SERVICE
J~tP I HIT
HIT~ INT
' `. *C051 . ~AUTO INDEXE$
READ~ 0C00 t~.~lTE. 0000 INADD, 0'J00 LDADD, 0000 PRADD, 'J000 ODD, 0~)00 .
~ .
.
*0 100 / SCRA TC~l PAD
SETS, 0000 - LEN~,TH, 0 ::)03 FL~ G~ 5~000 ACC. 00'~0 LCTR, 0000 PCTI~. 'J0~0 EVEI`JT~ () 00 O
~C')'~3 , ' :
' :.

10'7S'~
~GE SU
.
~~ oon~
MOD............ U 0 ~) 0 S l A l) D ~ 0 0 0 0 S l ~`lS~ 3 Ç~
0U~
t~tODE~ 00Ç)0 MADD~ ()O0Ç3 SCR~ 0000 00~0 0G~)0 ~00 PCADD~ 01300 PCMSK~ 0900 I VADD- 00Ç30 I VMS~(~ 0300 BEX I T. 0000 ' - -h'OLD) 0000 TIMER, 0000 P;~iOD. 000ç3 - PMADD, 0000 CC~R~ 0!3æ0 WOR D l ~ 0 Ç30 0 ~ORD2- 0000 ~02 6~
TEMP~ ~3000 TAD ASCII
TLS
TSF

CLA CLL
JMP I T EMP
ASCI I. 0260 - - - 1 ()7 -:

10'7~'7~

'l`he ~ollowin~ is tlle l~rintout on ~hc 'l'elety~c of a typic~l run of thc program on the PDP-~/S.
The first thincJ t}le computer does is to force a lcngth request. In this case the operator enters 17 inches. ~ext the coMputer requests t~,e nunlber of copies required in batch number 1. The operator in this instance enters 2. The computer then goes on to request the number of copies needed in batch number 2. The operator request l copy. The computer then requests the number of copies in batch number 3. At this point the operator requests a return to the length input mode which the computer does. It types out "Length" and the previously entered length of 17 inches and then waits to allow the operator to change the length if he wants to. In this example the operator changes the lenyth to 13.5 inches. The computer immediately returns to inputing the number of copies in batch number 3 where it was before the change length request came. At this point the operator requests to return to the number of copies in batch number 2 mode, so that he can change that number. The computer does this, showng that the operator had requested one copy previously. The operator changes this value to 2 and the computer again returns to the point that it was before the change request, namely inputing the number of copies in batch number 3. At this point the operator makes a run request and the computer does the necessary calculations as indicated by the flow charts and starts cycling up the machine.

- 1 0~--10'~57~

~ le C01111~U~(`l .i.'; llOW ill t:ll(` rUIl 1110~e .ll~d ~ d opera~iol-ls are t~ped out in sequencc. T}le ja~ true and falsc opcratioll involves testillg the condition of various paper detectors to determille if papcr is present or absent at the proper times. I`he "End Pitch" output separates the block of operations which go on in each pitch length of belt travel.
In the exposure sequence, the frame pairs are exposed and the film advances forward to the next pair of frames. This repeats until the micro input sees an end frame (in this simulation the end frame indication is entered from the keyboard) at which point the film advance is inhibited because these pair of frames are the last pages of this set and the first pages of the next set and must be exposed twice in succession. In our example the opera~-or arbitrarily produces an end frame via the keyboard after the second pair of frames in position. Thus our set in batch number one has 4 pages in it, and it will be noted that after the second pair of exposures the film does not advance forward again. The first set in this batch has been made at this point, so that the display is changed from two to one as shown immediately following the two flashes. It should be noted that the paper path and the transfer corotrons have not been turned on until this point. This is because the paper path is turned on as late as possible to minimize waste of paper.

-1 n~-10'~5'7~

~IC fil-St 5et 0~ this l~atch is now complctely e:po-cd and the second alld last set is startcd. ~o morc pairs of images are exposed to com~lete the batch, and the film is slewed forward to the next batch.
~len the ne~:t set is in position on the micro input, it's eY~posure be~ins. Again the operator of the simulation has arbitrarily made this set contain four pases. It is eY~posed like the first batch, and the machine starts to process out the copies.
In the middle of this processing, the operator has simulated a jam condition via the keyboard which shuts dotm the machine immediately. The operator then restarts the machine and the controller repositions the filn, to recover those images which were lost in the jam. The controller restarts the machine, reprocesses the lost images, and cycles out normally.

-ilO-107575~

LENGTH= 17~
BATCH NR 1 COPIES= 2 BATCH NR 2 COPIES=
BATCH NR 3 COPIES=
LENGTH= 17~0/135~
BATCH NR 3 COPIES= C2 BATCH NR 2 COPIES= 0~1/2 BATCH NR 3 COPIES=
MAIN DRIVES ON
CHARGE COROTRONS ON
DEVELOPER DRIVES ON
ABORT ON

SPLICE DETECT

PAPER CUT

EN~ PITCH
ABORT ON

SPLICE DETECT

FILM ADVANCE FORWARD

PAPER CUT

END PITCH
PAPER PATH ON
ABORT ON

SPLI OE DETECT

00~1/TRFR 2 ON

PAPER CUT

END PITCH

ABORT ON 1~7575~

SPLICB DETECT

FILM ADVANCE REVERSE

PAPER CUT

END PITCH
ABORT ON

SPLICE DETECT

/SLEW FILM
TRFR 2 ON ~-PAPER CUT

END PITCH
ABORT ON

SPLICE DETECT

PAPER CUT

END PITCH
ABORT ON

SPLICE DETECT

PAPER CUT

END PITCH
ABORT ON

SPLICE DETECT

PAPER CUT

END PITCH

iO757S~
ABORT ON

SPLICE DETECT

PAPER CUT

END PITCH
ABORT OFF

SPLICE DETECT

FILM ADVANCE FORWARD

PAPER CUT

END PITCH
ABORT OFF

SPLI OE DETECT

~l/TRFR 2 ON

PAPER CUT

END PITCH
ABORT OFF

SPLICE DETECT

FILM ADVANCE REVERSE

PAPER CUT
INVERT

END PITCH
ABORT OFF

SPLICE DETECT

/SLEW FILM

1075'75~
ABORT ON

SPLICE DETECT

PAPER CUT
INVERT

END PITCH
ABORT ON

SPLICE DETECT

PAPER CUT

END PITCH
ABORT ON

SPLICE DETECT

PAPER CUT

MACHINE STOP DUE TO JAM! PRESS "CONT" TO RESTART.
SLEW FILM TO FIRST FRAME
FILM ADVANCE FORWARD
FILM ADVANCE REVERSE
MAIN DRIVES ON
CHARGE COROTRONS ON
DEVELOPER DRIVES ON
ABORT ON
JAM 2 FALSE `-SPLICE DETECT
JAM 2 TRUE ..

PAPER CUT

END PITCH
!

¦ ABORT ON

! SPLICE DETECT
:i JAM 2 TRUE

¦ FILM ADVANCE FORWARD

10757S~
ABORT ON

SPLICE DETECT

00~1/TRFR 2 OFF

PAPER CUT

END PITCH
PAPER PATH ON
ABORT ON

SPLICE DETECT

FILM ADVANCE REVERSE

PAPER CUT

END PITCH
ABORT ON

SPLI OE DETECT

/SLEW FILM

PAPER CUT

END PITCH
ABORT ON

SPLICE DETECT

PAPER CUT

END PITCH
ABORT ON

SPLICE DETECT -:.

PAPER CUT

107575~;
ABORT ON

SPLICE DETECT

PAPER CUT

END PITCH
ABORT ON

SPLICE DETECT

PAPER CUT

END PITCH
ABORT.OFF

SPLICE DETECT

PAPER CUT

JAM 1 TR~JE
END PITCH
ABORT OFF

SPLICE DETECT

PAPER CUT

END PITCH
ABORT OFF

SPLI OE DETECT

PAPER RELEASE - -INVERT

END PITCH -1075'75~

ABORT OFF

SPLICE DETECT

PAPER RELEASE

END PITCH
ABORT ON

SPLI OE DETECT

PAPER RELEASE
INVERT

END PITCH
ABORT ON

SPLICE DETECT

TRFR l OFF
PAPER RELEASE
MACHINE SHUT-OFF. TO RESTART, PRESS "CONT"

- - . .
- . . ~ ` :
- -:

10'7575~i Systems Operations The sequence of systems operations will now be described with reference to the accompanying flow charts shown in Figure 16-24. The sequence assumes a roll fusing approach, but other suitable fusing means and operations can be used. If flash fusing is used all steps involving fuser warm up and fuser roll engagement disengagement operation would be eliminated as indicated.
In operating the system, the first aforementioned software program including various features are stored into - the computer in a conventional manner. To make individual copy runs, a particular film cassette having desired docu-ment originals are loaded in place. These being done then-the following sequence of operations follow in making the copy run.
General Sequence (Figure 16) The flow chart shows the general overall sequen-cing of the machine. The charts following this one, break down the individual boxes in this chart into more detailed descriptions of the specific sequences. The general sequencing of the machine is always entered through the "Power On" which is initiated by pressing the ON button 520. From there the t'Initialization and Warmup" sequence follows. After the machine is properly warmed up and it has been determined that the machine is ready for operation, the "Data Acquisition" mode is entered. In this mode the operator enters through the control console 500 all the information needed for a copy run, namely, the pitch length, mode indication (simplex or duplex), document 3~ numbers and number of copies for each of the documents called for copies. After the ~ntry of the required 10';'5';~5~

information about the run and loading of the film cassette, the operator pushes the print button and the machine enters the "Checkout/Start" mode using the aforedescribed SWITCH
SCAN routine to check if the copy run information entry is complete and correct. From there the "Calculation" mode is entered to calculate the timing list of the machine process events. After this sequence is finished the "Start Up Sequence" is entered. Previous to this point the machine had been in the STANDBY routine but at this point the machine begins to cycle up. After the "Checkout/Start" sequence has been completed, the SYSTEM enters EXECUTIVE routine and performs a "Run Mode". At this point the machine processes copies.
During the "Run Mode" if an emergency or malfunc-tion situation is detected in the machine, an exit to the "Emergency Condition" is made and appropriate action is taken.
Afterwards depending upon the required action, the "Emergency Condition" exits to a "Run Mode", "Cycle Out" mode or to "Hold" mode. During the "Run Mode" if no emergency situation is detected, the machine processes out the required number of copies and the "Run Mode" exits to the "Cycle Out" mode.
The ~Cycle Out" mode starts the shut down routine of the machine, but since some copies are still in process in the machine, the "Cycle Out" mode returns to the "Run Mode" which in turn returns to the "Cycle Out" mode. When all the- required copies are processed, the "Cycle Out"
mode shuts the machine down and exits to the "Hold"
condition. If the run was normal with no emergencies, the "Hold" condition exits to "Data Acquisition" to receive information for the next run. If the run had not been --llg--10757~

rly tl~ o~ tio~ out tll~ u is l~(~kl l)y lll~ c~ol)trollcr wllile it is in "llold" ar)d ~]~cn prol~lem is ~le~ ed ul~, tllc machine exits to the "Start U-Sequc?llce" t~ complete ~he run.
This is the general sequence for the machine. Now the flow charts showing the in depth d~tails of each mode follow.
Power On (Figure 15) This is the entry point for the whole system.
It is entered by pushing the ON button 520 and the only decision point is a check to make sure the OEF button 540 is not pushed. OFF always overrides ON. We now exit to "Initializatlon and Warmup".
Initialization and Warmup (Figure 18) The first thing done upon entering this mode is to turn on the computer logic power supply. The controller goes into a routine which clears its registers and clears the output structure as described before. The ON button is checked by the controller and the interlocks are checked. If all conditions are satisfied, the main power is latched on by the controller.
At this point, all the standby devices such as fuser 33, developer 62, charger 22, etc. are turned on. R~SET and POWER ON
software routine described above are used to implement these steps.

10757S~i If the machine had a roll fuser it would have been warmed up at this point. Since the flash fuser needs no warm up this step would be eliminated with flash fusing.
A logic check is performed next and if this is successful and if there is no fuser warmup, the program exits to "Data Acquisition" shown in Figure 19.
Data Acquisition (Figure 19) Upon entering this mode the first thing the controller requests is the input of a pitch length. This may be entered in digits via the digit keys 501. The program then converts the digits to a binary form using the proper scale factors and check to make sure that this figure falls within the machine allowable length of say between 4 and 30 inches. After the length data is satisfactorily entered, the other information on the copy run, i. e. document numbers and copy numbers and mode (i.e., simplex or duplex) are entered. Since a billing system has not been specified, billing information is not included in this discussion, but it can be easily incorporated in the program once the bill-ing format is decided upon. The program is so written thatit is possible to change the document number and page numbers or the length data at any time before the systems enters into the "run mode" and start processing the copies. The program is written so that the document numbers and corresponding copy numbers can be entered in at random to the document buffer register 210. But the computer reads them into the computer memory in the order of sequence in which the numbers appear on film 12. If a request to change previously entered document or length data is made, the program will return to the requested location to make the change and then return back to the original location when the request for the change io~7s~7'j~

cn~re~(l bcfore~ thc l~rogralTl Call leave tllis mode~ and info~rn;l-tiOII ~or up to 10 documellts Call bc entered before thc documcnt buffcr re(3ister is consi(lered to be full. TJle exit from this mode is provided by a run request or when the document table 205 is full. The capacity of document table 205 depends on the memory capacity and the configuration of the reproduction memory system. They can be readily increased by appropriate changes in the memory capacity and the software.
T}~e "Data Acquisition" moae is implemented by the Sh7ITCH SCAN software routine described before.
Check/Out/Start (Figure 20) A check out routine may be used to check out the machine 5 to make sure it is ready to run and the film 12 is loaded (Figure 20) into the film input head (Fig. 3, 11).
Successful completion of these operations allows the program to exit from this mode. Malfunction conditions of various relevant elements are checked out and if a malfunction is detected, appropriate steps are taken. SWITCH SCAN software routine described above are written to include necessary instructional routine to implement this step.
Calculation (Figure 21) In this mode a list of the machine timing of process events is calculated based on the pitch length information and the mode of operation ( i. e. simplex or duplex) in the manner described above in terms of the clock pulse count numbers between the successive machine process events in the pitch zones of the process paths as describe~l 10'75'7~

above. Film advance and positioning is figured in so that film movement occurs between the successive machine exposure steps. As an added feature of the control, selected ones of the exposure and other steps can be skipped to avoid defec-tive portions. For example, the pitch location immediately preceding the earliest flash is calculated so that splices in the paper web 28 can be avoided properly.
Since the controller is limited as to the number of simultaneous events which it can handle and since only a few events have very critical time relationshiFs, the non-critical events are adjusted i. e., time shifted, so as to eliminate simultaneous events. The calculated timing lists is then stored in the memory 206 for use. The program exits from this mode and enters into the Executive mode.
Start-Up Sequence (Fi~ure 22) The Start-up sequence shows a general sequence for thé machine cycle up. The delays can be adjusted by the program to almost any value, although it would be easiest if they were all the same length. This sequence is implemented by the real time process event Tl, T2, T3. . . Tn software routine during the EXECUTIVE mode as described above.
- Run Mode Part 1 (Figure 23) This shows the list development program that the controller 200 implements as the controller determines what events should occur in any pitch pulse time interval accord-ing to the progress of machine operation. During this opera-tion, conventional interrupt routine is utilized to load the counter 209 with a time interval indicating the time differ-ence between succeeding events in the form of clock pulse counts for the intended machine process.

10'~

t ~ i ("~ "
Tl1 i S Cll~lrt. ';IIO\J'; t]l(` ~lo~ of actiol-~ wllcn t~l( controllcr has ~k~el^Jl~ined th~ the lleXt everlt in the li;t develol)ecl in the Run Mode Part I (Figure 23) should occur.
In most cas~s this involves straightforward execution of -the event. In the case of certain real time events, T, such as End of Pitch, l~eb Cutting Signal, Flash, etc. the operations must be done in real time to determine whether the event should be executed or not. For instance, before the advance film signal can be sent out, it must be determined if an end frame is present and if one is, whether the film sl-ould be advanced to the next document or more copies should be provessed of the same document by reversing the direction of advancement of the film 12. The End of Pitch event does not cause the end of outputs by itself. Certain internal "housekeeping" chores are performed by the controller before this takes place. ~he flash signal has to check an internal flag before it is allowed to occur. The cut signal event is used to check to see if all copies have been processed out up to the cut area. If the machine is clear up to this point, the program exits to "Cycle Out", Chart 28.
~mergency Conditions (Figures 25_and 26) This mode is entered whenever an emergency condition is discovered. Basically there are three types of emergen-ciec as defined by the actions taken when an undesired ~ '7~ ~

condition is detected. The first type is a cycle out type of emergency where the program acts as if the stop copy button 540 had been pushed and cycles out the machine, processing out the copies already exposed in the machine. A more severe type of emergency is the "Quick Stop" type in which the machine is shut down to standby immediately and all data is held for start-up. The most extr~me type of emergency is the emer-gency OFF condition in which all power to the machine is shut off immediately.
Cycle Out (Figure 27) This is the mode that the Run Mode Part II
(Figure 24) exits to when the machine copy sheet papPr path is clear of copies up to cutting station 34. The paper path is shut down to save paper and then the rest of the process is cycled out. When the machine is completely empty of copies, the program exits to n Hold n, Hold (Figur~, 28) This is the mode entered from both the cycle out tFigure 27) and emergency modes (Figures 25 and 26). If this i8 a normal end of run entrance, the old data is cleared sut of the co~troller, a check is performed upon the logic, and the program exits to receive new data for the next run.
If the termination of run was not normal, then all information is held until the problem is corrected at which point the machine can be resta~ted so as to ccmplete the run. A
feature of the proqram is that in the case of a quick stop type of emergency in which some copies are lost in process in the machine, the film 12 is automaticælly repositioned by the program upon restarting so that the lost copies may be reprocessed out.

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10~7575~

In the forcgoing, an electrostatographic reproducing machine with a programmable controller embodying various aspects of the present invention has been described above.
Utilization of a programmable controller renders the machine highly flexible and versatile. In particular, it renders the machine to be capable of functioning as a variable pitch machine whereby the spaces or distances allotted for successive images formed and developed can be changed from reproduction run to reproduction run using stored programs and without changing any intervals circuitry.
While the principles of the present invention have been described in terms of web fed, single pass simplex duplex copier/duplicator machine, clearly the application thereof is not so limited. ~ person of skill in the art may modify or change the application from the teachings of the principles of the present invention without departing from the spirit and scope thereof.

Claims (11)

WHAT IS CLAIMED IS:

1. A reproduction system for producing copies of an original, comprising:
a reproduction machine including a plurality of control devices for implementing the copying process events, means for inputting a reproduction run instruction of predetermined characteristics for the reproduction run, a programmable controller having means responsive to the run instruction and means for storing an operating control program for operating the machine, said controller being operable by said operating program to derive timed control signals related to the reproduction run of said predetermined characteristics and applying said control signals to said plurality of control devices for implement-ing the copying process steps whereby the machine is enabled to make copies according to the reproduction instruction.

2. A reproduction system for producing copies of an original, comprising:
a reproduction machine including a plurality of control devices for implementing the copying process events, means for inputting a reproduction run instruction for the reproduction run including a copy size, a programmable controller having means respon-sive to the run instruction and selected copy size and means for storing an operating control program for operating the machine, said controller being operable by said operating program to derive timed control signals related to the selected copy size and applying said control signals to said plurality of control devices for implementing the copying process steps whereby the machine is enabled to make copies according to the reproduction instruction.

3. The system according to Claim 1, including an instruction routine in the stored program for enabling said system to change the copy size from a reproduction run to another.

4. The system according to Claim 1, wherein said reproduction system includes means for roll feeding web as copy material.

5. The system according to Claim 4, including an actuable cutting means, said operating control program an instruction routine for enabling said controller to generate timed control signals to actuate said cutting means to cut said web into sheets of predetermined copy length in succes-sion after the copies are made.

6. The system according to Claim 1, wherein said reproduction machine includes means for operating said machine in a simplex or duplex mode selectively, said operating control program including instructions for enabling said controller to operate said machine in simplex or duplex as selected.

- 7. The system according to Claim 1, wherein:
said program includes an instruction routine for enabling said controller to generate said control signals in successive pitches at a predetermined repetition rate, said rate being time related to the rate at which the originals are reproduced.

8. The system according to Claim 1, including means for generating a train of clock pulses related to the operational speed of the machine wherein the pitch repeti-tion rate is set at the rate of image exposure.

9. The system according to Claim 1, said con-troller including an operating control console with a plurality of input means, a computer, a plurality of latches for the control devices, and, input/output interface circuit means having a decoder for enabling said computer to address selected control devices and respond to the signals from said input means of said operating control console.

10. The system according to Claim 1, wherein said machine is adapted to implement copy making processes for a plurality of copies concurrently, said operating program stored in said controller includes instruction routines for enabling said controller to generate control signals to operate said machine in implementing the copy making processes concurrently for the plurality of copies related to a common time frame of the machine operation.

11. The system according to Claim 1, including means for advancing a continuous web of copy sheet, a web cutting means therefore, said operating program including instruction routines for enabling said controller to produce timed control signals in sequence in successive cycles for activating said web advancing means, said machine and said cutting means for making copies in succession and cutting said continuous web into sheets in succession after images are formed.