[54] DATA TRANSMISSION SYSTEM
[75] Inventors: Rikiya Okamoto; Hirokazu Kaneko,
both of Kawasaki, Japan
[73] Assignee: Fujitsu Limited, Kawasaki, Japan
[21] Appl. No.: 08/719,420
[22] Filed: Sep. 24, 1996
[30] Foreign Application Priority Data
Dec. 14, 1995 [JP] Japan 7-325341
[51] Int. CI.7 G06F 13/14
[52] U.S. CI 395/287; 395/307; 364/242.34
[58] Field of Search 395/306, 307,
395/287, 290; 364/240, 291.9, 292.3, 292.31,
242.34, 243.41
[56] References Cited
U.S. PATENT DOCUMENTS
5,185,694 2/1993 Edenfield et al 395/287
5,237,676 8/1993 Arimilli et al 395/290
5,274,784 12/1993 Arimilli et al 395/306
5,509,126 4/1996 Oprescu et al 395/307
Primary Examiner—Zarni Maung
Assistant Examiner—David M. Ovedovitz
Attorney, Agent, or Firm—Staas & Halsey
[57] ABSTRACT
A data transmission system in which data read out of a first memory is transmitted to a second memory, includes a data buffer for temporarily storing data to be transmitted from the second memory, an identifying module for identifying a maximum permissible transmission unit denned by a bus/ address boundary rule for addresses of the second memory, a deciding module for deciding a transmission unit of data to be transmitted to the second memory based on an amount of data which should be transmitted but has not yet been transmitted and the maximum permissible transmission unit identified by the identifying module, a storing control module for reading data for the transmission unit decided by the deciding module out of the first memory starting from data stored at an identified address of the first memory, in accordance with the bus/address boundary rule for the address of the first memory, and for storing the data in the data buffer, and a transmission control module for transmitting a batch of data stored in the data buffer to the second memory.
12 Claims, 11 Drawing Sheets
