JPS5563423A - Data transfer system - Google Patents

Data transfer system

Info

Publication number
JPS5563423A
JPS5563423A JP13665878A JP13665878A JPS5563423A JP S5563423 A JPS5563423 A JP S5563423A JP 13665878 A JP13665878 A JP 13665878A JP 13665878 A JP13665878 A JP 13665878A JP S5563423 A JPS5563423 A JP S5563423A
Authority
JP
Japan
Prior art keywords
data transfer
data
bus
zone designation
designation line
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP13665878A
Other languages
Japanese (ja)
Other versions
JPS6022777B2 (en
Inventor
Masaki Murayama
Manjiro Iida
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP13665878A priority Critical patent/JPS6022777B2/en
Publication of JPS5563423A publication Critical patent/JPS5563423A/en
Priority to US06/377,044 priority patent/US4514808A/en
Publication of JPS6022777B2 publication Critical patent/JPS6022777B2/en
Expired legal-status Critical Current

Links

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  • Bus Control (AREA)

Abstract

PURPOSE: To increase the system performance, by performing the data transfer in 16 and 32-bits with one data transfer bus and the control of data transfer with zone designation signal, in the data processing system.
CONSTITUTION: The said zone designation line 18 is activated with at least one direct memory access unit (DMA unit) connected to the zone designation line 18. When the DMA unit activating the said zone designation line 18 is in operation, the part between the main memory 10 and the data bus 16 is controlled so that the data transfer using all the buses having the data transfer width given to the data bus 16 can be made. When another DMA unit at least, not connected to the zone designation line 18 is in operation, the part between the main memory 10 and the data bus 16 is controlled so that the data transfer using a part of the bus of the data transfer width given to the data bus 16 can be made.
COPYRIGHT: (C)1980,JPO&Japio
JP13665878A 1978-04-28 1978-11-08 Data transfer method Expired JPS6022777B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP13665878A JPS6022777B2 (en) 1978-11-08 1978-11-08 Data transfer method
US06/377,044 US4514808A (en) 1978-04-28 1982-05-11 Data transfer system for a data processing system provided with direct memory access units

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13665878A JPS6022777B2 (en) 1978-11-08 1978-11-08 Data transfer method

Publications (2)

Publication Number Publication Date
JPS5563423A true JPS5563423A (en) 1980-05-13
JPS6022777B2 JPS6022777B2 (en) 1985-06-04

Family

ID=15180465

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13665878A Expired JPS6022777B2 (en) 1978-04-28 1978-11-08 Data transfer method

Country Status (1)

Country Link
JP (1) JPS6022777B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5729935U (en) * 1980-07-28 1982-02-17
JPS5990131A (en) * 1982-11-12 1984-05-24 Nec Corp Transfer device of direct memory access
JPH0399353A (en) * 1989-09-05 1991-04-24 Internatl Business Mach Corp <Ibm> Data buffer mechanism

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5729935U (en) * 1980-07-28 1982-02-17
JPS5990131A (en) * 1982-11-12 1984-05-24 Nec Corp Transfer device of direct memory access
JPH0399353A (en) * 1989-09-05 1991-04-24 Internatl Business Mach Corp <Ibm> Data buffer mechanism

Also Published As

Publication number Publication date
JPS6022777B2 (en) 1985-06-04

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