JPS5533268A - Dma system for electronic computer - Google Patents

Dma system for electronic computer

Info

Publication number
JPS5533268A
JPS5533268A JP10640578A JP10640578A JPS5533268A JP S5533268 A JPS5533268 A JP S5533268A JP 10640578 A JP10640578 A JP 10640578A JP 10640578 A JP10640578 A JP 10640578A JP S5533268 A JPS5533268 A JP S5533268A
Authority
JP
Japan
Prior art keywords
dma
cpu
transfer
drum
ram
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.)
Pending
Application number
JP10640578A
Other languages
Japanese (ja)
Inventor
Shigeru Ebihara
Kiyoshi Nagashima
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 JP10640578A priority Critical patent/JPS5533268A/en
Publication of JPS5533268A publication Critical patent/JPS5533268A/en
Pending legal-status Critical Current

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Abstract

PURPOSE: To increase a processing speed by disconnecting CPU from DMA operation until the DMA operation ends, by giving indication relating the DMA operation at an operation start.
CONSTITUTION: To transfer data between shared RAM 12 and drum 17, CPU 11 sends commands TRACK NO, SECTOR NO and READ/WRITE of drum 17 to the magnetic drum 17 via DCU 14. On receiving a START ADDRESS signal, etc., DMA unit 13 start DMA transfer. Once the DMA transfer is started, shared, RAM 12 and DMA unit 13 are connected together. When fixed transfer is done between shared RAM 12 and magnetic drum 17, DMA 13 connects shared RAM 12 to CPU bus 18 and sends a STATUS signal of READY back to CPU 11 via DCU 14, thereby finishing the DMA operation.
COPYRIGHT: (C)1980,JPO&Japio
JP10640578A 1978-08-31 1978-08-31 Dma system for electronic computer Pending JPS5533268A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10640578A JPS5533268A (en) 1978-08-31 1978-08-31 Dma system for electronic computer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10640578A JPS5533268A (en) 1978-08-31 1978-08-31 Dma system for electronic computer

Publications (1)

Publication Number Publication Date
JPS5533268A true JPS5533268A (en) 1980-03-08

Family

ID=14432762

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10640578A Pending JPS5533268A (en) 1978-08-31 1978-08-31 Dma system for electronic computer

Country Status (1)

Country Link
JP (1) JPS5533268A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6155763A (en) * 1984-08-27 1986-03-20 Fujitsu Ltd Channel data storing control system in control device
JPH06105447B2 (en) * 1989-08-23 1994-12-21 ディジタル イクイップメント コーポレーション Data processing system device and method for controlling the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6155763A (en) * 1984-08-27 1986-03-20 Fujitsu Ltd Channel data storing control system in control device
JPH06105447B2 (en) * 1989-08-23 1994-12-21 ディジタル イクイップメント コーポレーション Data processing system device and method for controlling the same

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