JPS5547524A - Data transmission device - Google Patents

Data transmission device

Info

Publication number
JPS5547524A
JPS5547524A JP11857178A JP11857178A JPS5547524A JP S5547524 A JPS5547524 A JP S5547524A JP 11857178 A JP11857178 A JP 11857178A JP 11857178 A JP11857178 A JP 11857178A JP S5547524 A JPS5547524 A JP S5547524A
Authority
JP
Japan
Prior art keywords
command word
circuit
accommodating position
main memory
command
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
JP11857178A
Other languages
Japanese (ja)
Inventor
Tatsuro Hashiguchi
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP11857178A priority Critical patent/JPS5547524A/en
Publication of JPS5547524A publication Critical patent/JPS5547524A/en
Pending legal-status Critical Current

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Abstract

PURPOSE: To look ahead the command word without limit for the soft by judging if there is a possibility that the command word is changed by the already read data transmission command when the command word is read from the main memory device in advance of the performance of the command.
CONSTITUTION: The look ahead command word memory circuit 14 reads the command word prefetched by the command word prefetch control circuit 13 in the command word prefetch control portion 12 from the main memory circuit 11 and accommodated. The data accommodating position memory circuit 15 memorizes the data accommodating position in the main memory device of the data transmission corresponding to the case where the read command word indicates the data accommodating position to the main memory device. The prefetch command word accommodating position in the main memory device 11 of the command word about to be prefetched in the next place is read by the prefetch command word position memory circuit 16 and the comparison circuit 17 compares the command word accommodating position memorized in the circuit 16 with the data accommodating position memorized in the circuit 15.
COPYRIGHT: (C)1980,JPO&Japio
JP11857178A 1978-09-28 1978-09-28 Data transmission device Pending JPS5547524A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11857178A JPS5547524A (en) 1978-09-28 1978-09-28 Data transmission device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11857178A JPS5547524A (en) 1978-09-28 1978-09-28 Data transmission device

Publications (1)

Publication Number Publication Date
JPS5547524A true JPS5547524A (en) 1980-04-04

Family

ID=14739886

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11857178A Pending JPS5547524A (en) 1978-09-28 1978-09-28 Data transmission device

Country Status (1)

Country Link
JP (1) JPS5547524A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57193842A (en) * 1981-05-22 1982-11-29 Hitachi Ltd Request conflict detecting system
JPS5892041A (en) * 1981-11-27 1983-06-01 Hitachi Ltd Data processor
JPS6180334A (en) * 1984-09-26 1986-04-23 Nec Corp Electronic computer

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5112225A (en) * 1974-07-12 1976-01-30 Signode Corp
JPS522139A (en) * 1975-06-24 1977-01-08 Hitachi Ltd Information processing apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5112225A (en) * 1974-07-12 1976-01-30 Signode Corp
JPS522139A (en) * 1975-06-24 1977-01-08 Hitachi Ltd Information processing apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57193842A (en) * 1981-05-22 1982-11-29 Hitachi Ltd Request conflict detecting system
JPS5892041A (en) * 1981-11-27 1983-06-01 Hitachi Ltd Data processor
JPS6132698B2 (en) * 1981-11-27 1986-07-29 Hitachi Ltd
JPS6180334A (en) * 1984-09-26 1986-04-23 Nec Corp Electronic computer

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