JPS54157450A - Microprogram-controlled data processor - Google Patents

Microprogram-controlled data processor

Info

Publication number
JPS54157450A
JPS54157450A JP6576278A JP6576278A JPS54157450A JP S54157450 A JPS54157450 A JP S54157450A JP 6576278 A JP6576278 A JP 6576278A JP 6576278 A JP6576278 A JP 6576278A JP S54157450 A JPS54157450 A JP S54157450A
Authority
JP
Japan
Prior art keywords
microprogram
main memory
address
memory
processor
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
JP6576278A
Other languages
Japanese (ja)
Other versions
JPS6136254B2 (en
Inventor
Hideo Maejima
Kunihiko Onuma
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP6576278A priority Critical patent/JPS54157450A/en
Publication of JPS54157450A publication Critical patent/JPS54157450A/en
Publication of JPS6136254B2 publication Critical patent/JPS6136254B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To reduce the increment of the degree of integration as well as to eliminate the increment of the access time to the main memory by performing extension of the address space of the main memory with addition of a few parts without giving any treatment to the microprocessor.
CONSTITUTION: The microprogram memory addresses are designated in sequence, and the microprogram order designated by the memory address is read out to perform the data process of the main memory. In such data processor, microprocessor 400 is provided to decode the address of fixed memory unit 400 which stores the microprogram along with main memory extension device 404 to memorize temporarily the information decoded by processor 400. Then the fact that the address of unit 400 has reached the prescribed level is detected by processor 400, and the result of the detection is memorized in device 404 to be used as the address space extension bit of main memory 100.
COPYRIGHT: (C)1979,JPO&Japio
JP6576278A 1978-06-02 1978-06-02 Microprogram-controlled data processor Granted JPS54157450A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6576278A JPS54157450A (en) 1978-06-02 1978-06-02 Microprogram-controlled data processor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6576278A JPS54157450A (en) 1978-06-02 1978-06-02 Microprogram-controlled data processor

Publications (2)

Publication Number Publication Date
JPS54157450A true JPS54157450A (en) 1979-12-12
JPS6136254B2 JPS6136254B2 (en) 1986-08-18

Family

ID=13296353

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6576278A Granted JPS54157450A (en) 1978-06-02 1978-06-02 Microprogram-controlled data processor

Country Status (1)

Country Link
JP (1) JPS54157450A (en)

Also Published As

Publication number Publication date
JPS6136254B2 (en) 1986-08-18

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