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JPS55105751A - Microprogram control unit - Google Patents

Microprogram control unit

Info

Publication number
JPS55105751A
JPS55105751A JP1355779A JP1355779A JPS55105751A JP S55105751 A JPS55105751 A JP S55105751A JP 1355779 A JP1355779 A JP 1355779A JP 1355779 A JP1355779 A JP 1355779A JP S55105751 A JPS55105751 A JP S55105751A
Authority
JP
Japan
Prior art keywords
address
stored
return
register
address register
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
JP1355779A
Other languages
Japanese (ja)
Inventor
Hideki Nishimura
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 JP1355779A priority Critical patent/JPS55105751A/en
Publication of JPS55105751A publication Critical patent/JPS55105751A/en
Pending legal-status Critical Current

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Abstract

PURPOSE: To produce the return address, by storing the external signal selected with the return microinstruction to the lower rank bit location of the address storage means.
CONSTITUTION: The address (L+0) of the branch instruction stored in the address register 1 is stored in the return address register 2, the state of the result of execution of sub-routine is stored in the conventional register 8, and it is stored at the lower rank 2nd bit of the address register 1 via the decode section 5. The address signal except the lower rank 2 bits stored in the return address register 2 with the execution of the return microinstruction is stored in the address register 1 and the return address is produced.
COPYRIGHT: (C)1980,JPO&Japio
JP1355779A 1979-02-08 1979-02-08 Microprogram control unit Pending JPS55105751A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1355779A JPS55105751A (en) 1979-02-08 1979-02-08 Microprogram control unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1355779A JPS55105751A (en) 1979-02-08 1979-02-08 Microprogram control unit

Publications (1)

Publication Number Publication Date
JPS55105751A true JPS55105751A (en) 1980-08-13

Family

ID=11836471

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1355779A Pending JPS55105751A (en) 1979-02-08 1979-02-08 Microprogram control unit

Country Status (1)

Country Link
JP (1) JPS55105751A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5958549A (en) * 1982-09-29 1984-04-04 Hitachi Ltd Microprogram control system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5958549A (en) * 1982-09-29 1984-04-04 Hitachi Ltd Microprogram control system
JPH0561660B2 (en) * 1982-09-29 1993-09-06 Hitachi Ltd

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