JPS57105036A - Register means access system - Google Patents

Register means access system

Info

Publication number
JPS57105036A
JPS57105036A JP55182283A JP18228380A JPS57105036A JP S57105036 A JPS57105036 A JP S57105036A JP 55182283 A JP55182283 A JP 55182283A JP 18228380 A JP18228380 A JP 18228380A JP S57105036 A JPS57105036 A JP S57105036A
Authority
JP
Japan
Prior art keywords
register
signal
access
write
rreq
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
JP55182283A
Other languages
Japanese (ja)
Other versions
JPS6221139B2 (en
Inventor
Toshio Goto
Yoshio Asaji
Naoki Koizumi
Hirobumi Tatsuta
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.)
Panafacom Ltd
Original Assignee
Panafacom 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 Panafacom Ltd filed Critical Panafacom Ltd
Priority to JP55182283A priority Critical patent/JPS57105036A/en
Publication of JPS57105036A publication Critical patent/JPS57105036A/en
Publication of JPS6221139B2 publication Critical patent/JPS6221139B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/22—Microcontrol or microprogram arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Software Systems (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Storage Device Security (AREA)

Abstract

PURPOSE:To make a register execute different operations, by applying an access signal to at least one register, and making it decide whether access is available or not in accordance with 2 states, in an access system of the register of a microprogram control information processing device. CONSTITUTION:When a micro-instruction is set to a micro-instruction register 107 from a microprogram memory 109, contents of a part 108 of its register are led to an access control device 110, and an access request signal MREG and RREQ are generated. In this case, an interruption factor register 202 does not permit write from software and write is not available in case when the signal NREQ is outputted, but the signal MREQ is applied to a main memory 204. Also, a register 203 permits read-out and write-in from software, therefore, both the signal MERQ and RREQ are accessed.
JP55182283A 1980-12-23 1980-12-23 Register means access system Granted JPS57105036A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55182283A JPS57105036A (en) 1980-12-23 1980-12-23 Register means access system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55182283A JPS57105036A (en) 1980-12-23 1980-12-23 Register means access system

Publications (2)

Publication Number Publication Date
JPS57105036A true JPS57105036A (en) 1982-06-30
JPS6221139B2 JPS6221139B2 (en) 1987-05-11

Family

ID=16115558

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55182283A Granted JPS57105036A (en) 1980-12-23 1980-12-23 Register means access system

Country Status (1)

Country Link
JP (1) JPS57105036A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0397414A2 (en) * 1989-05-08 1990-11-14 Matsushita Electric Industrial Co., Ltd. Control device having a function of modifying a microinstruction

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5138849A (en) * 1974-09-28 1976-03-31 Fujitsu Ltd Rejisuta adoreshinguhoshiki

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5138849A (en) * 1974-09-28 1976-03-31 Fujitsu Ltd Rejisuta adoreshinguhoshiki

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0397414A2 (en) * 1989-05-08 1990-11-14 Matsushita Electric Industrial Co., Ltd. Control device having a function of modifying a microinstruction
US5479620A (en) * 1989-05-08 1995-12-26 Matsushita Electric Industrial Co., Ltd. Control unit modifying micro instructions for one cycle execution

Also Published As

Publication number Publication date
JPS6221139B2 (en) 1987-05-11

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