JPS57106957A - Microprogram address control system - Google Patents

Microprogram address control system

Info

Publication number
JPS57106957A
JPS57106957A JP18355580A JP18355580A JPS57106957A JP S57106957 A JPS57106957 A JP S57106957A JP 18355580 A JP18355580 A JP 18355580A JP 18355580 A JP18355580 A JP 18355580A JP S57106957 A JPS57106957 A JP S57106957A
Authority
JP
Japan
Prior art keywords
microinstruction
mbra
specified
seq
specification part
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
JP18355580A
Other languages
Japanese (ja)
Other versions
JPS6136657B2 (en
Inventor
Takashi Aoki
Hiroshi Takada
Kenji Sakai
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP18355580A priority Critical patent/JPS57106957A/en
Publication of JPS57106957A publication Critical patent/JPS57106957A/en
Publication of JPS6136657B2 publication Critical patent/JPS6136657B2/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
    • G06F9/26—Address formation of the next micro-instruction ; Microprogram storage or retrieval arrangements
    • G06F9/262—Arrangements for next microinstruction selection

Landscapes

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

Abstract

PURPOSE:To reduce the size of a microprogram controller on a next address specification system, by decreasing the number of program words, by performing arithmetic by the same instruction even when performing an operand fetch by different instructions. CONSTITUTION:A microinstruction is provided with a sequence specification part SEQ, and starting-word information and ending-word information on the 1st and 2nd kinds are specified by the specification part SEQ. When a microinstruction whose specification part SEQ indicates an ending word is stored in a microinstruction register 1, the contents of an instruction buffer 2 are specified as the next address part NA and multiway branch part MBRA of a control storage address register 4. When a microinstruction whose sequence specification part SEQ specifies the starting-word information on the 1st kind while the multiway branch specification part MBRA specified a multiway branch is stored in the microinstruction register 1, original data is rewritten in the multiway branch part MBRA of the control storage address register 4.
JP18355580A 1980-12-24 1980-12-24 Microprogram address control system Granted JPS57106957A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18355580A JPS57106957A (en) 1980-12-24 1980-12-24 Microprogram address control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18355580A JPS57106957A (en) 1980-12-24 1980-12-24 Microprogram address control system

Publications (2)

Publication Number Publication Date
JPS57106957A true JPS57106957A (en) 1982-07-03
JPS6136657B2 JPS6136657B2 (en) 1986-08-19

Family

ID=16137848

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18355580A Granted JPS57106957A (en) 1980-12-24 1980-12-24 Microprogram address control system

Country Status (1)

Country Link
JP (1) JPS57106957A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62115541A (en) * 1985-11-15 1987-05-27 Fujitsu Ltd Microinstruction branch address generating system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62115541A (en) * 1985-11-15 1987-05-27 Fujitsu Ltd Microinstruction branch address generating system

Also Published As

Publication number Publication date
JPS6136657B2 (en) 1986-08-19

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