JPS5699545A - Microprogram control electronic computer - Google Patents

Microprogram control electronic computer

Info

Publication number
JPS5699545A
JPS5699545A JP14680A JP14680A JPS5699545A JP S5699545 A JPS5699545 A JP S5699545A JP 14680 A JP14680 A JP 14680A JP 14680 A JP14680 A JP 14680A JP S5699545 A JPS5699545 A JP S5699545A
Authority
JP
Japan
Prior art keywords
ram12
mupg
pdb
high speed
electronic computer
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
JP14680A
Other languages
Japanese (ja)
Inventor
Masahiko Kida
Hitotsugu Ukon
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 JP14680A priority Critical patent/JPS5699545A/en
Publication of JPS5699545A publication Critical patent/JPS5699545A/en
Pending 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

Abstract

PURPOSE:To shorten the machine cycle time by providing the high speed RAM having the capacity of 1 block portion, and the validity bit register of 1 bit corresponding to each word of the high speed RAM. CONSTITUTION:In addition to the control memory device CS2 storing the microprogram muPG, the high speed RAM12 of small capacity and the validity bit register R13 of 1 bit corresponding to each word of the RAM12 are provided. When the validity bit PDB is ''0'', the muPG which has been read out from the CS2 is written to the corresponding RAM12, and also the PDB is changed to ''1''. In case branch has occurred in 1 block which is being executed at present, if the PDB is ''1'', the machine cycle is raised by reading out the muPG from the RAM12 instead of the CS2.
JP14680A 1980-01-07 1980-01-07 Microprogram control electronic computer Pending JPS5699545A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14680A JPS5699545A (en) 1980-01-07 1980-01-07 Microprogram control electronic computer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14680A JPS5699545A (en) 1980-01-07 1980-01-07 Microprogram control electronic computer

Publications (1)

Publication Number Publication Date
JPS5699545A true JPS5699545A (en) 1981-08-10

Family

ID=11465884

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14680A Pending JPS5699545A (en) 1980-01-07 1980-01-07 Microprogram control electronic computer

Country Status (1)

Country Link
JP (1) JPS5699545A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5882342A (en) * 1981-11-11 1983-05-17 Nec Corp Microprogram controller

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5882342A (en) * 1981-11-11 1983-05-17 Nec Corp Microprogram controller

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