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JPS5541558A - Micro program control system - Google Patents

Micro program control system

Info

Publication number
JPS5541558A
JPS5541558A JP11491878A JP11491878A JPS5541558A JP S5541558 A JPS5541558 A JP S5541558A JP 11491878 A JP11491878 A JP 11491878A JP 11491878 A JP11491878 A JP 11491878A JP S5541558 A JPS5541558 A JP S5541558A
Authority
JP
Japan
Prior art keywords
rom
data
micro program
internal register
skip
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
JP11491878A
Other languages
Japanese (ja)
Inventor
Mitsuo Terajima
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP11491878A priority Critical patent/JPS5541558A/en
Publication of JPS5541558A publication Critical patent/JPS5541558A/en
Pending legal-status Critical Current

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Abstract

PURPOSE: To facilitate firmware control by giving a skip function to a micro program.
CONSTITUTION: At a normal branch time, immediate data as a displacement is loaded to ROM address register 2 after being stored in registers 6 and 7 from a ROM at an unconditional branch time specially, and a micro program string is branched. In case of a skip instruction, the internal register and immediate code data of the ROM are compared with each other to skip instructions on a basis of the condition. When the instruction has been just decoded, selector 9 selects data of the internal register, and data of the internal register is inputted to one side of ALU12 through selector 10. Immediate code data of the ROM is inputted to ALU 12. The result of ALU12 is set to accumulator 14.
COPYRIGHT: (C)1980,JPO&Japio
JP11491878A 1978-09-19 1978-09-19 Micro program control system Pending JPS5541558A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11491878A JPS5541558A (en) 1978-09-19 1978-09-19 Micro program control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11491878A JPS5541558A (en) 1978-09-19 1978-09-19 Micro program control system

Publications (1)

Publication Number Publication Date
JPS5541558A true JPS5541558A (en) 1980-03-24

Family

ID=14649879

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11491878A Pending JPS5541558A (en) 1978-09-19 1978-09-19 Micro program control system

Country Status (1)

Country Link
JP (1) JPS5541558A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56153447A (en) * 1980-04-30 1981-11-27 Nec Corp Microprogram control device
JPS56153448A (en) * 1980-04-30 1981-11-27 Nec Corp Microprogram control device
JPS57134757U (en) * 1981-02-10 1982-08-23
JPS57212546A (en) * 1981-06-25 1982-12-27 Hitachi Ltd Controlling system for electronic computer
EP0540155A2 (en) * 1991-10-29 1993-05-05 Advanced Micro Devices, Inc. Digital limit checking system

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56153447A (en) * 1980-04-30 1981-11-27 Nec Corp Microprogram control device
JPS56153448A (en) * 1980-04-30 1981-11-27 Nec Corp Microprogram control device
JPS6161411B2 (en) * 1980-04-30 1986-12-25 Nippon Electric Co
JPS6226486B2 (en) * 1980-04-30 1987-06-09 Nippon Electric Co
JPS57134757U (en) * 1981-02-10 1982-08-23
JPS629545Y2 (en) * 1981-02-10 1987-03-05
JPS57212546A (en) * 1981-06-25 1982-12-27 Hitachi Ltd Controlling system for electronic computer
EP0540155A2 (en) * 1991-10-29 1993-05-05 Advanced Micro Devices, Inc. Digital limit checking system

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