JPS56135242A - Program correcting circuit - Google Patents

Program correcting circuit

Info

Publication number
JPS56135242A
JPS56135242A JP3697780A JP3697780A JPS56135242A JP S56135242 A JPS56135242 A JP S56135242A JP 3697780 A JP3697780 A JP 3697780A JP 3697780 A JP3697780 A JP 3697780A JP S56135242 A JPS56135242 A JP S56135242A
Authority
JP
Japan
Prior art keywords
program
signal
circuit
rom
switch
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
JP3697780A
Other languages
Japanese (ja)
Inventor
Tadashi Nishijima
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 JP3697780A priority Critical patent/JPS56135242A/en
Publication of JPS56135242A publication Critical patent/JPS56135242A/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
    • G06F9/30—Arrangements for executing machine instructions, e.g. instruction decode
    • G06F9/32—Address formation of the next instruction, e.g. by incrementing the instruction counter
    • G06F9/322—Address formation of the next instruction, e.g. by incrementing the instruction counter for non-sequential address
    • G06F9/328—Address formation of the next instruction, e.g. by incrementing the instruction counter for non-sequential address for runtime instruction patching
    • 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
    • G06F9/268—Microinstruction selection not based on processing results, e.g. interrupt, patch, first cycle store, diagnostic programs

Abstract

PURPOSE:To correct even a program composed of ROM as well by the program correcting circuit of a computer, by interrupting the computer and then by executing a program newly corrected in interruption processing. CONSTITUTION:Decoder 7 selects RAM3, ROM4 and input-output circuit 5 connected to data bus 2 of CPU1 to execute a program. The program correcting circuit, encircled with dotted line 8, consists of switch 9 for setting optionally an address where the program is corrected, and coincidence detecting circuit 12 which compares set signal 100 generated with switch 9 with signal 101 from cpul. When the coincidence between an address set with switch 9 and that of the memory is detected, circuit 8 outputs memory inhibition signal 102 to decoder 7 to inhibit a read of ROM and generate interruption signal 103 to CPU1 simultaneously. Thus, even a program composed of ROM is corrected.
JP3697780A 1980-03-25 1980-03-25 Program correcting circuit Pending JPS56135242A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3697780A JPS56135242A (en) 1980-03-25 1980-03-25 Program correcting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3697780A JPS56135242A (en) 1980-03-25 1980-03-25 Program correcting circuit

Publications (1)

Publication Number Publication Date
JPS56135242A true JPS56135242A (en) 1981-10-22

Family

ID=12484808

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3697780A Pending JPS56135242A (en) 1980-03-25 1980-03-25 Program correcting circuit

Country Status (1)

Country Link
JP (1) JPS56135242A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58109946A (en) * 1981-12-23 1983-06-30 Yamatake Honeywell Co Ltd Debugging method for program
JPS60209805A (en) * 1984-04-03 1985-10-22 Fuji Xerox Co Ltd Maintenance control system of copying machine or the like

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58109946A (en) * 1981-12-23 1983-06-30 Yamatake Honeywell Co Ltd Debugging method for program
JPS60209805A (en) * 1984-04-03 1985-10-22 Fuji Xerox Co Ltd Maintenance control system of copying machine or the like

Similar Documents

Publication Publication Date Title
JPS56135242A (en) Program correcting circuit
JPS55157022A (en) Output circuit for microcomputer
JPS553011A (en) Error processing system for sequence control unit
JPS5617450A (en) Data collection system
JPS5599656A (en) Interruption processor
JPS5559518A (en) Initial start process system for microprogram control data processor
JPS5569803A (en) Computer controller
JPS57199052A (en) Data processing device
JPS5588153A (en) Data processing system
JPS55146553A (en) Controlling circuit of program of microcomputer
JPS55140953A (en) Abnormal operation detecting system for computer system
JPS54138348A (en) Processing method for interruption
JPS5332632A (en) Memory control unit
JPS5696333A (en) Program correction system
JPS55164930A (en) Signal fetch unit
JPS5621251A (en) Retrial control system
JPS5350625A (en) Error detecting system
JPS6436352A (en) Memory error processing system
JPS5576445A (en) Pre-fetch control system
JPS5621258A (en) Failure storage system in central processing unit
JPS5552598A (en) Data processor
JPS55146548A (en) Microprogram controlling unit
JPS553083A (en) Control system for microprogram
JPS55162156A (en) Data processor
JPS5468133A (en) Address self restoration unit of computer system