JPS5634199A - Memory correction system - Google Patents

Memory correction system

Info

Publication number
JPS5634199A
JPS5634199A JP10895779A JP10895779A JPS5634199A JP S5634199 A JPS5634199 A JP S5634199A JP 10895779 A JP10895779 A JP 10895779A JP 10895779 A JP10895779 A JP 10895779A JP S5634199 A JPS5634199 A JP S5634199A
Authority
JP
Japan
Prior art keywords
address
patch
unit
circuit
feeds
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
JP10895779A
Other languages
Japanese (ja)
Inventor
Susumu Inoue
Jiro Osawa
Masakado Maekawa
Isao Ikeda
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 JP10895779A priority Critical patent/JPS5634199A/en
Publication of JPS5634199A publication Critical patent/JPS5634199A/en
Pending legal-status Critical Current

Links

Landscapes

  • Read Only Memory (AREA)
  • For Increasing The Reliability Of Semiconductor Memories (AREA)
  • Techniques For Improving Reliability Of Storages (AREA)

Abstract

PURPOSE: To make easy the correction of content of ROM, by providing the patching unit.
CONSTITUTION: The address information of the main memory unit 5 is stored in the address register 1, the patch detection circuit 3 in the patching unit a receives the address information via the bus 101, and the patch information storage circuit 2 detects the presence of patch with the comparison with the patch address preset. If patch is present, the significance signal 301 is fed to the address conversion circuit 4, the circuit 4 obtains the address of PROM area of the unit 5 corresponding to the patch address and feeds it to the unit 5. Thus, the unit 5 fetches the program information corresponded from ROM or PROM and feeds it to the data register 6.
COPYRIGHT: (C)1981,JPO&Japio
JP10895779A 1979-08-27 1979-08-27 Memory correction system Pending JPS5634199A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10895779A JPS5634199A (en) 1979-08-27 1979-08-27 Memory correction system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10895779A JPS5634199A (en) 1979-08-27 1979-08-27 Memory correction system

Publications (1)

Publication Number Publication Date
JPS5634199A true JPS5634199A (en) 1981-04-06

Family

ID=14497936

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10895779A Pending JPS5634199A (en) 1979-08-27 1979-08-27 Memory correction system

Country Status (1)

Country Link
JP (1) JPS5634199A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58130496A (en) * 1982-01-28 1983-08-03 Nippon Telegr & Teleph Corp <Ntt> Solid state storage device
JPS60112358A (en) * 1983-11-22 1985-06-18 Tamura Electric Works Ltd Method for setting data of public telephone set
JPS60112359A (en) * 1983-11-22 1985-06-18 Tamura Electric Works Ltd Method for setting numerical data of public telephone set
JPS6245798U (en) * 1985-09-05 1987-03-19
JPH0323598A (en) * 1989-06-21 1991-01-31 Honda Motor Co Ltd Rom device
JPH06131171A (en) * 1990-05-24 1994-05-13 Schlumberger Ind Ltd Mask programmable microprocessor
US5357627A (en) * 1989-03-28 1994-10-18 Olympus Optical Co., Ltd. Microcomputer having a program correction function

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58130496A (en) * 1982-01-28 1983-08-03 Nippon Telegr & Teleph Corp <Ntt> Solid state storage device
JPS60112358A (en) * 1983-11-22 1985-06-18 Tamura Electric Works Ltd Method for setting data of public telephone set
JPS60112359A (en) * 1983-11-22 1985-06-18 Tamura Electric Works Ltd Method for setting numerical data of public telephone set
JPS6245798U (en) * 1985-09-05 1987-03-19
US5357627A (en) * 1989-03-28 1994-10-18 Olympus Optical Co., Ltd. Microcomputer having a program correction function
US5592613A (en) * 1989-03-28 1997-01-07 Olympus Optical Co., Ltd. Microcomputer having a program correction function
JPH0323598A (en) * 1989-06-21 1991-01-31 Honda Motor Co Ltd Rom device
JPH06131171A (en) * 1990-05-24 1994-05-13 Schlumberger Ind Ltd Mask programmable microprocessor

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