JPS649551A - Memory controller - Google Patents

Memory controller

Info

Publication number
JPS649551A
JPS649551A JP62165871A JP16587187A JPS649551A JP S649551 A JPS649551 A JP S649551A JP 62165871 A JP62165871 A JP 62165871A JP 16587187 A JP16587187 A JP 16587187A JP S649551 A JPS649551 A JP S649551A
Authority
JP
Japan
Prior art keywords
data
signal
revision
memory area
passing
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
JP62165871A
Other languages
Japanese (ja)
Inventor
Yasushi Aoki
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 TEC Corp
Original Assignee
Tokyo 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 Tokyo Electric Co Ltd filed Critical Tokyo Electric Co Ltd
Priority to JP62165871A priority Critical patent/JPS649551A/en
Publication of JPS649551A publication Critical patent/JPS649551A/en
Pending legal-status Critical Current

Links

Landscapes

  • Storage Device Security (AREA)

Abstract

PURPOSE:To ensure the management of data giving inconvenience if it is revised simply and to attain the revision comparatively simply when no loading is required and the revision is required by inhibiting the passing of a signal at the execution of a conventional program and allowing the passing of the signal only at the execution of a special program. CONSTITUTION:In executing a conventional program, a gate of a gate circuit 11 is closed to inhibit the passing of a signal, then a memory area 5 of a RAM through selecting command by a the signal is not subject to data write by a control circuit. That is, the revision of data is inhibited. In revising the data in the memory area 5 storing a data giving inconvenience if it is revised, since a signal selecting and indicating the memory area outputted from a data write command signal output means 7 is given to a RAM via the gate circuit 11 by executing the special program, the revision of the data in the memory area is attained.
JP62165871A 1987-07-02 1987-07-02 Memory controller Pending JPS649551A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62165871A JPS649551A (en) 1987-07-02 1987-07-02 Memory controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62165871A JPS649551A (en) 1987-07-02 1987-07-02 Memory controller

Publications (1)

Publication Number Publication Date
JPS649551A true JPS649551A (en) 1989-01-12

Family

ID=15820566

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62165871A Pending JPS649551A (en) 1987-07-02 1987-07-02 Memory controller

Country Status (1)

Country Link
JP (1) JPS649551A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0335382A (en) * 1989-06-30 1991-02-15 Toshiba Corp Portable electronic device
US8647111B2 (en) 2005-05-05 2014-02-11 Edwards Limited Gas combustion apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0335382A (en) * 1989-06-30 1991-02-15 Toshiba Corp Portable electronic device
US8647111B2 (en) 2005-05-05 2014-02-11 Edwards Limited Gas combustion apparatus

Similar Documents

Publication Publication Date Title
JPS57161865A (en) Electronic copying machine
JPS56135204A (en) Programmable controller
ES481636A1 (en) Programmable control latch mechanism for a data processing system.
JPS57187751A (en) Vehicle engine controller
JPS57189206A (en) Numerical control system
JPS649551A (en) Memory controller
JPS5436138A (en) Direct memory access system
EP0048816A3 (en) Virtual memory microcomputer architecture
JPS6459485A (en) Ic card
JPS6462704A (en) High speed working system
JPS55157022A (en) Output circuit for microcomputer
JPS5699550A (en) Information processing unit
JPS6418817A (en) Display/selection device for hierarchy menu
JPS6432338A (en) System for loading firmware
JPS56152063A (en) Common storage control system
JPS5464277A (en) Sequence controller
JPS57143605A (en) Sequence controller
JPS5569807A (en) Numerical controller
JPS56164424A (en) Computer system
JPS57155604A (en) Controller
JPS5680734A (en) Memory system for control program of terminal device
JPS55131806A (en) Process advancing type sequential controller
JPS54109340A (en) Remote loading controller
JPS5752974A (en) Storage device
JPS5651086A (en) Instruction processor