JPS5552599A - Read-only memory detection control method - Google Patents

Read-only memory detection control method

Info

Publication number
JPS5552599A
JPS5552599A JP12476978A JP12476978A JPS5552599A JP S5552599 A JPS5552599 A JP S5552599A JP 12476978 A JP12476978 A JP 12476978A JP 12476978 A JP12476978 A JP 12476978A JP S5552599 A JPS5552599 A JP S5552599A
Authority
JP
Japan
Prior art keywords
sockets
roms
program
rom2
rom
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.)
Granted
Application number
JP12476978A
Other languages
Japanese (ja)
Other versions
JPS6127783B2 (en
Inventor
Masayuki Hayashi
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP12476978A priority Critical patent/JPS5552599A/en
Publication of JPS5552599A publication Critical patent/JPS5552599A/en
Publication of JPS6127783B2 publication Critical patent/JPS6127783B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE:To prevent a program from being executed with ROM stored incorrectly by storing diagnostic program ROM in a fixed socket and then by automatically detecting whether this ROM is stored in the socket correctly. CONSTITUTION:To a duplicating machine equipped with computer 1, mechanical control program ROM2 is connected and sockets 3 and 4 connected to diagnostic program ROMs 5 and 6 are further connected. To data bus DB where this computer 1, ROM2 and sockets 3 and 4 are connected, pull-up resistance R is connected which generates a voltage automatically when ROMs 5 and 6 are not set to sockets 3 and 4 properly. Then, addresses set to ROM2 when ROMs 5 and 6 are not set to sockets 3 and 4 properly are changed by a voltage detected by pull-up resistance R to inhibit the tramsmission of addresses to ROMs 5 and 6, thereby preventing a program from being executed.
JP12476978A 1978-10-11 1978-10-11 Read-only memory detection control method Granted JPS5552599A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12476978A JPS5552599A (en) 1978-10-11 1978-10-11 Read-only memory detection control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12476978A JPS5552599A (en) 1978-10-11 1978-10-11 Read-only memory detection control method

Publications (2)

Publication Number Publication Date
JPS5552599A true JPS5552599A (en) 1980-04-17
JPS6127783B2 JPS6127783B2 (en) 1986-06-27

Family

ID=14893654

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12476978A Granted JPS5552599A (en) 1978-10-11 1978-10-11 Read-only memory detection control method

Country Status (1)

Country Link
JP (1) JPS5552599A (en)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57103197A (en) * 1980-12-17 1982-06-26 Fujitsu Kiden Ltd Memory package checking method
JPS57142652A (en) * 1981-02-27 1982-09-03 Konishiroku Photo Ind Co Ltd Electrostatic recording apparatus
JPS57162189A (en) * 1981-03-27 1982-10-05 Fujitsu Ltd Testing method for memory device
JPS583019A (en) * 1981-06-26 1983-01-08 エヌ・ベー・フイリップス・フルーイランペンファブリケン Digital data unit
JPS5853093A (en) * 1981-09-22 1983-03-29 Fujitsu Ltd Semicondutor device
JPS58111168A (en) * 1981-12-25 1983-07-02 Canon Inc Information transmitting device
JPS58125108A (en) * 1982-01-21 1983-07-26 Hitachi Constr Mach Co Ltd Controller with diagnostic cassette fitting connector
JPS58127211A (en) * 1982-01-23 1983-07-29 Hitachi Constr Mach Co Ltd Controller having detection function for defective cassette loading
JPS58151997U (en) * 1982-03-31 1983-10-12 松下電工株式会社 ROM connection determination device
JPS58203514A (en) * 1982-01-23 1983-11-28 Hitachi Constr Mach Co Ltd Controlling device provided with connector for fitting diagnosis cassette
JPS59104228U (en) * 1982-12-28 1984-07-13 三洋電機株式会社 Processor runaway prevention device
JPS6098447A (en) * 1983-11-04 1985-06-01 Fuji Xerox Co Ltd Non-volatile storage device for control device of copying machine
JPS60103667A (en) * 1983-11-10 1985-06-07 Fujitsu Ltd Image pickup device
JPS60168253A (en) * 1984-02-10 1985-08-31 Japan Electronic Control Syst Co Ltd Software checking device of microcomputer
JPH01136256A (en) * 1987-11-24 1989-05-29 Nec Corp Storage device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3815103A (en) * 1973-01-02 1974-06-04 Honeywell Inf Systems Memory presence checking apparatus
JPS5266340A (en) * 1975-11-29 1977-06-01 Tokyo Electric Co Ltd Judgement whether expansion memory for information processor is mounte d or not
JPS5547546A (en) * 1978-09-29 1980-04-04 Oki Electric Ind Co Ltd Microcomputer circuit

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57103197A (en) * 1980-12-17 1982-06-26 Fujitsu Kiden Ltd Memory package checking method
JPS57142652A (en) * 1981-02-27 1982-09-03 Konishiroku Photo Ind Co Ltd Electrostatic recording apparatus
JPS57162189A (en) * 1981-03-27 1982-10-05 Fujitsu Ltd Testing method for memory device
JPS583019A (en) * 1981-06-26 1983-01-08 エヌ・ベー・フイリップス・フルーイランペンファブリケン Digital data unit
JPH0219503B2 (en) * 1981-06-26 1990-05-02 Fuiritsupusu Furuuiranpenfuaburiken Nv
JPS6129080B2 (en) * 1981-09-22 1986-07-04 Fujitsu Ltd
JPS5853093A (en) * 1981-09-22 1983-03-29 Fujitsu Ltd Semicondutor device
JPS58111168A (en) * 1981-12-25 1983-07-02 Canon Inc Information transmitting device
JPH022235B2 (en) * 1981-12-25 1990-01-17 Canon Kk
JPS58125108A (en) * 1982-01-21 1983-07-26 Hitachi Constr Mach Co Ltd Controller with diagnostic cassette fitting connector
JPS58127211A (en) * 1982-01-23 1983-07-29 Hitachi Constr Mach Co Ltd Controller having detection function for defective cassette loading
JPS58203514A (en) * 1982-01-23 1983-11-28 Hitachi Constr Mach Co Ltd Controlling device provided with connector for fitting diagnosis cassette
JPS58151997U (en) * 1982-03-31 1983-10-12 松下電工株式会社 ROM connection determination device
JPS59104228U (en) * 1982-12-28 1984-07-13 三洋電機株式会社 Processor runaway prevention device
JPS6098447A (en) * 1983-11-04 1985-06-01 Fuji Xerox Co Ltd Non-volatile storage device for control device of copying machine
JPS60103667A (en) * 1983-11-10 1985-06-07 Fujitsu Ltd Image pickup device
JPS60168253A (en) * 1984-02-10 1985-08-31 Japan Electronic Control Syst Co Ltd Software checking device of microcomputer
JPH01136256A (en) * 1987-11-24 1989-05-29 Nec Corp Storage device

Also Published As

Publication number Publication date
JPS6127783B2 (en) 1986-06-27

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