JPS5552599A - Read-only memory detection control method - Google Patents
Read-only memory detection control methodInfo
- 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
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.
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)
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)
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 |
-
1978
- 1978-10-11 JP JP12476978A patent/JPS5552599A/en active Granted
Cited By (18)
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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