JPS57103197A - Memory package checking method - Google Patents
Memory package checking methodInfo
- Publication number
- JPS57103197A JPS57103197A JP55178360A JP17836080A JPS57103197A JP S57103197 A JPS57103197 A JP S57103197A JP 55178360 A JP55178360 A JP 55178360A JP 17836080 A JP17836080 A JP 17836080A JP S57103197 A JPS57103197 A JP S57103197A
- Authority
- JP
- Japan
- Prior art keywords
- memory
- data
- work
- result
- check
- 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
Links
Abstract
PURPOSE: To facilitate a check on the package of a memory stored with an additional program by discriminating data, read out of a fixed memory by specifying a specific address, while disregarding the result of a parity check, and by storing the discrimination result in a work memory.
CONSTITUTION: To check whether a fixed memory ME2 provided separately from a fixed memory ME1 containing a basic program and stored with an additional program is packaged or not, a CPU specifies the specific address of the ME2 after a power source is put to work, and data which corresponds to the address is read out. Then, the result of its parity check PC is disregarded by data set to an interruption mask port RMP and shoring that interruption is disregarded, and said readout data is discriminated by the CPU to store a work memory 4 with information on whether the memory ME2 is packaged or not. Thus, the package of the memory is checked easily without any need to modify the basic program and to change set pins.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55178360A JPS57103197A (en) | 1980-12-17 | 1980-12-17 | Memory package checking method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55178360A JPS57103197A (en) | 1980-12-17 | 1980-12-17 | Memory package checking method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57103197A true JPS57103197A (en) | 1982-06-26 |
Family
ID=16047120
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55178360A Pending JPS57103197A (en) | 1980-12-17 | 1980-12-17 | Memory package checking method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57103197A (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52149036A (en) * | 1976-06-04 | 1977-12-10 | Hitachi Ltd | Detection method for memory capacity |
JPS5552599A (en) * | 1978-10-11 | 1980-04-17 | Ricoh Co Ltd | Read-only memory detection control method |
-
1980
- 1980-12-17 JP JP55178360A patent/JPS57103197A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52149036A (en) * | 1976-06-04 | 1977-12-10 | Hitachi Ltd | Detection method for memory capacity |
JPS5552599A (en) * | 1978-10-11 | 1980-04-17 | Ricoh Co Ltd | Read-only memory detection control method |
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