JPS6465633A - Microprogram controller - Google Patents
Microprogram controllerInfo
- Publication number
- JPS6465633A JPS6465633A JP22194887A JP22194887A JPS6465633A JP S6465633 A JPS6465633 A JP S6465633A JP 22194887 A JP22194887 A JP 22194887A JP 22194887 A JP22194887 A JP 22194887A JP S6465633 A JPS6465633 A JP S6465633A
- Authority
- JP
- Japan
- Prior art keywords
- storage part
- memory
- microprogram
- time
- read out
- 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
Landscapes
- Stored Programmes (AREA)
Abstract
PURPOSE:To easily rewrite and replace the contents of a ROM IC at the time of changing a microprogram and to improve echonomical efficiency by providing the titled device with a main storage part, an auxiliary storage part, a microprogram setting means, and an auxiliary storage writing means. CONSTITUTION:When a power supply is turned on, a control memory data setting circuit 5 is driven and a microprogram is read out from a ROM IC in a main storage part 6 and set up in a control memory 2. A memory is set up in a storage part 6, and at the time of turning on the power supply, data are not read out from an auxiliary storage part 7 and operation is started similarly to the ordinary case. Then, the initial program load is executed from the storage part 6 and changing data in the storage part 7 are also set up. On the other hand, microprogram changing information is read out from the storage part 7 on the basis of a micro-initializing signal generated at the time of loading. The initial reading data indicate start, the succeeding data indicate the writing of a microinstruction 1 in an address ADR1 of the memory 2 and the writing is started. Thus, the memory 2 is corrected until the detection of an end, and at the time of detecting the end, operation using the memory 2 can be restarted.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22194887A JPS6465633A (en) | 1987-09-07 | 1987-09-07 | Microprogram controller |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22194887A JPS6465633A (en) | 1987-09-07 | 1987-09-07 | Microprogram controller |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6465633A true JPS6465633A (en) | 1989-03-10 |
Family
ID=16774664
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP22194887A Pending JPS6465633A (en) | 1987-09-07 | 1987-09-07 | Microprogram controller |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6465633A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5454100A (en) * | 1992-09-18 | 1995-09-26 | Sony Corporation | Electronic apparatus |
US5619678A (en) * | 1992-09-19 | 1997-04-08 | Sony Corporation | Electronic device for correction of ROM data with a parameter for calculation of position of correction data |
US5623665A (en) * | 1992-01-13 | 1997-04-22 | Sony Corporation | Electronic apparatus for patching a read-only memory |
US5731972A (en) * | 1992-09-19 | 1998-03-24 | Sony Corporation | Electronic apparatus which inhibits control of certain objects during initialization processing |
US6128751A (en) * | 1992-01-24 | 2000-10-03 | Sony Corporation | Electronic apparatus and method for patching a fixed information |
US6237120B1 (en) | 1991-05-23 | 2001-05-22 | Sony Corporation | Program patching of a ROM |
-
1987
- 1987-09-07 JP JP22194887A patent/JPS6465633A/en active Pending
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6237120B1 (en) | 1991-05-23 | 2001-05-22 | Sony Corporation | Program patching of a ROM |
US5623665A (en) * | 1992-01-13 | 1997-04-22 | Sony Corporation | Electronic apparatus for patching a read-only memory |
US6128751A (en) * | 1992-01-24 | 2000-10-03 | Sony Corporation | Electronic apparatus and method for patching a fixed information |
US5454100A (en) * | 1992-09-18 | 1995-09-26 | Sony Corporation | Electronic apparatus |
US5619678A (en) * | 1992-09-19 | 1997-04-08 | Sony Corporation | Electronic device for correction of ROM data with a parameter for calculation of position of correction data |
US5731972A (en) * | 1992-09-19 | 1998-03-24 | Sony Corporation | Electronic apparatus which inhibits control of certain objects during initialization processing |
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