JPS5696350A - Memory extension system - Google Patents
Memory extension systemInfo
- Publication number
- JPS5696350A JPS5696350A JP17342179A JP17342179A JPS5696350A JP S5696350 A JPS5696350 A JP S5696350A JP 17342179 A JP17342179 A JP 17342179A JP 17342179 A JP17342179 A JP 17342179A JP S5696350 A JPS5696350 A JP S5696350A
- Authority
- JP
- Japan
- Prior art keywords
- address
- stages
- signal
- cpu11
- address signal
- 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 extend the memory without setting the address line, by using a part of the address signal to switch stages, in the system which switches stages selectively and accesses them.
CONSTITUTION: The address signal and the data signal from CPU11 are given to stages through the data bus and the address bus. The address signal is branched from the address bus and is input to stage select signal generating circuit 20. Since the stage select part is given to a part of the address signal from CPU11, this specific address signal is output by stage select signal generating circuit 20. By this signal, stages are switched, and prescribed or arbitrary address data is fetched into CPU11. Consequently, the number of stages is increased, and the memory is extended to any degree if stages are switched successively according to program contents.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17342179A JPH0246970B2 (en) | 1979-12-28 | 1979-12-28 | MEMORIKA KUCHOHOSHIKI |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17342179A JPH0246970B2 (en) | 1979-12-28 | 1979-12-28 | MEMORIKA KUCHOHOSHIKI |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5696350A true JPS5696350A (en) | 1981-08-04 |
JPH0246970B2 JPH0246970B2 (en) | 1990-10-18 |
Family
ID=15960129
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17342179A Expired - Lifetime JPH0246970B2 (en) | 1979-12-28 | 1979-12-28 | MEMORIKA KUCHOHOSHIKI |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0246970B2 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59112352A (en) * | 1981-05-07 | 1984-06-28 | アタリ・インコ−ポレ−テツド | Cartridge |
JPS59208663A (en) * | 1983-05-12 | 1984-11-27 | Konami Kogyo Kk | Method and apparatus for expanding number of addresses of read-only memory |
JPS59208662A (en) * | 1983-05-12 | 1984-11-27 | Konami Kogyo Kk | Circuit expanding number of addresses of read-only memory |
JPS6394346A (en) * | 1986-10-09 | 1988-04-25 | Nec Corp | Control system for switching bank memory |
JPH03211641A (en) * | 1990-01-17 | 1991-09-17 | Nec Corp | Address designation method for memory device |
-
1979
- 1979-12-28 JP JP17342179A patent/JPH0246970B2/en not_active Expired - Lifetime
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59112352A (en) * | 1981-05-07 | 1984-06-28 | アタリ・インコ−ポレ−テツド | Cartridge |
JPS59208663A (en) * | 1983-05-12 | 1984-11-27 | Konami Kogyo Kk | Method and apparatus for expanding number of addresses of read-only memory |
JPS59208662A (en) * | 1983-05-12 | 1984-11-27 | Konami Kogyo Kk | Circuit expanding number of addresses of read-only memory |
JPS6394346A (en) * | 1986-10-09 | 1988-04-25 | Nec Corp | Control system for switching bank memory |
JPH03211641A (en) * | 1990-01-17 | 1991-09-17 | Nec Corp | Address designation method for memory device |
Also Published As
Publication number | Publication date |
---|---|
JPH0246970B2 (en) | 1990-10-18 |
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