JPS5644919A - Control board - Google Patents
Control boardInfo
- Publication number
- JPS5644919A JPS5644919A JP12069479A JP12069479A JPS5644919A JP S5644919 A JPS5644919 A JP S5644919A JP 12069479 A JP12069479 A JP 12069479A JP 12069479 A JP12069479 A JP 12069479A JP S5644919 A JPS5644919 A JP S5644919A
- Authority
- JP
- Japan
- Prior art keywords
- cpu
- controlled
- control board
- dct
- board
- 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 make it unnecessary to provide a timer for each controlled memory board, by storing individual access times of controlled memory boards in the ROM of the control board and by generating WAIT signals for them by the control board, in the small-scale computer equipped with a CPU.
CONSTITUTION: The CPU transmits the address signal indicating memory board HCB-n to the system bus. The ROM in control board CB transmits storage data, which corresponds to the data read time in the designated memory board to be controlled, to down counter DCT. DCT not only sets access time information but also transmits the WAIT signal to the CPU. When the count value of DCT becomes 0 by clocks of clock generator CG and the WAIT signal terminals, the CPU starts data read from memory board to be controlled HCB-n.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12069479A JPS5644919A (en) | 1979-09-21 | 1979-09-21 | Control board |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12069479A JPS5644919A (en) | 1979-09-21 | 1979-09-21 | Control board |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5644919A true JPS5644919A (en) | 1981-04-24 |
Family
ID=14792649
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12069479A Pending JPS5644919A (en) | 1979-09-21 | 1979-09-21 | Control board |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5644919A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58125135A (en) * | 1982-01-19 | 1983-07-26 | Mitsubishi Electric Corp | Process data input and output device |
JPS6182258A (en) * | 1984-09-29 | 1986-04-25 | Ricoh Elemex Corp | Input/output device |
EP0511408A1 (en) * | 1990-11-20 | 1992-11-04 | Oki Electric Industry Company, Limited | Synchronous semiconductor memory |
US5287327A (en) * | 1990-11-20 | 1994-02-15 | Oki Electric Industry Co., Ltd. | Synchronous dynamic random access memory |
JPH07160629A (en) * | 1993-12-10 | 1995-06-23 | Nec Corp | Microprocessor |
US5572706A (en) * | 1984-01-20 | 1996-11-05 | Canon Kabushiki Kaisha | Electronic equipment having controllable access times for detachable cartridges |
-
1979
- 1979-09-21 JP JP12069479A patent/JPS5644919A/en active Pending
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58125135A (en) * | 1982-01-19 | 1983-07-26 | Mitsubishi Electric Corp | Process data input and output device |
US5572706A (en) * | 1984-01-20 | 1996-11-05 | Canon Kabushiki Kaisha | Electronic equipment having controllable access times for detachable cartridges |
JPS6182258A (en) * | 1984-09-29 | 1986-04-25 | Ricoh Elemex Corp | Input/output device |
EP0511408A1 (en) * | 1990-11-20 | 1992-11-04 | Oki Electric Industry Company, Limited | Synchronous semiconductor memory |
US5287327A (en) * | 1990-11-20 | 1994-02-15 | Oki Electric Industry Co., Ltd. | Synchronous dynamic random access memory |
US5311483A (en) * | 1990-11-20 | 1994-05-10 | Oki Electric Industry Co., Ltd. | Synchronous type semiconductor memory |
US5339276A (en) * | 1990-11-20 | 1994-08-16 | Oki Electric Industry Co., Ltd. | Synchronous dynamic random access memory |
US5430688A (en) * | 1990-11-20 | 1995-07-04 | Oki Electric Industry Co., Ltd. | Synchronous dynamic random access memory |
US5521879A (en) * | 1990-11-20 | 1996-05-28 | Oki Electric Industry Co., Ltd. | Synchronous dynamic random acess memory |
JPH07160629A (en) * | 1993-12-10 | 1995-06-23 | Nec Corp | Microprocessor |
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