JPS54139438A - Input terminal control unit - Google Patents
Input terminal control unitInfo
- Publication number
- JPS54139438A JPS54139438A JP4722278A JP4722278A JPS54139438A JP S54139438 A JPS54139438 A JP S54139438A JP 4722278 A JP4722278 A JP 4722278A JP 4722278 A JP4722278 A JP 4722278A JP S54139438 A JPS54139438 A JP S54139438A
- Authority
- JP
- Japan
- Prior art keywords
- control unit
- constitution
- bus
- main body
- control
- 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 simplify the circuit constitution with reduction of the burden of the computer main body as well as to ensure an easy maintenance of the control unit at an optional time by providing the microprocessor to carry out the process for the input/output data including the error process.
CONSTITUTION: the control for the data transfer is carried out by microcomputer CPU25 via the microprogram incorporated into ROM27 between manual operation input part 1 and 5 such as the keyboard, the hand scanner or the like and computer main body input part 14. In such constitution, the number of the elements packed into the control unit is reduced with simplified and minituarized structure. Furthermore, the alteration and addition of the functions are facilitated owing to the microprogram control. Also, the maintenance work becomes possible easily when necessary with installation of connector 34 which can be connected directly to address bus A-BUS, data B-BUS and the like from outside.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4722278A JPS54139438A (en) | 1978-04-21 | 1978-04-21 | Input terminal control unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4722278A JPS54139438A (en) | 1978-04-21 | 1978-04-21 | Input terminal control unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54139438A true JPS54139438A (en) | 1979-10-29 |
Family
ID=12769150
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4722278A Pending JPS54139438A (en) | 1978-04-21 | 1978-04-21 | Input terminal control unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54139438A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6045860A (en) * | 1983-08-23 | 1985-03-12 | Nippon Telegr & Teleph Corp <Ntt> | Input and output controller |
JPS6051963A (en) * | 1983-08-30 | 1985-03-23 | Nec Corp | Input/output processing device |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5161233A (en) * | 1974-11-26 | 1976-05-27 | Nippon Electric Co | Shuhensochino seigyosochi |
-
1978
- 1978-04-21 JP JP4722278A patent/JPS54139438A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5161233A (en) * | 1974-11-26 | 1976-05-27 | Nippon Electric Co | Shuhensochino seigyosochi |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6045860A (en) * | 1983-08-23 | 1985-03-12 | Nippon Telegr & Teleph Corp <Ntt> | Input and output controller |
JPS6051963A (en) * | 1983-08-30 | 1985-03-23 | Nec Corp | Input/output processing device |
JPH0219497B2 (en) * | 1983-08-30 | 1990-05-02 | Nippon Electric Co |
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