JPS5566014A - Data transfer system - Google Patents
Data transfer systemInfo
- Publication number
- JPS5566014A JPS5566014A JP13825578A JP13825578A JPS5566014A JP S5566014 A JPS5566014 A JP S5566014A JP 13825578 A JP13825578 A JP 13825578A JP 13825578 A JP13825578 A JP 13825578A JP S5566014 A JPS5566014 A JP S5566014A
- Authority
- JP
- Japan
- Prior art keywords
- data
- bff0
- main body
- computer main
- output
- 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
- Bus Control (AREA)
Abstract
PURPOSE:To make it possible to reduce the number of interface signals by providing a means which generates a transfer request signal for transfer of the last data strobe. CONSTITUTION:Data of data buffers BFF0 and BFF1 are transferred to a computer main body successively; and when data is set in BFF0 by last data strobe signal DS to complete I/O operations, an I/O device breaks busy signal BSY. At this time, the output from output end Q' of FF, FF1 is applied to the J terminal of FF, FF2 because FF, FF1 is reset, and FF2 is set, and the Q output of FF2 is applied to FF, FF3 through NOR circuit G5, and FF3 is set, thereby transferring transfer request signal REQ from output end Q of FF3 to the computer main body through driver D4. At this time, AND gate G4 is not selected because FF1 is reset, and only zone control signal ZN0 becomes ''1'', thus transferring only eight-bit data of BFF0 to the computer main body.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13825578A JPS5566014A (en) | 1978-11-09 | 1978-11-09 | Data transfer system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13825578A JPS5566014A (en) | 1978-11-09 | 1978-11-09 | Data transfer system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5566014A true JPS5566014A (en) | 1980-05-19 |
Family
ID=15217668
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13825578A Pending JPS5566014A (en) | 1978-11-09 | 1978-11-09 | Data transfer system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5566014A (en) |
-
1978
- 1978-11-09 JP JP13825578A patent/JPS5566014A/en active Pending
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