CS/A65 keyboard emulator
This board allows to emulate a real matrix keyboard for another computer. A matrix keyboard uses a set of input lines and each keypress connects an input line with a specific output line, which is detected by the host cpu. This is emulated by the board using a shared memory. Access to the shared memory is time-shared.
Table of content
Board revisions
Version: 1.0C
Status: ok
Notes
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The board implements two keyboard ports with a 8x8 matrix each, using 512 byte of I/O memory. |
Files
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csakeyemudesc.txt |
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csakeyemu.fig |
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csakeyemu.png |
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csakeyemu.ps.gz |
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csakeyemu.jpg |
Block diagram
The block diagram shows the dual access to the shared memory.