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Made it obvious how to connect it simultaneously.
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patrikaxelsson authored Sep 28, 2017
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An adapter for connecting Amiga keyboards to the C64.

Some features worth mentioning:
- Can be used simultaneously with the regular C64 keyboard.
- Can be used simultaneously with the regular C64 keyboard - just connect it in parallel.
- If connected to /RESET of the C64 user port, it will reset the C64 when pressing Ctrl-Amiga-Amiga.

It works by simulating the keyboard matrix which the C64 reads directly using two of the 8-bit CIA ports. It is assumed that the C64 always uses the 8 COL pins as outputs and the 8 ROW pins as inputs when reading the matrix.
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