On 2015-06-30 10:41, Marko MÃ¤kelÃ¤ wrote: > Hmm, this seems the opposite route: using a modern keyboard with old > hardware. I thought that Jim Brain already has something for this > application. AFAIU he is controlling a programmable switch matrix with a > microcontroller. I have (somewhere - one of those little things that I am unable to find after moving stuff around) an implementation based on an Atmel and an analogue cross point switch IC. But I am quite sure it isn't Jim's work. So there is at least one more in the wild. > If you know which way the software is reading the keyboard matrix, you > can theoretically replace it with something simpler, such as essentially > a RAM that connects address lines to columns and data lines to rows, or > vice versa. Instead of address and data lines, you might even use the > GPIO lines of a fast enough microcontroller, and maybe implement Pin > Change Interrupt on those lines. AFAIR all the earlier projects of this type kept failing one way or another. The only one that I can eventually confirm working well was the one with analogue switch IC. -- SD! Message was sent through the cbm-hackers mailing listReceived on 2015-06-30 15:00:07
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