On 2012-10-18, at 18:52, Gerrit Heitsch wrote: >> Why stop there? Replace the TTL with micro-sized versions, mount them inbetween the pin header on the bottom, and make the board the same size as the eprom! >> Just kidding! ;-) > > No, the next step would be to design one such circuit for a 250469 board, the one where the BASIC and KERNAL are in one ROM and only the char-ROM is extra. > > Should be a bit easier since _KERNAL and _BASIC are already added together by an AND gate on the board. That way one doesn't need a 74LS11, a 74LS08 should do. I just had a look at the schematics of the narrow board and I wonder what the A14 is doing at the U4 (23128).. -- SD! Message was sent through the cbm-hackers mailing listReceived on 2012-11-23 18:00:14
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