----- Original Message ----- From: "Marko Mäkelä" <email@example.com> > I was thinking of a somewhat simplified design. First of all, I'd omit > the "interrupt after transfer" feature, since it is pretty useless. When > it is enabled, the CPU will be interrupted right after the write command > (to $df01 or $ff00) that initiated the transfer. Also, I don't know if > the verify and swap commands are worth the trouble. I don't see how you > could use an 8-input and gate in the verify operation. Of course there > are bigger logic chips than the 2064. Maybe the 2096 would be big enough > for implementing also an Action Replay like device in addition to a fully > backwards compatible REU clone. > Marko Makela- I would go for a bigger logic chip. A full REC emulation is needed to ensure that no Commodore programs are 'broken' by less than 100% REC compatibility. For example, GEOS uses the hardware SWAP feature, so it is indeed worth the trouble. Enjoy. -Todd Elliott Message was sent through the cbm-hackers mailing list
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