On Thu, Jun 14, 2018 at 3:22 PM, Michał Pleban <lists@michau.name> wrote: > Hello! > > Francesco Messineo wrote: > >> yes I know how to count macrocells, I just didn't check how many would >> be needed for a 6526. >> 128 is quite a lot I would think. > > A very crude calculation: > > * Two 8-bit ports with direction pins: 2x2x8 = 32 > * One 8-bit serial port = 8 + some unknown overhead > * Two 16-bit counters with preset = 2x2x16 = 64 > * TOD clock with alarm: 2x28 = 56 > * Interrupt logic = unknown, but I would assume at least 8-16 > > That is already way over 128. yes, looks like hopeless on a single ATF. And Intel didn't like to support old Altera cplds... A 6502 to 7501 adapter (which was my original intention) would fit anywayReceived on 2018-06-14 16:00:46
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