On Thu, Jun 14, 2018 at 2:48 PM, Michał Pleban <lists@michau.name> wrote: > Francesco Messineo wrote: > >> the 1508 has 128 macrocells, the EPM7256E has 256 macrocells. >> An ATF1502 can fit a 24 I/O pins with separate DDR control on each >> pin, it's in the >> examples of wincupl. > > That's for sure, but 6526 is much too more than a few I/O chips. You > have two 16-bit counters, interrupt logic, TOD clock, serial port etc. > All this uses macrocells - basically you need to counf one macrocell for > every bit that is being latched in aby way, plus extra macrocells for > some decoding logic etc. I counted all the latches in the 6526 once and > the result was more that 128. 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. > > I wasn't aware of the 256-cell CPLD though, I work with the Ateml ones. > That one might be big anough, but can you still purchase it in bigger > quantities? The Atmel chips are still being made, wheread the Altera one > have been discontinued long ago. yes EPM7xxx can still be found, but Intel made them very expensive after they bought Altera, basicly they're not a real option anymore :( FReceived on 2018-06-14 15:02:13
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