Den Thu, 14 Jun 2018 20:49:14 -0500 skrev Jim Brain <brain@jbrain.com>: > xc95288xl is a 288 macrocell 5v tolerant CPLD. ~$USD5.00/piece in > singles. $USD5 is a bit too near the limit where it starts to be economically feasible to scrap fully working C64's for parts. (Say that with a PCB, some various passive components and the assembly work it might land on $10 for a CIA replacement. That's $20 for two CIA's, and then there is VIC, SID and PLA that you can get money for, which is scaringly near the price levels for a C64 with no accessories (i.e. no PSU). OTOH, for a project like the 8088 card for CBM-II, there are so few original 8088 boards that the price level isn't that fixed and most importantly the CPLD emulating a 6526 can sit directly on the 8088 board, removing a small extra pcb and various passive stuff from the calculation. For the 8088 board, one or rather two CPLD's might be able to emulate a 6526 connected to a 6525 (or rather 6523, as the 8088 board afaik won't need the interrupt controller in a 6525, which makes emulation a bit easier). -- (\_/) Copy the bunny to your mails to help (O.o) him achieve world domination. (> <) Come join the dark side. /_|_\ We have cookies.Received on 2018-06-16 06:00:17
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