I just quickly went through the two pinouts and a lot of the pins on the surface seem to be the same, the keyboard & z80 pins can probably just be ignored. But I think the 2mhz mode would require quite a large change to the c64 motherboard. I don't think I've seen an 8566 datasheet, so you may have to reverse engineer the c64 & c128 motherboard to figure out how to adapt it. 8566 6567 -- 13 vdd (+12) -- 17 o0 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9 10 12 11 -- dmarqst? 12 16 13 10 14 11 15 -- dmaack? 16 14 17 15 18 -- 1mhz? 19 18 20 19 21 -- mux? 22 -- ioacc? 23 -- 2mhz? 24 20 25 -- z80phi 26 -- k0 27 -- k1 28 -- k2 29 21 30 22 31 23 32 24 33 25 34 26 35 27 36 28 37 29 38 30 39 31 40 32 41 33 42 34 43 35 44 36 45 37 46 38 47 39 48 40 On 05/08/2020 10:24, silverdr_at_wfmh.org.pl wrote: > >> On 2020-08-05, at 02:23, tokafondo <tokafondo_at_gmail.com> wrote: >> >> They should be called 8572/3, then shouldn't it? > Not necessarily at all > > 6526 -> 8521 > 6567 -> 8562 > 6569 -> 8565 > > and so on. > >> It seems the 8569 could be the nearest one, as it's the VIC-II included in >> PAL-N variant of C128. >> >> And I ask: can a '128 VIC retrofitted to a C64? > Never checked if VIC-IIe has only superset of VIC-II pins or there are differences in how they function (e.g. what clock output is set at power up). In the first case a passive adapter should allow such retrofit. >Received on 2020-08-08 12:00:02
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