--- William Levak <wlevak@cyberspace.org> wrote:
> On Sat, 17 Apr 1999, Ethan Dicks wrote:
>
> > I re-found an old C-64... I know it's old because it has a 5-pin DIN
> > for a video connector.
>
> Only the original board had the 5 pin connector. This version was not
> compatible with PAL and was not sold in Europe.
Right... no PAL jumper in the video cage. Another sign of age: one ceramic
ROM and ceramic DRAM.
> > Inside, the board says Rev B in copper. Were any Rev A boards released?
>
> That must refer to the artwork and not the board itself as all rev. B
> boards had 8 pin connectors.
Other boards I have say "Rev B" in the white silk-screen. This has a small
legend in the middle of the board, on the opposite edge from the video
connector
ASSY 326298
REVB (C) 1982
COMMODORE 64
> > U5 is p/n 901225-01, U4 is p/n 901227-01, and U3 is p/n 901226-01, all
> > soldered in place.
>
> That's the first version of the ROM's
Right. The ROMs page on funet mentions that the RS-232 constants assume
a 1.0Mhz CPU (my guess is that they forgot to update the numbers from
the V(I)C-20. I used to use this with a VIC-modem, so at least at 300
baud, it's close enough.
-ethan
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