Some interesting chips

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I've just been sent some chips from what I believe was a Commodore repair
facility here in the UK. There are some uninteresting production ROMs,
some EPROMs and some other chips.

There are some EPROMs claiming to be 1571 beta ROMs, Script Plus Hi
and Lo EPROMs, a C128 EPROM, a "Tool Kit" EPROM and some less identifiable
EPROMs. I'll try to get these dumped ASAP. There's also a 6569R1, another
purple ceramic chip with gold pins which I think is an Intel chip and
finally three 8563s. The revisions on these look like early production
chips (possibly with bugs) so I am listing them in full:

MOS
8563R6  4C
1285

MOS
8563R7A
1885

There are two of the latter chip. I've read hacker documentation advising
the use of R8 or R9 chips, so does anyone know what the bugs are with
these earlier chips?


Richard


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