RE: C128 repair advice...
Date: 2002-02-26 10:11:49

Hallo Bo,

Yesterday I finished it so far that the only thing I have to add to the SCH
are the two headers. After that I'll give it a try to polish it up a bit ie.
re-group the components plus double-check the connections. Then I'll make a
description of the whole SCH.

> Does it look like something folks would be able to duplicate?

IMHO, yes.

> Are there any really hard-to-find chips on there?

The 6525A. Even I don't have any spares :( The C-port is not used AFAIK. But
after reading the docs I noticed one bit of port C can be used as
interruptline. I'll check that this evening if possible. 
If not all funtions/ports are used, I wonder if it would be possible to use
a 6526, 6522 or, in the worst case, plain TTL-registers/latches.

Another solution is to replace the 6525A by a 6526A and change the BIOS. But
as I haven't any idea at all if this will have impact on existing software,
this is the last thing I would do. 
   / __|__
  / /  |_/     Groetjes, Ruud
  \ \__|_\


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