Thanks to Mark, Glenn, and Wayne for their suggestions regarding replacing
the CPU on my TWGS. I did the swap today, and have posted some pictures of
the work to my website again (www.csclub.uwaterloo.ca/~tshaynes/TWGS). The
new pictures are dated today (July 4).
I had to remove a plastic collar from around the CPU, and I did that with
tiny screwdrivers. after that, replacing the chip was easy. I considered
drilling a small hole through the bottom and pushing it out, but you can see
that that would be inadvisable as there seem to be some metal contacts on
the top of the PCB beneath the socket that are not visible from beneath the
PCB.
Anyway, I swapped in the faster CPU and got a clean bootup right away (even
without putting the plastic collar back on the socket!). The very last
picture I posted shows the TWGS booting up minus the collar on the socket.
Heh.
So I have it running a continual self-test. After about 20 minutes, have
been getting one freeze-up or another (last time it was socket slowdown
test)... before that, it was a lockup on a RAM test).
Does anybody know a good source for 50MHz half can crystal?
George from Michigan mentioned in email that someone at one point was
selling (for $10) gold plated chip/ribbon connectors. Does the person who
used to make them still come around? Does anybody remember who that was?
Was it Joachim?
Thanks again
Tim