Re: Can anyone help me with TranswarpGS problems?

[mjmahon@aol.com (Michael J. Mahon)]

Tim Haynes wrote:

>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?

If you're having lockups after running a confidence test for a while,
they are very likely temperature-related.

As chips heat up, their timing margins deteriorate, and expose
marginal timing conditions.

If this is the case, trying to speed up your board may be a
bad move.  It sounds like something else (besides the processor)
is marginal--like the cache SRAM.

-michael

Check out amazing quality sound for 8-bit Apples on my
Home page:  http://members.aol.com/MJMahon/