COPS 421 info

From: Chuck Simmons <numa_at_email.domain.hidden>
Date: Wed, 16 Aug 2000 16:41:41 -0400

Hello all,

Just wondering if anyone on the list has any information about the COPS 421 microcontroller on the I/O board. I have an I/O board that gives me boot error 52 and I have been unable to find any information on the Internet about it. Datasheets, timing diagrams, a copy of the firmware (if there is any), or any other tidbits would be most appreciated. I suspect that C36 may be bad instead of the COPS, but I haven't tested the capacitor yet. If the COPS does turn up to be the culprit, I will try to kludge an emulation of it using another microcontroller and of course make the hack available to everyone on the list as I hear this is a common problem with Lisas.

Thanks a bunch,

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