Space Duel PCB weirdness

Hello all - new to the list, but not arcade stuff :) Howdy from Texas!

Anyway, I have a Space Duel board that is behaving badly and I am stumped
as to what is going on.

The watchdog barks, so I disabled it, then looked at the CPU bus. It
appears to address memory for a few milliseconds, then completely stop - no
activity, address bus locked, data bus locked. Clock looks clean on the
scope and is operating at the correct frequency.

I would completely understand this happening if it was a processor that
supported halting or DMA, but the 6502 has no support for such things.

Anyone have a clue on what to look at next? I'm thinking its time to invest
in a logic analyzer.

Thanks,

Chris Brooks

---------------------------------------------------------------------------
** Unsubscribe, subscribe, or view the archives at http://www.vectorlist.org
** Please direct other questions, comments, or problems to chris@westnet.com
Received on Mon Jan 26 07:30:09 2009