|"looks like a 16 bit ISA board with daughter boards, etc., on it."|
Yeah, I've run across a few of them (but not that specific model). Basically, it's designed to upgrade an older machine to run faster (like an entire motherboard on a ISA plug-in card). Some of them were able to disable the rest of the machine and pretty much ran entirely off of power in the slot---but these were "hungry-mothers", and I remember one having almost burned up the ISA slot from drawing so much power. I suspect birdman63 has an issue where whatever he's running is incompatible with anything but this model...it happened more often back in the "good-old-days" than you might think.
"Channeling the spirit of jboy..."