Thanks for the advice. Amiflash said successful. I Haven't been able to trigger the dual bios so far. Any suggestions? The regular AMI recover process produced nothing, didn't even floppy seek.
Tried AMIBOOT.ROM method a dozen times with no success, but had HDD plugged in. Will try again tonight sans HDD. If that fails I'll try shorting the chip. Only a cheap old mobo anyhow.