I don't
want to rain on your parade, but just a suggestion - a motherboard
with an ISA slot is now almost impossible to find, new of course. And
a serial port is a bit slow.
THis is a major problem, I am told. There are lots of custom ISA cards
(varios special-purpose interfaces, measurement systems, etc) that never
had PCI equivalents. There's nothing to plug them into when the old
ISA-capable motherboards die. And of course (as I've moaned about several
times), service docs and spares for PC motherboards are somewhat rarer
than PERQ T4s...
-tony