[FADCA] Shared IRQs

[Charles S Schuman]

Last week I added a old two port Serial board to the "box". As soon as I 
configured it into the FPAC system it's
companion port stopped working. By companion port I mean the port that 
shares the IRQ. The ports work w/ Buxterm,
but that uses only one port at a time. A second card yealded the same 
results. Since these cards are OLDes there is no way to
move the IRQ to anything other than 4 or 3. So... how do we deal with 
ports that have to share IRQs?

Moving right along  I grabbed up a modern PCI card w/ two ports. It 
configures itself, with a DOS utility, to FCE0h/ FCE8h  IRQ 9.
You would n't believe what happen when you try to use those adddresses! 
FPAC starts up normally & everthing is cool  - til
you try to use the port. The screen goes black & it's down hill from there.

I guess I should stick to the beaten path but, at my house it's just the 
way things go. :-\