🚀 go-pugleaf

     -=> Khan spoke of "Re: vertical retrace inte" <=-
    To All at 08-10-92  13:49
 Kh> Really? Then why can my COM1:, which is on the motherboard, coexist
 Kh> with my COM3:, which is on a separate modem card? Both generate IRQ4.

Are they on the same board?  If so thier isn't a problem.  You
see it  or more interupts on SEPERATE boards that's the problem
not the SAME board
 
 Kh> What's your source for this?

Try the IBM technical reference the guys who designed the
machine.  It's not say you CAN'T share interupts you CAN.  YOU
can't share them with seperate boards.  IE a internal modem card
for com1 and one for com3.  You can't do this unless the
interupts are channel through to a single IRQ pin on a card [this
is tricky and will make a mess do to clip leads and solder mask
cutting].

        Stephen Cyberman@Toz.Buffalo.NY.US
        Scripted at Tue  08-11-1992  09:40:46

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