From: Bernd Meyer (umisef@mcshh.Hanse.DE)
Date: 10/03/92


From: umisef@mcshh.Hanse.DE (Bernd Meyer)
Subject: Re: 0.98 and serial ports, IRQs
Date: Sat, 3 Oct 1992 11:09:11 GMT

tytso@ATHENA.MIT.EDU (Theodore Ts'o) writes:
> 6. If I set 2 ports to the same IRQ, do they also share the COM address.

>You don't want to do this; if you do, both ports will conflict with each
>other and both will not work. Either trying to setting both ports to
>use the same IRQ or use the same COM address will cause you to lose.
>The only exception is on multi-port boards which are *designed* to allow
>ports on that card to share a single IRQ, such as the AST Fourport card.

> - Ted
Well, my cheapo Multi-IO cards do this as well. This text is written on
a linux system connected to my host via Highspeed modem, which in turn is connected
to one of four serial lines two multi io cards give me. Both are using IRQ
3 and 4. Only bad thing is that I can only use 2 of them at a time with linux
(not to speak of dos). Anyone having any ideas as to what Interrupts might
still be free in a machine with
-Soundblaster PRO
-ET 4000
-ESDI Controller
-Logitech scanner (anyone specs for it? Would like supporting it!)
.

Bernie

umisef@mcshh.hanse.de