From: James L. Paul (james@netcom.com)
Date: 07/24/92 

From: james@netcom.com (James L. Paul)
Subject: IRQs and 0.96c PL2. I'm still confused!
Date: Fri, 24 Jul 1992 18:00:10 GMT

I just got everything upgraded to 0.96c PL2. SLICK! Except...

I'm trying to use all 4 of my serial ports. I have 2 cards, each
with 2 ports. One card uses 2 16550 UARTs. I've tried various IRQ
setups, but haven't gotten things to work yet.

Right now I have:

COM1 IRQ 4
COM2 IRQ 3
COM3 IRQ 5
COM4 IRQ 2

When booting, Linux says that COM3 and COM4 have the same IRQs as
COM1 and COM2, respectively. Like this:

COM1 IRQ 4
COM2 IRQ 3
COM3 IRQ 4
COM4 IRQ 3

Linux does this no matter how I have the IRQs set up. Why, and how
do I fix it?

BTW, the first 2 ports work properly, but the last 2 don't, obviously.
I can send data out the port, but nothing can get in. I assume this IRQ
problem is at the heart of the matter.

Sorry if this is a FAQ, but I haven't seen it! 

-- 
James L. Paul

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