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Date:      Thu, 6 May 1999 14:38:09 -0600 (CST)
From:      Theodore Hope <freebsd@iguana.internexo.co.cr>
To:        hamellr@dsinw.com (Rick Hamell)
Cc:        christopher_booth@mcgraw-hill.com, freebsd-questions@FreeBSD.ORG, cbooth@aixx.net
Subject:   Re: IRQ #s
Message-ID:  <199905062038.OAA16340@iguana.internexo.co.cr>
In-Reply-To: <Pine.WNT.3.95.990506130954.-70647C-100000@akane> from "Rick Hamell" at May 6, 99 01:15:41 pm

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> Common IRQ Usage
> 
> 
> IRQ 1&2 =System IRQs (2 is free on some older systems, mostly with Arcnet)
> IRQ 3= Com 2/4
> IRQ 4= Com 1/3
> IRQ 5= LPT2, Usually free though, sound cards are common, as is COM 3
> IRQ 6= Floppy/System
> IRQ 7= LPT1 - Should always be here, many programs will not print if it's not
> IRQ 8= System
> IRQ 9= Video/System
> IRQ 10= Free, usually the best place for Network cards
> IRQ 11= Free, good for PNP modems using Com3
> IRQ 12= Free, best for SCSI controllers. *****
> IRQ 13= System
> IRQ 14= Primary HDD
> IRQ 15= Secondary HDD

**** PS/2 mouse often shows up at IRQ 12.


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