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From: rcd@ico.isc.com (Dick Dunn)
Newsgroups: comp.unix.sysv386,comp.unix.xenix.sco,comp.sys.ibm.pc.hardware
Subject: Re: WD8013 & SCO UNIX
Summary: the IRQ 2/9 game again??
Message-ID: <1990Oct18.185119.18956@ico.isc.com>
Date: 18 Oct 90 18:51:19 GMT
References: <65191@iuvax.cs.indiana.edu> <BJi8q1w163w@mudos.ann-arbor.mi.us>
Organization: Interactive Systems Corporation, Boulder, CO
Lines: 17

mju@mudos.ann-arbor.mi.us (Marc Unangst) writes:

> IRQ 2 can be flakey under Unix because it's usually rerouted to IRQ 9;
> under DOS, you don't see this, but under Unix, it quickly becomes
> apparent...

No, this is just wrong.  IRQ 2 does not exist on an AT bus, period.  The
position on a PC-bus connector corresponding to IRQ 2 is the same as the
position on an AT-bus connector corresponding to IRQ 9.  Period.  If you
take a card designed for the PC, set it up to generate IRQ 2, and plug it
into an AT-bus machine, it will generate IRQ 9.  Nothing flakey about it.
This re-routing is pure hardware, and UNIX deals with it just fine.

(Isn't this in the FAQ?)
-- 
Dick Dunn     rcd@ico.isc.com -or- ico!rcd       Boulder, CO   (303)449-2870
   ...Never offend with style when you can offend with substance.