Re: IRQ2 or IRQ5

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#1110

From: Fuzzy Fox
Date: Mon, 11 Jan 1993 16:58

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>>Now I have a 386-SX system.  IRQ 2 doesn't work anymore.  All docu-
>>mentation I have read has said that IRQ2 is a "cascade" interrupt.
>>WHAT DOES THIS MEAN, AND HOW DO I MAKE IT WORK????

The IRQ2 is used by the second interrupt controller.  Interrupts coming
in on IRQ2 are vectored to IRQ9 instead on a PC-AT.  You can leave your
hardware interrupt on IRQ2, but expect the interrupt vector to be IRQ9
on the software side.

-- 
#ifdef TRUE        | Fuzzy Fox (a.k.a. David DeSimone)       fuzzy@netcom.com
#define  TRUE   0  |
#define  FALSE  1  |  "911 Emergency Rescue Service - Can you hold, please?"
#endif             |

Technical Details

Message-ID: <1993Jan11.165837.6119@rei.com>

Path: arc1-ca.pugleaf.net!sparky!uunet!rei2!fox

References: <1993Jan7.122713.17450@walter.cray.com> <zvtTrAsDBh107h@dadstoy.gbdata.com>

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Newsgroups: alt.msdos.programmer,comp.msdos.programmer,comp.os.msdos.programmer,comp.sys.ibm.pc.programmer
Path: arc1-ca.pugleaf.net!sparky!uunet!rei2!fox
From: fox@rei.com (Fuzzy Fox)
Subject: Re: IRQ2 or IRQ5
Message-ID: <1993Jan11.165837.6119@rei.com>
Date: Mon, 11 Jan 1993 16:58:37 GMT
References: <1993Jan7.122713.17450@walter.cray.com> <zvtTrAsDBh107h@dadstoy.gbdata.com>
Organization: Recognition Equipment, Inc.
Lines: 14

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