Re: Help needed

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#161

From: Karl Princl
Date: Sun, 05 Jan 1997 00:00

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Regarding James' reply...

The floppy drive does not use DMA 1. Here is a list of common IRQ and DMA
usage in most PC implementations:

IRQ 0:		Timer 0
IRQ 1:		Keyboard
IRQ 2:		Cascadable interupt from slave 8259 interupt controller
IRQ 3:		COM port 2
IRQ 4:		COM port 1
IRQ 5:		LPT2 (if installed)
IRQ 6:		Floppy disk controller
IRQ 7:		LPT1
IRQ 8:		CMOS real time clock
IRQ 9:		Free (emulates IRQ2 for XT compatibility via BIOS)
IRQ 10:		Free
IRQ 11:		Free
IRQ 12:		PS2 Mouse (if installed)
IRQ 13:		Numeric coprocessor
IRQ 14:		IDE Hard disk controller
IRQ 15:		IDE Hard disk controller (if installed)

DMA 0:		Free
DMA 1:		Free (typically used by sound cards)
DMA 2:		Floppy disk controller
DMA 3:		Free (typically used by ECP port)
DMA 4:		Cascadable DMA from primary 8237 DMA controller
DMA 5:		Free (typically used by 16bit sound cards)
DMA 6:		Free
DMA 7:		Free

If anyone can update this list, please do so.

Karl Princl
kprincl@techcom.on.ca
Hardware Development/MIS
Dynamic Visions Ltd.

James Sheldon <nfalcon@bellsouth.net> wrote in article
<MPG.d399c8594b2824f989685@news.bna.bellsouth.net>...
> In article <01bbfa7f$2a8265c0$0b33abce@maxman.speedlink.com>, 
> maxman@speedlink.com says...
> > I have a new asus motherboard model P/1 P55T2P4 with a new 200 intel
cpu
> > All my periphials are new.
> > I seem to loose my a drive every other day, and now today it's my d
drive i
> > reboot I see it load the driver and the led comes on it just wont
access
> > it.
> > Same problem with My A drive yesterday disk in light on drive spinning
then
> > cannot read from drive a.
> > Please help I'm mucho in debt.
> 
> I would start by checking to make sure that you don't have a DMA 
> conflict, although it's not as likely to cause the HD going out, but with

> the problem with the floppy, this is a hi probability. The likely culprit

> is either a sound card or a CD-Rom card having a DMA channel that is set 
> to one which by default is what the A drive will use.
> -- 
> James Sheldon
> AKA Night Falcon
> e-mail:nfalcon@bellsouth.net
>

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References: <01bbfa7f$2a8265c0$0b33abce@maxman.speedlink.com> <MPG.d399c8594b2824f989685@news.bna.bellsouth.net>

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From: "Karl Princl" <kprincl@techcom.on.ca>
Subject: Re: Help needed
Date: 1997/01/05
Message-ID: <01bbfb3f$8ca11920$0bd8cfcd@saruman>
X-Deja-AN: 207907819
references: <01bbfa7f$2a8265c0$0b33abce@maxman.speedlink.com> <MPG.d399c8594b2824f989685@news.bna.bellsouth.net>
organization: Dynamic Visions
newsgroups: comp.os.ms-windows.setup.win95,demon.ip.support.win95,microsoft.public.win95,microsoft.public.win95.filediskmanagement,microsoft.public.win95.multimedia,microsoft.public.win95.setup

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