Xref: utzoo comp.sys.ibm.pc.hardware:2600 comp.sys.ibm.pc.misc:3069 comp.os.msdos.programmer:1700
Path: utzoo!attcan!uunet!cos!hqda-ai!media!csense!bote
From: bote@csense.uucp (John Boteler)
Newsgroups: comp.sys.ibm.pc.hardware,comp.sys.ibm.pc.misc,comp.os.msdos.programmer
Subject: Re: DMA channel asignments
Keywords: DMA Adaptec
Message-ID: <1990Oct27.051739.9545@csense.uucp>
Date: 27 Oct 90 05:17:39 GMT
References: <200@kumr.UUCP>
Followup-To: comp.sys.ibm.pc.hardware
Organization: Common Sense Computing, McLean, VA.
Lines: 24

pozar@kumr.UUCP (Tim Pozar) claimed:
>    I am currently working on a driver for a very fast serial port.
>I am interested in using one of the DMA channels on the AT.  (I expect
>that this driver will be used on mainly '386 systems.)  I am trying
>to find out what has been assigned to which channels on the DMA(s) on
>the XT and AT.  

That's gotta be one helluva fast serial port!

Being a good programmer  :)  I am sure that you will provide
the user the option of selecting these parameters, rather
than hard coding them into your driver.

If it helps you, the Adaptec 1540B SCSI host adapter I just
installed uses DMA channel 5, with jumper options to select
many other channels. I believe there to be many more DMA
channels provided on AT class systems than there were on
the now-ancient PC class architecture.

Good luck.

-- 
John Boteler   bote@csense                {uunet | ka3ovk}!media!csense!bote
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