Path: utzoo!utgpu!jarvis.csri.toronto.edu!clyde.concordia.ca!uunet!wuarchive!zaphod.mps.ohio-state.edu!sol!sdsu!crash!pnet01!cwr
From: cwr@pnet01.cts.com (Will Rose)
Newsgroups: comp.os.minix
Subject: Re: Read/write of 1.44 mb disks
Message-ID: <1004@crash.cts.com>
Date: 29 Dec 89 08:16:03 GMT
Sender: root@crash.cts.com
Organization: People-Net [pnet01], El Cajon CA
Lines: 22

I modified the vn 1.4 driver slightly, to get it to read 1.44 MB disks on an
XT - MINIX believes only AT machines have the fast DMA, and you have to set a
flag "pc_at" (I think) in a couple of places to get the DMA set up at the
right speed.
 
If you are using an AT anyhow, then device size seems the only possible hitch.
I made up a couple of new devices for the 1.4 drive, because at0 and at1 have
a size of 1.2 MB.  I keep meaning to find out how this size is set, so that I
can edit it with de, but I haven't yet done so.
 
Hope this helps - Will
 
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