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From: daniel@cis.ucsc.edu (Daniel Edelson)
Newsgroups: comp.unix.sysv386
Subject: Re: MFM/RLL Disk Driver for ISC or ESIX?
Message-ID: <16938@darkstar.ucsc.edu>
Date: 11 Jun 91 18:18:41 GMT
Article-I.D.: darkstar.16938
References: <1991Jun11.121605.11455@crash.cts.com>
Sender: usenet@darkstar.ucsc.edu
Lines: 21

In article <1991Jun11.121605.11455@crash.cts.com>, jca@pnet01.cts.com (John C. Archambeau) writes:
|> mdm@cocktrice.uucp writes:
|> >Does anyone have a disk driver which would provide support for MFM/RLL drives
|> >attached to a second controller? 
|> 
|> The driver should work as is ....
|> 
|>      // JCA
|> 

The problem is that it's virtually impossible to find an MFM/RLL controller
that can use a secondary IRQ. They all seem to be hardwired for 14 (or is it 15,)
unlike the ESDI controllers which are often jumper selectable. One way around
it is to mess with the second controllers edge connector, but this is kind of 
messy. If anybody knows of an MFM/RLL controller that is jumper selectable to
IRQ 15, would they care to post that information?
-- 
---
Daniel Edelson                 |  ``Recycle your garbage. Please don't
daniel@cis.ucsc.edu, or        |    make me come and copy after you.'' 
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