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From: dalego@itx.isc.com (Dale Gogates)
Newsgroups: comp.unix.sysv386
Subject: Re: MFM/RLL Disk Driver for ISC or ESIX?
Message-ID: <1991Jun11.211627.10459@ism.isc.com>
Date: 11 Jun 91 21:16:27 GMT
References: <1991Jun11.121605.11455@crash.cts.com> <16938@darkstar.ucsc.edu>
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In article <16938@darkstar.ucsc.edu> daniel@cis.ucsc.edu (Daniel Edelson) writes:
>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 ....
>
>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?

STB, Richardson TX has an MFM controller that lets you change the INT to
15.  I had to buy one last week, it also has 32K cache, mail order prices 
< $100.
They also have RLL and IDE controllers, but I have not first hand experience
with them.
--
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