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Thread View: comp.sys.zenith
3 messages
3 total messages Started by RFM Thu, 05 Jul 1990 21:46
RLL controllers in Zenith systems
#222
Author: RFM
Date: Thu, 05 Jul 1990 21:46
5 lines
691 bytes
I have a Zenith Z-159 (XT-Level) with a Seagate ST251-1 40-meg drive.
I'm thinking about putting an RLL controller in my machine to get some more
space on my disk, but I have a nagging thought that Zenith machines won't
work with RLL. Anybody know anything about this? Thanks. Bob M., PSU-
Harrisburg.
Re: RLL controllers in Zenith systems
#223
Author: RAMontante
Date: Fri, 06 Jul 1990 02:08
11 lines
1072 bytes
My z-158 is running one of the earliest Adaptec RLL controllers quite
happily.  This controller, and probably others, are not recognized
properly by the monitor ROM, so that no matter how I reboot --- straight
reboot or ROM-monitor command --- the machine always tries to go the
floppy drive before using the hard disk.  Since I never store floppies in
the floppy drive, this merely slows down the boot by a second or three
(out of 60 or so to get all the EMS, TSR, and other goodies loaded up).

The z-159 ROM is surely newer than mine, and may do a better job of
identifying non-Zenith controllers, but it really isn't a problem anyway.
I would expect an RLL controller to work fine.
Re: RLL controllers in Zenith systems
#224
Author: Bill Mackinnon
Date: Mon, 09 Jul 1990 12:34
12 lines
1147 bytes
From article <90186.174616RFM@psuvm.psu.edu>, by RFM@psuvm.psu.edu:
> I have a Zenith Z-159 (XT-Level) with a Seagate ST251-1 40-meg drive.
> I'm thinking about putting an RLL controller in my machine to get some more
> space on my disk, but I have a nagging thought that Zenith machines won't
> work with RLL. Anybody know anything about this? Thanks. Bob M., PSU-
> Harrisburg.

The RLL controllers should work in your machine. You might need a ROM upgrade.
Do not , however, try to format your st251 with an RLL controller. RLL 
controllers should be used with RLL drives only. You are just looking for
trouble if you use MFM drives with RLL controllers.
Bill MacKinnon
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