[vcf-midatlantic] Shugart SA800-2 drives
kelly at catcorner.org
Tue Mar 22 13:00:06 UTC 2022
I know double sided and singe sided 8" disks have the index hole in different places. I can't tell from the manual (I'm too lazy) but does the SA800-2 have both circuits?
From: vcf-midatlantic <vcf-midatlantic-bounces at lists.vcfed.org> on behalf of Jonathan Chapman via vcf-midatlantic <vcf-midatlantic at lists.vcfed.org>
Sent: Tuesday, March 22, 2022 7:58 AM
To: mloewen at cpumagic.scol.pa.us <mloewen at cpumagic.scol.pa.us>; vcf-midatlantic <vcf-midatlantic at lists.vcfed.org>
Cc: Jonathan Chapman <lists at glitchwrks.com>
Subject: Re: [vcf-midatlantic] Shugart SA800-2 drives
That's usually a sign you're getting no index pulse, in my experience.
------- Original Message -------
On Tuesday, March 22nd, 2022 at 02:10, Mike Loewen via vcf-midatlantic <vcf-midatlantic at lists.vcfed.org> wrote:
> I have a pair of Shugart SA800-2 8" drives, which are mounted in a
> Micromation enclosure. Both drives have the factory jumper configuration,
> except for the B: drive which has the termination jumpers (T3, T4, T5 and T6)
> removed and DS2 installed.
> I've connected them to my media system via an older FDADAP board. Using the
> IMD program, I try and read a single-sided disk that has valid data. The drive
> selects and the head-load solenoid activates. After several seconds, IMD
> displays a "No interrupt from FDC" error. The same thing happens with both
> drives. The Alignment function doesn't recognize anything from the disk.
> I've successfully used this system with Tandon TM848-2 drives, and a
> Siemens 120-8. Before I start chasing signals, are there any obvious pitfalls
> to using a SA800-2 with a (relatively) modern PC?
> Should the DC (Disk Change) jumper be installed? By default, it is not. I
> noticed that on the Tandon drive, DC is installed.
> I have the operating and maintenance manuals for the SA800/801 drives.
> Mike Loewen mloewen at cpumagic.scol.pa.us
> Old Technology http://q7.neurotica.com/Oldtech/
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