[vcf-midatlantic] Shugart SA800-2 drives

[Jonathan Chapman]

That's usually a sign you're getting no index pulse, in my experience.

Thanks,
Jonathan

------- 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/