The TRS-80 Journey Continues

Mike Loewen mloewen at
Thu May 5 12:34:27 CDT 2022

On Thu, 5 May 2022, Bill Gunshannon via cctalk wrote:

> Next step...
> Apparently mu original Tandon floppy has bought the farm.
> Does anyone know what the jumper setting are for a
> TEAC FD-55GFR-149 for the TRS-80 4P?
> I tried the usual (like for a DEC RX-33) but that didn't
> fly.  Every sector fails verify after a format.  I am sure
> it's a jumper thing.

    The FD-55GFR is a 1.2MB drive, double-sided. The Model 4P used 360K drives 
(possibly Teac FD-55A), single-sided as installed at the factory. Are you sure 
that's the model number that was in your 4P?

Mike Loewen				mloewen at
Old Technology

More information about the cctalk mailing list