Tandy 2000 Floppy Drive Replacement

[Marvin Johnston]

On Fri, 13 Oct 2006, Fred Ciscin wrote:

> The Tandy 2000 uses a 720K 5.25" drive.  DSDD 96tpi.
> Matsushita (Panasonic, Shugart, etc.) 465
> Tandon TM100-4
> Teac 55F
> etc.
> 
> SOME 1.2M drive could work.  They need to be jumpered to 300 RPM, "low
> density" recording current, etc.

First, what other machines used a 5 1/4" 720K drive? I've been looking through
the stash, and so far I haven't found anything.

Second, IIRC the speed and "low density" recording current are set with jumpers.
What is the etc.?

I might add that when connecting a standard 360K drive, the light comes on and
stays on, and the drive continues to spin when a disk is inserted. This gives me
the impression that there may be something wrong with the disk controller for
the Tandy 2000. The cables for the 2000 are straight-thru, so I rejumpered the
drive to the first drive (D0 of 0-3 or D1 of 1-4.) And yes, I checked and double
checked to make sure that pin 1 on the motherboard matches pin 1 on the drive!

Thanks!