[Coco] FD501

Mike Pepe lamune at doki-doki.net
Tue Nov 21 14:13:33 EST 2006

Chester A Patterson wrote:
> I picked up a TANDY FD501 complete. First original TANDY FD I've ever
> owned. Drive 0 only. Only one R/W head, unfortunately. What I find
> curious is that both the DS0 and the DS1 bridges are soldered (not to
> each other), as if the appropriate jumpers were in place. I checked the
> ribbon cable and it appears fully intact and original. I've not had the
> chance to try it out. Is it normal for these units to have DS0 *and* DS1
> jumpered? Can't figure that one out.

Yes. There may be a 'finger' missing in the connector for drive 
selection. If you do DIR 1 and drive 0 lights up, then something is 
indeed wrong.

> Other thing. The RS Disk Basic ROM is the old smaller variety. Is it
> possible to rig a 27xxx chip into there?

Yes, but the result is a little ugly.

> Thanks.
> /Chester

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