[Coco] Tandy Hard Disk Controller

[Peter Wemm]

On Friday 03 March 2006 10:46 am, Neil Morrison wrote:
> ----- Original Message -----
> From: "Gene Heskett" <gene.heskett at verizon.net>
>
> > Did they actually ever *sell* one?  I looked at the one the local
> > shack had, but at $129.95 I couldn't bring myself to write the
> > check, NDI what ever became of it.  AIUI at the time, it also
> > required another interface controller card between its cable and
> > the drive proper & nobody had a clue as to what it might be
> > required to do, or if it was even available.  It had a maximum of 3
> > 16 pin dips in it that even if gold plated, couldn't convince me it
> > was worth the asking price.
>
> IIRC, you needed a R/S 'Primary Drive', which contained the HD
> controller. This was the standard R/S setup. The VERY expensive
> 'Tandy Hard Disk Controller' was just a very simple interface with a
> few chips.
>
> I'd like to get a schematic for it - never found one.

It wouldn't be hard.  It is a PCB with just 3 or 4 74LS style chips on 
it.  I'll take a shot at it someday.  It is a simple bus adapter.

-- 
Peter Wemm - peter at wemm.org; peter at FreeBSD.org; peter at yahoo-inc.com
"All of this is for nothing if we don't go to the stars" - JMS/B5