[Coco] Tandy Hard Disk Controller

[Neil Morrison]

----- 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.

Neil