Tandy and Amstrad machines had one accessory available
that AFAIK was not
avaialbe for other clones (it was avaialbe for IB< 5150/5160/5170
machines). This accessory is rather important to me. I refer, of course,
to a schematic diagram.
-tony
The Tandy 2000 tech manual even included circuit board artwork. IINM IBM's extensive
documentation didn't have that. They did include rom sources though, which Tandy
didn't.
I've seen a fair amount of tech manuals. It's hard to beat these 2.