10 Dec
2009
10 Dec
'09
6:04 a.m.
On Wednesday, December 9, 2009 at 19:04, Tony Duell wrote:
Very interesting. I've never seen another HP drive
unit (hard, floppy
or tape) that uses the 9914.
Early 9134As had third-party OEM controllers, which may explain it. The
later units had HP-supplied controllers that use 8291s.
OK. I will [l]ook at the manual on the Australian
museum site sometime.
Unfortunately, the manual has only block diagrams of the controllers,
although it does have schematics of the power supplies. It does have a
list of assembly numbers, which is useful, and some adjustment data.
Primarily, though, it has a fairly comprehensive description of the Amigo
protocol (~60 pages).
-- Dave