9 Oct
2002
9 Oct
'02
6:59 a.m.
Last night I
rescued two Ohio Scientific systems:
Congrats!
A challenger C1P and
Plastic or metal case? A Challenger
II (which was a MUCH bigger box, and had a matching big,
heavy dual 8" floppy cabinet).
Blue/black or tan/brown? The haul also
included an ADM-3A terminal (always wanted one of
these), and a dual 5 1/4" floppy cabinet (don't know which system
this goes to).
I would like to see a picture of this. It's probably not OSI.
I got no documentation, no software or anything
(these were all picked up from a curb-side garbage pile!!)!
Lucky, lucky lucky! Where? Any pointers
to documentation, software, specifications, etc??
I have lot's of docs, etc. for OSI. OSI is the principle focus
of my collection. I've read
the stuff on a careful process to power-up an altair...does
this apply to these systems too (I don't have much in the way of
electronic test equipment or power supplies).
OSI uses regulated supplies. Generally, they either work or they don't.
I've never had one zap anything... but anyway, the 5 volt supply in the
C1P is easily disconnected from the main (and only) board. Put a dummy
load on it and check. 4.7 to 5.3 is cool.
The Chal. II will probably have a PowerOne supply (again, very reliable
in my experiance). Pull all of the cards from the "fatherboard" (you'll
need to anyway, just to reestablish contact) (the order of the boards on
the bus does not matter) and put dummy loads and check voltages on the
following pins (counting 1 to 48, top to bottom):
23 - +12
24 - -9
25 - +5
26 - +5
27 - gnd
28 - gnd
Man...I hate to think of these classic's
going landfill...... gotta
save 'em all!
Contrats again!