21 May
1997
21 May
'97
2:27 p.m.
Computer Automation built a system for our Federal
Aviation
Administration called ARTS-II (Automated Radar Terminal System #2)
What you have may be part of that product line, an off-the-shelf mini
named LSI-II. The boards were huge with hundreds of chips and mounted
horizontally. The power supply was rated at 70 amps on the +5 line!
The boards _are_ horizontal, and would contain (I guess, from memory) a
couple of hundred chips. That's not what I'd call 'huge' - it's no
worse
than a PERQ board, or something like that. Even the first AT motherboard
(I think) contained over 100 chips and wasn't exactly small.
I doubt the PSU for my machine was 70A, though. It fits inside the
cabinet, and from what little I saw of it, it seemed to be a linear unit.
I'd have estimated about 30-40A on the 5V line.
Even if it was 70A, that's not that high - it's only 350W. I've got DEC
PSUs of twice that rating in use. I have a machine with _3_ 750W PSUs in
it. I suspect I can easily get enough current at 5V for this machine.
--
-tony
ard12(a)eng.cam.ac.uk
The gates in my computer are AND,OR and NOT, not Bill