CA 'Naked Mini'

From: A.R. Duell <>
Date: Wed May 21 21:27:11 1997

> 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.

The gates in my computer are AND,OR and NOT, not Bill
Received on Wed May 21 1997 - 21:27:11 BST

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