10 Oct
1998
10 Oct
'98
6:13 p.m.
I worked at the Los Angeles Air Force Base in the mid 80's and
one of the requirements for personal computers of the time was
called TEMPEST. Computers meeting the TEMPEST specification
contained such hardware as necessary in order to ensure that
electromagnetic radiation emitted from the computer would not
be able to be monitored in such a way as to determine the use
to which the computer was being put. More simply, one would
not be able to eavesdrop on the computer user, since there would
be no discernable message in any electromagnetic radiation
coming from the computer. Perhaps this is what you have. This
would explain the extra shielding on cables and the double walled
chassis.
-----Original Message-----
From: Marvin <marvin(a)rain.org>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Date: Saturday, October 10, 1998 12:10 AM
Subject: New Acquisitions
We've all heard talk about how great amateur radio
events are for finding
good stuff. Tonight, I went to the Ventura Amateur Radio Club annual
auction and picked up some interesting stuff.
$ 1.00 IBM TPC (Tempest version of the IBM PC)
$ 5.00 Commodore 16 clean in the original box
$ 5.00 NEC PC-8201A in the original box
$ 1.00 Apple //e system w/ monitor, printer, numeric keypad
$ 2.00 Apple //e system w/ monitor, printer
$10.00 Commodore System w/ 1702 monitor, printer, etc.
$ 1.00 Collection of Apple ][ software
BTW, I have never seen (or heard) of the IBM TPC before. Anyone know how
common these things are? Both the monitor and keyboard have shielded
cables
running to the box (as expected) and it looks like the
box itself is a box
within a box.