Interesting IBM 5150... or something
jws at jwsss.com
Wed Jun 10 01:40:39 CDT 2009
The CIA had devices which could read the screen contents from the
emitted EMF in the late 60s according to a friend who worked for them.
It is good to see the secure display is still with it.
I assume that emissions from the original keyboard would have been
suppressed as well.
The construction looks similar to the IBM Industrial AT's but I assume
with more attention to blocking emissions that could be intercepted. I
think the Tempest specs are public as far as emissions, as a lot of
manufacturers have to build equipment that is used in the environment
where security is required.
Really interesting find for someone who collects odd IBM Pc gear.
One of the oddballs that one might want to watch out for is a special
set of PC's that were made in Korea for supporting Hangul language for
IBM mainframe 3270 operation. When we got some of the units that were
supposed to connect up, they were running dos, and only in Hangul.
There was a need to support the special 16 bit data over 3270 that drove
the people who had to implement it nuts. But later we also used the
same terminals with a different program to support Kanji language
display. Again having to guess what the messages were in Hangul when
installing the floppies.
Brian Lanning wrote:
> On Tue, Jun 9, 2009 at 10:53 PM, Joe Giliberti<starbase89 at gmail.com> wrote:
>> Looks like an AT
> It has 3 half-height drive bay openings on the front. The AT had two,
> but an internal HH 5.25" bay where that bottom drive is (iirc).
> And the back of the case is totally different.
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