27 Jun
2005
27 Jun
'05
11:24 p.m.
On Tue, 2005-06-28 at 02:06 +0100, lee davison wrote:
We had something like this on a building security system, c. 1986, in
what was destined to be the Auckland Stock Exchange. We'd just finished
installing it on behalf of the manufacturers/suppliers, and they were so
pleased with it that they decided to take some photos of the various
cabinets.
On the first flash the whole system crashed, stopping anyone from
getting through doors or pressing lift (elevator) buttons. It wasn't
actually controlling the lifts themselves, that was probably still good
chunky flash-resistant relays.
The system recovered after a power cycle. They decided it would be a
good idea to cover the EPROMs with the nice metallised stickers, rather
than coloured paper ones.
--
Lawrence Wilkinson lawrence at ljw.me.uk
The IBM 360/30 page http://www.ljw.me.uk/ibm360
ps. are
2716's known for failure in this way?
Yes, especially if they've been flash photographed.
(Ididot photographer killed three of eight EPROMs
on a control system card after being told not to
use the flash in the equipment room.)