Null job light patterns?
ard at p850ug1.demon.co.uk
Mon Jan 29 16:56:57 CST 2007
> RT11 would run one led in from the left side and one from the right side
> until they collided in the middle and kind of bounced off each other. RSX,
The RT11 pattern I rememebr was something like (I may have got the
And so on, with the colum of lit bulbs getting shorter by one every time
it hit an end, until there was just one lamp on, When that got to the
appropriate end, the pattern restarted with all 16 lamps on.
This only worked on processors with a lamp register (like the 11/45 and
11/70). It was farily easiy to find the appropriate address in the source
code, change it to point to a 'spare' parallel' port (DR11K or
something), and then connect that to flashing lights. Made a _really_
expensive Newtonsday decoration...
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