1 Jul
2006
1 Jul
'06
7:40 p.m.
> And I doubt the parallel port would be fast
enough. Best plan would
> be a pair of DACs, a counter and a 16-bit EPROM (or a pair of
> 8-bits). Program the ROM with the pattern data, hook up a display
> and have fun. [...]
The "problem" here is you can't easily
change the "display".
Then use RAM instead of ROM, and add a little electronics so that the
host can grab control of it long enough for a write cycle. The display
will glitch while you write, but for the thing as described that's no
biggie, since you'd write very seldom. If you have intensity control
on the 'scope, you could even use the write signal to turn the beam
off, so glitches would be less visible.
der Mouse