27 Jul
2006
27 Jul
'06
5:24 p.m.
Brad Parker wrote:
(sounds like a stevie wonder song, "r-g-b...and
l-c-d..." (ugg, clearly I've
had too much coffee).
I have an old computer from the '80s and it has a frame buffer with
RGB+S (sync) output on classic BNC connectors.
Couple of things:
1) I expect any modern LCD is going to want analogue colour signals
2) Some LCDs will probably only work with separate H/V sync lines - some will
be good enough to accept composite sync (such as your machine is outputting),
and some will probably work with sync on green too.
I don't think I've ever seen a machine with separate RGB BNC outputs that
presents a digital (TTL or otherwise) signal at the outputs - they've always
been analogue. Doesn't mean to say it can't happen, though.
If you've got a 'scope, put it on one of the outputs of your system and check
the peak voltage. If your LCDs have a VGA connector (as I suspect they have!)
then you can look up VGA signal levels on the 'net and just check that you're
not going to toast the LCD because the voltage at the BNCs is too high.
Other than that though, it probably stands a good chance of working, and you
won't cook anything by trying.
cheers
Jules
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