I am looking for a design to take some exsisting CGA 15khz to 25khz TTL monitor source scan rates to VGA , Anyone here seen anything that might be a place to start? Converting TTL to analog is not a problem,. its the scan rate. Al
wtd:Scan doubler circuit
Apr 25, 2005
6 Replies
why, why, why?
If you would like to waste money why don't just send me some?
I think all you have to do is change some capacitors, the multi sync monitors have a bunch of relays they switch over, how big is your CGA? a VGA
14" CRT monitors are dirt cheap now.I cannot find any present VGA monitors that scan at 15~25khz A.
is this what you're after?
formatting link
Its close, I may be able to adapt. Thanks A
formatting link
When you power up Windows 95-98 in safe mode it is in VGA mode, even if you have a SVGA monitor,
by the way one or both sync pulses might be inverted between CGA & VGA.
VGA
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