RGB-VGA Converter -- buy or build?
trixter at oldskool.org
Sun Mar 14 14:37:26 CDT 2010
As previously discussed in this list, and documented on
http://www.oldskool.org/pc/cgacal , CGA monitors have circuitry to
change color index #6 to a different color. CGA also has a fourth
"intensity" pin. Does anyone know if some sort of specially-wired cable
might be able to convert 4-pin RGBI to something these kinds of
converters can take as input and everything will still look decently?
I ask because I have a need to do video capture of native CGA output.
Don't ask :-)
The best solution I've come up with is to use an older VGA card (1990 or
before) that comes with utilities to force it into CGA emulation --
forces 400 scandoubled lines, forces the 8x8 font, and ports react
properly to MC6845 writes. This is 95% of the way there, but it's still
a 70Hz refresh rate, not 60. All ideas welcome.
On 3/9/2010 11:50 AM, Dan Roganti wrote:
> Jovica Stojoski wrote:
>> I need scematics of RGB to VGA converter.
> we use one of these, it's almost universal , RGB/CGA/EGA/YUV to VGA
> more details on the website
> only $50
Jim Leonard (trixter at oldskool.org) http://www.oldskool.org/
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