On 12 Aug 99 at 22:46, Automatic digest processor wrote:
>>Another question, while I'm thinking about it. Back When, you used to
>>be able to get an adaptor to allow plugging a VGA monitor into a CGA
>>controller. Both the Zenith and the Tandy are CGA machines. Can anyone
>>suggest an Old Junk website where I can order one? Anybody got the
>>plans for one? I know 9 pin male on one end, 15 pin female on the
>>other, but from there I'm stuck. Wonder if I want to risk tinkering
>>based on pinout diagrams? I think I have some here somewhere....
I am not sure that that is possible, given that CGA/RGB are digital (TTL) and
VGA is analog. I would love to be shown wrong, however. I have a file that
details how to build a simple converter that will take the CGA signal and
convert it to an NTSC composite video signal that will drive an amber/green
mono composite monitor. Some CGA/RGB video systems/cards have an output pin
on the connector that has an NTSC composite video signal available. My
Commodore 128 has this video signal and I used it with an old amber and green
screen monitor and it was quite acceptable for 80 column text work.
Regards,
Dale Mentzer
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