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CoCo-3 RGB to CGA/EGA Adapter

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Looking for CoCo help? If you are trying to do something with your old Color Computer, read this quick reference. Want to contribute to this wiki? Be sure to read this first. This CoCo wiki project was started on October 29, 2004. --OS-9 Al

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Home / Hardware - CoCo-3 RGB to CGA/EGA Adapter


How to make a CoCo3 to CGA/EGA adapter

List of materials:
1) an old PC serial cable (the one that goes from
the motherboard to the back of the case DB9M)
2) a DB9F socket to replace the DB9M (I used an
EGA card since my CoCo is repacked)

Instructions:
Cut the DB9M connector off of the serial cable and
solder the wires to the DB9F using the following
pinout. Note that both pins 1 and 2 of the CoCo
end go to pin 1 of the DB9F. CoCo Pin 7 should only
be connected to a monitors audio input (if present)
or you may run it to an external amplifier.

__________
|[][][][][]| <--Looking at the bottom of the CoCo3
|[][] [][]|
TTTTTTTTTT
|||||||||<--red wire=pin 1 (both ends)
|||||||||
x|7|x|4|1
.6 x 5 3 1 <--connect toDB9 pin# (x=no connection)
___________
( 5 4 3 2 1 )
\ 6 7 8 9 / <--DB9F (facing the socket side)
���������