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CoCo-3 RGB to CGA/EGA Adapter

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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)
���������