Dragon/CoCo Interface Ports

These are the pinouts for all the interface ports on Dragon/CoCo(1 & 2).
 

Cassette Port


 

Joystick Port



 

Cartridge Port

 

I seem to recall there was some doubt about the presence of the 12V power rails on some/all of the CoCo variants. Somebody might like to put me right on this one.

Centronics Printer Port (Dragon)



 

Serial/Printer Port (CoCo) 'bit banger'



 

Serial/Printer Port (Dragon)



 

Composite (Video) Port (Dragon)

 

Power Supply Port (Dragon)