CoCo Serial Printer

Available on the Tandy Color Computer, also known as CoCo.

4 PIN DIN 270 FEMALE (At the computer)

4 PIN DIN 270 FEMALE at the computer.

Pin Name Description
1 CD Carrier Detect (terminal software)
2 /BUSY (used by Basic PRINT command) or Rx Data (Terminal software)
3 GND  
4 Tx Data for PRINT command and Terminal software.

Source: [The Hardware Book]