Cassette tape port

The cassette tape port is a .156" edge connector located on the back of the VIC-20, in between the user port and the serial bus.

This port is compatible with Commodore datasette cassette tape drives made for the PET series, the VIC-20, as well as the Commodore 64. It is sometimes used to supply power to devices attached to the serial bus such as the SD2IEC.

Pinout

Pin	Connection	Use
A,1	GND
B,2	+5V
C,3	VIA #1 CA2*	Cassette motor
D,4	VIA #2 CA1	Cassette read
E,5	VIA #2 PB3	Cassette write
F,6	VIA #1 PA6	Cassette switch

* The cassette motor line doesn't attach directly to the VIA. Rather, CA2 controls a higher-voltage source via a transistor. The Revision E schematic^[A] lists this as "9V unregulated" with a 7.5v Zener Diode to ground.

Notes

• A: See www zimmers net/anonftp/pub/cbm/schematics/computers/vic20/index.html, "vic-20-right.tiff"