The Commodore plus/4 is a home computer from the 1980s and typical with other computers of that era comes with a built-in keyboard and was designed to connect to a television set.

The +4 has a number of built in I/O interfaces. These include a serial UART, 8-bit parallel port, cassette port and a CBM IEC serial bus.

The video output can drive composite video inputs on TVs or, for example, a Hauppauge HVR900H capture board in Linux (see photo). This setup has low latency and is very usable in Linux, but this may not be the case elsewhere.

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GND 5V  RES P2  P3  P4  P5  RxC ATN  9V  9V GND

GND P0  RxD RTS DTR P7  DCD P6  P1  DSR TxD GND
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