==== Commodore plus/4 ====
<wrap right>
{{:boards:plus4.jpg?200}}
</wrap>

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 (2040:6600) capture board in Linux (see photo). This set up has low latency and is very usable in Linux, but this may not be the case elsewhere.
=== Pinout ===

== User port ==
<code>
 1   2   3   4   5   6   7   8   9   10  11  12
GND 5V  RES *P2 P3  P4  P5  RxC ATN  9V  9V GND

GND P0  RxD RTS DTR P7  DCD P6  P1  DSR TxD GND
 A   B   C   D   E   F   H   J   K   L   M   N

*CST SENSE
</code>

=== Memory map ===

^Address ^Device ^Function |
|$FD10   |MOS 6529B  | User port P0..P7 |

=== Resources ===

[[https://wiki.kewl.org/downloads/TED_7360R0_Preliminary_Data_Sheet.pdf|TED data sheet]]

[[https://wiki.kewl.org/downloads/TED_System_Hardware_Manual.pdf|Hardware manual]]