This is a quick and dirty test jig for a CDP1854 UART. It uses an Arduino Nano to set up and control the UART. A MAX232 style chip is used to provide a RS232 level signals for a serial connection.

The Nano configures the UART for 9600 baud, 8 data bits, 1 stop bit and no parity. On reset, it sends out an introductory blurb to let you know that at least the transmit portion of the UART is working. You can then type characters on the terminal/computer you've got hooked up to the serial connection to see that the receive portion of the UART is also working.

On an ANSI type terminal, pressing the Insert key will produce a canned blurb.

It's nothing fancy, but if you've got some CDP1854s sitting around and a burning desire to see if they work, this program and schematic will get you started.