What can I say about this card other than it is a classic! This card provides two 8 bit parallel ports and a serial port. It was an experimenters delight. The card has TTL level, RS-232C, current loop, and current source interfaces. It was one of the few cards back then that had a UART that supported 1.5 stop bits - perfect for use with the old baudot teletypes. Yes, my very first printer was a 28KSR teletype. This was the Swiss Army Knife of I/O cards!

I built this card as a kit and over the years made all kinds of modifications to it - but it still works! All of the original documentation comes with this card.

If you'd like to see the original Processor Technology sales sheet for the 3P+S, click on these links:

• Picture of the 3P+S Caution this image is 85KB in size!
• Specifications Caution this image is 148KB in size!