This site is dedicated to sales of an educational 8-bit computer kit which uses the Z80 for its central processing unit (CPU). This microcomputer kit is based on the wire-wrap hobbyist system I describe in my main web site, which in turn is based on designs made popular by Steve Ciarcia in his book Build Your Own Z80 Computer, Byte Books, 1981. I created this kit in response to requests by site visitors for an easier way to build a Z80-based computer. The best way to get familiar with the kit for sale here is to download and read the kit instructions. If you still have questions, please email me.  --Best wishes, Donn Stewart.

Serial Interface kit.

Price: $25.00

This is a serial interface kit that allows the Z80 computer to communicate with a PC running terminal emulation software or with a dumb terminal if you have one. The interface runs at 9600 baud. To be useful, you should have a version 7 or higher EPROM to take full advantage of the new code that is there, including a monitor program. However, you can use the serial interface with EPROMs version 6 and lower, by entering a 30-byte boot loader program through the port switches.

The best way to understand what the serial interface will do is to read the serial interface kit instructions and look at the serial interface demonstration videos.

An optional EPROM with Palo Alto Tiny BASIC is available for use with the computer with the serial interface attached. The Tiny BASIC manual is here.

Note there was a typo on page 13 of the serial interface instructions downloaded prior to June 29, 2015. ROM entry should be 0x04C0, and NOT 0x0C0.