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.

Computer kit.

This is the main computer kit. It has the Z80 processor, 2K ROM, 2K RAM, and two input ports, and two output ports. More ...

Price: $42.00

Bus display kit.

This is the kit for the computer bus display. It allows you to watch the activity on the computer system buses while the computer runs on the slow clock speed. More ...

Price: $24.00

Serial Interface kit.

This is a serial interface that allows the Z80 computer to communicate with a PC running a terminal emulation program and use its keyboard and display. More ...

Price: $25.00

Disk and Memory Expansion kit

This kit adds memory up to the full 64K that the Z80 can address, and provides an IDE disk interface, so that the CP/M operating system can be installed. More ...

Price: $36.00

Logic probe kit.

This is a simple test instrument that allows you to see the logical state of any pin in the computer while it is running. More ...

Price: $8.50

Power supply.

This is a "wall wart" style power supply that provides the 2000 mA, +5VDC regulated voltage to run the computer and display.  More ...

Price: $14.50

Power connector.

This is a plug with wire leads that fits the power input socket supplied with the computer kit. It is for hobbyists who already have a power supply.  More ...

Price: $1.70

Plain computer circuit board.

For hobbyists who already have a supply of kit components, and only want the bare printed circuit board.  More ...

Price: $17.35

Plain display circuit board.

For hobbyists who already have a supply of kit components, and only want the bare printed circuit board for the bus display.  More ...

Price: $16.50

Pre-programmed EPROMS.

For hobbyists who want to build the computer from a bare-board, or by wire-wrap, you can purchase an EPROM with code to test the computer, load programs, and run the serial interface. An optional Tiny BASIC EPROM is also available.  More ...

Price: $4.50