The aim of this design is to provide a low-cost CP/M system. It uses the Z180 CPU for good performance and RomWBW firmware for robust implementation of CP/M with support for a wide range of hardware.

As a single board computer, it is able to run a wide range of CP/M software without any expansion cards fitted.

If you are looking for something a little simpler, you might like to consider SC114. For something a little more advanced, SC126 might be worth a look.

The kit comprises parts to build a Single Board Computer with these main features:

• Z180 CPU running at 18.432 MHz
• 512k byte RAM
• 512k byte Flash containing RomWBW
• Two asynchronous serial ports
• SPI port primarily for SD card
• Voltage supervisor
• Two expansion sockets
• Micro SD card adapter
• USB adapter and cable

RomWBW is a robust ROM-based operating system for retro computers. It includes CP/M 2.2 and Z-System and supports a wide range of hardware, including SD cards and Compact Flash cards for storage. RomWBW has been provided free of charge by its author Wayne Warthen. Thank you, Wayne, for providing this and all the support.

Expansion is available using the two 40-pin sockets. One is mounted horizontally to allow an extension backplane to be fitted, such as SC113.

The kit includes a micro SD card adapter to connect to the SPI port. RomWBW supports SD cards for CP/M and Z-System file storage.

The kit also includes an FTDI style serial adapter and USB lead to connect one of the motherboard's serial ports to a computer running a terminal emulation program.

The kit contains everything you need to build the computer, except a micro SD card, solder, tools and cleaning materials.

Documentation

The documentation can be found at www.scc.me.uk

Purchasing the PCB only

The bare PCB is available here on Tindie.

Dimensions

The assembled kit is approximately 10cm (4") x 10cm (4") x 6cm (2.5"). It is supplied in a box approximately 12cm (5") x 16cm (6.5") x 2.5cm (1") weighing about 150g (0.35lbs).

Notes

• This product is supplied as a kit of parts which require assembly.
• It is your responsibility to pay any import duty or taxes charged by your home country.
• This product is designed for hobby use and is not suitable for industrial, commercial or safety-critical applications.
• RomWBW has been provided free of charge by its author Wayne Warthen.