An expandable Z180 motherboard supplied with RomWBW (including CP/M)
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The motherboard 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 512k byte Flash containi…
Read More…The motherboard kit comprises parts to build a Single Board Computer with these main features:
Optional items:
Additional accessories, such as serial adapters and cables, can be found here. Only one Micro SD adapter can be used as their design, unfortunately, limits them to not sharing an SPI bus.
If you are looking for something a little simpler, you might like to consider SC114 or SC130.
RomWBW is a 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.
The Small Computer Monitor (SCM) is my own classic machine code monitor. This is provided in the second Flash ROM. Both Flash ROMs can be installed at the same time, but only one can be selected at a time. Selection is with a jumper or external switch.
Expansion is available using the three 80-pin sockets. One is mounted horizontally to allow an extension backplane to be fitted, such as SC113.
The optional micro SD card adapter can be connected to one of the SPI ports. RomWBW supports SD cards for CP/M and Z-System file storage. This adapter is not a well behaved SPI device and prevents the use of the second SPI port.
The optional FTDI style serial adapter allows the connection of one of the motherboard's serial ports to a computer running a terminal emulation program. A USB type A to mini-B cable is required between the serial adapter and the USB port of a computer. The motherboard has two serial ports that can be used at the same time, so you may want 2 serial adapters and USB cables.
Both the serial adapter and the micro SD card adapter can be connected directly to the motherboard or can be used remotely using the optional 6-way adapter cable.
The 80-pin expansion slots are RC2014 compatible but extended to 80 pins.
The kit contains everything you need to build the motherboard, except a CR2032 battery, a micro SD card, solder, tools, and cleaning materials.
Whilst the circuit board has a minimum of 2.54mm (0.1") component lead spacing, making soldering relatively easy, it is probably best not to think of this as a beginner's kit. It does, however, have a self-test diagnostic LED port, which can be very useful.
The documentation can be found at www.scc.me.uk
The assembled kit is approximately 10cm (4") x 17cm (7") x 6cm (2.5"). It is supplied in a box approximately 23cm (9") x 16cm (6.5") x 2.5cm (1") weighing about 300g (0.7lbs).
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