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#63b Z80 CPU, serial and clock
August 28th, 2019
The 63 module has been updated. Now with two oscillators, individual adjust speed for CPU and 68B50. The I/O address of 68B50 can be selected, and now working with ROMWBW. Also fixed the blinking LEDs for TX and RX.

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#67a Z80 KIO Module
August 27th, 2019
This is the first release, and it is experimental module for the exploration of the KIO chip.

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#70a Z180 Micro Module
September 3rd, 2019
This module is a self contained board (SBC) with everything onboard to run full CP/M 2 (using ROMWBW). It contains a Z180 CPU clocked at 18,432Mhz, with 2 serial ports, DMA and CTC. The module contains also 512k RAM and 512k ROM which is fully accessible.

I sell on Tindie

Kits on offer:
#61 The Missing Module (for RC2014)

Storage Module using Compact Flash (for RC2014)

Repair kit for RC2014

Full Z180 kit ("Black Adder")

#33 Serial Module Kit (for RC2014)

PCBs for Simple Modular 8-bit computer

#42 Memory Module 64K (repair or upgrade kit)

For a peek on ongoing projects.


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RC2014 is a trademark of RFC2795 Ltd ( My modules do not adhere strictly to the "designed for RC2014"labeling scheme, though they are interoperable.
Small Computer Workshop (SCW) and Small Computer Monitor (SCMon) are copyright Steve Cousins (
ROMWBW is copyright Wayne Warthen (