Temporarily retired while US tariffs are priced for PCBs

These printed circuit boards can be used to build a range of RCBus (80 pin) retro computers.

I hold sufficient stock of most boards to cover all likely orders. Stock levels are only shown where there is very limited stock available.

Full details of each board can be found by looking at its separate kit listing, but here is a summary:

Motherboards

• SC126 - Z180 RomWBW CP/M SBC/motherboard
• SC720 - Z80 RomWBW CP/M SBC/motherboard

Backplanes

• SC701 - Backplane, 6+1 slot, 5 volt power input
• SC702 - Backplane, 6+1 slot, no power input
• SC709 - Backplane, 12+1 slot, 5 volt power input
• SC710 - Backplane, 12+1 slot, no power input
• SC723 - Backplane 3, 5 volt power input

Modules

• SC703 - Power module, 8 to 15 volt input
• SC704 - I2C bus master module
• SC705 - Serial 68B50 ACIA module
• SC706 - Z80 CPU and clock module
• SC707 - Z80 memory module, 128kB+128kB
• SC708 - Z80 single board computer module
• SC711 - Prototyping module
• SC712 - Power module, 5 volt input
• SC714 - Z80 memory module, MMU, 512kB+512kB
• SC715 - Compact Flash module
• SC716 - Z80 SIO/2 dual serial module
• SC717 - Z80 PIO parallel I/O module
• SC718 - Z80 CTC counter/timer module
• SC719 - Digital I/O module
• SC721 - Memory module, linear, 512kB+512kB
• SC722 - Z180 CPU module, 18.432MHz
• SC724 - Breakout prototyping module
• SC725 - Z80 SIO/2 + Z80 CTC module
• SC726 - Clock oscillator module
• SC727 - Real time clock module
• SC728 - Module riser
• SC729 - Compact Flash module
• SC730 - Z80 CPU plus MMU module
• SC731 - Dual PWM signal module
• SC732 - Dual servo controller module
• SC733 - Prototyping module

Other bare PCBs are also available

• Pick'n'Mix Boards for RCBus-40pin
• Pick'n'Mix Boards for RCBus/RC2014
• Pick'n'Mix Boards for I2C Bus

Documentation

Each printed circuit board has a user guide, component sourcing, and assembly instructions. This can be found in the documentation link below. PCB design files can be found at EasyEDA.com and OSHWLab.com, where you can download Gerber files.

The documentation can be found at www.smallcomputercentral.com

Related items

• Components, spares, and accessories

Compatibility

These printed circuit boards conform to the RCBus specification v1.0

The RCBus specification includes RCBus-2014 (both RC2014 standard 40-pin bus and RC2014 enhanced 60-pin bus) and also the full 80-pin RCBus. The 80-pin RCBus provides support for advanced Z80 features, such as the interrupt daisy-chain, as well as support for other processor families.

Complete Systems

If you are looking for a complete system the following products might be appropriate.

• SC126 - RCBus-80pin Z180 RomWBW CP/M Motherboard
• SC720 - RCBus-80pin Z80 RomWBW CP/M Motherboard
• SC791 - RCBus-80pin Z80 RomWBW CP/M Computer
• SC792 - RCBus-80pin Z180 RomWBW CP/M Computer
• SC131 - Pocket-sized Z180 RomWBW CP/M computer

Notes

• These products are supplied as PCBs only.
• It is your responsibility to pay any import duty or taxes charged by your home country.
• RC2014 is a trademark of RFC2795 Ltd.
• This product is designed for hobby use and is not suitable for industrial, commercial or safety-critical applications.