The RCBus is an extended version of the RC2014^TM bus, designed to overcome the limitations of the RC2014^TM bus. The bus extensions and formal specification have been developed by members of the retro-computing community via the retro-comp forum.

The RCBus specification v1.0 is available below.

RCBus forum: retro-comp google group.

The RCBus exists for these reasons:

• To overcome the limitations of the RC2014^TM bus whilst maintaining compatibility with existing products. The additions include support for advanced features, such as the Z80 interrupt priority chain, and support for other processor families.
• To help clarify what is a genuine RC2014^TM product and what is a product with a degree of compatibility to an RC2014^TM
• To reduce the chance of trademark infringement (RC2014 is a trademark belonging to RFC2795 Ltd)

The RC2014^TM bus specification is a subset of the full RCBus specification. This subset is defined by the RCBus-2014 specification. Similarly, the Z80 family extensions are defined by the RCBus-Z80 specification. Other processors and applications have their own extensions within the RCBus specification. Compatibility can be defined by which specifications are supported.

Modules designed for the 40-pin RCBus (or RC2014 standard bus) can be used with 80-pin RCBus backplanes, but not all 80-pin RCBus modules can be used with 40-pin RCbus/RC2014 backplanes.

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Notes relating to RCBus specification:

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RCBus Product Ranges

• RCBus product summary
• SC700 series, 80-pin RCBus (extended RC2014 bus)
• SC600 series, 40-pin RCBus (RC2014 compatible)
• SC100 series, 40-pin+ RC2014 styling

RCBus Information

• I/O port addresses
• Photo gallery

RC2014 Information

• RC2014 Bus
• Circuit board dimensions, standard
• Modules list – updated 2019-04-09 (XLS)