The SC700 is a modular 8-bit computer built around the RCBus. The system conforms to the RCBus specification.

THIS PAGE IS INCOMPLETE

• SC700 Series – Jumper Settings TODO
• SC700 Series – Designing Your RCBus Computer
• SC700 Series – Hardware Compatibility TODO

The design is open source with full details of the schematics, printed circuit board Gerber files, and software, either on this website or linked from this site. Kits are available for those who would like the convenience and reassurance that kits offer.

Software and firmware support includes RomWBW and CP/M.

The following modules are available.

• SC701 – Backplane, 6+1 slot, 5-volt input
• SC702 – Backplane, 6+1
• SC703 – Power supply and resent module. 8 to 15-volt input
• SC704 – I2C bus master module
• SC705 – Serial ACIA module
• SC706 – Z80 CPU module
• SC707 – Z80 memory module, 128k ROM + 128k RAM
• SC708 – Z80 single board computer module
• SC709 – Backplane, 12+1, 5-volt input
• SC710 – Backplane, 12+1
• SC711 – Prototyping module
• SC712 – Power supply and reset module, 5-volt input
• SC713 – RCBus tool (pin-puller / ruler)
• SC714 – Memory module, 512k ROM + 512k RAM
• SC715 – Compact Flash module
• SC716 – Z80 SIO/2 serial module
• SC717 – Z80 PIO digital module
• SC718 – Z80 CTC timer module
• SC719 – Digital I/O module
• SC720 – Z80 single board computer (SBC)
• SC791 – Z80 RomWBW modular computer

The RCBus is an extended version of the RC2014^TM bus. The illustration below attempts to show how the different retro-computer designs on this website relate to each other.

I/O Device Addresses

The limited I/O address space is currently assigned as follows:

I/O Address	Use
0x00 to 0x03	Digital I/O
0x08 to 0x0B	Status LED (active low)
0x0C	I2C bus master
0x10 to 0x17	Compact Flash #1
0x18 to 0x1B	Reserved
0x20 to 0x23	Bit-bang serial RTS, or ROM bank select A15
0x28 to 0x2B	Bit-bang serial TXD, or ROM bank select A16
0x30 to 0x33	RAM bank select A16
0x38 to 0x3B	RAM/ROM select (128k Z80 systems)
0x38 to 0x3F	Diagnostic LED port (512k Z80 systems)
0x40 to 0x41	Serial ACIA #2
0x80 to 0x81	Serial ACIA #1
0x80 to 0x83	Z80 SIO #1
0x84 to 0x87	Z80 SIO #2
0x88 to 0x8B	Z80 CTC #1
0x8C to 0x8F	Z80 CTC #2
0xC0 to 0xFF	Z180 CPU internal registers

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Notes

• This product is designed for hobby use and is not suitable for industrial, commercial, or safety-critical applications.
• The product contains small parts and is not suitable for young children.