This module houses a Z80 serial I/O (SIO/0) device (Z84C4008PEG or Z84C4010PEG) and is designed for use with the RC2014 retro computer.

The Z80 SIO/0 provides two serial ports. Each port has the following clock source options:

• Bus clock CLK
• Bus clock CLK2
• On-board oscillator

The module provides support for Z80 mode 2 interrupts, with the IEI and IEO signals available on a two pin header for linking with flying cables. These signals can also be optionally connected to the RC2014 bus with jumpers.

Address selection is by jumper, allowing two of these modules to be included in a system.

Features

• Compatible with existing SIO firmware
• Tight address decoding
• Flexible input clock selection with jumpers
• Easy access to input and output signals on header pins
• Interrupt daisy chain signals can be jumpered to bus or use flying leads
• On-board clock source (option, not included in kit)

The Kit

The kit contains everything you need to build the module, except solder, tools and cleaning materials. The Z80 SIO/0 supplied is rated at either 8MHz or 10MHz. To use the completed module you require a suitable Z80 CPU and memory module, a suitable backplane, a USB to serial adapter (5-volt power and 5-volt signals), a computer, and a terminal program (such as Tera Term).

If you have any doubts about sourcing a suitable USB to serial adapter, you might like to include this option with your kit.

Documentation

The documentation can be found at www.scc.me.uk or by following the link below.

Related items

• SC132 - Printed circuit board on its own
• SC112 - Modular backplane
• Components, spares, and accessories

Notes

• This product is supplied as a kit of parts that require assembly.
• It is your responsibility to pay any import duty or taxes charged by your home country.
• My products are made in accordance with the "designed for RC2014" labelling scheme.
• 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.