This is a Z80 processor card for Z50Bus. It contains a Z80 CPU, ROM, RAM, clock oscillator, and a simple serial port. Just add a backplane and a power/reset card to get started.

This card is an alternative to SC516 and has been created due to supply problems with some SC516 components.

Features

• Z80 CPU, typically running at 7.3728 MHz
• 128k bytes RAM (second 64k not easy to use, so best consider it to be 64k usable)
• 128k bytes ROM divided into four 32k banks, selected with jumpers
• Simple bit-bang serial port to get you started
• LiNC Z50Bus header plug
• LED for power and status indication
• Option to fit a second clock oscillator, selectable with jumper
• Runs the Small Computer Monitor, with ROM BASIC and the CP/M loader included

The onboard LED can flash results of the self-test, so a serial port or RAM problem will not look like a dead processor.

The Kit

The kit contains everything you need to build the card, except solder, tools, and cleaning materials. To use the completed card you require* a backplane (eg. SC501) and a power/reset card (eg. SC502), a USB to serial adapter (5-volt power and 5-volt signals), a computer, and a terminal program, such as Tera Term.

• It is possible to use this card as a single board computer (SBC) by powering it from the serial port and connecting a reset button between the bus header reset pin and ground pin.

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

Documentation

This product has a user guide and an assembly guide. The Small Computer Monitor has a user guide and a detailed tutorial. These documents can be found at www.scc.me.uk or by following the documentation link below.

Related items

• SC501 - Backplane
• SC502 - Power/reset card
• Components, spares, and accessories
• Pick'n'Mix printed circuit boards

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.
• This design is made with the permission of LiNC (designers of the Z50Bus).
• This product is designed for hobby use and is not suitable for industrial, commercial, or safety-critical applications.