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Saturday, 19 August 2017
Z80 CPU, Clock and Reset module for RC2014
This is the first of several modules I will be producing for the RC2014 modular computer system.
The reset circuit is based on that used in many 1980s computers, and uses a 555 timer to generate a clean reset pulse at power on and when the onboard reset button is pressed. The reset line is driven via a transistor so that it can be pulled low by other devices on the RC2014 bus is required.
The clock is a standard 74HCT04 clock circuit, with separately buffered outputs for the Z80 CPU and the rest of the bus.
The board is the same size and shape as other new RC2014 modules, so sits nicely in an ever expanding system.
The Z80 CPU, Clock and Reset module is available as a bare PCB, a kit and as assembled and tested units.
All available from my Tindie store.