A microcomputer system designed for psychological and behavioural experiments.

This paper describes a relatively cheap MC6809-based microcomputer designed to run experiments in real-time, and to use the hardware and software facilities of a larger (HOST) computer. Each microcomputer is capable of controlling a wide range of psychological and behavioural experiments, and includes 32K RAM, 4K EPROM, 32 digital input lines, 32 digital output lines, analogue/digital converters, and programmable timers. Any programming language may be used, providing a cross-compiler generating MC6809 executable code exists for the HOST. Following over a year of use we can confirm that this system provides an effective method of running psychological and behavioural experiments.