"This Eurocard (100 x 160mm) is a plug-in replacement for
the 6502 CPU card to upgrade systems to use the advanced facilities of
Motorola's 6809 8-bit processor.
This microprocessor is generally considered to be the
programmer's processor and is ideally suited to run high level languages such as
Pascal. The Acorn 6809 is provided with an operating system in 2K which handles
the Acorn VDU, ASCII encoded keyboard and printer; it is readily expanded and
very user friendly.
The hardware provides for direct plug-in connection to
Anadex type printers and encoded keyboards and all 6809 signals are taken off
the board via the Acorn bus 64 way edge connector. The address and data lines
are buffered and 1K of user RAM is provided.
Hardware DIN standard indirect edge connector 20-way and
26-way I DC connectors for keyboard and printer MC 6809 microprocessor 2K ROM
(Initially 2716) 4K and 8K compatible 1K RAM (2 x 2114) BIPOLAR PROM for address
decoding 6522 - two 10-bit parallel 1/0 port for keyboard and printer Random
logic devices Bus buffers The Acorn 6809 is provided with a User's Manual which
describes how to use the Monitor's commands, and includes programming examples.
200.012 Issue unknown [3 System 3]
