BBC Microcomputer System User Guide

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BBC Microcomputer System user Guide Original edition written by John Coll, edited by David Allen. Amendments and corrections to this edition by Acorn Computers Limited Part no 0433 000. Issue 1. Date October 1984. WARNING: THE COMPUTER MUST BE EARTHED. Important: The wires in the mains lead to the computer are coloured in accordance with the following code: Green and yellow Earth Blue Neutral Brown Live As the colours of the wires may not correspond with the coloured markings identifying the terminals in your plug, proceed as follows: The wire which is coloured green and yellow must be connected to the terminal in the plug which is marked by the letter E, or by the safety earth symbol or coloured green, or green and yellow. The wire which is coloured blue must be connected to the terminal which is marked with the letter N, or coloured black.

Text conventions used in this manual 1 What this user guide can and can’t do 2 1 Getting started 3 Experimenting 5 Connecting up the cassette recorder 7 Leads 7 Volume 8 Running the WELCOME programs 8 The keyboard 11 Cursor control keys 13 Giving the computer instructions – Part 1 2 Commands 15 3 An introduction to variables 18 4 A simple ...

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