**BASIC ROM USER GUIDE** for the BBC Microcomputer and Acorn Electron This book contains a detailed description of the BASIC system used on the BBC Microcomputer and Acorn Electron. It covers the operation of BBC BASIC I, BBC BASIC II and Electron BASIC, and enables the serious programmer to considerably enhance the facilities of his machine. A number of useful examples are provided including a complete disassembler, and various facilities such as listing active variables and overlaying procedures are described. Extensive reference sections cover the ROM routines and error recovery, including changing MODE inside procedures and salvaging bad programs.