An essential supplement to the original "User Guide" provided with the BBC Micro.
An advanced programming information covered includes:
The BASIC Assembler
Full 6502 machine code reference section
Complete description of all *FX/OSBYTE calls
How to implement paged ROM software
Events & interupts
Operating system workspace
Video circuitry & coulr graphics modes
Full descriptions of the video and serail ULAs
Interfacing details, user port, 1 MHz bus, analogue port and the Tube
Full description of all internal hardware
A full circuit diagram
An invaluable reference manual for any serious programmer of the BBC - in reasonable, fully usable condition.