This book teaches the beginner by example in a simple, easy-to-learn form and it is an invaluable reference work for the expert too!
Section A:
Three chapters explaining what you need to know about ZX80 Machine Code on the Spectrum - how memory is organised, the registers, the stack, the display.
Section B:
40 Routines including, Scroll-up, down, side to side by pixel or by character.
Search and Replace, token swap, string search. Rotate character, invert character - horizontally and vertically. Line Renumber - including GOSUBs, and GOTOs, RUN etc. plus many more.
