Programming in Z80 Assembly Language
Assembly Language Assembled for the Sinclair ZX81
An Introduction to Low Level Programming for Microprocessors
CP/M 80 Programmer's Guide
Microprocessor and Microcomputer Technology
Understanding Microprocessors
Advanced Programming for the 16K ZX81
Microprocessors and Microcomputers Their Use and Programming
Fortran for Students
Codes for computers and microprocessors
