• Title: Assembly Language Programming for the Amstrad CPC 464, 664 & 6128

• Authors: A.P. & D.J. Stephenson

• Publisher: Argus Books

• Publication Year: 1986

• ISBN: 0-85242-861-8

• Length: 246 pages

Very Rare, great condition

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the book is a practical instructional guide for learning machine code and Z80 assembly language programming tailored specifically to the Amstrad CPC series of 8-bit home computers.

Key Topics & Content Covered

• Z80 Assembly & Machine Code: It introduces readers who already understand BASIC to low-level assembly language, focusing on the Z80 instruction set. This allows programmers to bypass the speed and memory limits of standard BASIC.

• Core Concepts: It covers essential low-level hardware structures, binary and hexadecimal systems, registers, and memory management.

• Practical Mathematics & Execution: The text details math logic (addition, subtraction, multiplication, division), decision-making branches, loops, parameter passing, and managing computer input/output.

• Built-in Tools: It explains how to interact with the Amstrad's resident operating system firmware.

• No Assembler Required: For readers who didn't own a formal assembler tool at the time, the book famously provides an integrated BASIC loader program. This program allows users to type hex bytes directly into BASIC to run machine code subroutines.