"The ZX Spectrum ULA: How to Design a Microcomputer" by Christopher David Smith provides a detailed technical analysis and reverse-engineering of the Ferranti Uncommitted Logic Array (ULA) used in the Sinclair ZX Spectrum. The book serves as a foundational guide for retro-computing, covering video generation, memory contention, and enabling the replication of the ULA using modern FPGAs. For more details, visit zxdesign.info .
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Later chapters transition into digital electronics, making them more accessible to programmers and hobbyists. Illustrations: "The ZX Spectrum ULA: How to Design a