Where DISPLAY_ENABLE is high during the 192 active lines.
The ZX Spectrum, released in 1982, was one of the most influential and iconic home computers of the 1980s. At the heart of this revolutionary machine was the Uncommitted Logic Array (ULA) chip, a custom-designed integrated circuit that played a pivotal role in the Spectrum's success. In this post, we'll delve into the world of microcomputer design and explore the intricacies of the ZX Spectrum ULA, examining how it was designed and what made it so remarkable. The Zx Spectrum Ula How To Design A Microcomputer Pdf 57l
Chris Smith’s The ZX Spectrum ULA: How to Design a Microcomputer is a comprehensive technical analysis detailing the reverse-engineering of the Ferranti Uncommitted Logic Array used in the 1980s computer. The 324-page book examines crucial hardware aspects, including video timing, memory contention, and design quirks based on transistor-level analysis. For more details, visit zxdesign.info . The ZX Spectrum ULA: How to design a microcomputer Where DISPLAY_ENABLE is high during the 192 active lines
Chris Smith’s work is not a simple history; it is a deep dive into digital logic and semiconductor manufacturing. The book features over , detailing the ULA down to its component transistors and resistors. Key Topics Covered: Amazon.com In this post, we'll delve into the world
"During the display period, the CPU shall be delayed by half a clock cycle for every memory access within the contended region. This ensures the ULA gets alternating access to the DRAM."
The ZX Spectrum ULA: How to Design a Microcomputer by Chris Smith is a comprehensive technical guide that details the inner workings of the Sinclair ZX Spectrum's custom Uncommitted Logic Array