The Zx Spectrum — Ula- How To Design A Microcomputer -zx Design Retro Computer- ~repack~

Title: The Ghost in the Gate Array

The ULA allowed Clive Sinclair to deliver a color computer to the masses at an unprecedented price point. It turned the ZX Spectrum from a theoretical design into a household object. Today, modern recreations of the Spectrum often use modern FPGAs to emulate the behavior of that original Ferranti ULA, proving that the logic design conceived in the early 80s is still sound, efficient, and worthy of study. Title: The Ghost in the Gate Array The

4. How to Design Your Own ULA-style Computer

If you want to replicate the magic on an FPGA or CPLD today, here is the functional spec: Introduction: The Tyranny of the Bill of Materials

Memory Management: Details how the ULA handles the shared 16KB bank of RAM where both the CPU and the display circuitry compete for access. retailing at £49.95.

1. Introduction: The Tyranny of the Bill of Materials

In 1981, a viable home computer required approximately 70-100 discrete logic chips (TTL). The Apple II used 62; the Commodore PET used over 90. Sinclair’s previous machine, the ZX81, used a single ULA to replace roughly 80% of those chips, retailing at £49.95.