The Zx Spectrum Ula- How To Design A Microcomputer -zx Design Retro Computer- Direct

At the center of the ZX Spectrum's design was the , a semi-custom logic chip that allowed Clive Sinclair to significantly reduce manufacturing costs. The ULA was responsible for several critical functions:

The is the grandfather of modern SoCs (System on Chips). The principle of "put everything but the CPU into one high-density logic block" is exactly how a Raspberry Pi or a smartphone SoC works. The only difference? 40 years of Moore's Law. At the center of the ZX Spectrum's design

Ironically, the very chip that made the Spectrum cheap also destroyed its reliability. At the center of the ZX Spectrum's design