The Zx Spectrum Ula How To Design A Microcomputer Zx Design Retro Computer Portable !!top!! Site

Use a fast MCU (like the Raspberry Pi Pico) to bit-bang the video signal and handle I/O. 3. The Visuals (The "Attribute" System)

So, how does this history lesson help you build a "portable retro computer"? Use a fast MCU (like the Raspberry Pi