esp32-z80emu

Spectrum ZX 128K emulator on VGA-32 board

Hardware

VGA32 v1.4 Board

What it can do

• Emulate Spectrum ZX 128K
• Load snapshot in .Z80 format from SD card
• Save snapshot in .Z80 format to SD card
• Output some sounds (partial support for AY3-8912)
• Kempston mouse
• Load ROMs from SD card (/roms/128-0.rom; /roms/128-1.rom. Fall back to OpenSE Basic if not present)
• Not using any PSRAM

<img src="https://i.ytimg.com/vi/OEjMUaaSh-4/hqdefault.jpg" alt="ZX Spectrum Emulator on ESP32" width="480" height="360" border="10" />

Third party software

This project uses the following libraries:

• (GPL v3.0) Display video using VGA, process PS/2 keyboard, and sound output: https://github.com/fdivitto/FabGL
• (GPL v2.0) OpenSE Basic: https://spectrumcomputing.co.uk/index.php?cat=96&id=27510

Choose one of the following for Z80 CPU emulator:

• (unsure, MIT?) Lin Ke-Fong's https://github.com/anotherlin/z80emu
• (GPL v3.0) José Luis Sánchez's https://github.com/jsanchezv/z80cpp
• (MIT) Steve Checkoway's https://github.com/stevecheckoway/libzel
• (zlib License) Andre Weissflog's https://github.com/floooh/chips (this one seems too slow)

Plans for the future / issues

• Flickering in some games
• Beeper
• Support noise and envelope for AY3-8912 sound
• The speed is 12% faster than it is supposed to be