Cross-platform multi-console emulator supporting a number of 8-bit and 16-bit gaming consoles.

Linux, Windows, and web (WASM) are officially supported. Other platforms may work but have not been tested.

• Emulation for the following consoles:
  • Sega Genesis / Mega Drive
  • Sega CD / Mega CD
  • Sega 32X / Mega 32X
    • This core is currently not well-optimized - full-speed 32X emulation requires a CPU with decent single-core performance
  • Sega Master System / Mark III
  • Game Gear
  • Nintendo Entertainment System (NES) / Famicom
  • Super Nintendo Entertainment System (SNES) / Super Famicom
  • Game Boy / Game Boy Color
• GPU-based renderer with integer prescaling and optional linear interpolation
• Configurable pixel aspect ratio for each console with several different options: accurate to original hardware/TVs, square pixels, and stretched to fill the window
• Support for the Sega Master System FM sound unit expansion
• Support for the Sega Genesis SVP chip, used in Virtua Racing
• Support for the most common NES mappers, plus a number of less common mappers
• Support for most SNES coprocessors (e.g. Super FX, SA-1, DSP-1, CX4, S-DD1, SPC7110)
• Support for both 3-button and 6-button Genesis controllers
• Support for keyboard controls and DirectInput gamepad controls
• Save states, fast forward, and rewind
• Some simple horizontal blur and naive anti-dither shaders for blending dithered pixel patterns, which were extremely common on these consoles due to limited color palettes and lack of hardware-supported transparency
• Optional 2x CPU overclocking for Sega Master System and Game Gear emulation
• Optional 2-4x GSU overclocking for SNES Super FX games
• Can run the Titan Overdrive and Titan Overdrive 2 demos for the Mega Drive

The GitHub Actions workflow compiles release builds on every commit, which will stay available for 90 days afterwards: https://github.com/jsgroth/jgenesis/actions

Note that these builds are not always well-tested and may have bugs.

See BUILD.md

• Z80 User Manual: https://map.grauw.nl/resources/cpu/z80.pdf
• The Undocumented Z80 Documented: http://www.myquest.nl/z80undocumented/z80-documented-v0.91.pdf
• Sega Master System architecture: https://www.copetti.org/writings/consoles/master-system/
• Sega Master System / Game Gear documentation: https://www.smspower.org/Development/Documents
• YM2413 application manual: https://www.smspower.org/maxim/Documents/YM2413ApplicationManual
• Reverse engineering of the YM2413: https://github.com/andete/ym2413

• M68000 Family Programmer's Reference Manual: https://www.nxp.com/docs/en/reference-manual/M68000PRM.pdf
• Motorola 68000 Opcodes: http://goldencrystal.free.fr/M68kOpcodes.pdf
• Mega Drive / Genesis architecture: https://www.copetti.org/writings/consoles/mega-drive-genesis/
• Mega Drive official documentation: https://segaretro.org/Mega_Drive_official_documentation
• Sega Genesis hardware notes by Charles MacDonald: https://gendev.spritesmind.net/mirrors/cmd/gen-hw.txt
• Aggregating Community Research: https://gendev.spritesmind.net/forum/viewtopic.php?f=2&t=2227
• Mega Drive video timings: https://gendev.spritesmind.net/forum/viewtopic.php?f=22&t=519
• Genesis ROM header reference: https://plutiedev.com/rom-header
• Genesis - Going beyond 4MB: https://plutiedev.com/beyond-4mb
• SEGA Mega Drive / Genesis hardware notes by Kabuto: https://plutiedev.com/mirror/kabuto-hardware-notes
• Huge thread discussing and detailing the YM2612: https://gendev.spritesmind.net/forum/viewtopic.php?f=24&t=386
• Genesis EEPROM games: https://gendev.spritesmind.net/forum/viewtopic.php?f=25&t=206
• SVP documentation by notaz, as well as earlier documentation work by Tasco Deluxe: https://notaz.gp2x.de/docs/svpdoc.txt

• Mega CD official documentation: https://segaretro.org/Mega-CD_official_documentation
• ECMA-130 standard: https://www.ecma-international.org/publications-and-standards/standards/ecma-130/
• Thread discussing details of Mega CD emulation: https://gendev.spritesmind.net/forum/viewtopic.php?t=3020

• 32X official documentation: https://segaretro.org/32X_official_documentation
• SH-1/SH-2 programming manual: https://antime.kapsi.fi/sega/files/h12p0.pdf
• SH7604 hardware manual: https://segaretro.org/images/2/2c/SH7604_Hardware_Manual.pdf

• 6502 Instruction Set: https://www.masswerk.at/6502/6502_instruction_set.html
• 6502 Hardware Manual: https://web.archive.org/web/20120227142944if_/http://archive.6502.org:80/datasheets/synertek_hardware_manual.pdf
• Documentation for the NMOS 65xx/85xx Instruction Set: https://www.nesdev.org/6502_cpu.txt
• Nintendo Entertainment System (NES) architecture: https://www.copetti.org/writings/consoles/nes/
• NESDev NES reference guide: https://www.nesdev.org/wiki/NES_reference_guide

• A 65816 Primer: https://softpixel.com/~cwright/sianse/docs/65816NFO.HTM
• Super Nintendo architecture: https://www.copetti.org/writings/consoles/super-nintendo/
• fullsnes - nocash SNES hardware specifications: https://problemkaputt.de/fullsnes.htm
• Anomie's SNES documents: https://www.romhacking.net/?page=documents&category=&platform=&game=&author=&perpage=20&level=&title=anomie&docsearch=Go
• SFC Development Wiki: https://wiki.superfamicom.org/

• Game Boy CPU (SM83) Instruction Set: https://gbdev.io/gb-opcodes/optables/
• Pan Docs: https://gbdev.io/pandocs/
• Game Boy Complete Technical Reference: https://gekkio.fi/files/gb-docs/gbctr.pdf
• Gameboy Sound Hardware: https://gbdev.gg8.se/wiki/articles/Gameboy_sound_hardware
• The Cycle-Accurate Game Boy Docs: https://github.com/geaz/emu-gameboy/blob/master/docs/The%20Cycle-Accurate%20Game%20Boy%20Docs.pdf
  • This contains some outdated/incorrect information but is still useful