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nukeykt / Nuked-MD-FPGA

Mega Drive/Genesis core written in Verilog
GNU General Public License v2.0
291 stars 7 forks source link
68000 emulation fpga genesis mega-drive megadrive reverse-engineering sega-genesis sega-megadrive verilog yamaha ym2612 ym3438 ym6045 ym6046 ym7101 z80

readme

Nuked-MD-FPGA

nukedmd_logo

by @nukeykt, @ogamespec and @andkorzh, special thanks to @HardWrMan

Cycle accurate Mega Drive emulator. Verilog version of Nuked MD. The goal of this project is to emulate Sega Mega Drive chipset accurately as possible using decapped chips photos.

Mega Drive chipset

Sega Mega Drive chipset consist of 6 integrated circuits + RAM chips:

There are number of variations of chipsets across mega drive revisions. For example early revisions use NMOS 68k and Z80 chips, while later models switched to CMOS versions. Yamaha later integrated their chips into one big chip named FC1004.

Nuked-MD-FPGA currently targets NMOS 68k, NMOS Z80 and FC1004. No real mega drive used such combination, but Model 1 VA7 would be closest (CMOS 68k, NMOS Z80 and FC1004). Other variants possibly will be emulated in the future.

image

Progress

image

See Progress.md

Audio samples

https://drive.google.com/drive/folders/1RtqB4Rn1jMeVNzONG2wVgWdD4ZHzARxy?usp=sharing

References

Credits