Jgenesis 0.10.0

[Felipe]

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.

Features​

• 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

GitHub - jsgroth/jgenesis: Sega Genesis / Sega CD / SNES / Master System / Game Gear emulator

Sega Genesis / Sega CD / SNES / Master System / Game Gear emulator - jsgroth/jgenesis

github.com

 

[secreto7]

It's somewhat like a successor for Kega Fusion and with the other consoles emulation reminds me of Mesen.

It should be higher on the list on the Emulation Wiki.

Also Clowmdemu 1.4 was released too.

 

[Ikagura Ikagura]

It's somewhat like a successor for Kega Fusion

I like Kega but a proper modern version is nice to see.

 

[secreto7]

Today was released 0.10.1 with a quick fix for Super Metroid.

 

[aquova]

Huh, hadn't heard of this one before. It looks pretty new, so it's impressive they have so many systems (odd name though)

 

[secreto7]

Huh, hadn't heard of this one before. It looks pretty new, so it's impressive they have so many systems (odd name though)

It was initially an standalone Sega Genesis emulator and J & G are initials of the author.

It's very good and a modern alternative to Kega Fusion, also it works better than Ares for me.

 

[aquova]

What makes it a successor to Kega Fusion?

 

[secreto7]

What makes it a successor to Kega Fusion?

I meant because it has an easy to use GUI, is modern, emulates Sega Master System, Mega Drive/Genesis, Sega CD, 32x, Game Gear.

If someone doesn't want to use genesis plus gx (because of the GUI problem) or its ports, Blastem, or if Ares doesn't do it. And some people say they have trouble with Kega Fusion on modern Windows (I didn't).

It's good to have alternatives.

 

[Deleted member 132407]

I meant because it has an easy to use GUI, is modern, emulates Sega Master System, Mega Drive/Genesis, Sega CD, 32x, Game Gear.

If someone doesn't want to use genesis plus gx (because of the GUI problem) or its ports, Blastem, or if Ares doesn't do it. And some people say they have trouble with Kega Fusion on modern Windows (I didn't).

It's good to have alternatives.

I use it for 32X, CD, Genesis. CD emulation is better than Kega Fusion.

Post automatically merged: Jun 18, 2025

Update @ v0.10.1

Release v0.10.1 · jsgroth/jgenesis

Bugfix release Only one functional change in this release, which fixes a regression introduced in v0.10.0: (SNES) Corrected implementation of how Mode 7 clips scrolled center point coordinates; th...

github.com

 

[Nelson2001 Nelson2001]

Truth be told, this Multi-Emulator is an alternative to Mesen, but the Multi-Emulator (jgenesis) is still in development.

 

[secreto7]

Truth be told, this Multi-Emulator is an alternative to Mesen, but the Multi-Emulator (jgenesis) is still in development.

Yes but it has good accuracy and compatibility and enough features.
At least for Sega Genesis.

 

[Deleted member 132407]

Big changes for upcoming update

Workflow runs · jsgroth/jgenesis

Sega Genesis / Sega CD / SNES / Master System / Game Gear emulator - Workflow runs · jsgroth/jgenesis

github.com

 

[secreto7]

Big changes for upcoming update

Workflow runs · jsgroth/jgenesis

Sega Genesis / Sega CD / SNES / Master System / Game Gear emulator - Workflow runs · jsgroth/jgenesis

github.com

I hope the dev doesn't deviate too much attention from Sega to the new GBA core.

 

[diet_orange]

I like Kega but a proper modern version is nice to see.

Kega has been THE standard for me for years. I still fail to see the need for stuff like Retro Arch. Just give me a decent emulator that can fully handle what the system is capable of and supposed to do without the need for extensive tinkering and or video guides

 

[Nelson2001 Nelson2001]

If all goes well, Jgenesis can be the spiritual successor to KEGA Fusion.

 

[secreto7]

@thecrow2313
Look at this

[SCD] add support for per-region BIOS config · jsgroth/jgenesis@b9a836a

I completely forgot I had that TODO in the README, oops

github.com

 

[Deleted member 132407]

@thecrow2313
Look at this

[SCD] add support for per-region BIOS config · jsgroth/jgenesis@b9a836a

I completely forgot I had that TODO in the README, oops

github.com

Will it have 32X Mega CD support? Do you have access to dev builds?

 

[secreto7]

Will it have 32X Mega CD support?

Support for Sega CD Mode 1 and Sega CD 32X · Issue #148 · jsgroth/jgenesis

These modes were rarely used, but for completeness' sake it would be nice to support them. Sega CD Mode 1 is where the hardware boots from the Genesis cartridge slot instead of the Sega CD BIOS, bu...

github.com

It seems the dev wanted to do it but he either forgot or got sidetracked.

 

[Deleted member 132407]

Support for Sega CD Mode 1 and Sega CD 32X · Issue #148 · jsgroth/jgenesis

These modes were rarely used, but for completeness' sake it would be nice to support them. Sega CD Mode 1 is where the hardware boots from the Genesis cartridge slot instead of the Sega CD BIOS, bu...

github.com

It seems the dev wanted to do it but he either forgot or got sidetracked.

Wondering why wasn't able to play Night Trap 32X CD version

 

[secreto7]

Wondering why wasn't able to play Night Trap 32X CD version

Pier Solar and the Great Architects Enhanced Soundtrack Disc (USA).cue error · Issue #215 · jsgroth/jgenesis

suppose to come up with

github.com

It seems he has to rework the structure of Sega CD to do it. Look at the comment.