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# Genesis Plus GX Wide - RetroBIOS

Type | libretro
Classification | enhanced_fork
Source | https://github.com/libretro/Genesis-Plus-GX-Wide
Upstream | https://github.com/ekeeke/Genesis-Plus-GX
Version | v1.7.4
Profiled | 2026-03-23
Cores | genesis_plus_gx_wide
Systems | sega-megadrive, sega-megacd, sega-mastersystem, sega-gamegear, sega-sg1000, sega-pico

Technical notes

Widescreen hack of Genesis Plus GX by heyjoeway. Adds automatic widescreen rendering to Mega Drive games. BIOS loading identical to standard Genesis Plus GX (libretro.c:3547-3558).

12 files | 3 required, 9 optional | 12 in repo, 0 missing

`bios_CD_U.bin` -required

- System: sega-megacd
- Size: 128.0 KB
- Source: `core/loadrom.c:408`
- Platforms: batocera, emudeck, lakka, recalbox, retroarch, retrobat, retrodeck, retropie

`bios_CD_E.bin` -required

- System: sega-megacd
- Size: 128.0 KB
- Source: `core/loadrom.c:411`
- Platforms: batocera, emudeck, lakka, recalbox, retroarch, retrobat, retrodeck, retropie

`bios_CD_J.bin` -required

- System: sega-megacd
- Size: 128.0 KB
- Source: `core/loadrom.c:414`
- Platforms: batocera, emudeck, lakka, recalbox, retroarch, retrobat, retrodeck, retropie

`bios_U.sms` -optional

- System: sega-mastersystem
- Source: `core/loadrom.c:510`
- Platforms: lakka, recalbox, retroarch, retropie

`bios_E.sms` -optional

- System: sega-mastersystem
- Source: `core/loadrom.c:513`
- Platforms: lakka, recalbox, retroarch, retropie

`bios_J.sms` -optional

- System: sega-mastersystem
- Source: `core/loadrom.c:516`
- Platforms: lakka, recalbox, retroarch, retrodeck, retropie

`bios.gg` -optional

- System: sega-gamegear
- Source: `core/loadrom.c:479`
- Platforms: lakka, recalbox, retroarch, retrodeck, retropie

`bios_MD.bin` -optional

- System: sega-megadrive
- Size: 2.0 KB
- Source: `libretro/libretro.c:3682`
- Platforms: lakka, recalbox, retroarch, retrodeck, retropie

`ggenie.bin` -optional

- System: sega-megadrive
- Size: 32.0 KB
- Source: `core/cart_hw/ggenie.c:64`
- Platforms: lakka, retroarch, retrodeck, retropie

`areplay.bin` -optional

- System: sega-megadrive
- Size: 64.0 KB
- Source: `core/cart_hw/areplay.c:64`
- Platforms: lakka, retroarch, retrodeck, retropie

`sk.bin` -optional

- System: sega-megadrive
- Size: 2.0 MB
- Validation: size
- Source: `core/cart_hw/md_cart.c:750`
- Platforms: lakka, retroarch, retrodeck, retropie

`sk2chip.bin` -optional

- System: sega-megadrive
- Size: 256.0 KB
- Validation: size
- Source: `core/cart_hw/md_cart.c:756`
- Platforms: lakka, retroarch, retrodeck, retropie

Generated on 2026-03-25T14:56:43Z