NullDC4Wii

NullDC4Wii
General
Author(s)	Xale00, NullDC team, skmp, Flycast Team
Type	Console emulator
Version	alpha 0.28
Licence	MIT/GPL
Links
Download
Source
Peripherals

NullDC4Wii is a port of NullDC originally coded by skmp. This is a Dreamcast Emulator.

Installation

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BIOS File

Mandatory BIOS files in SD:/data/ (for dolphin) or SD:/apps/nulldc4wii/ (Real Wii)

- dc_boot.bin
- dc_flash.bin
- fsca-table.bin

Optional BIOS files in SD:/data/ (for dolphin) or SD:/apps/nulldc4wii/ (Real Wii)

- dc_flash_wb.bin
- syscalls.bin
- IP.bin

- dc_nvmem.bin
- vmu_default.bin

Game File

Game file in SD:/discs/ or USB:/dreamcast/ Put your folders with GDI in this directory

ELF do not work

Might work for BIN / CUE / CDI / ISO / NRG / MDS, let me know please !

Controls

Wiimote and Gamecube

In Menu

Only Wiimote for now

In Game

?

Graphical Setting

Use LOW for 2D and heavy 3D games

Use NORMAL for other games

History

Alpha 0.28 - June 10, 2026

AICA ARM Implemented => Sound begin to work (still choppy)

CDI File supported

Alpha 0.25

Game preset added

Graphic better = Ryo's head now displaying in Shenmue

Alpha 0.23

Added special inputs

- Light Gun

- Maracas

- Keyboard

- Fishing Rod

Alpha 0.22

2 player mode implemented

Can load game from USB

Alpha 0.21

CACHE improved - close to perfect (to the loss of FPS...)

Alpha 0.20

USB Key support

Alpha 0.19

4BPP and 8BPP palette conversion are now better

Alpha 0.17

Some fuzzy Elements now display without glitch

4BPP and 8BPP palette conversion started

Alpha 0.13

Fixed a Regression

Alpha 0.11

Fixed some Fuzzy text

Alpha 0.10

Lots of textures fixed (VQ Texture now display)

Alpha 0.09

Some texture & color fixed

Alpha 0.08

RATIO : choose between FULLSCREEN and 4/3 (still buggy for some games)

Alpha 0.06 - March 1, 2026

Faster Loading times

Alpha 0.05 - February 15, 2026

FPS boost +30% to +100%

Alpha 0.04 - February 04, 2026

Controller Mapping changes

Alpha 0.03 - January 25, 2026

Added game selector : Navigate trough folder & file

Alpha 0.02 - January 22, 2026

Launches on both Dolphin and a Real Wii

Can navigate trough menu (Bios)

Tryed with Sega Tetris, slow, buggy but it runs

Youtube video

Alpha 0.04

About that obscure version that was made years ago : a Youtube video was uploaded a while ago but the channel was terminated

See

https://www.reddit.com/r/WiiHacks/comments/fet6lg/wii_dreamcast_emulator/?tl=fr

https://web.archive.org/web/20190926010816/https://www.youtube.com/watch?v=8b8RsEBCLhs

Game Comptability

The compatibility list for NullDC4Wii can be found here.

Thanks

Xale00, Skmp, NullDCcontributors, DevkitPPC/libogc