NullDC

nullDC

Developer(s)	drkIIRaziel, skmp
Last version	2.0.0-pre [+]
Active	Yes
Platform(s)	Windows Linux macOS
Emulates	Dreamcast NAOMI
Website	[1]
Programmed in	Rust
License	MIT
Source code	GitHub
BIOS/Keys	Required

nullDC is an open-source Dreamcast and Naomi emulator. It was superseded by its fork reicast and later by Flycast. Long inactive, it's been revived in 2025 having polyfilled large parts of the codebase from devcast/reicast transcribed to Rust (with still a lot of code remaining to be updated).

Download

	nullDC builds
	nullDCe Alpha Build
	nullDC Beta Build
	nullDC-360 Build

Guides and info

• Setup guide

Common problems and fixes

1. nullDC doesn't recognize your 360/PS3 controller? Go to Options -> Select Plugins... and change Input plugin to PuruPuru Dreamcast Controller. Then, go to Options -> Maple -> Port X -> Config keys... and select Xinput in Controller Type.
2. nullDC has an option for the rumble pack. Once the controller is set up, It can be found in Options -> Maple -> Port X -> Subdevice 2 -> Attach Puru Puru Pak [XInput]. This will allow you to replicate the rumble pack for your controller. (If the controller includes rumble, and if the game includes rumble.)
3. If you are playing a game and there is a problem displaying things onscreen, or they are missing. It is most likely a problem with the "Z-Buffer Mode" which can be found in Options -> PowerVR -> Z-Buffer Mode. Set it to "D24FS8" (2nd option) and the problem with displaying the item should be fixed. (An example of this, is the small watch icon in Shenmue not displaying. By changing the Z-Buffer Mode to "D24FS8" it should fix this.)
4. Disc swapping isn't fully supported, it works for some games and doesn't work for other like D2 or RE: Code Veronica.