All I know is I love dc, and when I upgraded to the new beta, I just couldn't get chankast working again in max. I hunted and found null dc which in my opinion runs better on newer hardware. Here is the update notes on the 2.10 b2 beta.
Maximus Arcade 2.10 beta 2
- Right-mouse click accessible menu for exiting game/emulator/frontend available on black screen after launching game
- Support for Future Pinball 1.6 emulator
- Support for Raine 0.50.5 emulator
- Support for Sega Model 2 emulator
- Support for NullDC emulator (Sega Dreamcast)
- Support for Capcom Play System 3 emulator (CPS3)
- Support for Ultra 64 (U64) emulator (Killer Instinct 1/2)
- Support for Spectaculator emulator (Sinclair ZX Spectrum)
- Support for NeoGeo CD (cue/iso) in Nebula 2.25
- Added HD resolution 1920x1080 (1080p)
- Added extension ".sfc" to SNES scan list
- Pre-Launch and Post-Launch executables applicable to each emulator setup
- Command line parameters available
- Variables %name, %dir, %parent, %desc are available in command line
- Select window state its launched into (minimize, maximize, hidden, normal)- Command line parameters available for individual games through the 'Game List' tab in preferences
- Variables %file, %name, %dir, %parent, %desc are available in command line
- Command line parameters are saved into an easily accessible text file for manual updating
- Command line overrides emulator generated command line- Refined the history.dat parsing for MAME
- More sections are filtered properly
- Increased font size for readability
- History.dat can now be distributed with MA- Fixed Flash Player (was broken in beta 1)
- Slightly relaxed the keystroke polling when MA is a background task
- Added screenshot to movie delay option
- Tweaked the preferences
- Fixed miscellaneous bugs