MAME:Plugins and Scripts
From SpecNext Wiki
These MAME plugins may be of interest to Next developers and end-users:
nextfaststart
Minimizes MAME Next Machine boot time, by allowing code running inside the emulator to control MAME execution speed. Useful for developers. Release: Yes Source: Yes
skipstartupframes
Another plugin to spedup MAME boot time, by specifying a number of frames to run at full speed for each machine being emulated. More general, and useful for end-users. Release: Yes Source: Yes
debugstart
Allows to use the MAME debugger later, without compromising startup speed or needing keys to be pressed to continue. Release: Yes Source: Yes