Zitat von
hap
Super Sensor IV also works. This one detects when it is turned off and quickly does an NMI(non maskable interrupt). In there, it saves a checksum of the nvram, and then checks it on next power on.
SS4 power-off can be faked with a button, F1 in MAME.
Ah ok, I've looked for such an 'Off' key, but this F1 is not listed in MESSUI's 'Options > Keyboard' menu - it only appears in the Tab menu (but usually I don't use this).