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Game works in MAME but not Launchbox


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In MAME I have a game that, before launching asks what BIOS to use (see screenshot). Only 1 bios seems to work properly and, of course, it's not the bios Launchbox is choosing (I get no prompt to select bios when launching in Launchbox).

What can I do to tell Launchbox which bios to use?


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LaunchBox doesn't choose your MAME bios.  You can tell MAME via the command-line which one to load, but more easily would be to open MAME, select (not start) that game, select Configure Machine, under the BIOS heading, select the bios that works, then select Save Machine Configuration.  That bios will now be the default one loaded and you shouldn't see that prompt again. (hopefully)

If MAME still keeps asking even after setting that up, at MAME's main screen select Configure Options, then Miscellaneous Options, and the set Skip BIOS selection menu to on.

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