Jatre Specter set 1 - Select A or B Game

[Lucky1]

How do you choose between A or B game in Jatre Spectre (Set 1). It says A for professional. How do I select the B game mode?

[nexusmtz]

Hold right when starting a game.

If you're asking how you do it in MAME, it seems to only work in versions 112 to 139. (added in 111.u cycle)

[Lucky1]

Hold right when starting a game.

If you're asking how you do it in MAME, it seems to only work in versions 112 to 139. (added in 111.u cycle)

I see.
Thank you Sir.