I can't seem to determine what the default keys were.
Look at the file ctrlr\std.ini. It lists the standard mame defaults, which mame32 uses. But look next comment.
I [snip] deleted all the files from my config directory in MAME but it still appeared to hold some of my custom control settings. Could any help me in determining either the default controls or provide a way to truly reset MAME/MAME32 to the original default controls. Thanks!
Scott Albright
Mame32 saves cfg data in the windows registry. Start up regedit.exe, go to HKEY_CURRENT_USER\Freeware\mame32, and delete the mame32 folder.
Do not delete anything else! Exit regedit. All mame32 defaults will be returned to normal.
You can really mess up windows if you delete the wrong stuff, so be careful, and I am not responsable for any mistakes you make.