This very simple hack adds the “slow controls” feature of the SNES port to the Neo Geo.

When playing the game, hold down B to enter “precise mode”. Then pressing left or right will only move the shooter by one position each time. This allows you to position the shooter exactly where you want it when doing trickier shots.

To apply the patch:

• Unzip pbobblen.zip, make sure it is a version intended for MAME
• Apply the patch to d96-07.ep1
• Make sure the patched rom is still named d96-07.ep1 and overwrote the original one
• Zip all the files back up into a new pbobblen.zip
• Launch the game in MAME

NOTE: if you try to launch the game from MAME’s UI, it will not let you as it will notice the ROM is different. You will need to use the command line to launch it.