This game has a hidden developer message.
Bonze: An antiquated English name for a Buddhist monk, now commonly referred to as a bhikku.
To activate a round select feature, hold the Service Coin button until a "SERVICE SW FAILED" message pops up on the screen. Then, press 1P Start (x3), Service Coin, 1P Start. Start a new game and the round select menu should pop up.
At one point, flipping Dip Switch B8 gave access to a screen editor after starting a new game. This has been disabled in the code by just skipping that check entirely, but putting the following code in MAME's bonzeadv.xml (or any of the derived sets') cheat file and enabling it will fix that.
<cheat desc="Fix Debug Switch"> <script state="off"> <action>maincpu.mw@007572=6034</action> </script> <script state="run"> <action>maincpu.mw@007572=4E71</action> </script> </cheat>
Unfortunately, even after fixing that check, it's more of a screen viewer than an editor. The "Select Code" variable, which would be used to set block properties (Solid, lava, ice, etc.) is broken, and can no longer be controlled by the player. Plus, at this point, it's no longer possible to actually edit anything. Still, it's something, right?
There's additional text for the screen editor at 0x11A55 that's no longer referenced anywhere in the code:
SELECT EDIT MODE SCREEN : OBJ
Title Screen Placeholder
<cheat desc="Draw Temporary Title"> <script state="off"> <action>maincpu.mw@008814=00D8</action> </script> <script state="run"> <action>maincpu.mw@008814=DC14</action> </script> </cheat>
Hidden Developer Text
ねむい translates to "I'm sleepy."
In the old version of Bonze's Adventure (bonzeadvo in MAME), the game doesn't always properly reset the bit that tracks when the player is crouching. Since crouching and pressing Button 1 uses the player's magic, this is a bit of a problem.
This was fixed in later versions by resetting that bit every frame.