Air Buster (Genesis)
Also known as: Aero Blasters (JP)
This game has unused code.
A port of Kaneko's arcade shoot-em-up.
Located at $000318-000343 is code to run a checksum and compare the result to the value stored at $00018E, which is seen in many Genesis titles. In this game, it's branched over instead. Even if the block of code were to execute, the branch that determines the checksum status was replaced with two 4E 71 NOP commands.
Unused Configuration Mode Branch
The Configuration Mode has seven available selections, but the jump table that executes the code for each includes an 8th branch command that goes unused. It's located at $001434 in Aero Blasters and $001414 in Air Buster. It branches to the same address as the previous entry, which is the programming to exit Configuration Mode.
The US title screen's logo is different from the Japanese version's, being pretty much the same as the one in the arcade game: it's smaller, it merges the title into one row, the planes in the top-right being in opposite directions, missing the smaller Aero Blasters entirely, and having a different Trouble Specialty font among several other small differences.
Cleanup > Pages missing developer references
Cleanup > Pages missing publisher references
Games > Games by content > Games with regional differences
Games > Games by content > Games with unused code
Games > Games by developer > Games developed by Kaneko > Games developed by Inter State Software
Games > Games by platform > Genesis games
Games > Games by publisher > Games published by Kaneko
Games > Games by release date > Games released in 1991