The rest of the BG removal codes

I went ahead and did this for the rest for the hitboxed games, threw in a few extra too.

• MAME format

The current tally:

sf2 sf2ce sf2hf ssf2 ssf2t hsf2 sfa sfa2 sfz2al sfa3 dstlk nwarr vsav vhunt2 vsav2 ringdest cybots sgemf xmcota msh xmvsf mshvsf mvsc

fatfury1 fatfury2 fatfursp fatfury3 rbff1 rbffspec rbff2 garou kof94 kof95 kof96 kof97 kof98 kof99 kof2000 kof2001 kof2002 kof2003 svc

• Boldface mean no ROM writes were required. That means they probably work both parents and clones and are easily convertible to FBA format.
• Italic means I was unable to get rid of the HUD.
• The BG color in all the NeoGeo games can be controlled by editing a single value.

I got all warmed up working with the debugger and cheat engine, so I figured to just finish these. I figured out how to set a watchpoint and then look at the pointer stack (register A7 for the 68k) to see where the current function was called from. Then I'd look up those PC addresses in a disassembly window (ctrl-D) to find a likely function call to dummy out. This is much less tedious than crawling through trace dumps, though sometimes I can't follow where the stack is going.

Despite all this I still don't know how the graphics are processed at the lowest level, and all of these codes are highly specific in what they target. (Can't understand a single line of this or this.) If I knew better, I could come up with more reliable methods.

Anyways, I consider these a necessary part of the job of making the hitboxes viewable. It ain't likely all these will get their boxes documented, but I don't want anyone to complain for lack of tools.

• part 1
• part 2
• part 3
• part 4