ROM Hack gba asm Question?

[kenghot]

Now i strat to debug ffv . Now i use Tracer-vgba to trace command in gba and i got some trace.log. Could some body tell me what is the command of arm7 that perform which button that user press? and how do i know that's 'A' button.

 

[dblank]

Does this help? (from http://nocash.emubase.de/gbatek.txt)

Keypad Input
------------

The built-in GBA gamepad has 4 direction keys, and 6 buttons.

4000130h - KEYINPUT - Key Status Â
Bit Expl.
0 Button A (0=Pressed, 1=Released)
1 Button B (etc.)
2 Select (etc.)
3 Start (etc.)
4 Right (etc.)
5 Left (etc.)
6 Up (etc.)
7 Down (etc.)
8 Button R (etc.)
9 Button L (etc.)

 

[kenghot]

Million Thanks, dblank
This link of document is really great.

i'll try to study with it.

 

[dblank]

Right on, glad I could help!

 

[kenghot]

after i read documents, i found that gba has bios function to decompress data for LZ77, the command is "swi $11" . so i use program "Visualboy Advance Tracer" to keep log of asm command. but when i search in log file (it's about 100,00 lines) i just found only one line of "swi $11". Did i do something wrong?

another question, Can i dump vram or wram and then search for dialog text such as "Hell" in dump file.

Thanks

 

[FAST6191]

Open up VBA (I use Kode54's build for any hacking like this as it has SSE2 support: http://board.zsnes.com/phpBB2/viewtopic.ph...r=asc&start=145 ) and hit tools memory viewer.
Now hit save and type the start address (02000000=WRAM and 03000000=IRAM) and the length you want to dump in hex. Hit OK choose a destination and there will appear a .dmp file the contents of which are the contents of the memory at the point of dumping, given what you have accomplished so far I assume you can work a hex editor.

 

[kenghot]

Thanks again FAST6191,
Yes i can use hex editor and understand it well. i've load file form your link but can not run. i got message "This application has failed to start because d3d9.dll was not found." . did i miss somthing?

Thanks again.

 

[FAST6191]

That sounds like a directx error, this being said any build of VBA will do that is just an especially fast one.