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Decompile
Convert BF and BMD into flowscripts and messagescripts
As previously mentioned, AtlusScriptCompiler can decompile
.BF
and .BMD
into .FLOW
and .MSG
respectively. This allows us to view scripts in plain text and edit to our liking.First, you must tell the program what file we're working with.
For decompiling, this must be a
.BF
or .BMD
file.C:\Users\Username>"C:\Path\To\AtlusScriptCompiler.exe" "C:\Path\To\input.bmd"
You can simply drag
AtlusScriptCompiler.exe
and then input.bmd
onto the command prompt window.
This will automatically wrap each paths in quotes, which keeps arguments separate in case your paths contain spaces.Now, let's tell the program what to do with that file.
Add
-Decompile
, separated by a space.C:\Users\Username>"C:\Path\To\AtlusScriptCompiler.exe" "C:\Path\To\input.bmd" -Decompile
A Flowscript Library instructs the compiler on function names and parameters.
In order to work with the input file, you have to tell the compiler which Library to use with
-Library
.C:\Users\Username>"C:\Path\To\AtlusScriptCompiler.exe" "C:\Path\To\input.bmd" -Decompile -Library P5
Library Name | Usage |
DigitalDevilSaga | -Library DDS |
Nocturne | -Library SMT3 |
Persona3 | -Library P3 |
Persona3FES | -Library P3FES |
Persona3Portable | -Library P3P |
Persona4 | -Library P4 |
Persona4Golden | -Library P4G |
Persona5 | -Library P5 |
Persona5Royal | -Library P5R |
PersonaQ2 | -Library PQ2 |
Not all games have libraries available. Knowledge of reverse engineering game executables is required to generate a library, as you'll have to find the offsets of function signatures yourself. A sample script for dumping that data from P3/P4 (PS2) can be seen here.
An Encoding can be specified using
-Encoding
.
It lets the compiler know what set of characters to use.C:\Users\Username>"C:\Path\To\AtlusScriptCompiler.exe" "C:\Path\To\input.bmd" =Decompile -Library P5 -Encoding P5
Game Name | Usage |
Persona 5 | -Encoding P5 |
Persona 4 | -Encoding P4 |
Persona 3 (FES) | -Encoding P3 |
PersonaQ(2)
or any game using
Shift-JIS/CP932 | -Encoding SJ |
Finally, you can name the Output File using
-Out
.C:\Users\Username>"C:\Path\To\AtlusScriptCompiler.exe" "C:\Path\To\input.bmd" -Decompile -Library P5 -Encoding P5 -Out "C:\Path\To\output.msg"
If
-Out
is not specified, it will default to the input filename and folder, but with the output filetype appended. In this case, that would be C:\Path\To\input.bmd.msg
.At this point, you can press
Enter
to begin decompiling.To learn how to put a new or edited script back in the game, keep reading.
Last modified 2yr ago