Difference between revisions of "SA SCM"
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A scm file is a binary file with certain structure. The common information about what this file is for can be found [[Mission_Scripting_(Overview)|here]]. The scm file structure looks like the following: | A scm file is a binary file with certain structure. The common information about what this file is for can be found [[Mission_Scripting_(Overview)|here]]. The scm file structure looks like the following: | ||
| − | (02 00 01)h + 32 bit int Jump to second segment | + | (02 00 01)h + 32-bit int Jump to second segment |
byte Target game ('s' - San Andreas for SA) | byte Target game ('s' - San Andreas for SA) | ||
(Global vars) Space for variable saving | (Global vars) Space for variable saving | ||
| − | (02 00 01)h + 32 bit int Jump to third segment | + | (02 00 01)h + 32-bit int Jump to third segment |
byte Segment id | byte Segment id | ||
| − | 32 bit int Number of models | + | 32-bit int Number of models |
| − | ( | + | (Model names) 24 byte model names * number of models (model 0 name is empty and therefore unused) |
| − | (02 00 01)h + 32 bit int Jump to fourth segment | + | (02 00 01)h + 32-bit int Jump to fourth segment |
byte Segment id | byte Segment id | ||
| − | 32 bit int MAIN size | + | 32-bit int MAIN size |
| − | 32 bit int Largest mission size | + | 32-bit int Largest mission size |
| − | 16 bit int Number of total missions | + | 16-bit int Number of total missions |
| − | 16 bit int Number of exclusive missions | + | 16-bit int Number of exclusive missions |
| − | 32 bit int Highest number of locals used in mission/exernal | + | 32-bit int Highest number of locals used in mission/exernal |
| − | ( | + | (Mission addresses) 32 bit addresses * number of missions |
| − | (02 00 01)h + 32 bit int Jump to fifth segment | + | (02 00 01)h + 32-bit int Jump to fifth segment |
byte Segment id | byte Segment id | ||
| − | 32 bit int Largest external size | + | 32-bit int Largest external size |
| − | 32 bit int Number of externals | + | 32-bit int Number of externals |
| − | ( | + | (External data): 28 byte external data * number of externals |
20 bytes Name of external | 20 bytes Name of external | ||
| − | 32 bit int Offset of external | + | 32-bit int Offset of external |
| − | 32 bit int Size of external | + | 32-bit int Size of external |
| − | (02 00 01)h + 32 bit int Jump to sixth segment | + | (02 00 01)h + 32-bit int Jump to sixth segment |
byte Segment id | byte Segment id | ||
| − | 32 bit int (Unused, always 0) | + | 32-bit int (Unused, always 0) |
| − | (02 00 01)h + 32 bit int Jump to seventh segment | + | (02 00 01)h + 32-bit int Jump to seventh segment |
byte Segment id | byte Segment id | ||
| − | 32 bit int Size of global var space | + | 32-bit int Size of global var space |
| − | 8 bit int Number of allocated externals (with [[07D3]], [[0884]], [[0928]] or [[0929]])? (unused, always 3Eh) | + | 8-bit int Number of allocated externals (with [[07D3]], [[0884]], [[0928]] or [[0929]])? (unused, always 3Eh) |
| − | 8 bit int Number of unused externals ('''HOME_BRAINS''' and '''AAA''')? (unused, always 2) | + | 8-bit int Number of unused externals ('''HOME_BRAINS''' and '''AAA''')? (unused, always 2) |
| − | 16 bit int (Unused, always 0) | + | 16-bit int (Unused, always 0) |
(MAIN code) MAIN section, equal to size defined earlier | (MAIN code) MAIN section, equal to size defined earlier | ||
| − | ( | + | (Mission code) The mission data, missions stored at offsets defined earlier |
The '''AAA''' external script is very odd as the sixth segment is copied inside. The following bytes are just padding to align the file size to the nearest 2KB, like also in the working externals. | The '''AAA''' external script is very odd as the sixth segment is copied inside. The following bytes are just padding to align the file size to the nearest 2KB, like also in the working externals. | ||
Revision as of 17:19, 6 June 2015
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This article may need to be rewritten. Please help improve this article. The discussion page may contain suggestions. |
A scm file is a binary file with certain structure. The common information about what this file is for can be found here. The scm file structure looks like the following:
(02 00 01)h + 32-bit int Jump to second segment
byte Target game ('s' - San Andreas for SA)
(Global vars) Space for variable saving
(02 00 01)h + 32-bit int Jump to third segment
byte Segment id
32-bit int Number of models
(Model names) 24 byte model names * number of models (model 0 name is empty and therefore unused)
(02 00 01)h + 32-bit int Jump to fourth segment
byte Segment id
32-bit int MAIN size
32-bit int Largest mission size
16-bit int Number of total missions
16-bit int Number of exclusive missions
32-bit int Highest number of locals used in mission/exernal
(Mission addresses) 32 bit addresses * number of missions
(02 00 01)h + 32-bit int Jump to fifth segment
byte Segment id
32-bit int Largest external size
32-bit int Number of externals
(External data): 28 byte external data * number of externals
20 bytes Name of external
32-bit int Offset of external
32-bit int Size of external
(02 00 01)h + 32-bit int Jump to sixth segment
byte Segment id
32-bit int (Unused, always 0)
(02 00 01)h + 32-bit int Jump to seventh segment
byte Segment id
32-bit int Size of global var space
8-bit int Number of allocated externals (with 07D3, 0884, 0928 or 0929)? (unused, always 3Eh)
8-bit int Number of unused externals (HOME_BRAINS and AAA)? (unused, always 2)
16-bit int (Unused, always 0)
(MAIN code) MAIN section, equal to size defined earlier
(Mission code) The mission data, missions stored at offsets defined earlier
The AAA external script is very odd as the sixth segment is copied inside. The following bytes are just padding to align the file size to the nearest 2KB, like also in the working externals.
