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Difference between revisions of "SCUMM/Technical Reference/Index File"
SCUMM/Technical Reference/Index File (view source)
Revision as of 12:46, 16 April 2007
, 12:46, 16 April 2007More information about V3/4 Index with examples
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* Block Size does not include the 6 bytes used up by Block Name and Block Size, it's the size of the data that follows. | * Block Size does not include the 6 bytes used up by Block Name and Block Size, it's the size of the data that follows. | ||
To read in the data, the following pseudo-code can be used: | |||
==RN== | Read Number of Items | ||
FROM 1 to "Number of Items" DO | |||
Read subvalue 1 | |||
Read subvalue 2 | |||
END | |||
==RN - Room names == | |||
Block Size (4 bytes) | Block Size (4 bytes) | ||
| Line 107: | Line 115: | ||
Block Name (2 bytes) | Block Name (2 bytes) | ||
No of items (2 bytes) | No of items (2 bytes) | ||
File Number (1 byte) | |||
Offset (4 bytes) | |||
''File Number'' is interesting if a game is splitted on multiple disks. 0 means ''not used''. | ''File Number'' is interesting if a game is splitted on multiple disks. 0 means ''not used''. | ||
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Block Name (2 bytes) | Block Name (2 bytes) | ||
No of items (2 bytes) | No of items (2 bytes) | ||
Room Number (1 byte) | |||
Offset (4 bytes) | |||
The global scripts are stored in this directory. | The global scripts are stored in this directory. The offsets are relative to the room. | ||
==0N== | ==0N - Directory of Sounds == | ||
Block Size (4 bytes) | Block Size (4 bytes) | ||
Block Name (2 bytes) | Block Name (2 bytes) | ||
No of items (2 bytes) | No of items (2 bytes) | ||
Room Number (1 byte) | |||
Offset (4 bytes) | |||
Similar to scripts but holds indexes for sounds. | |||
==0C== | ==0C - Directory of Costumes == | ||
Block Size (4 bytes) | Block Size (4 bytes) | ||
Block Name (2 bytes) | Block Name (2 bytes) | ||
No of items (2 bytes) | No of items (2 bytes) | ||
Room Number (1 byte) | |||
Offset (4 bytes) | |||
Similar to scripts but holds indexes of customes. | |||
==0O== | ==0O - Directory of Objects== | ||
Block Size (4 bytes) | Block Size (4 bytes) | ||
Block Name (2 bytes) | Block Name (2 bytes) | ||
No of items (2 bytes) | No of items (2 bytes) | ||
Owner+state (1 byte) | |||
The Object owner and state are encoded in one byte. Example: | |||
0xA2 → Owner = 0xA, State = 0x2 | |||
The pseudo decode code would be: | |||
Owner = ( (Owner+state Byte) AND 0xF0) >> 4 | |||
State = (Owner+state Byte) AND 0x0F | |||
= Scumm 5 = | = Scumm 5 = | ||