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Difference between revisions of "RAC file"
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Fascination TODO - RAC file: Add details on header
Strangerke (talk | contribs) (Fascination TODO- Add first elements of RAC file structure) |
Strangerke (talk | contribs) (Fascination TODO - RAC file: Add details on header) |
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it contains, for all the missing file, their name, address and size (between others). | it contains, for all the missing file, their name, address and size (between others). | ||
The structure of the file is the | The structure of the file is the following: | ||
'''Header:''' | '''Header:''' | ||
18 bytes, contains a version, arraysize1 and arraysize2 | 18 bytes, contains a version, arraysize1 and arraysize2 | ||
* 2 bytes: magic number, must be equal to 0x0300 | |||
* 2 bytes: arraySize1 | |||
* 2 bytes: arraySize2 | |||
* 4 bytes: dummy, overwritten in memory by array1 address (unused for Fascination) | |||
* 4 bytes: dummy, overwritten in memory by array2 address | |||
* 4 bytes: unused ? | |||
'''Body:''' | '''Body:''' | ||
* | * unknownArray: arraySize1 * 14 bytes (unused for Fascination), not encrypted | ||
* | * missingFileArray : arraySize2 * 30 bytes, encrypted | ||
The encryption of the missing file array is a simple XOR. | The encryption of the missing file array is a simple XOR. | ||
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missingFileArray[i] ^= (i * i); | missingFileArray[i] ^= (i * i); | ||
The structure of this array is then, for each 30 bytes in it: | The structure of this array is then, for each 30 bytes block in it: | ||
* 14 bytes: filename | * 14 bytes: filename | ||
* 10 bytes: unknown (containing the offset on the CDROM ?) | * 10 bytes: unknown (containing the offset on the CDROM ?) | ||
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It's interesting to notice that, in this RAC file, | It's interesting to notice that, in this RAC file, | ||
* Coktel used 'intro.stk' name instead of 'disk0.stk' in the other versions | * Coktel used 'intro.stk' name instead of 'disk0.stk' in the other versions of Fascination | ||
* the track audio is present and named 'FASCI1N.SON'. Of course, We don't need this file. | * the track audio is present and named 'FASCI1N.SON'. Of course, We don't need this file. | ||