Difference between revisions of "Auto detection"

Auto detection (view source)

Revision as of 18:04, 10 April 2005

63 bytes added , 18:04, 10 April 2005

→‎Detection

Fingolfin

1,079

edits

@@ Line 63: / Line 63: @@
 === Detection ===
-TODO: Detection should be able to take "hints" from the user; i.e. if "indy3" is specified, then we'll assume any 00.LFL we encounter to be part of "indy3".
+Detection should be able to take "hints" from the user; i.e. if "indy3" is specified, then we'll assume any 00.LFL we encounter to be part of "indy3".
-For 00.LFL files, to distinguish OLD_BUNDLE vs. SMALL_HEADER: look at first two bytes of the file:
-xF701 (or 0xF7010000), bytes 5+6 are '0R' -> V3 small header
-xFFFE -> V2 or V3 old bundle (really is 0x0001, XOR encoded using 0xFF)
-xCEF5 -> V1 game (really is 0x0A31, XOR encoded using 0xFF)
-For 000.LFL files (V4 games:loomcd, monkeyega, monkeyvga, pass), bytes 5+6 are 'RN', not encoded (corresponds to 'RNAM' in newer games).
-For *.000 files: they start with 0x3b272824 ('RNAM' XOR encoded using 0x69)
-For *.la0 files: they also start with 'RNAM', not encoded this time.
-For *.he0 files: Apprently they start with MAXS, encoded; sometimes also with RNAM.
+Files can be distinguished by their content as follows:
+* For 00.LFL files, to distinguish OLD_BUNDLE vs. SMALL_HEADER: look at first two bytes of the file:
+** 0xF701 (or 0xF7010000), bytes 5+6 are '0R' -> V3 small header
+** 0xFFFE -> V2 or V3 old bundle (really is 0x0001, XOR encoded using 0xFF)
+** 0xCEF5 -> V1 game (really is 0x0A31, XOR encoded using 0xFF)
+* For 000.LFL files (V4 games:loomcd, monkeyega, monkeyvga, pass), bytes 5+6 are 'RN', not encoded (corresponds to 'RNAM' in newer games).
+* For *.000 files: they start with 0x3b272824 ('RNAM' XOR encoded using 0x69)
+* For *.la0 files: they also start with 'RNAM', not encoded this time.
+* For *.he0 files: Apprently they start with MAXS, encoded; sometimes also with RNAM.
 === Proposals ===
 I have no complete proposal yet, only various ideas for parts of the problem; I am still working on putting them all together into one coherent solution, so bear with me; this is all relatively new.