CBM64 Bard's Tale 1 Disassembly
The files NMa0 to NMaf are dungeon files. They cannot start below NMa0, but can exceed NMaf, as you proved with Mangar level 6. They do not necessarly need to load to the address that is indicated in the file's first 2 bytes. BT tends to load things at different addresses than they were saved from. This is because the used editors might have used a different workspace in memory than the BT engine needs the files at.
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1b 0c 0d 0e 0b 00 0f 10 1c 1d 1e 11 12 14 13 1f
20 21 22 23 24 25 15 26 27 28 29 2a 2b 2c 2d 2e
2f 16 18 17 30 31 32 33 34 19 35 36 37 38 39 3a
3b 3c 3d 3e 3f 40 41 42 43 44 So are the above NMxx files all the events as listed in that table?
Well....
The chart is here now, thats fine I think. Most programmers won't need it, but for the others it is here as an assisting tool.
The event lookup table is complete. In the map files an offset into this table is given, the resulting loaded event is NM + number from lookup table.
Yes, presently I am disassembling the Guild event, which is the last of the city events. Thereafter I will continue with the dungeon events.
The chart is here now, thats fine I think. Most programmers won't need it, but for the others it is here as an assisting tool.
The event lookup table is complete. In the map files an offset into this table is given, the resulting loaded event is NM + number from lookup table.
Yes, presently I am disassembling the Guild event, which is the last of the city events. Thereafter I will continue with the dungeon events.
Wait a minute here...if it's been relocated on certain boot disks then that means it can be modified, correct?ZeroZero wrote:That strongly depends on the boot disk version you have.
It is in a file, that normally is hidden.
I suggest to search the disk in hex edit for some bytes of
the table, you should find it soon.
I've located the dungeon events jump table on the BTI boot disk.
It should be found in the file EA3.PRG, at addresses $132B through $1364:
Now, there is some concern about adding loadable dungeon events to the dungeon disk due to having to extend this table, and doing so might corrupt the game data. However, consider the next three bytes beyond the table ($1365 to $1367):
There is no NM1A.PRG, NM8D.PRG, or NM1B.PRG on the dungeon disk, meaning at least three more events can be safely put on the disk.
Thoughts?
It should be found in the file EA3.PRG, at addresses $132B through $1364:
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1b 0c 0d 0e 0b 00 0f 10 1c 1d 1e 11 12 14 13 1f
20 21 22 23 24 25 15 26 27 28 29 2a 2b 2c 2d 2e
2f 16 18 17 30 31 32 33 34 19 35 36 37 38 39 3a
3b 3c 3d 3e 3f 40 41 42 43 44Code: Select all
1A 8D 1BThoughts?