NPC HACKING FAQ
By S. P. Gardebiter
Email: cacao@freenet.de

Additions by Kapow & Runelancer
12.2007

NPC.TBL has data for 361 entities (0000-0360). That's 0x0169 in hex.

The data is stored in sets, one for each entity parameter, with values 1, 2, or 4 bytes in length. 
Each set has 361 entries, one for each entity, then the next set begins back at entity 0000.
So, each set is a multiple of 169h bytes, and so the starting address of each set will be a multiple of 169h.


There are 11 sets:
0x0000 - Flags (DB - W)
0x02D2 - Health (DB - W)
0x05A4 - Tileset Number (B)
0x070D - Death Sound (B)
0x0876 - Hurt Sound (B)
0x09DF - Death Smoke (B)
0x0B48 - Experience (QB - DW)
0x10EC - Damage (QB - DW)
0x1690 - Collsion Bounding Box (seperate values)
0x1C34 - Display Bounding Box (seperate values)

The bounding boxes are 4 byte objects.

0x00 Left
0x01 Top
0x02 Right
0x03 Bottom

A sprite is always drawn using the top and left or right (depending on its direction) corner of the bounding box. This is offset from the center of the sprite, by the way: a 16x16 sprite with a bounding box of 8,8,8,8 is perfectly centered. 0,0,8,8 will offset it 8 pixels to the left/up.


Special Values (flags):

Byte 1:

0x01 - Solid
0x02 - No effect about Tile 44
0x04 - Invulnerable (Blink Sound)
0x08 - Ignore solid
0x10 - Bouncing at top
0x20 - Shootable
0x40 - Special Solid
0x80 - Rear and top attack power 0

Byte 2:

0x01 - Costum
0x02 - Call Event on Death
0x04 - Drop Hearts and EXP
0x08 - Is visible if FlagID is set
0x10 - Costum
0x20 - Call Event on Action
0x40 - Is invisible if FlagID is set	
0x80 - Show Damage Numbers


Tileset Value:

0x00 - 0x0F - Tilesets
0x10 - 0x1F - NPCsets

0x00 - Title
0x01 - ???
0x02 - Map Tileset
0x03 - ???
0x04 - ???
0x05 - ???
0x06 - Fade
0x07 - ???
0x08 - ItemImage
0x09 - ???
0x0A - ???
0x0B - ???
0x0C - ???
0x0D - ???
0x0E - ???
0x0F - ???

0x10 - MyChar
0x11 - Bullet
0x12 - ???
0x13 - Caret
0x14 - Sym
0x15 - Map NPCset 1
0x16 - Map NPCset 2
0x17 - NPCRegu
0x18 - ???
0x19 - ???
0x1A - ???
0x1B - ???
0x1C - ???
0x1D - ???
0x1E - ???
0x1F - ???


Smoke:

0x00 - None
0x01 - Small
0x02 - Medium
0x03 - Large


For sound numbers look into Tsc.txt.