Entry

Entries are the intermediate level data containers in NSF files. They are containers for 'items'-the lowest level data containers in NSF files.

Format

Offset	Field	Size	Value
0x0	Magic Number	4 bytes	0x100FFFF
0x4	ID	4 bytes	*
0x8	Type	4 bytes	*
0xC	Item Count	4 bytes	c
0x10	Item Offsets	c x 4 bytes	*
0x10 + (c x 4)	Items	c x * bytes	*

Structure

struct entry
{
  const unsigned long magic = 0x100FFFF;
  unsigned long EID;
  unsigned long type;
  unsigned long itemcount;
  union
  {
    unsigned long itemoffset[itemcount];
    item *itemptr[itemcount];
  };
  item items[itemcount];
};

Types

An entry's type determines the specific kind of content contained in its items.

Type	Name	Subsystem	Description
1	Object Model Vertices/Animation	SVTX	contains multiple key frames of animation for an object
2	Object Model Polygons	TGEO	contains polygons used by a Type 1 entry
3	World Geometry	WGEO	contains polygons and vertices for a section of the level
4	Display List	SLST	contains delta encoded display lists, describing the change in z-ordering of polygon primitives at each point of a corresponding camera path
5	Texture Page	TPAG	describes texture/palette data used by polygons
6	Level Data	LDAT	contains a level's initial settings such as Crash's starting location
7	Zone Data	ZDAT	contains a 'zone' - a collection of world models to render, objects to spawn, a camera path, collision octree, and misc attributes
11	GOOL Executable	GOOL	contains a header, compiled GOOL bytecode, const pool, state map, state descriptors, and animation sequence/text/sprite descriptors for an object
12	Audio	ADIO	contains audio data for a sound effect
13	MIDI	MIDI	contains the MIDI sequence(s) for a level's background music and/or a wavebank header (VH)
14	Instruments	INST	describes instruments used to play a MIDI
15	Image Data (Crash 1) Video Collision (Crash 2/3)	IMAG (Crash 1) VCOL (Crash 2/3)	contains image data (i.e. anti-piracy message, SCE screen)1 (Crash 1) contains special collision detection rules? (i.e. digging, chased by boulder) (Crash 2/3)
17	Map Data (Crash 1) Raw Data (Crash 3)	MDAT (Crash 1) RAWD (Crash 3)	contains data describing how a new level should be loaded when selected (Crash 1) contains miscellaneous 3D terrain data (scenery in baron levels, water in levels with water) (Crash 3)
18	Palettes for fading transitions	IPAL	describes the CLUTs used during a fade transition
19	Demo playback	PBAK	contains a pre-recorded sequence of button presses for playback
20	Cutscene Model Vertices/Animation (Crash 1) Speech Audio (Crash 2/3)	CVTX (Crash 1) SDIO (Crash 2/3)	contains vertices for cutscene models (Crash 1) contains speech audio (Crash 2/3)
21	2D Animation/Video (Crash 2/3)	VIDO (Crash 2/3)	contains data for a 2D sprite (i.e. mount texture while digging, warp portal, save icons)

¹ - NSD files in Crash 1 contain these kinds of entries, but without any header.

Entry IDs/EIDs

Like chunks, each entry has also been assigned a unique ID. Unlike CIDs, however, entry IDs (EIDs) have not been precomputed based on index. Each EID encodes a unique 5 character identifier string. Each entry has been assigned an EID that encodes an appropriate identifier.

Encoding scheme

EIDs use the following [32 bit] encoding scheme:

0EEEEEEDDDDDDCCCCCCBBBBBBAAAAAA1

where the [6 bit] fields A, B, C, D, and E, respectively, in that order, are indices of 5 characters in the following conversion table:

Index

0

1

2

3

4

5

6

7

8

9

A

B

C

D

E

F

Char

0

1

2

3

4

5

6

7

8

9

a

b

c

d

e

f

Index

10

11

12

13

14

15

16

17

18

19

1A

1B

1C

1D

1E

1F

Char

g

h

i

j

k

l

m

n

o

p

q

r

s

t

u

v

Index

20

21

22

23

24

25

26

27

28

29

2A

2B

2C

2D

2E

2F

Char

w

x

y

z

A

B

C

D

E

F

G

H

I

J

K

L

Index

30

31

32

33

34

35

36

37

38

39

3A

3B

3C

3D

3E

3F

Char

M

N

O

P

Q

R

S

T

U

V

W

X

Y

Z

_

!

The conversion table above is used by the EID encoding and decoding routines and is located at the following addresses in each of the Crash games:

• Crash 1 - 0x51728

Null EID

The EID with value 0x6396347F, which translates to NONE!, is used frequently throughout the game code. It represents a null EID.