Wonder Boy III: Monster Lair (Genesis)/Notes: Difference between revisions

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== Sprites ==
== Sprites ==
For some reason, projectiles sprites are not handled the same way as other (regular) sprites.
===Regular Objects===
Sprite frames are built using 2 tables for each Sprite.
placementTable contains placement and size information. It starts too with an offset (word) to the frame id, then :
* 1 word: number of HW sprites
** 1 word: 00000000 0000WWHH (W=width, H=height)
** 1 signed byte: delta y
** 1 signed byte: delta x
mapTable contains tile information and flip flags. It starts with an offset (word) to the frame id, then, for each HW sprite, the tile attributes in the standard format pccvhnnn nnnnnnnn (p=priority, c=palette, v=vflip, h=hflip, n=tile id).
Note there's no counter in mapTable table, but there are as many tile attributes as the number of HW sprites given in placementTable.
For example, Leo's tables are located at 0x20588 (placementTable) and 0x202c4 (mapTable). Frame 3 (walking frame) is given by the 4th word of both tables (0xa0 for placementTable and 0x4c for mapTable) which leads to 0x20628 and 0x20310.
The data in the placementTable is then:
* 0003: there are 3 HW sprites
* 1st HW sprite:
** 0009: size is (24, 16)
** 00f0: delta y = -16
** 00f4: delta x = -12
* 2nd HW sprite:
** 0008: size is (24, 8)
** 0000: delta y = 0
** 00f4: delta x = -12
* 3rd HW sprite:
** 0008: size is (24,8)
** 0008: delta y = 8
** 00f4: delta x = -12
The tile information in mapTable is:
* 00c9: 1st HW sprite uses tiles id from 0xc9 to 0xce
* 00cf: 2nd HW sprite uses tiles id from 0xcf to 0xd1
* 00d2: 3rd HW sprite uses tiles id from 0xd2 to 0xd4
{| class="wikitable" style="margin:auto"
!Object||Nb of frames||mapTable||placementTable
|-
| Leo
| 20
| 0x202c4
| 0x20588
|-
| Kiwi
| 3
| 0x1f06e
| 0x1fbc4
|-
| Carot
| 2
| 0x1f074
| 0x1fbca
|-
| Tomato
| 3
| 0x1f078
| 0x1fbce
|-
| Sweat
| 2
| 0x1f07e
| 0x1fbd4
|-
| Grape
| 2
| 0x1f092
| 0x1fbfc
|-
| Lemon
| 3
| 0x1f09c
| 0x1fc12
|-
| Beam capsule
| 1
| 0x1f500
| 0x1fbc2
|-
| Missile capsule
| 1
| 0x1f502
| 0x1fbc2
|-
| Wide ring capsule
| 1
| 0x1f504
| 0x1fbc2
|-
| Spiral capsule
| 1,
| 0x1f506
| 0x1fbc2
|-
| Fireball capsule
| 1
| 0x1f4fe
| 0x1fbc2
|-
| Big Fire capsule
| 1
| 0x1f4fc
| 0x1fbc2
|-
| Whelk
| 2
| 0x20e1a
| 0x1fdc2
|-
| Whelk death
| 1
| 0x20e1e
| 0x1fe92
|-
| Snail
| 2
| 0x20e26
| 0x1fdc6
|-
| Snail death
| 1
| 0x20e2a
| 0x1fe94
|-
| Walrus
| 4
| 0x20e38
| 0x1fdca
|-
| Dead Walrus
| 1
| 0x20e40
| 0x1fe96
|-
| Octopus
| 2
| 0x20e56
| 0x1fdd2
|-
| Climbing Snail
| 2
| 0x20e5e
| 0x1fdc6
|-
| Dead Climbing Snail
| 1
| 0x20e62
| 0x1fe92
|-
| Pelican
| 2
| 0x20e6a
| 0x1fdd6
|-
| Explosion
| 2
| 0x21da0
| 0x1feb4
|-
| Moving rock
| 1
| 0x1e89a
| 0x1fc20
|}


== Tilemaps ==
== Tilemaps ==


== Palettes ==
== Palettes ==

Revision as of 17:26, 5 March 2024

Chip tiny.png The following article is a Notes Page for Wonder Boy III: Monster Lair (Genesis).

Gfx format

Gfx data (tiles) are organized by levels (0 to 11). Pointers to each level data are stored from 0x43000 to 0x4302c. Then, for each level, gfx are stored by chunk.

For example, pointer to level 3 chunks is 0x432cc (read at 0x4300c). Then, at 0x432cc, there are pointers to 4 chunks : 0x00000000 (null chunk), 0x432e0, 0x43188, 0x433aa, 0x433aa.

Each chunk is a list of 16 bytes entries, terminated by a 0000 :

  • 1 word: number of tiles - 1
  • 1 long: pointer to actual data
  • 1 word: 1 if gfx uses color indices 0 to 7 (x = 0 in the following), -1 if gfx uses color indices 8 to 15 (x = 1 in the following).

Actual tile data is stored in 3bpp interleaved format:

  • 1 byte: a7 a6 a5 a4 a3 a2 a1 a0
  • 1 byte: b7 b6 b5 b4 b3 b2 b1 b0
  • 1 byte: c7 c6 c5 c4 c3 c2 c1 c0

gives :

  • 1 byte (2 pixels): (x a7 b7 c7) (x a6 b6 c6)
  • 1 byte (2 pixels): (x a5 b5 c5) (x a4 b4 c4)
  • 1 byte (2 pixels): (x a3 b3 c3) (x a2 b2 c2)
  • 1 byte (2 pixels): (x a1 b1 c1) (x a0 b0 c0)
Chunk 0 Chunk 1 Chunk 2 Chunk 3 Chunk 4 Chunk 5
Level 0 0x4303e 0x43060 0x43092
Level 1 0x430d6 0x43188 0x43192 0x43192
Level 2 00000000 0x431e0 0x43188 0x4328a 0x4328a
Level 3 00000000 0x432e0 0x43188 0x433aa 0x433aa
Level 4 00000000 0x433fc 0x4347e 0x43188 0x43188 0x434a8
Level 5 00000000 0x434f6 0x43188 0x43598 0x43598
Level 6 00000000 0x435e6 0x43188 0x43698 0x43698
Level 7 00000000 0x436e6 0x43188 0x43790 0x43790
Level 8 00000000 0x437ee 0x43188 0x438c0 0x438c0
Level 9 00000000 0x43916 0x439a8 0x439b2 0x439b2
Level 10 00000000 0x439fe
Level 11 0x43034

Sprites

For some reason, projectiles sprites are not handled the same way as other (regular) sprites.

Regular Objects

Sprite frames are built using 2 tables for each Sprite.

placementTable contains placement and size information. It starts too with an offset (word) to the frame id, then :

  • 1 word: number of HW sprites
    • 1 word: 00000000 0000WWHH (W=width, H=height)
    • 1 signed byte: delta y
    • 1 signed byte: delta x

mapTable contains tile information and flip flags. It starts with an offset (word) to the frame id, then, for each HW sprite, the tile attributes in the standard format pccvhnnn nnnnnnnn (p=priority, c=palette, v=vflip, h=hflip, n=tile id).

Note there's no counter in mapTable table, but there are as many tile attributes as the number of HW sprites given in placementTable.

For example, Leo's tables are located at 0x20588 (placementTable) and 0x202c4 (mapTable). Frame 3 (walking frame) is given by the 4th word of both tables (0xa0 for placementTable and 0x4c for mapTable) which leads to 0x20628 and 0x20310.

The data in the placementTable is then:

  • 0003: there are 3 HW sprites
  • 1st HW sprite:
    • 0009: size is (24, 16)
    • 00f0: delta y = -16
    • 00f4: delta x = -12
  • 2nd HW sprite:
    • 0008: size is (24, 8)
    • 0000: delta y = 0
    • 00f4: delta x = -12
  • 3rd HW sprite:
    • 0008: size is (24,8)
    • 0008: delta y = 8
    • 00f4: delta x = -12

The tile information in mapTable is:

  • 00c9: 1st HW sprite uses tiles id from 0xc9 to 0xce
  • 00cf: 2nd HW sprite uses tiles id from 0xcf to 0xd1
  • 00d2: 3rd HW sprite uses tiles id from 0xd2 to 0xd4
Object Nb of frames mapTable placementTable
Leo 20 0x202c4 0x20588
Kiwi 3 0x1f06e 0x1fbc4
Carot 2 0x1f074 0x1fbca
Tomato 3 0x1f078 0x1fbce
Sweat 2 0x1f07e 0x1fbd4
Grape 2 0x1f092 0x1fbfc
Lemon 3 0x1f09c 0x1fc12
Beam capsule 1 0x1f500 0x1fbc2
Missile capsule 1 0x1f502 0x1fbc2
Wide ring capsule 1 0x1f504 0x1fbc2
Spiral capsule 1, 0x1f506 0x1fbc2
Fireball capsule 1 0x1f4fe 0x1fbc2
Big Fire capsule 1 0x1f4fc 0x1fbc2
Whelk 2 0x20e1a 0x1fdc2
Whelk death 1 0x20e1e 0x1fe92
Snail 2 0x20e26 0x1fdc6
Snail death 1 0x20e2a 0x1fe94
Walrus 4 0x20e38 0x1fdca
Dead Walrus 1 0x20e40 0x1fe96
Octopus 2 0x20e56 0x1fdd2
Climbing Snail 2 0x20e5e 0x1fdc6
Dead Climbing Snail 1 0x20e62 0x1fe92
Pelican 2 0x20e6a 0x1fdd6
Explosion 2 0x21da0 0x1feb4
Moving rock 1 0x1e89a 0x1fc20

Tilemaps

Palettes