This is a sub-page of Proto:Super Mario World 2: Yoshi's Island.

This version of the editor, the oldest, is found in the SFC\ソースデータ\ヨッシーアイランド\ツール\tool\old_cos ("old course") directory, specifically in the sfc folder. old_cos includes various files pertaining to it, which, together with the ROM, provide a snapshot of the game's development in late 1993, approximately 1.5 years before its June 1995 release.

Editor

Overview#

No header fix is required to boot this level editor. an emulator with SFX-DOS support is required, such as this branch of bsnes-plus. The mouse should be configured to be in Controller Slot 2.

Upon boot, there are two choices: ENMY DATA SET and BG EDIT. The first allows for placement of enemies on the map, and the second choice allows for editing of map tiles.

No one has figured out how to fully utilize the editor yet, as the instructions in the README below suggest that the keyboard's function buttons need to be used in order to load .DAT files, and BSNES Plus doesn't appear to respond to function button input. A possible solution would be to remap the function buttons to other keys by editing the ROM.

Main Menu	ENMY DATA SET	BG EDIT

Instructions#

A set of instructions for using the editor can be found in ツール\tool\old_cos\doc\nii.doc, which is named for programmer Masaru Nii.

Note that "Variable Units" are called "Objects" by western Yoshi's Island modders and documenters, while "Fixed Units" are referred to as "Extended Objects".

Development Snapshot

Comparing the assets of this prototype with files that have accurate last-modified dates, it appears that it dates from late 1993.

Entities#

• The entities DOROB (the bandit) and BUGGY (an unused four-wheeled buggy) are present in the ROM in the form of code, but they don't have graphics assigned to them. This means that ystool.hex is older than the earliest version of the file that assigns graphics to entities, SFC\ソースデータ\ヨッシーアイランド\日本_Ver0\sfc\back_up\ys_ench.asm.BAK0, as the file does have graphical assignments for these entities.

Meter#

Prototype	Final

The meter, which appears on the pause screen in the final game, originally contained a hunger gauge. Code related to this meter can still be found in the source by searching for text such as "はらぺこメーター" (Hunger Meter), "eat power", and "eat counter", and the labels MEATPW and MEATCT. The meter was converted to a charging meter indicating how far an egg would be tossed in a later prototype, and removed from the final game entirely.

Icons for all of Yoshi's possible transformations are also present, including the forms of Mini Yoshi and Mushroom Yoshi, which are also absent from the released version.

In the final game, the windows on the meter are for items.

The level countdown timer was also removed, but code that may be associated with it can be found by searching for the labels TIMER and TIMEUP.

Palettes#

The common sprite palettes look like this in ystool.

Prototype	Final

Palettes: BG1#

Palettes: BG2#

Palettes: BG3#

Palettes: OBJ#

Tilesets#

ツール\tool\old_cos\sfc\ys_init.asm assigns graphical banks to the tilesets that existed at this time.

The following graphical banks, despite existing, are empty:

CHR05
CHR0B
CHR0E
CHR0F
CHR31
CHR32
CHR33
CHR38
CHR39
CHR3A
CHR3B

CHR1D

CHR25A
CHR25B
CHR26A

CHR42
CHR44
CHR48
CHR4C
CHR4D
CHR4E
CHR4F

Tileset: BG1#

BG1CHRBK    EQU $
;            [0]   [1]   [2]
        BYTE    CHR00,CHR01,CHR30  ;[0:地下]
        BYTE    CHR02,CHR03,CHR31  ;[1:草]
        BYTE    CHR08,CHR09,CHR09  ;[2:水中]
        BYTE    CHR0A,CHR0B,CHR0B  ;[3:溶岩]
        BYTE    CHR04,CHR05,CHR32  ;[4:雪]
        BYTE    CHR06,CHR07,CHR07  ;[5:バブル]
        BYTE    CHR0C,CHR0D,CHR31  ;[6:カベ]

BG1 Character Bank

Underground
Grass
Underwater
Lava
Snow
Bubble
Wall

Character Bank 3C:

Tileset: BG2#

BG2CHRBK    EQU $
;            [0]   [1]
        BYTE    CHR1E,CHR1F    ;[0:地下]
        BYTE    CHR18,CHR19    ;[1:草]
        BYTE    CHR12,CHR13    ;[2:水中]
        BYTE    CHR10,CHR11    ;[3:溶岩]
        BYTE    CHR10,CHR11    ;[4:雪]
        BYTE    CHR14,CHR15    ;[5:バブル]
        BYTE    CHR1C,CHR1D    ;[6:カベ]
        BYTE    CHR1A,CHR1B    ;[7:パステル２]

BG2 Character Bank

Underground
Grass
Underwater
Lava
Snow
Bubble
Wall
Pastel 2

Tileset: BG3#

BG3CHRBK    EQU $
;            [0]    [1]
        BYTE    CHR20A,CHR20B      ;[0:雪山]
        BYTE    CHR22A,CHR21A      ;[1:水中（部分スクロール）]
        BYTE    CHR22A,CHR22B      ;[2:ＢＧ３敵（カベ、オバケｅｔｃ）]
        BYTE    CHR23A,CHR22B      ;[3:パステル]
        BYTE    CHR23A,CHR22B      ;[4:   ”   ２]
        BYTE    CHR24A,CHR24A      ;[5:ＢＧ３敵（横回転ポリゴン）]
        BYTE    CHR22A,CHR22B      ;[6:   ”   （ボルト）]
        BYTE    CHR22A,CHR22B      ;[7:竜巻]
        BYTE    CHR22A,CHR22B      ;[8:砂嵐]

BG3 Character Bank

Snowy Mountain
Underwater (Partial Scroll)
BG3 Enemies (Walls, Ghosts, Etc.)
Pastel
  "    2
BG3 Enemies (Horizontal Rotating Polygons)
  "         (Bolt)
Whirlwind
Sandstorm

Tileset: OBJ#

OBJCHRBK    EQU $
;            [0]   [1]
        BYTE    CHR42,CHR43    ;[0:地下]
        BYTE    CHR40,CHR4B    ;[1:草]
        BYTE    CHR40,CHR49    ;[2:水中]
        BYTE    CHR4A,CHR4B    ;[3:溶岩]
        BYTE    CHR40,CHR45    ;[4:雪]
        BYTE    CHR46,CHR47    ;[5:バブル]
        BYTE    CHR4A,CHR4B    ;[6:カベ]
        BYTE    CHR40,CHR4B    ;[7:パステル２]

Object Character Bank

Underground
Grass
Underwater
Lava
Snow
Bubble
Wall
Pastel 2

Character Bank 40:

Character Bank 50:

Character Bank 51:

Tileset: SuperFX#

Offset 0x70000: