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$008000
|
85 bytes |
ASM |
This is the starting address for YI. This takes care of basic initialization such as disabling IRQ, HDMA, DMA, clearing the SPC ports, enabling F-blank, disabling emulation mode, disabling decimal mode, initializing the direct page, and setting up the stack, among other things. |
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$0080F8
|
56 bytes |
Debug |
Routine used for frame advance debug code. Enabled by tweak at $0080F7. See details for controls. |
Controls
|
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$00816A
|
207 bytes |
Pointer |
Gamemode subroutine table, 3 bytes per entry. |
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$008275
|
2 bytes |
Empty |
Empty (filled with FF) |
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$008288
|
35 bytes |
Subroutine |
JSL to copy a block of memory into RAM.
Input:
A: Size of the block
$20-$22: RAM Destination
$23-$25: DMA Source |
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$0082D0
|
19 bytes |
ASM |
Copies SPC program |
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$0083CD
|
34 bytes |
Subroutine |
Subroutine that handles fading effects. |
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$00841F
|
140 bytes |
Subroutine |
Music uploader subroutine |
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$00851C
|
16 bytes |
Music |
Item-Denial table for each music track: $01-$7F: disable items, $00 and $80-$FF: enable items |
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$008543
|
142 bytes |
ASM |
Music uploader controller |
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$0085D2
|
10 bytes |
Subroutine |
Subroutine that plays sound effects |
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$00B039
|
768 bytes |
Graphics |
List of sprite GFX file numbers (1 byte each) that make up each sprite set (6 files per set). |
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$00BFF6
|
10 bytes |
Empty |
Empty (filled with FF) |
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$00DE44
|
35 bytes |
Super FX |
Calls a Super FX routine, Register X = Bank, Register A = Address |
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$00E101
|
37 bytes |
Subroutine |
Kill Yoshi Subroutine. This one kills Yoshi as he was killed by lava. Note that this routine is copied into RAM so jump to $7EE101 if GSU is active.
$00E10F is Yoshi's initial Y speed in the death animation.
$00E0FD (4 bytes) is the X speed Yoshi has got in the death animation, for facing right and left. |
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$00E552
|
1024 bytes |
Table |
Lookup table for function y = 1/x, copied into $702200-$7025FF (Used by GSU to divide. It does not have a hardware divide so this lookup table is used instead) |
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$00F7A9
|
2039 bytes |
Empty |
Empty (filled with FF) |
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$00FFA0
|
5 bytes |
Misc. |
ROM build date and time. On a U 1.0 ROM, it's 11:19 am on July 31st, 1995 |
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$00FFA5
|
11 bytes |
Empty |
Empty (filled with FF) |
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$00FFB0
|
2 bytes |
Misc. |
ROM registration: Maker code (ASCII): "01" (Nintendo) |
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$00FFB2
|
4 bytes |
Misc. |
ROM registration: Game code (ASCII): "YI " |
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$00FFB6
|
6 bytes |
Misc. |
ROM registration: reserved (all $00) |
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$00FFBC
|
1 byte |
Misc. |
ROM registration: Expansion FLASH Size ($00 = none) |
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$00FFBD
|
1 byte |
Misc. |
ROM registration: Super FX RAM size ($05 = 32KB) |
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$00FFBE
|
1 byte |
Misc. |
ROM registration: Special version ($00 = not special) |
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$00FFBF
|
1 byte |
Misc. |
ROM registration: Chipset sub-type ($00) |
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$00FFC0
|
21 bytes |
Misc. |
ROM header: Cartridge title (ASCII): "YOSHI'S ISLAND " |
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$00FFD5
|
1 byte |
Misc. |
ROM header: ROM Makeup ($20 = LoROM) |
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$00FFD6
|
1 byte |
Misc. |
ROM header: Chipset ($15 = ROM + SuperFX + RAM + SRAM) |
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$00FFD7
|
1 byte |
Misc. |
ROM header: ROM size ($0B = 2MB) |
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$00FFD8
|
1 byte |
Misc. |
ROM header: SRAM size |
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$00FFD9
|
1 byte |
Misc. |
ROM header: Region ($01 = NTSC) |
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$00FFDA
|
1 byte |
Misc. |
ROM header: $33 (fixed value) |
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$00FFDB
|
1 byte |
Misc. |
ROM header: Version ($00 = 1.0) |
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$00FFDC
|
2 bytes |
Misc. |
ROM header: Checksum complement (inverted bits) |
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$00FFDE
|
2 bytes |
Misc. |
ROM header: Checksum |
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$00FFE0
|
4 bytes |
Misc. |
2 unused native vectors |
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$00FFE4
|
2 bytes |
Misc. |
Native COP vector (unused) |
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$00FFE6
|
2 bytes |
Misc. |
Native BRK vector (unused) |
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$00FFE8
|
2 bytes |
Misc. |
Native ABORT vector (unused) |
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$00FFEA
|
2 bytes |
Misc. |
Native NMI vector (vblank) |
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$00FFEC
|
2 bytes |
Misc. |
Native RESET vector (unused) |
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$00FFEE
|
2 bytes |
Misc. |
Native IRQ vector |
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$00FFF0
|
4 bytes |
Misc. |
2 unused emulation vectors |
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$00FFF4
|
2 bytes |
Misc. |
Emulation COP vector (unused) |
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$00FFF6
|
2 bytes |
Misc. |
Emulation BRK vector (unused) |
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$00FFF8
|
2 bytes |
Misc. |
Emulation ABORT vector (unused) |
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$00FFFA
|
2 bytes |
Misc. |
Emulation NMI vector (unused) |
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$00FFFC
|
2 bytes |
Misc. |
Emulation RESET vector |
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$00FFFE
|
2 bytes |
Misc. |
Emulation IRQ vector (unused) |
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