Zelda II: The Adventure of Link: Zelda II MMC1 to MMC3 Hack

Zelda II: The Adventure of Link: MMC1 to MMC3 Hack is a modification for the Nintendo Entertainment System that converts the game's memory mapper from MMC1 to MMC3. This enhancement improves performance and compatibility on various emulators. Released by the user named Infidelity, the hack includes comprehensive documentation and code adjustments to facilitate the transition between mappers.

Here is a patch that converts Zelda II's mapper from MMC1 to MMC3. Documentation is included in the zip.

12/1/13
infidelity

Converting Zelda II MMC1 to MMC3

$8000-$9FFF
---------------
$1FF91 = 8E0080 8E00A0 8E00C0 8E00E0
$1FFAD = 8D0080 4A 8D0080 4A 8D0080 4A 8D0080 4A 8D0080 60
The $1FFAD routine is located at the end of every bank.

$A000-$BFFF
---------------
$1FF91 = 8E0080 8E00A0 8E00C0 8E00E0
$1FFC1 = 8D00A0 4A 8D00A0 4A 8D00A0 4A 8D00A0 4A 8D00A0 60
The $1FFC1 routine is located at the end of every bank.

$C000-$DFFF
---------------
$1FF91 = 8E0080 8E00A0 8E00C0 8E00E0

$E000-$FFFF
---------------
$1FF91 = 8E0080 8E00A0 8E00C0 8E00E0
$1FFDC = 8D00E0 4A 8D00E0 4A 8D00E0 4A 8D00E0 4A 8D00E0 60
The $1FFDC routine is located at the end of every bank.

CHANGES
------------
$2000C (Reset Vector) = 4BFF ;update = 4CFF
$1FF5C (MMC3 Setup Routine) = 78 D8 20D7FF EAEAEAEA 8D00A0 8D01A0 8D00C0 8D01C0 8D00E0 A205 8E0080 BDE0FF 8D0180 CA 10F4
$1FFF0 (MMC3 CHR Setup Table) = 000204050607
$1FEC6 (Bankswap Routine)(20B6FE) = 48 0A 48 A906 8D0080 68 8D0180 0901 48 A907 8D0080 68 8D0180 68 60
$1FFAD (Mirroring) = C90F F006 A900 8D00A0 60 A901 8D00A0 60 000000
$1FFDC (Bankswap JMP) = 4CB6FE 00000000000000000000000000000000
$1FFE7 (Part of MMC3 Setup Routine) = A900 8D0080 8D0180 60
$1FFC1 (CHR JSR) = A8 A906 20B6FE 4CB0BE 00000000000000000000
$3F0F = A9008D008098B950BF8D0180A9018D0080B950BF3869018D0180A9028D008098B951BF8D0180A9038D0080B951BF3869008D0180A9048D0080B951BF3869018D0180A9058D0080B951BF3869028D0180600004080C1014181C2024282C3034383C4044484C5054585C6064686C7074787C
$3FAD = C90FF006A9008D00A060A9018D00A06000000060A84CFFBE000000000000000000000000000000
$7F0F = A9008D008098B950BF8D0180A9018D0080B950BF3869018D0180A9028D008098B951BF8D0180A9038D0080B951BF3869008D0180A9048D0080B951BF3869018D0180A9058D0080B951BF3869028D0180600004080C1014181C2024282C3034383C4044484C5054585C6064686C7074787C
$7FAD = C90FF006A9008D00A060A9018D00A06000000060A84CFFBE000000000000000000000000000000
$BF0F = A9008D008098B950BF8D0180A9018D0080B950BF3869018D0180A9028D008098B951BF8D0180A9038D0080B951BF3869008D0180A9048D0080B951BF3869018D0180A9058D0080B951BF3869028D0180600004080C1014181C2024282C3034383C4044484C5054585C6064686C7074787C
$BFAD = C90FF006A9008D00A060A9018D00A06000000060A84CFFBE000000000000000000000000000000
$FF0F = A9008D008098B950BF8D0180A9018D0080B950BF3869018D0180A9028D008098B951BF8D0180A9038D0080B951BF3869008D0180A9048D0080B951BF3869018D0180A9058D0080B951BF3869028D0180600004080C1014181C2024282C3034383C4044484C5054585C6064686C7074787C
$FFAD = C90FF006A9008D00A060A9018D00A06000000060A84CFFBE000000000000000000000000000000
$1289F = A9008D008098B9E0A88D0180A9018D0080B9E0A83869018D0180A9028D008098B9E1A88D0180A9038D0080B9E1A83869008D0180A9048D0080B9E1A83869018D0180A9058D0080B9E1A83869028D0180600004080C1014181C2024282C3034383C4044484C5054585C6064686C7074787C
$13FAD = C90FF006A9008D00A060A9018D00A06000000060A84C8FA8000000000000000000000000000000
$17EFF = A9008D008098B940BF8D0180A9018D0080B940BF3869018D0180A9028D008098B941BF8D0180A9038D0080B941BF3869008D0180A9048D0080B941BF3869018D0180A9058D0080B941BF3869028D0180600004080C1014181C2024282C3034383C4044484C5054585C6064686C7074787C
$17FAD = C90FF006A9008D00A060A9018D00A06000000060A84CEFBE000000000000000000000000000000
$1BF0F = A9008D008098B950BF8D0180A9018D0080B950BF3869018D0180A9028D008098B951BF8D0180A9038D0080B951BF3869008D0180A9048D0080B951BF3869018D0180A9058D0080B951BF3869028D0180600004080C1014181C2024282C3034383C4044484C5054585C6064686C7074787C
$1BFAD = C90FF006A9008D00A060A9018D00A06000000060A84CEFBE000000000000000000000000000000

Not working on Nestopia once you pass the title screen.

Ohhhh yeah, that's right, need to enable WRAM.

$1FF5E = 20D2FF 4C58FF 00000000 8D00A0
$1FFE2 = A980 8D01A0

DONE! Zelda II is now MMC3! :-D
-infidelity

Zelda II - The Adventure of Link (USA).nes - NOINTRO
CRC32: E3C788B0
MD5: 764D36FA8A2450834DA5E8194281035A
SHA-1: 353489A57F24A429572E76BD455BC51D821F7036
SHA-256: AD8C0FBCF092BF84B48E69FD3964EEA4ED91BFE62ABC352943D537979782680C

NES Cores

Time to Beat

Main Story 10h 42m

Main + Extras 11h 0m

Speedrun Avg 8h 47m

Release Date

Dec 1, 2013

11 years ago

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NES Core Required

Zelda II: The Adventure of Link: Zelda II MMC1 to MMC3 Hack Game Wiki

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