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SMW Memory Map

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Hijack Address Length Type Description Details
$008023 4 bytes Jump (JML/JSL) Modified by ZSNES incompatibility notice. Jumps to the main code.
$008027 4 bytes Code Hijacked by the Free up RAM $7F:8000 patch by DiscoTheBat and Ersanio.
Inserts a SEP #$30, to set the processor status to 8-bit A and X/Y, and a BRA to skip the code that uploads the OAM clear routine to $7F8000.
The BRA jumps to $008052 if !UberASMTool = 0, and to $00804E if !UberASMTool = 1.
$00804D 1 byte Opcode Not modified, however is used by Lunar Magic as an RTL for calling routines that end in RTS in bank 0 with a JSL via stack magic. So don't modify it.
$00804E 4 bytes Jump (JML/JSL) Hijacked by UberASMTool.
JML, jumps to the routine that initializes the freeram used by the tool and executes the global init code.
$008052 3 bytes Jump (JMP/JSR) Hijacked by AddmusicK.
Inserts a JSR to the custom UploadSPCEngine routine inserted in the $008079 area, replacing the original JSR.
$00805E 3 bytes Hex Edit Modified by AddmusicK.
Inserts 3 NOPs to skip a JSR to a routine that uploads samples to the SPC700.
$00806B 4 bytes Jump (JML/JSL) Hijacked by UberASMTool.
JML, jumps to the routine that executes global main code.
$008070 4 bytes Jump (JML/JSL) Modified by 16-bit frame counter. Jump to code that increases both $13 and 16-bit frame counters.
$008072 3 bytes Jump (JMP/JSR) Modified by the CPU Usage Meter patch. Jumps to the main code of the patch in a free area at $00FF9C.
$008072 3 bytes Jump (JMP/JSR) Hijacked by the Lunar Magic's "VRAM Patch" Optimization patch, by Kevin.

JSR, replaces the main game loop call with a call to a custom routine in bank 0 freespace, which allows the stripe image modifications to take place outside of NMI after the game loop has run.
$008075 4 bytes Jump (JML/JSL) Hijacked by AddmusicK.
JML to the main AMK routine inserted in the $0E8000 area.
$008079 209 bytes Code Modified by AddmusicK.
Replaces the original SPC data upload routine with a custom one.
$008176 6 bytes Jump (JML/JSL) Hijacked by UberASMTool.
JML : NOP #2, jumps to the routine that executes all possible NMI codes inserted in the tool (global, level, gamemode, overworld). For efficiency, certain parts of the code are only inserted if needed.
$008179 49 bytes Hex Edit Modified by AddmusicK.
BRA + : NOP #47 : +, skips over original NMI audio code that's already handled in AMK's routines. This is inserted in case neither $008179 == $5C nor $008176 == $5C.
$00817C 46 bytes Hex Edit Modified by AddmusicK.
BRA + : NOP #44 : +, skips over original NMI audio code that's already handled in AMK's routines. This is inserted in case $008176 is $5C (JML), to make it compatible with a LevelNMI (UberASM) hijack.
$00817D 45 bytes Hex Edit Modified by AddmusicK.
BRA + : NOP #43 : +, skips over original NMI audio code that's already handled in AMK's routines. This is inserted in case $008179 is $5C (JML), to make it compatible with PowerTool.
$00818F 18 bytes Code Hijacked by the No Title SFX patch.
A piece of code that mutes every SFX in the title screen.
$0081AA 8 bytes Jump (JML/JSL) Modified by Ice Man's 'HDMA v3.5' patch. Hijacks NMI and calls the main routine. [JSL : BRA : NOP #2]
$0081AA 4 bytes Jump (JML/JSL) Hijacked by the Retry System (+ Multiple Checkpoints) v2.06b patch by worldpeace and LX5.
JML, it jumps to the code that turns off HDMA during level transitions (including room respawning).
$0081AA 5 bytes Jump (JML/JSL) Hijacked by the HDMA Bugfixes patch, by Ice Man.

JML : NOP, clears the HDMA enable mirror on specific game modes.
$0081C6 5 bytes Jump (JML/JSL) Modified by the Easy Mode 7 Patch by ExE Boss, HuFlungDu, and mathie.

JML : NOP, makes SMW use the Mode 7 mirrors in any Mode 7 level instead of just boss levels.
$0081D5 4 bytes Jump (JML/JSL) Modified by "Mode 7 Game Over Screen" patch. Check for game over game mode and update mode 7 image.
$0081E2 4 bytes Jump (JML/JSL) Modified by Lunar Magic.
$0081EC 4 bytes Jump (JML/JSL) Hijacked by multiple patches.
Overworld Counters hijacks this to upload the various counters during NMI.
Overworld Border Plus hijacks this to upload the border tiles during NMI.
$0081F4 3 bytes Hex Edit Modified by "Remove Status Bar" patch. Remove routine call that draws status bar during normal levels.
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