mirror of
https://github.com/notwa/mm
synced 2024-11-05 05:29:02 -08:00
42 lines
1.2 KiB
NASM
42 lines
1.2 KiB
NASM
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[DMARomToRam]: 0x80000BFC
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[vstart]: 0x035D0000
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[start]: 0x80700000
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[size]: 0x10000
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/*
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.org 0x18F30
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; add an entry to the end of dmatable to hold our extra code
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; this actually just crashes the game so don't bother
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; (no debug filename associated with it = bad pointer dereference? maybe?)
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.word @vstart ; virtual start
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.word 0x035E0000 ; virtual end (@vstart + @size)
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.word @vstart ; physical start (should be same as virtual start)
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.word 0 ; physical end (should be 0 for uncompressed)
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*/
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.org 0xB3D9E4 ; 0x800C6844
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; this appears to be the main game loop function
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; we can "make room" for some injected code
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; by taking advantage of it never returning under normal circumstances.
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; we'll cut out pushing RA, S1-S8 stuff on stack.
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; props to CloudMax for coming up with this.
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addiu sp, sp, 0xFC60 ; original code
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; push removed here
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li s0, 0x8011F830 ; original code
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; pushes removed here
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; 9 instructions to work with?
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; dma args are backwards compared to MM?
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li a1, @start
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li a2, @size
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jal @DMARomToRam
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li a0, @vstart
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lui a0 0x8014 ; original code
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cl a1
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cl a2
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nop
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nop
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nop
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nop
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nop
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