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https://github.com/notwa/mm
synced 2024-06-29 05:17:12 -07:00
87 lines
2.2 KiB
NASM
87 lines
2.2 KiB
NASM
; oot debug rom
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; mess with display lists
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; game note: #2 jumps to #3 which jumps to #1 which calls pieces of #2
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; what a mess
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[ctxt]: 0x80212020
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[dlists]: 0x80168930
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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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[original]: 0x800C6AC4
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[inject_from]: 0xB3D458 ; 0x800C62B8
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[inject_to]: 0x80700000
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.org @inject_from
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jal @inject_to
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.org @inject_to
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sw ra, -4(sp)
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sw a0, 0(sp)
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sw a1, 4(sp)
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sw a2, 8(sp)
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sw a3, 12(sp)
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bal start
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subi sp, sp, 24
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lw ra, 20(sp)
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lw a0, 24(sp)
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lw a1, 28(sp)
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lw a2, 32(sp)
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lw a3, 36(sp)
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j @original
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addi sp, sp, 24
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.include "widescreen-either.asm"
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; set up screen dimensions to render widescreen.
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[res2_L]: 0
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[res2_T]: 30
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[res2_R]: 320
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[res2_B]: 210
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.org 0xB21D30 ; 0x800AAB90
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li t3, @res2_B ; 240B00D2
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li t4, @res2_T ; 240C001E
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.org 0xB21D48 ; 0x800AABA8
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li t1, @res2_R ; 24090140
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li t2, @res2_L ; 240A0000
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