TASK3 ASM(U)

arch n64.cpu
endian msb
//output "", create

include "LIB\N64.inc"
include "LIB\macros.inc"

origin 0x0
insert "Super Mario 64 (U) [!].z64"

// Title Screen
origin 0xF1F80
Asciiz("TASK3")
origin 0xF1F88
Asciiz("   US")

// All Stars Yellow
origin 0xAD548
beq r0, r0, 0xAD56C // 812F2548 1000
origin 0x65FC4
beq r0, r0, 0x65FD4 // 812AAFC4 1000

//Always Have Special Triple Jump
//origin 0x26828
//nop // 8126B828 2400

//no pipe
origin 0x21A5A0 //810EB920 1D00
dh 0x1D00

//no wind
origin 0x10824
dh 0x1000 //81255824 1000
origin 0x25650
dh 0x1000 //8126A650 1000
origin 0x21AC70
dh 0x1D00 //810EBFF0 1D00

//no big balls
origin 0x21D858
dh 0x1D00 //810EEBD8 1D00

//no water
origin 0x8C0A0
dh 0x2419 //812D10A0 2419
origin 0xFE94C
dh 0x2419 //81381BCC 2419

// THIposition
origin 0x42CA3C
dh 0x1CDE //811929F4 1CDE
dh 0xFE00 //811929F6 FE00
dh 0xE76E //811929F8 E76E

// change star from 3goombas
origin 0x42C767
db 0x7A //
origin 0x42C775
db 0x00 //
origin 0x42C77A
dh 0x3E3C //

// change 3goombas(star) position
origin 0x42C768
dh 0xED00 //81192B60 ED00
dh 0xF4DA //81192B62 F4DA
dh 0x1933 //81192B64 1933

// No Music
origin 0xD83F4
dh 0x2405
origin 0xD83F6
dh 0x0000

// Level Reset
origin 0x57E9C
nop // 8129CE9C 2400
origin 0x57EC0
nop // 8129CEC0 2400

// Prevent timer reset at start of Koopa race
origin 0x463C
nop // 8124963C 2400

// Prevent timer stop at end of Koopa race
origin 0x4660
nop // 81249660 2400

// Manual Timer
origin 0x4688
sb k1, 0xB25E (at) // 81249688 A03B
origin 0x4690
nop // 81249690 2400
//origin 0x6194
//ori t2, t1, 0x0040 // 8024B197 0040
origin 0x8C7C
sb r0, 0x00EE (t5) // 8124DC7C A1A0 & 8124DC7E 00EE

//stage music modifer
origin 0x5024
beq r0, r0, 0x5044 // 8124A024 1000

// Star-Grab Timer
origin 0x8C70
base 0x8024DC70
lb at, 0x00 (t5)
ori t6, r0, 0x7F  //8124DC70 81A1 && 8124DC74 340E && 8124DC76 007F
beq r0, at, 0x8024DC7C
origin 0x8C84
sh t6, 0xFA (t5) //8124DC84 A5AE && 8124DC86 00FA

// Centisecond
origin 0x9E9C8
addiu at, r0, 0x0A
origin 0x9EA00
mult t9, at
mflo t1
addiu at, r0, 0x03
div t1, at
mflo t2
sh t2, 0x24 (sp)
origin 0x9EA60
addiu a2, a2, 0x83B4

// Lag Frame Counter
origin 0xE29AC // 803279AC
jal 0x8027F4C8 // ROM 0x3A4C8
origin 0x3BE0 // 80248BE0 Hijack BUF display
lui t8, 0x8034
lw t7, 0xB290 (t8) // Read current value
lw t6, 0xB294 (t8) // Read previous value
sw t7, 0xB294 (t8) // Copy current value to previous value
subu t5, t7, t6 // Calculate difference between previous and current
lw a3, 0xB298 (t8) // Load sum
addu a3, a3, t5 // Expect 2 frames difference
addiu a3, a3, 0xFFFE
origin 0x3C14 // 80248C14
sw a3, 0xB298 (t8) // Save sum
origin 0x3A4C8 // RAM 0x8027F4C8
lui t2,0x8034
lw t3,0xB290(t2)
addiu t3, t3, 0x0001
sw t3, 0xB290 (t2) // Add 1 to the video interrupt counter
j 0x80327B98 // Return to normal exception handling path
nop

// Lag as Lives
origin 0x3C10 // 80248C10
nop
origin 0x9E77C // 802E377C
lw a3, 0xB298 (a3)

// Hijack Resource Meter
origin 0x2D2C
nop
origin 0x2D34
jal 0x8027E65C // ROM 0x3965C
origin 0x3965C // RAM 0x8027E65C

// Constant Writes
lui t0, 0x8020
lui t1, 0x8033
lui t2, 0x8034

// 120 Star File (Slot 3)
addiu v0, r0, 0x1F10
sh v0, 0x77E8 (t0) // 812077E8 1F10
addiu v0, r0, 0xFFCB
sh v0, 0x77EA (t0) // 812077EA FFCB
addiu v0, r0, 0x7FFF
sh v0, 0x77EC (t0) // 812077EC 7FFF
sh v0, 0x77EE (t0) // 812077EE 7FFF
addiu v0, r0, 0x7FFF
sh v0, 0x77F0 (t0) // 802077F0 007F & 802077F1 007F
sh v0, 0x77F2 (t0) // 802077F2 007F & 802077F3 007F
sh v0, 0x77F4 (t0) // 802077F4 007F & 802077F5 007F
sh v0, 0x77F6 (t0) // 802077F6 007F & 802077F7 007F
sh v0, 0x77F8 (t0) // 802077F8 007F & 802077F9 007F
sb v0, 0x77FA (t0) // 802077FA 007F
addiu v0, r0, 0x0081
sb v0, 0x77FB (t0) // 802077FB 0081
addiu v0, r0, 0x0101
sh v0, 0x77FC (t0) // 812077FC 0101
addiu v0, r0, 0x0301
sh v0, 0x77FE (t0) // 812077FE 0301
addiu v0, r0, 0x0101
sh v0, 0x7800 (t0) // 81207800 0101
addiu v0, r0, 0x0181
sh v0, 0x7802 (t0) // 81207802 0181

// Remove Time Text
sh r0, 0x83A8 (t2) // 813383A8 0000

// Conditionals
lui t0, 0x8020
lui t1, 0x8028
lui t2, 0x8033
lui t3, 0x8034
lui t4, 0x8036

// Automatically Reset Timer at Star Select
lb at, 0xB239 (t3)
addiu v0, r0, 0x0004
bne at, v0, Skip01 // D033B239 0004
nop
sh r0, 0xB26C (t3) // 8133B26C 0000
Skip01:

// Level Reset(L)
lb at, 0xAFA1 (t3)
addiu v0, r0, 0x0020
bne at, v0, Skip02 // D033AFA1 0020
nop
addiu v0, r0, 0x0008
sb v0, 0xB21E (t3) // 8033B21E 0008
sh r0, 0xB262 (t3) // 8133B262 0000
sh r0, 0xB218 (t3) // 8133B218 0000
addiu v0, r0, 0x0002
sb v0, 0xB248 (t3) // 8033B248 0002
addiu v0, r0, 0x0005
sh v0, 0x1414 (t4) // 81361414 0005
Skip02:

// Level Reset Camera Fix
lb at, 0xB249 (t3)
addiu v0, r0, 0x001D
beq at, v0, Skip03 // D233B249 001D
nop
addiu v0, r0, 0x0001
sh v0, 0x72DA (t1) // 812872DA 0001
Skip03:
  bne at, v0, Skip04 // D033B249 001D
  nop
  sh r0, 0x72DA (t1) // 812872DA 0000
Skip04:

// Manual Timer reset on L
lb at, 0xAFA1 (t3)
addiu v0, r0, 0x0020
bne at, v0, Skip05 // D033AFA1 0020
nop
sh r0, 0xB26C (t3) // 8133B26C 0000
Skip05:

// Star Select(L+R)
lb at, 0xAFA1 (t3)
addiu v0, r0, 0x0030
bne at, v0, Skip07 // D033AFA1 0030
nop
addiu v0, r0, 0x0008
sb v0, 0xB21E (t3) // 8033B21E 0008
addiu v0, r0, 0x0004
sh v0, 0xB238 (t3) // 8133B238 0004
addiu v0, r0, 0x0002
sb v0, 0xB248 (t3) // 8033B248 0002
sh r0, 0xB26C (t3) // 8133B26C 0000
// sw r0, 0xFED4 (t2) // 8132FED4 0000 & 8132FED6 0000
lb at, 0xB249 (t3)
addiu v0, r0, 0x000D
bne at, v0, Not_THI // D033B249 000D
nop
THI:
  addiu v0, r0, 0x010A
  sh v0, 0xB24A (t3) // 8133B24A 020A
  beq r0, r0, Skip07
  nop
Not_THI:
  addiu v0, r0, 0x010A
  sh v0, 0xB24A (t3) // 8133B24A 010A
Skip07:

// Lag Frame Counter
lb at, 0xAFA1 (t3)
addiu v0, r0, 0x0020
bne at, v0, Skip08 // D033AFA1 0020
nop
sw r0, 0xB298 (t3) // 8133B298 0000 & 8133B29A 0000
Skip08:

// Lag Frame Counter Reset
lb at, 0xB239 (t3)
addiu v0, r0, 0x0004
bne at, v0, Skip14 // D033B239 0004
nop
sw r0, 0xB298 (t3) // 8133B298 0000 & 8133B29A 0000
Skip14:

// Return
jr ra
nop