73 lines
2.6 KiB
NASM
73 lines
2.6 KiB
NASM
;--------------------------------------------------------------------------------
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; $7F5010 - Scratch Space (Callee Preserved)
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;--------------------------------------------------------------------------------
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!GOAL_COUNTER = "$7EF418"
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!GOAL_DRAW_ADDRESS = "$7EC72A"
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;--------------------------------------------------------------------------------
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; DrawGoalIndicator moved to newhud.asm
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;--------------------------------------------------------------------------------
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GoalItemGanonCheck:
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LDA $0E20, X : CMP.b #$D6 : BNE .success ; skip if not ganon
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JSL.l CheckGanonVulnerability
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BCS .success
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.fail
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LDA $0D80, X : CMP.b #17 : !BLT .success ; decmial 17 because Acmlm's chart is decimal
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LDA.b #$00
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RTL
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.success
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LDA $44 : CMP.b #$80 ; thing we wrote over
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RTL
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;--------------------------------------------------------------------------------
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;Carry clear = ganon invincible
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;Carry set = ganon vulnerable
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CheckGanonVulnerability:
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LDA InvincibleGanon : BEQ .success
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;#$00 = Off
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+ : CMP #$01 : BEQ .fail
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;#$01 = On
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+ : CMP #$02 : BNE +
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;#$02 = Require All Dungeons
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LDA $7EF374 : AND.b #$07 : CMP #$07 : BNE .fail ; require all pendants
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LDA $7EF37A : AND.b #$7F : CMP #$7F : BNE .fail ; require all crystals
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LDA $7EF3C5 : CMP.b #$03 : !BLT .fail ; require post-aga world state
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LDA $7EF2DB : AND.b #$20 : CMP #$20 : BNE .fail ; require aga2 defeated (pyramid hole open)
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BRA .success
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+ : CMP #$04 : BNE +
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;#$04 = Require All Crystals
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LDA $7EF37A : AND.b #$7F : CMP #$7F : BNE .fail ; require all crystals
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BRA .success
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+ : CMP #$03 : BNE +
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;#$03 = Require All Crystals and Aga 2
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LDA $7EF37A : AND.b #$7F : CMP #$7F : BNE .fail ; require all crystals
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LDA $7EF2DB : AND.b #$20 : CMP #$20 : BNE .fail ; require aga2 defeated (pyramid hole open)
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BRA .success
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+ : CMP #$05 : BNE +
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;#$05 = Require 100 Goal Items
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LDA.l !GOAL_COUNTER : CMP.b #100 : !BLT .fail ; require 100 goal items
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BRA .success
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+ : CMP #$06 : BNE +
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;#$06 = Require "NumberOfCrystalsRequired" Crystals
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JSR CheckEnoughCrystals : BCC .fail
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BRA .success
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+
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.fail : CLC : RTL
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.success : SEC : RTL
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;--------------------------------------------------------------------------------
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GetRequriedCrystals:
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BEQ + : JSL.l BreakTowerSeal_ExecuteSparkles : + ; thing we wrote over
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LDA.l NumberOfCrystalsRequired : DEC #2 : TAX
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RTL
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;--------------------------------------------------------------------------------
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CheckEnoughCrystals:
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LDA InvincibleGanon : CMP #$06 : BNE .normal
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.other
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PHX : PHY
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LDA $7EF37A : JSL CountBits ; the comparison is against 1 less
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PLY : PLX
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CMP.l NumberOfCrystalsRequired
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RTL
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.normal
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LDA $7EF37A : AND.b #$7F : CMP.b #$7F ; thing we wrote over
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RTL |