109 lines
3.0 KiB
NASM
109 lines
3.0 KiB
NASM
;================================================================================
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; Hard & Masochist Mode
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;================================================================================
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CalculateSpikeFloorDamage:
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REP #$20 ; set 16-bit accumulator
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LDA $A0 ; these are all decimal because i got them that way
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CMP.w #279
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SEP #$20 ; set 8-bit accumulator
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BNE +
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LDA.l ByrnaCaveSpikeDamage
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STA $0373
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RTL
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+
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LDA $D055, Y
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STA $0373
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RTL
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;--------------------------------------------------------------------------------
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CalculateByrnaUsage:
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LDA $1B : BEQ ++
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REP #$20 ; set 16-bit accumulator
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LDA $A0 ; these are all decimal because i got them that way
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CMP.w #95 : BEQ + ; Ice Palace Spike Room
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CMP.w #172 : BEQ + ; Blind Boss Room
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CMP.w #179 : BEQ + ; Room in Misery Mire
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CMP.w #213 : BEQ + ; Laser Bridge
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CMP.w #279 : BEQ + ; Spike Cave
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SEP #$20 ; set 8-bit accumulator
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BRA ++
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+
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SEP #$20 ; set 8-bit accumulator
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PHX : TYX
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LDA.l HardModeExclusionCaneOfByrnaUsage, X : STA $00
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PLX
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++
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LDA $7EF36E ; thing we wrote over
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RTL
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;--------------------------------------------------------------------------------
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CalculateCapeUsage:
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LDA $1B : BEQ ++
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REP #$20 ; set 16-bit accumulator
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LDA $A0 ; these are all decimal because i got them that way
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CMP.w #95 : BEQ + ; Ice Palace Spike Room
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CMP.w #179 : BEQ + ; Room in Misery Mire
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CMP.w #213 : BEQ + ; Laser Bridge
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CMP.w #279 : BEQ + ; Spike Cave
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SEP #$20 ; set 8-bit accumulator
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BRA ++
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+
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SEP #$20 ; set 8-bit accumulator
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PHX : TYX
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LDA.l HardModeExclusionCapeUsage, X : STA $4C ; set cape decrement timer
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PLX
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++
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LDA $7EF36E ; thing we wrote over
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RTL
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;--------------------------------------------------------------------------------
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ActivateInvulnerabilityOrDont:
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LDA $1B : BEQ .nowhere_special
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REP #$20 ; set 16-bit accumulator
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LDA $A0 ; these are all decimal because i got them that way
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CMP.w #95 : BEQ .somewhere_cool ; Ice Palace Spike Room
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CMP.w #179 : BEQ .somewhere_cool ; Room in Misery Mire
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CMP.w #213 : BEQ .somewhere_cool ; Laser Bridge
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CMP.w #279 : BEQ .somewhere_cool ; Spike Cave
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SEP #$20 ; set 8-bit accumulator
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BRA .nowhere_special
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.somewhere_cool
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SEP #$20 ; set 8-bit accumulator
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LDA.b #$01 : STA $037B : RTL
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.nowhere_special
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LDA.l ByrnaInvulnerability : STA $037B
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RTL
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;--------------------------------------------------------------------------------
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CheckStunItemAction:
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LDA.b #$40 : STA $0DF0, X
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LDA #$05 : JSR SearchAncilla : BEQ + ; boomerang
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LDA.l StunItemAction : AND #$01 : CMP #$01 : BNE .no_stun
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BRA .normal
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+
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LDA #$1F : JSR SearchAncilla : BEQ + ; hookshot
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LDA.l StunItemAction : AND #$02 : CMP #$02 : BNE .no_stun
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BRA .normal
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+
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LDA $0CF2 : BEQ .no_stun
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.normal
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LDA.b #$0B : STA $0DD0, X ; stun enemy
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.no_stun
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RTL
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;--------------------------------------------------------------------------------
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;Argument : A = id we want to find return 00 if none found, 01 if found
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SearchAncilla:
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{
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STA $05
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PHX
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LDX #$00
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.loop
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LDA $0C4A, X
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INX : CPX #$0A : BEQ .notFound
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CMP $05 : BNE .loop
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LDA #$01
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BRA .return
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.notFound
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LDA #$00
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.return
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PLX
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RTS
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}
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