142 lines
4.6 KiB
NASM
142 lines
4.6 KiB
NASM
;--------------------------------------------------------------------------------
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!ANCILLA_DAMAGE = "$06EC84"
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; start with X = sprite index, A = ancilla type index
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;--------------------------------------------------------------------------------
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Ganon_CheckAncillaVulnerability:
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PHA
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LDA $0EE0, X : BNE .not_vulnerable_pla
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PLA
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PHX : PHA
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LDA.l GanonVulnerabilityItem
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TAX : PLA
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CMP.l Ganon_CheckByAncilla, X : BNE +
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PLX : BRA .vulnerable
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+
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PLX : PHA
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LDA.l GanonVulnerabilityItem
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CMP #$01 : BEQ .silver_arrows
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CMP #$11 : BEQ .somaria
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BRA .not_vulnerable_pla
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.silver_arrows
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PLA : CMP #$09 : BNE .not_vulnerable
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LDA $7EF340 : CMP.b #$03 : !BGE +
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LDA #$09 : BRA .not_vulnerable
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+
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BRA .vulnerable
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.hammer
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BRA .not_vulnerable_pla ; NYI
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.golden_bee
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BRA .not_vulnerable_pla ; NYI
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.somaria
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PLA : CMP #$01 : BEQ .vulnerable
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CMP #$2C : BEQ .vulnerable
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BRA .vulnerable
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.vulnerable
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PHX
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LDA.l GanonVulnerabilityItem
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TAX
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LDA.l Ganon_IFrameDuration, X
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PLX
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STA $0EE0, X ; give the poor pig some iframes
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LDA #$20 : STA $0F10, X
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LDA #$09
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RTL
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.not_vulnerable_pla
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PLA
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.not_vulnerable
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PHX : TAX
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LDA.l !ANCILLA_DAMAGE, X
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PLX
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RTL
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; end with X = sprite index, A = damage class
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;--------------------------------------------------------------------------------
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!ANCILLA_CHECK_SPRITE_DAMAGE_PRESET_CLASS = "$06ECE6"
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;--------------------------------------------------------------------------------
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Ganon_CheckPowderVulnerability: ; we know it's powder
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LDA.l GanonVulnerabilityItem : CMP #$05 : BNE .normal ; ganon not vulnerable to powder
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LDA $0E20, X : CMP #$D7 : BNE .normal ; not stunned ganon
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LDA $0EE0, X : BNE .normal ; ganon has iframes
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LDA.l Ganon_IFrameDuration+$05
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STA $0EE0, X ; give the poor pig some iframes
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LDA #$20 : STA $0F10, X
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LDA #$09
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BRA .done
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.normal
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LDA.b #$0A
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.done
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JSL.l !ANCILLA_CHECK_SPRITE_DAMAGE_PRESET_CLASS
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RTL
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;--------------------------------------------------------------------------------
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Ganon_CheckBeeVulnerability: ; we know it's a bee
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; X is bee sprite index
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; Y is target sprite index
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LDA.l GanonVulnerabilityItem : CMP #$10 : BNE .normal ; ganon not vulnerable to bee
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LDA $0E20, Y : CMP #$D7 : BNE .normal ; not stunned ganon
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LDA $0EE0, Y : BNE .normal ; ganon has iframes
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LDA.l Ganon_IFrameDuration+$10
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STA $0EE0, Y ; give the poor pig some iframes
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LDA #$20 : STA $0F10, Y
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LDA #$09
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BRA .done
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.normal
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LDA.l SpecialWeapons : CMP.b #$06 : BNE .regular_bee
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LDA.w $0ED0, X
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BRA .done
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.regular_bee
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LDA.b #$01
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.done
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TYX
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JSL.l !ANCILLA_CHECK_SPRITE_DAMAGE_PRESET_CLASS
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RTL
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;--------------------------------------------------------------------------------
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Ganon_CheckInvincible:
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LDA $04C5 : CMP.b #$02 : BEQ .not_transparent
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LDA $0E20, X : CMP #$D7 : BNE .transparent ; non-stunned ganon
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LDA $0301 : AND.b #$0A : BEQ .transparent ; normal behavior if not hammer
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LDA.l GanonVulnerabilityItem : CMP #$0C : BNE .transparent ; ganon not vulnerable to hammer
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.not_transparent
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LDA #$00 : RTL
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.transparent
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LDA #$01 : RTL
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; return non-zero A if ganon should be invincible
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;--------------------------------------------------------------------------------
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Ganon_CheckHammerVulnerability: ; we know it's hammer
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LDA.l GanonVulnerabilityItem : CMP #$0C : BNE .normal ; ganon not vulnerable to hammer
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LDA $0E20, X : CMP #$D7 : BNE .normal ; not stunned ganon
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LDA $0EE0, X : BNE .normal ; ganon has iframes
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LDA.l Ganon_IFrameDuration+$0C
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STA $0EE0, X ; give the poor pig some iframes
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LDA #$20 : STA $0F10, X
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LDA #$09 : STA $0CF2 ; set damage class to silver
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SEC : RTL
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.normal
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CLC : RTL
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; return carry set bit if stunned Ganon and Ganon vulnerable to hammer
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;--------------------------------------------------------------------------------
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CheckBeeBoss:
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; Y is sprite index
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LDA.l SpecialWeapons : CMP #$06 : BNE .not_bee_mode
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LDA #$00 : RTL
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.not_bee_mode
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LDA.l GanonVulnerabilityItem : CMP #$10 : BNE .normal ; ganon not vulnerable to bee
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LDA $0E20, Y : CMP #$D7 : BNE .normal ; not stunned ganon
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LDA #$00 : RTL
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.normal
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LDA $0B6B, Y : AND.b #$02
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RTL
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; return non-zero A if entity is a boss (and bee should not attack)
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;--------------------------------------------------------------------------------
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Ganon_CheckByAncilla:
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db #$00 ; default behavior--we shouldn't be checking the table here anyway
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db #$00, #$05, #$1F, #$07, #$00
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db #$02, #$0B, #$19, #$18, #$1C
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db #$00, #$00, #$00, #$00, #$00
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db #$00, #$00, #$31, #$00, #$00
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Ganon_IFrameDuration:
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db #$00 ; default behavior--we shouldn't be here anyway
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db #$00, #$00, #$00, #$34, #$00
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db #$00, #$00, #$00, #$00, #$00
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db #$00, #$00, #$00, #$00, #$00
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db #$00, #$00, #$00, #$00, #$00
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;--------------------------------------------------------------------------------
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