158 lines
1.9 KiB
NASM
158 lines
1.9 KiB
NASM
FastCreditsActive = $50
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;===================================================================================================
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FlagFastCredits:
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LDA.b #$40
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TRB.b FastCreditsActive
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AND.b Joy1B_All
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TSB.b FastCreditsActive
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LDA.b #$20
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AND.b Joy1A_New
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EOR.b FastCreditsActive
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STA.b FastCreditsActive
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LDA.b FastCreditsActive
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AND.b #$60
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BEQ .slow
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LDA.b #$01
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TSB.b FastCreditsActive
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.slow
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LDA.b $11
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ASL
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TAX
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RTL
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;===================================================================================================
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FastCreditsCutsceneTimer:
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LDA.b ScrapBufferBD+$0B
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INC
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JSR IsFastCredits
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BCC .slow
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INC
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INC
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INC
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AND.w #$FFFE
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.slow
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STA.b ScrapBufferBD+$0B
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SEP #$20
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RTL
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FastCreditsScrollOW:
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JSR FastCreditsCutsceneScrollY
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TAY
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STY.b $30
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JSR FastCreditsCutsceneScrollX
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TAY
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STY.b $31
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RTL
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FastCreditsCutsceneScrollX:
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PHX
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TXA
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CLC
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ADC.w #$0020
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TAX
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LDY.b #$00
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JSR FastCreditsCutsceneScroll
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PLX
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RTS
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FastCreditsCutsceneScrollY:
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LDY.b #$06
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FastCreditsCutsceneScroll:
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LDA.w $00E2,Y
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CMP.l $8EC308,X ; compare to target
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ROL.b Scrap00 ; put carry in here
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LDA.l $8EC348,X ; get movement
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BPL ++ ; if positive, leave saved carry alone
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INC.b Scrap00 ; otherwise, flip it
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++ ROR.b Scrap00 ; recover carry
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BCC ++ ; scroll if carry not set
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LDA.w #$0000
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++ JSR IsFastCredits
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BCC .slow
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AND.w #$FFFF ; get sign of A
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BPL .positive
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EOR.w #$FFFF
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INC
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ASL
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ASL
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EOR.w #$FFFF
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INC
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RTS
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.positive
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ASL
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ASL
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.slow
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RTS
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FastCreditsCutsceneUnderworldX:
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JSR FastCreditsCutsceneScrollX
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CLC
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ADC.b BG2H
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STA.b BG2H
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RTL
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FastCreditsCutsceneUnderworldY:
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JSR FastCreditsCutsceneScrollY
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CLC
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ADC.b BG2V
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STA.b BG2V
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RTL
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FastTextScroll:
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LDA.b FrameCounter
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SEP #$10
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JSR IsFastCredits
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BCC .slow
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AND.w #$0000
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REP #$10
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RTL
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.slow
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AND.w #$0003
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REP #$10
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RTL
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DumbFlagForMSU:
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STA.l CurrentWorld
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STZ.b FastCreditsActive
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RTL
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IsFastCredits:
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LDY.b FastCreditsActive
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CPY.b #$20
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RTS
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