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bank00.asm
27328 lines (20517 loc) · 573 KB
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bank00.asm
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;@ base $8000
;===================================================================================================
RESET:
#_8000: SEI
#_8001: CLD
#_8002: LDX.b #$FF
#_8004: TXS
.wait_a
#_8005: LDA.w PPUSTATUS
#_8008: BPL .wait_a
.wait_b
#_800A: LDA.w PPUSTATUS
#_800D: BPL .wait_b
#_800F: JMP InitializeGame
;===================================================================================================
WriteToPPU:
#_8012: STA.w PPUDATA
#_8015: RTS
;===================================================================================================
SetPPUADDRSafely:
#_8016: STA.w PPUADDR
#_8019: STX.w PPUADDR
;===================================================================================================
FlushCamera:
#_801C: LDA.b $06
#_801E: STA.w PPUSCROLL
#_8021: LDA.b $07
#_8023: STA.w PPUSCROLL
#_8026: LDA.b $00
#_8028: STA.w PPUCTRL
#_802B: RTS
;===================================================================================================
ResetSmokeAndTransients:
#_802C: LDA.b #$00
#_802E: STA.b $78
#_8030: STA.b $79
#_8032: STA.b $7A
#_8034: STA.b $91
#_8036: TAX
.clear_a
#_8037: STA.w $01C0,X
#_803A: INX
#_803B: CPX.b #$10
#_803D: BNE .clear_a
#_803F: LDX.b #$03
.clear_b
#_8041: STA.b $83,X
#_8043: DEX
#_8044: BPL .clear_b
#_8046: RTS
;===================================================================================================
ClearSpritesAndBG:
#_8047: LDA.b $00
#_8049: ORA.b #$10
#_804B: JSR SetPPUCTRL
#_804E: LDA.b #$00
#_8050: STA.b $08
#_8052: STA.b $39
#_8054: STA.b $0B
#_8056: STA.w $0200
#_8059: STA.b $19
#_805B: STA.b $18
#_805D: JSR ClearOAM
#_8060: JSR ResetSmokeAndTransients
;===================================================================================================
ClearTilemapWith00:
#_8063: LDA.b #$00
#_8065: STA.b $1C
#_8067: BEQ ClearTilemap
;===================================================================================================
ClearTilemapWith2F:
#_8069: LDA.b #$2F
#_806B: STA.b $1C
;===================================================================================================
ClearTilemap:
#_806D: LDA.b #$20 ; VRAM $2000
#_806F: LDX.b #$00
#_8071: JSR SetPPUADDRSafely
#_8074: LDY.b #$08
#_8076: LDX.b #$00
#_8078: LDA.b $1C
.next_write
#_807A: JSR WriteToPPU
#_807D: DEX
#_807E: BNE .next_write
#_8080: DEY
#_8081: BNE .next_write
;---------------------------------------------------------------------------------------------------
#_8083: LDA.b #$23 ; VRAM $23C0
#_8085: JSR .clear_page
#_8088: LDA.b #$27 ; VRAM $27C0
;---------------------------------------------------------------------------------------------------
.clear_page
#_808A: LDX.b #$C0
#_808C: JSR SetPPUADDRSafely
#_808F: LDA.b #$00
.next_clear
#_8091: JSR WriteToPPU
#_8094: INX
#_8095: BNE .next_clear
#_8097: RTS
;===================================================================================================
NextFrameWithBGandOAM:
#_8098: JSR NextFrame
#_809B: LDA.b #$0A
#_809D: JSR SetPPUMask
;===================================================================================================
FlushOAM:
#_80A0: LDA.b #$00
#_80A2: STA.w OAMADDR
#_80A5: LDA.b #$03
#_80A7: STA.w OAMDMA
#_80AA: RTS
;===================================================================================================
NextFrameWithMaskReset:
#_80AB: JSR ResetUpdateQueues
#_80AE: JSR NextFrame
#_80B1: LDA.b #$00
;===================================================================================================
SetPPUMask:
#_80B3: STA.w PPUMASK
.set_mask_queue
#_80B6: STA.b $01
#_80B8: RTS
;===================================================================================================
#EnableSpriteDraw:
#_80B9: LDA.b $01
#_80BB: ORA.b #$14
#_80BD: BNE .set_mask_queue
;===================================================================================================
; FREE ROM: 0x03
;===================================================================================================
UNREACHABLE_80BF:
#_80BF: JMP ClearOAM
;===================================================================================================
NextFrame:
.wait_for_vblank
#_80C2: LDA.w PPUSTATUS
#_80C5: BMI .wait_for_vblank
.wait_for_end
#_80C7: LDA.w PPUSTATUS
#_80CA: BPL .wait_for_end
#_80CC: RTS
;===================================================================================================
NextFrameWithUpdates:
#_80CD: LDA.b #$00
#_80CF: STA.b $3A
#_80D1: JSR NextFrame
#_80D4: LDA.b $00
#_80D6: ORA.b #$80
#_80D8: BNE SetPPUCTRL
;===================================================================================================
WaitForNMI:
#_80DA: JSR ResetUpdateQueues
#_80DD: LDA.b #$00
#_80DF: STA.b $39
.spin
#_80E1: LDA.b $39
#_80E3: BEQ .spin
#_80E5: LDA.b $00
#_80E7: AND.b #$7F
;===================================================================================================
SetPPUCTRL:
#_80E9: STA.b $00
#_80EB: STA.w PPUCTRL
#_80EE: RTS
;===================================================================================================
ResetUpdateQueues:
#_80EF: LDA.b #$00
#_80F1: STA.b $18
#_80F3: STA.w $0200
#_80F6: STA.b $19
#_80F8: STA.b $97
#_80FA: RTS
;===================================================================================================
GetDefaultSpritePalettes:
#_80FB: LDA.w $05E0
#_80FE: STA.b $1E
#_8100: LDX.b $87
#_8102: BEQ .use_set_a
#_8104: LDX.b #$10
.use_set_a
#_8106: LDY.b #$00
.next
#_8108: TYA
#_8109: AND.b #$03
#_810B: BEQ .skip
#_810D: LDA.w DefaultSpritePalettes,X
#_8110: STA.w $05F0,Y
#_8113: JMP .continue
.skip
#_8116: LDA.b $1E
#_8118: STA.w $05F0,Y
.continue
#_811B: INX
#_811C: INY
#_811D: CPY.b #$10
#_811F: BNE .next
#_8121: JSR IsShrineOrBossRoom
#_8124: BCC EXIT_8146
;===================================================================================================
LoadScarySpritePalette_full:
#_8126: LDY.b #$04
#_8128: JSR LoadScarySpritePalette
#_812B: LDY.b #$0C
#_812D: JSR LoadScarySpritePalette
#_8130: LDY.b #$00
;===================================================================================================
LoadScarySpritePalette:
#_8132: LDA.b #$03
#_8134: STA.b $1C
#_8136: LDX.w ScarySpritePalettes,Y
#_8139: INY
.next
#_813A: LDA.w ScarySpritePalettes,Y
#_813D: STA.w $05F0,X
#_8140: INY
#_8141: INX
#_8142: DEC.b $1C
#_8144: BNE .next
;---------------------------------------------------------------------------------------------------
#EXIT_8146:
#_8146: RTS
;===================================================================================================
IsShrineOrBossRoom:
#_8147: LDA.b $87
#_8149: CMP.b #$0C ; ROOM 0C
#_814B: BEQ .succeed
#_814D: CMP.b #$0D ; ROOM 0D
#_814F: BEQ .succeed
#_8151: CMP.b #$15 ; ROOM 15
#_8153: BCC .fail
.succeed
#_8155: SEC
#_8156: RTS
.fail
#_8157: CLC
#_8158: RTS
;===================================================================================================
; PALETTE DATA
;===================================================================================================
ScarySpritePalettes:
; index colors
#_8159: db $0D : db $0F, $16, $37 ; Maharito / Shrine
#_815D: db $05 : db $2A, $00, $30 ; Maharito / Shrine
#_8161: db $0D : db $05, $0F, $0F ; Maharito flashing
#_8165: db $09 : db $16, $35, $30 ; Maharito / Shrine
;===================================================================================================
RefreshGFXBank:
#_8169: LDX.b $94
;===================================================================================================
SetGFXBank:
#_816B: LDA.w GFXBanks,X
#_816E: STA.w GFXBanks,X
#_8171: RTS
;===================================================================================================
ReloadDefaultSpritePalettes:
#_8172: JSR GetDefaultSpritePalettes
;===================================================================================================
ReloadPalettesWithWait:
#_8175: JSR NextFrame
;===================================================================================================
UploadPalettes:
#_8178: LDA.b #$3F ; VRAM $3F00
#_817A: LDX.b #$00
#_817C: JSR SetPPUADDRSafely
#_817F: LDY.b #$00
.next
#_8181: LDA.w $05E0,Y
#_8184: JSR WriteToPPU
#_8187: INY
#_8188: CPY.b #$20
#_818A: BNE .next
#_818C: LDA.b #$3F ; VRAM $3F00
#_818E: STA.w PPUADDR
#_8191: LDA.b #$00
#_8193: STA.w PPUADDR
#_8196: STA.w PPUADDR ; VRAM $0000
#_8199: STA.w PPUADDR
#_819C: JMP FlushCamera
;===================================================================================================
NMI:
#_819F: PHA
#_81A0: TXA
#_81A1: PHA
#_81A2: TYA
#_81A3: PHA
#_81A4: LDA.b $3A
#_81A6: BNE .no_updates
#_81A8: JSR FlushOAM
#_81AB: JSR FlushCamera
#_81AE: JSR RefreshGFXBank
#_81B1: LDA.b #$04
#_81B3: STA.b $1A
;---------------------------------------------------------------------------------------------------
#_81B5: LDY.b $18
#_81B7: LDA.w $0200,Y
#_81BA: BEQ .no_uploads
.next_vram_upload
#_81BC: LDY.b $18
#_81BE: LDA.w $0200,Y
#_81C1: BEQ .stop_uploading
#_81C3: JSR ArbitraryVRAMTransfer
#_81C6: DEC.b $1A
#_81C8: BEQ .stop_uploading
#_81CA: JMP .next_vram_upload
.no_uploads
#_81CD: LDA.b $97
#_81CF: BEQ .stop_uploading
#_81D1: JSR UploadPalettes
;---------------------------------------------------------------------------------------------------
.stop_uploading
#_81D4: LDA.b $01
#_81D6: STA.w PPUMASK
#_81D9: LDA.b #$01
#_81DB: STA.w JOY1
#_81DE: LDA.b #$00
#_81E0: STA.w JOY1
#_81E3: LDX.b #$08
.poll_controllers
#_81E5: LDA.w JOY1
#_81E8: LSR A
#_81E9: ROL.b $02
#_81EB: LSR A
#_81EC: ROL.b $03
#_81EE: LDA.w JOY2
#_81F1: LSR A
#_81F2: ROL.b $04
#_81F4: LSR A
#_81F5: ROL.b $05
#_81F7: DEX
#_81F8: BNE .poll_controllers
;---------------------------------------------------------------------------------------------------
#_81FA: LDA.b $04
#_81FC: AND.b #$CF ; Mask out JOY2 start/select
#_81FE: ORA.b $02
#_8200: ORA.b $03
#_8202: ORA.b $05
#_8204: STA.b $08
#_8206: LDA.b #$01
#_8208: STA.b $39
#_820A: JSR RunLightningTimer
.no_updates
#_820D: JSR HandleMusic
#_8210: JSR HandleSFX
#_8213: PLA
#_8214: TAY
#_8215: PLA
#_8216: TAX
#_8217: PLA
#_8218: RTI
;===================================================================================================
RunLightningTimer:
#_8219: INC.b $90
#_821B: LDA.b $90
#_821D: CMP.b #$78
#_821F: BCC .dont_reset
#_8221: LDA.b #$00
#_8223: STA.b $90
#_8225: DEC.b $8F
#_8227: BPL .dont_reset
#_8229: LDA.b #$09
#_822B: STA.b $8F
.dont_reset
#_822D: LDA.b $BF
#_822F: EOR.b #$01
#_8231: AND.b $8A
#_8233: BEQ EXIT_824E
#_8235: LDA.b $90
#_8237: ORA.b $8F
#_8239: BNE EXIT_824E
#_823B: LDA.b $98
#_823D: EOR.b #$02
#_823F: STA.b $98
#_8241: JMP HandleAndFlagOverworldPalette
;===================================================================================================
ArbitraryVRAMTransfer:
#_8244: ASL A
#_8245: TAX
#_8246: LDA.w .vectors-1,X
#_8249: PHA
#_824A: LDA.w .vectors-2,X
#_824D: PHA
;---------------------------------------------------------------------------------------------------
#EXIT_824E:
#_824E: RTS
;---------------------------------------------------------------------------------------------------
.vectors
#_824F: dw ArbVXfrOneRow-1 ; 01
#_8251: dw ArbVXfrPanMapAttributes-1 ; 02
#_8253: dw ArbVXfrOneTile-1 ; 03
#_8255: dw ArbVXfr2x2WithProps-1 ; 04
#_8257: dw ArbVXfrTwoTiles-1 ; 05
#_8259: dw ArbVXfrNullTerminated-1 ; 06
#_825B: dw ArbVXfrOneTileXY-1 ; 07
;===================================================================================================
ArbVXfrOneRow:
#_825D: INY
#_825E: LDA.w $0200,Y
#_8261: INY
#_8262: TAX
#_8263: LDA.w $0200,Y
#_8266: INY
#_8267: JSR SetPPUADDRSafely
#_826A: LDA.b #$02
#_826C: STA.b $02
.next
#_826E: LDA.w $0200,Y
#_8271: INY
#_8272: STA.w PPUDATA
#_8275: LDA.w $0200,Y
#_8278: INY
#_8279: STA.w PPUDATA
#_827C: LDA.w $0200,Y
#_827F: INY
#_8280: STA.w PPUDATA
#_8283: LDA.w $0200,Y
#_8286: INY
#_8287: STA.w PPUDATA
#_828A: LDA.w $0200,Y
#_828D: INY
#_828E: STA.w PPUDATA
#_8291: LDA.w $0200,Y
#_8294: INY
#_8295: STA.w PPUDATA
#_8298: LDA.w $0200,Y
#_829B: INY
#_829C: STA.w PPUDATA
#_829F: LDA.w $0200,Y
#_82A2: INY
#_82A3: STA.w PPUDATA
#_82A6: LDA.w $0200,Y
#_82A9: INY
#_82AA: STA.w PPUDATA
#_82AD: LDA.w $0200,Y
#_82B0: INY
#_82B1: STA.w PPUDATA
#_82B4: LDA.w $0200,Y
#_82B7: INY
#_82B8: STA.w PPUDATA
#_82BB: LDA.w $0200,Y
#_82BE: INY
#_82BF: STA.w PPUDATA
#_82C2: LDA.w $0200,Y
#_82C5: INY
#_82C6: STA.w PPUDATA
#_82C9: LDA.w $0200,Y
#_82CC: INY
#_82CD: STA.w PPUDATA
#_82D0: LDA.w $0200,Y
#_82D3: INY
#_82D4: STA.w PPUDATA
#_82D7: LDA.w $0200,Y
#_82DA: INY
#_82DB: STA.w PPUDATA
#_82DE: DEC.b $02
#_82E0: BNE .next
#_82E2: STY.b $18
#_82E4: RTS
;===================================================================================================
ArbVXfrPanMapAttributes:
#_82E5: INY
#_82E6: LDA.w $0200,Y
#_82E9: INY
#_82EA: TAX
#_82EB: STX.b $05
#_82ED: LDA.w $0200,Y
#_82F0: INY
#_82F1: STA.b $04
#_82F3: JSR SetPPUADDRSafely
#_82F6: LDA.w $0200,Y
#_82F9: INY
#_82FA: STA.b $1B
#_82FC: LDX.b #$00
#_82FE: LDA.w PPUDATA
#_8301: LDA.w PPUDATA
#_8304: AND.b $1B
#_8306: STA.w $06F0,X
#_8309: INX
#_830A: LDA.w PPUDATA
#_830D: AND.b $1B
#_830F: STA.w $06F0,X
#_8312: INX
#_8313: LDA.w PPUDATA
#_8316: AND.b $1B
#_8318: STA.w $06F0,X
#_831B: INX
#_831C: LDA.w PPUDATA
#_831F: AND.b $1B
#_8321: STA.w $06F0,X
#_8324: INX
#_8325: LDA.w PPUDATA
#_8328: AND.b $1B
#_832A: STA.w $06F0,X
#_832D: INX
#_832E: LDA.w PPUDATA
#_8331: AND.b $1B
#_8333: STA.w $06F0,X
#_8336: INX
#_8337: LDA.w PPUDATA
#_833A: AND.b $1B
#_833C: STA.w $06F0,X
#_833F: INX
#_8340: LDA.w PPUDATA
#_8343: AND.b $1B
#_8345: STA.w $06F0,X
;---------------------------------------------------------------------------------------------------
#_8348: INX
#_8349: LDA.b $04
#_834B: LDX.b $05
#_834D: JSR SetPPUADDRSafely
#_8350: LDX.b #$00
#_8352: LDA.w $06F0,X
#_8355: ORA.w $0200,Y
#_8358: INY
#_8359: STA.w PPUDATA
#_835C: INX
#_835D: LDA.w $06F0,X
#_8360: ORA.w $0200,Y
#_8363: INY
#_8364: STA.w PPUDATA
#_8367: INX
#_8368: LDA.w $06F0,X
#_836B: ORA.w $0200,Y
#_836E: INY
#_836F: STA.w PPUDATA
#_8372: INX
#_8373: LDA.w $06F0,X
#_8376: ORA.w $0200,Y
#_8379: INY
#_837A: STA.w PPUDATA
#_837D: INX
#_837E: LDA.w $06F0,X
#_8381: ORA.w $0200,Y
#_8384: INY
#_8385: STA.w PPUDATA
#_8388: INX
#_8389: LDA.w $06F0,X
#_838C: ORA.w $0200,Y
#_838F: INY
#_8390: STA.w PPUDATA
#_8393: INX
#_8394: LDA.w $06F0,X
#_8397: ORA.w $0200,Y
#_839A: INY
#_839B: STA.w PPUDATA
#_839E: INX
#_839F: LDA.w $06F0,X
#_83A2: ORA.w $0200,Y
#_83A5: INY
#_83A6: STA.w PPUDATA
#_83A9: INX
#_83AA: STY.b $18
#_83AC: RTS
;===================================================================================================
ArbVXfrOneTile:
#_83AD: INY
#_83AE: LDA.w $0200,Y
#_83B1: INY
#_83B2: TAX
#_83B3: LDA.w $0200,Y
#_83B6: INY
#_83B7: JSR SetPPUADDRSafely
#_83BA: LDA.w $0200,Y
#_83BD: INY
#_83BE: STA.w PPUDATA
#_83C1: STY.b $18
#_83C3: RTS
;===================================================================================================
ArbVXfr2x2WithProps:
#_83C4: INY
#_83C5: LDA.b #$02
#_83C7: STA.b $02
.next
#_83C9: LDA.w $0200,Y
#_83CC: INY
#_83CD: TAX
#_83CE: LDA.w $0200,Y
#_83D1: INY
#_83D2: JSR SetPPUADDRSafely
#_83D5: LDA.w $0200,Y
#_83D8: INY
#_83D9: STA.w PPUDATA
#_83DC: LDA.w $0200,Y
#_83DF: INY
#_83E0: STA.w PPUDATA
#_83E3: DEC.b $02
#_83E5: BNE .next
;---------------------------------------------------------------------------------------------------
#_83E7: LDA.w $0200,Y
#_83EA: INY
#_83EB: STA.b $05
#_83ED: TAX
#_83EE: LDA.w $0200,Y
#_83F1: INY
#_83F2: STA.b $04
#_83F4: JSR SetPPUADDRSafely
#_83F7: LDA.w PPUDATA
#_83FA: LDA.w PPUDATA
#_83FD: AND.w $0200,Y
#_8400: INY
#_8401: ORA.w $0200,Y
#_8404: INY
#_8405: PHA
#_8406: LDA.b $04
#_8408: LDX.b $05
#_840A: JSR SetPPUADDRSafely
#_840D: PLA
#_840E: STA.w PPUDATA
#_8411: STY.b $18
#_8413: RTS
;===================================================================================================
ArbVXfrTwoTiles:
#_8414: INY
#_8415: LDA.b #$02
#_8417: STA.b $02
.next
#_8419: LDA.w $0200,Y
#_841C: INY
#_841D: TAX
#_841E: LDA.w $0200,Y
#_8421: INY
#_8422: JSR SetPPUADDRSafely
#_8425: LDA.w $0200,Y
#_8428: INY
#_8429: STA.w PPUDATA
#_842C: LDA.w $0200,Y
#_842F: INY
#_8430: STA.w PPUDATA
#_8433: DEC.b $02
#_8435: BNE .next
#_8437: STY.b $18
#_8439: RTS
;===================================================================================================
ArbVXfrNullTerminated:
#_843A: INY
#_843B: LDA.w $0200,Y
#_843E: INY
#_843F: TAX
#_8440: LDA.w $0200,Y
#_8443: INY
#_8444: JSR SetPPUADDRSafely
.next
#_8447: LDA.w $0200,Y
#_844A: BEQ .done
#_844C: INY
#_844D: STA.w PPUDATA
#_8450: JMP .next
.done
#_8453: INY
#_8454: STY.b $18
#_8456: RTS
;===================================================================================================
ArbVXfrOneTileXY:
#_8457: INY
#_8458: LDX.b #$00
#_845A: STX.b $0B
#_845C: INX
#_845D: STX.b $12
#_845F: LDA.w $0200,Y
#_8462: INY
#_8463: STA.b $2E
#_8465: LDA.w $0200,Y
#_8468: INY
#_8469: STA.b $2F
#_846B: LDA.w $0200,Y
#_846E: INY
#_846F: STY.b $18
;===================================================================================================
DrawTileAtXY:
#_8471: JSR GetVRAMofTileFromXY
#_8474: LDA.b $0D
#_8476: LDX.b $0C
#_8478: JSR SetPPUADDRSafely
#_847B: LDA.b $0E
#_847D: STA.w PPUDATA
#_8480: RTS
;===================================================================================================
ResetForNewArea:
#_8481: LDA.b #$01
#_8483: STA.b $3C
#_8485: LDA.b #$0A
#_8487: STA.b $47
#_8489: LDA.b #$09
#_848B: STA.b $8F
#_848D: LDA.b #$05 ; some vestigial thing?
#_848F: STA.w $07C0
#_8492: LDA.b #$00
#_8494: STA.b $3D
#_8496: STA.b $40
#_8498: STA.b $49
#_849A: STA.b $4F
#_849C: STA.b $96
#_849E: STA.b $97
#_84A0: STA.b $13
#_84A2: STA.b $31