222 lines
4.0 KiB
ArmAsm
222 lines
4.0 KiB
ArmAsm
*
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* Ultima II: The Revenge of the Enchanteress
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*
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* (c) 1982, Sierra On-Line
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* (s) 2020, John Disam
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*
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TYP BIN
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ORG $0240
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MX %11
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LST OFF
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*----------------------------
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L0240 LDA $10
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CMP #$FF
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BNE L0249
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JMP L02D7
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L0249 SEC
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LDA $01
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SBC #$05
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STA $03
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SEC
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LDA $00
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SBC #$09
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STA $02
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LDA #$00
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STA $05
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STA $04
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TAY
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TAX
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L025F CLC
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LDA $04
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ADC $02
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CMP #$40
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BCS L0270
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LDA $05
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ADC $03
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CMP #$40
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BCC L0275
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L0270 LDA $10
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JMP L0291
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L0275 STA $07
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LDA #$00
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LSR $07
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ROR
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LSR $07
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ROR
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ADC $04
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ADC $02
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STA $06
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CLC
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LDA $07
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ADC #$10
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STA $07
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LDA ($06),Y
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LSR
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AND #$FE
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L0291 CMP $4C00,X
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BNE L02A0
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CMP #$00
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BEQ L02A0
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CMP #$2E
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BEQ L02A0
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ORA #$80
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L02A0 STA $4B00,X
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INX
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INC $04
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LDA $04
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CMP #$14
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BNE L025F
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STY $04
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INC $05
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LDA $05
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CMP #$0A
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BNE L025F
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LDA $4B6D
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STA $12
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LDA $4B59
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STA $13
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LDA $4B81
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STA $14
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LDA $4B6C
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STA $16
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LDA $4B6E
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STA $15
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LDA $11
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STA $4B6D
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JMP L035E
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L02D7 SEC
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LDA $01
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SBC #$05
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AND #$3F
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STA $03
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SEC
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LDA $00
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SBC #$09
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AND #$3F
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STA $02
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LDA #$00
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STA $05
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STA $04
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TAY
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TAX
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L02F1 CLC
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LDA $04
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ADC $02
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AND #$3F
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STA $17
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CLC
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LDA $05
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ADC $03
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AND #$3F
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STA $07
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LDA #$00
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LSR $07
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ROR
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LSR $07
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ROR
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ADC $17
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STA $06
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CLC
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LDA $07
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ADC #$10
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STA $07
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LDA ($06),Y
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LSR
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AND #$FE
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CMP $4C00,X
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BNE L032A
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CMP #$00
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BEQ L032A
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CMP #$2E
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BEQ L032A
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ORA #$80
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L032A STA $4B00,X
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INX
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INC $04
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LDA $04
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CMP #$14
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BNE L02F1
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STY $04
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INC $05
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LDA $05
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CMP #$0A
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BNE L02F1
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LDA $4B6D
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STA $12
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LDA $4B59
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STA $13
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LDA $4B81
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STA $14
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LDA $4B6C
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STA $16
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LDA $4B6E
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STA $15
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LDA $11
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STA $4B6D
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L035E LDX #$00
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STX $0C
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L0362 LDY $0C
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LDA $472C,Y
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STA L0399+1
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STA L03A5+1
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LDA $47EC,Y
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STA L0399+2
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STA L03A5+2
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TYA
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AND #$0F
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LSR
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ORA #$08
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STA L0394+2
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STA L039F+2
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LDA #$00
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STA $0D
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ROR
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STA L0394+1
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ADC #$01
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STA L039F+1
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L038F LDY $4B00,X
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BMI L03A8
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L0394 LDA $FFFF,Y
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LDY $0D
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L0399 STA $FFFF,Y
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LDY $4B00,X
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L039F LDA $FFFF,Y
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LDY $0D
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INY
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L03A5 STA $FFFF,Y
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L03A8 INX
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LDA $0D
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CLC
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ADC #$02
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STA $0D
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CMP #$28
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BNE L038F
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INC $0C
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LDA $0C
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CMP #$A0
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BEQ L03C7
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AND #$0F
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BEQ L0362
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TXA
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SBC #$13
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TAX
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JMP L0362
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L03C7 LDX #$00
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L03C9 LDA $4B00,X
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AND #$7F
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STA $4C00,X
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INX
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CPX #$F0
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BNE L03C9
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RTS
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HEX A0
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HEX D3
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