mirror of
https://github.com/zellyn/goapple2.git
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92 lines
2.1 KiB
Org Mode
92 lines
2.1 KiB
Org Mode
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* Debugging the Chivalry disk
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Ascending memory references from $1F76.
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** Disassembly of routine that is overwriting from $1F76
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$73,$74
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$77,$78
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$5B
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$5C
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$5D
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$62
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$1F51: A0 00 LDY #$00
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$1F53: B1 73 LDA ($73),Y
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$1F55: 85 5C STA $5C
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$1F57: C8 INY
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$1F58: B1 73 LDA ($73),Y
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$1F5A: 85 5B STA $5B
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$1F5C: C8 INY
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$1F5D: 18 CLC
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$1F5E: 98 TYA
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$1F5F: 65 73 ADC $73
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$1F61: 85 73 STA $73
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$1F63: A9 00 LDA #$00
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$1F65: 65 74 ADC $74
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$1F67: 85 74 STA $74
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$1F69: 20 9C 1D JSR $1D9C
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$1F6C: A2 00 LDX #$00
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$1F6E: A0 00 LDY #$00
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$1F70: A5 5C LDA $5C
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$1F72: 85 5D STA $5D
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$1F74: B1 73 LDA ($73),Y
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$1F76: 91 77 STA ($77),Y
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$1F78: C8 INY
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$1F79: C6 5D DEC $5D
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$1F7B: D0 F7 BNE $1F74
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$1F7D: 18 CLC
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$1F7E: 98 TYA
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$1F7F: 65 73 ADC $73
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$1F81: 85 73 STA $73
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$1F83: A9 00 LDA #$00
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$1F85: 65 74 ADC $74
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$1F87: 85 74 STA $74
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$1F89: E6 62 INC $62
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$1F8B: C6 5B DEC $5B
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$1F8D: D0 DA BNE $1F69
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$1F8F: 60 RTS
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** Routine it calls: $1D9C
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$5E
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$61
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$62
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$64
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$77
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$78
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$1D9C: A5 62 LDA $62
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$1D9E: AA TAX
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$1D9F: 0A ASL
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$1DA0: 0A ASL
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$1DA1: 29 1C AND #$1C
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$1DA3: 85 78 STA $78
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$1DA5: 8A TXA
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$1DA6: 6A ROR
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$1DA7: AA TAX
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$1DA8: 6A ROR
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$1DA9: 6A ROR
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$1DAA: 6A ROR
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$1DAB: 08 PHP
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$1DAC: 29 03 AND #$03
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$1DAE: 05 78 ORA $78
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$1DB0: 05 5E ORA $5E
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$1DB2: 85 78 STA $78
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$1DB4: 8A TXA
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$1DB5: 29 60 AND #$60
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$1DB7: 85 77 STA $77
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$1DB9: 6A ROR
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$1DBA: 28 PLP
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$1DBB: 6A ROR
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$1DBC: 29 98 AND #$98
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$1DBE: 05 77 ORA $77
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$1DC0: 85 77 STA $77
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$1DC2: A6 61 LDX $61
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$1DC4: BD D2 1D LDA $1DD2,X
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$1DC7: 18 CLC
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$1DC8: 65 77 ADC $77
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$1DCA: 85 77 STA $77
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$1DCC: BD 5E 1E LDA $1E5E,X
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$1DCF: 85 64 STA $64
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$1DD1: 60 RTS
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