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Load routines |
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23831 | DI | Disable interrupts | ||
23832 | LD B,49 | |||
23834 | LD DE,65487 | |||
23837 | CALL 24046 | |||
And so begins the misdirection.
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24046 | POP HL | HL=23840 | ||
24047 | ADD HL,DE | HL=23791 | ||
24048 | PUSH HL | |||
24049 | LD DE,7 | |||
24052 | ADD HL,DE | HL=23798 | ||
24053 | RET | Jump to 23791 | ||
Undo some code obfuscation before continuing.
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23791 | LD A,(HL) | Do some XORing on the 49 bytes from 23798 to 23846 | ||
23792 | XOR H | |||
23793 | XOR L | |||
23794 | LD (HL),A | |||
23795 | INC HL | |||
23796 | DJNZ 23791 | |||
After the XORing:
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23798 | EXX | |||
23799 | EX (SP),HL | HL'=11563 | ||
23800 | LD A,H | A=45 | ||
23801 | AND L | A=41 | ||
23802 | ADD A,L | A=84 | ||
23803 | ADD A,L | A=127 | ||
23804 | LD H,A | H'=127 | ||
23805 | ADD A,78 | A=205 | ||
23807 | LD L,A | HL'=32717 | ||
23808 | EXX | |||
23809 | LD HL,23551 | INK 1: PAPER 1 | ||
23812 | LD (HL),9 | |||
23814 | DEC HL | |||
23815 | BIT 3,H | |||
23817 | JR NZ,23812 | |||
23819 | LD (HL),0 | Clear the display file | ||
23821 | DEC HL | |||
23822 | BIT 6,H | |||
23824 | JR NZ,23819 | |||
23826 | INC E | DE=9 | ||
23827 | INC E | |||
23828 | CALL 24046 | |||
More misdirection.
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24046 | POP HL | HL=23831 | ||
24047 | ADD HL,DE | HL=23840 | ||
24048 | PUSH HL | |||
24049 | LD DE,7 | |||
24052 | ADD HL,DE | HL=23847 | ||
24053 | RET | Jump to 23840 | ||
Undo some more code obfuscation before continuing.
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23840 | LD A,(HL) | Do some XORing and RLCing on the 217 bytes from 23847 to 24063 | ||
23841 | XOR E | |||
23842 | RLCA | |||
23843 | LD (HL),A | |||
23844 | INC L | |||
23845 | JR NZ,23840 | |||
After the XORing and RLCing:
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23847 | PUSH HL | HL=23808 | ||
23848 | EXX | |||
23849 | POP DE | DE'=23808 | ||
23850 | EX DE,HL | DE'=32717 | ||
23851 | LD BC,255 | Copy 255 bytes from 23808-24062 to 32717-32971 | ||
23854 | LDIR | |||
23856 | LD E,A | E'=47 | ||
23857 | EX DE,HL | HL'=32815 | ||
23858 | JP (HL) | Jump to 32815 |
Up: Map | Next: 32768 |