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Routines |
| Prev: 6A17 | Up: Map | Next: 6AA6 |
| 6A27 | LD A,(HL) | A=*HL. | ||
| 6A28 | RLCA | RLCA. | ||
| 6A29 | RLCA | |||
| 6A2A | RLCA | |||
| 6A2B | RLCA | |||
| 6A2C | LD L,A | L=A. | ||
| 6A2D | AND %00001111 | Keep only bits 0-3. | ||
| 6A2F | ADD A,$C0 | H=C0+A. | ||
| 6A31 | LD H,A | |||
| 6A32 | LD A,L | A=L. | ||
| 6A33 | AND %11110000 | Keep only bits 4-7. | ||
| 6A35 | ADD A,C | A+=C. | ||
| 6A36 | LD L,A | L=A. | ||
| 6A37 | LD A,(HL) | A=*HL. | ||
| 6A38 | INC L | Increment L by one. | ||
| 6A39 | LD ($7834),A | Write A to *7834. | ||
| 6A3C | LD A,(HL) | A=*HL. | ||
| 6A3D | LD HL,$7826 | HL=7826. | ||
| 6A40 | LD (HL),$00 | Write 00 to *HL. | ||
| 6A42 | RRCA | RRCA. | ||
| 6A43 | JR NC,$6A46 | Jump to 6A46 if {} is higher. | ||
| 6A45 | INC (HL) | Increment *HL by one. | ||
| 6A46 | RRCA | RRCA. | ||
| 6A47 | LD C,A | C=A. | ||
| 6A48 | JR NC,$6A6D | Jump to 6A6D if {} is higher. | ||
| 6A4A | AND %00000011 | Keep only bits 0-1. | ||
| 6A4C | LD L,$33 | L=33. | ||
| 6A4E | JR NZ,$6A51 | Jump to 6A51 if {} is not zero. | ||
| 6A50 | DEC (HL) | Decrease *HL by one. | ||
| 6A51 | DEC A | Decrease A by one. | ||
| 6A52 | JR NZ,$6A55 | Jump to 6A55 if A is not zero. | ||
| 6A54 | INC (HL) | Increment *HL by one. | ||
| 6A55 | LD L,$26 | L=26. | ||
| 6A57 | LD B,A | B=A. | ||
| 6A58 | LD A,$23 | A=23. | ||
| 6A5A | SUB (HL) | A-=*HL. | ||
| 6A5B | LD L,A | L=A. | ||
| 6A5C | LD A,(HL) | A=*HL. | ||
| 6A5D | DEC B | Decrease B by one. | ||
| 6A5E | JR NZ,$6A65 | Jump to 6A65 if B is not zero. | ||
| 6A60 | CP $69 | Jump to 6A65 if A is equal to 69. | ||
| 6A62 | JR Z,$6A65 | |||
| 6A64 | DEC (HL) | Decrease *HL by one. | ||
| 6A65 | DEC B | Decrease B by one. | ||
| 6A66 | JR NZ,$6A6D | Jump to 6A6D if B is not zero. | ||
| 6A68 | CP $96 | Jump to 6A6D if A is equal to 96. | ||
| 6A6A | JR Z,$6A6D | |||
| 6A6C | INC (HL) | Increment *HL by one. | ||
| 6A6D | LD L,$26 | L=26. | ||
| 6A6F | LD A,(HL) | Jump to 6A94 if *HL is not zero. | ||
| 6A70 | AND A | |||
| 6A71 | JR NZ,$6A94 | |||
| 6A73 | LD L,$22 | L=22. | ||
| 6A75 | LD A,(HL) | Jump to 6A7B if bit 7 of *HL is set. | ||
| 6A76 | BIT 7,A | |||
| 6A78 | JR NZ,$6A7B | |||
| 6A7A | CPL | Invert the bits in A. | ||
| 6A7B | LD B,A | B=A. | ||
| 6A7C | DEC L | Decrease L by one. | ||
| 6A7D | LD A,(HL) | Jump to 6A83 if bit 7 of *HL is set. | ||
| 6A7E | BIT 7,A | |||
| 6A80 | JR NZ,$6A83 | |||
| 6A82 | CPL | A=00. | ||
| 6A83 | SUB B | A-=B. | ||
| 6A84 | JR NC,$6A94 | Jump to 6A94 if {} is higher. | ||
| 6A86 | CPL | Invert the bits in A. | ||
| 6A87 | SRL A | Shift A right twice. | ||
| 6A89 | SRL A | |||
| 6A8B | LD L,$34 | L=34. | ||
| 6A8D | ADD A,(HL) | A+=*HL. | ||
| 6A8E | BIT 4,A | Jump to 6A93 if bit 4 of A is not set. | ||
| 6A90 | JR Z,$6A93 | |||
| 6A92 | DEC A | Decrease A by one. | ||
| 6A93 | LD (HL),A | Write A to *HL. | ||
| 6A94 | LD A,C | A=C. | ||
| 6A95 | RRCA | RRCA. | ||
| 6A96 | RRCA | |||
| 6A97 | RRCA | |||
| 6A98 | RET NC | Return if {} is higher. | ||
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There are 07 actions. They are contained in a jump table at: JumpTable_Actions onwards.
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| 6A99 | AND %00000111 | Keep only bits 0-2. | ||
| 6A9B | ADD A,A | L=DC+(A*02). | ||
| 6A9C | ADD A,$DC | |||
| 6A9E | LD L,A | |||
| 6A9F | LD H,$B4 | H=B4. | ||
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Fetch the related action from the jump table and jump to it.
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| 6AA1 | LD A,(HL) | A=*HL. | ||
| 6AA2 | INC L | Increment L by one. | ||
| 6AA3 | LD H,(HL) | H=*HL. | ||
| 6AA4 | LD L,A | L=A. | ||
| 6AA5 | JP (HL) | Jump to *HL. | ||
| Prev: 6A17 | Up: Map | Next: 6AA6 |