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Routines |
| Prev: 77C6 | Up: Map | Next: 77F2 |
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Used by the routines at 77F2 and 7813. On entry, B holds 3 when checking whether it's worth ANGELFACE raising his fist (77F2), or 2 when ERIC or ANGELFACE has already raised his fist (7813). Returns with the carry flag reset if anyone was hit or is within hitting range, and D holding that unfortunate character's number.
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| 77C8 | LD L,$00 | Point HL at byte 0x00 of the punching character's buffer | ||||||||
| 77CA | BIT 7,(HL) | Set the zero flag if the character is facing left | ||||||||
| 77CC | LD L,$01 | |||||||||
| 77CE | LD C,(HL) | C=punching character's x-coordinate | ||||||||
| 77CF | PUSH BC | Save this x-coordinate for now | ||||||||
| 77D0 | LD A,B | A=2 (fist already raised) or 3 | ||||||||
| 77D1 | JR NZ,$77D5 | Jump if the punching character is facing right | ||||||||
| 77D3 | NEG | |||||||||
| 77D5 | ADD A,(HL) | A=x-coordinate of the spot 2 or 3 spaces in front of the punching character | ||||||||
| 77D6 | LD (HL),A | Set this as the character's x-coordinate temporarily | ||||||||
| 77D7 | DEC L | L=0x00 | ||||||||
| 77D8 | LD A,(HL) | A=punching character's animatory state | ||||||||
| 77D9 | CPL | C=0x00 if the character's facing right, 0x80 if left | ||||||||
| 77DA | AND $80 | |||||||||
| 77DC | LD C,A | |||||||||
| 77DD | LD D,$CE | 0xCE=BOY WANDER (first main kid) | ||||||||
| 77DF | LD B,$05 | There are 5 main kids | ||||||||
| 77E1 | CALL $6C9C | Were any of them hit? | ||||||||
| 77E4 | JR NC,$77ED | Jump if so | ||||||||
| 77E6 | LD D,$B7 | 0xB7=little girl no. 1 | ||||||||
| 77E8 | LD B,$11 | There are 17 little kids (10 boys, 7 girls) | ||||||||
| 77EA | CALL $6C9C | Reset the carry flag if any of them were hit | ||||||||
| 77ED | POP BC | Restore the punching character's x-coordinate | ||||||||
| 77EE | LD L,$01 | |||||||||
| 77F0 | LD (HL),C | |||||||||
| 77F1 | RET | Return with the carry flag reset if someone was hit or found within hitting range, and D holding that character's number | ||||||||
| Prev: 77C6 | Up: Map | Next: 77F2 |