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Routines |
| Prev: 748C | Up: Map | Next: 74C7 |
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Used by the routine at 74C8. Returns with the zero flag set if a character was hit, and the stricken character's number in B.
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| 74A0 | LD B,$06 | There are six adult characters | ||||||||
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This entry point is used by the routine at 76AC with B=5 (only five of the adults are pelletable) and H=0xD5/0xD6 (BOY WANDER's or ERIC's pellet).
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| 74A2 | LD C,H | Save the projectile's character number in C | ||||||||
| 74A3 | LD H,$C8 | 0xC8=MR WACKER | ||||||||
| 74A5 | LD L,$02 | Point HL at byte 0x02 of the potential target's character buffer | ||||||||
| 74A7 | LD A,D | A=projectile's y-coordinate | ||||||||
| 74A8 | CP (HL) | Does it match the y-coordinate of the character? | ||||||||
| 74A9 | JR NZ,$74C1 | Jump if not | ||||||||
| 74AB | LD L,$00 | |||||||||
| 74AD | LD A,(HL) | A=character's animatory state | ||||||||
| 74AE | AND $87 | Is the character sitting on the floor facing left (already struck)? | ||||||||
| 74B0 | CP $06 | |||||||||
| 74B2 | JR Z,$74B9 | Jump if so | ||||||||
| 74B4 | DEC L | L=-1 | ||||||||
| 74B5 | CP $86 | Is the character sitting on the floor facing right (already struck)? | ||||||||
| 74B7 | JR Z,$74BA | Jump if so | ||||||||
| 74B9 | INC L | |||||||||
| 74BA | LD A,L | A=-1 if the character is sitting on the floor facing right, 0 if he's standing, or 1 if he's sitting on the floor facing left | ||||||||
| 74BB | LD L,$01 | Byte 0x01 of the character's buffer holds his x-coordinate | ||||||||
| 74BD | ADD A,(HL) | Now A=x-coordinate of the character's head | ||||||||
| 74BE | CP E | Does it match the x-coordinate of the projectile? | ||||||||
| 74BF | JR Z,$74C4 | Jump if so | ||||||||
| 74C1 | INC H | Next potential target | ||||||||
| 74C2 | DJNZ $74A5 | Jump back to consider any remaining characters | ||||||||
| 74C4 | LD B,H | B=number of the character who was hit by the projectile (if any) | ||||||||
| 74C5 | LD H,C | Restore the projectile's character number to H | ||||||||
| 74C6 | RET | Return with the zero flag set if a character was hit | ||||||||
| Prev: 748C | Up: Map | Next: 74C7 |