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Routines |
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Used by the routine at HandlePlayerLegs.
Moves the player by one frame. The speeds along x and y are only set up while the player walks, is jumping or is entering the room, and they are cleared again afterwards. The speed along z has gravity taken off it, which is more if the player is not rising with the jump control held down. If the player lands the jump is over.
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Drop if the game is over.
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| MovePlayer | C296 | LD A,($5B24) | Fetch GameOverFlag. | |||||||
| C299 | AND A | Jump to MovePlayer_Speed if the game is not over. | ||||||||
| C29A | JR Z,MovePlayer_Speed | |||||||||
| C29C | LD (IX+$0B),$02 | Set the speed along the z axis to 02. | ||||||||
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Set the walk speeds unless the player is turning.
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| MovePlayer_Speed | C2A0 | BIT 3,(IX+$0C) | Jump to MovePlayer_Forward if the player is jumping. | |||||||
| C2A4 | JR NZ,MovePlayer_Forward | |||||||||
| C2A6 | LD A,(IX+$0C) | Fetch the collision flags. | ||||||||
| C2A9 | AND %11110000 | Keep only bits 4-7. | ||||||||
| C2AB | JR NZ,MovePlayer_Forward | Jump to MovePlayer_Forward if the player is entering the room. | ||||||||
| C2AD | BIT 3,(IX+$00) | Jump to MovePlayer_Gravity if bit 3 of the sprite number is set. | ||||||||
| C2B1 | JR NZ,MovePlayer_Gravity | |||||||||
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This entry point is used by the routine at HandleTurningLegs.
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| MovePlayer_WalkControl | C2B3 | BIT 2,C | Jump to MovePlayer_Gravity if bit 2 of C is clear. | |||||||
| C2B5 | JR Z,MovePlayer_Gravity | |||||||||
| MovePlayer_Forward | C2B7 | PUSH BC | Stash BC on the stack. | |||||||
| C2B8 | CALL SetPlayerSpeed | Call SetPlayerSpeed. | ||||||||
| C2BB | POP BC | Restore BC from the stack. | ||||||||
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This entry point is used by the routine at HandleTurningLegs.
Gravity takes one off the speed along z when the player is rising with the jump control held down, and two otherwise.
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| MovePlayer_Gravity | C2BC | LD A,(IX+$0B) | Fetch the speed along the z axis. | |||||||
| C2BF | AND A | Jump to MovePlayer_Fall if the player is falling. | ||||||||
| C2C0 | JP M,MovePlayer_Fall | |||||||||
| C2C3 | BIT 3,C | Jump to MovePlayer_Store if bit 3 of C is set. | ||||||||
| C2C5 | JR NZ,MovePlayer_Store | |||||||||
| MovePlayer_Fall | C2C7 | DEC A | Decrement A. | |||||||
| MovePlayer_Store | C2C8 | DEC A | Decrement A. | |||||||
| C2C9 | LD (IX+$0B),A | Store the speed along the z axis. | ||||||||
| C2CC | LD ($5B21),A | Set PreviousVerticalSpeed. | ||||||||
| C2CF | ADD A,$02 | Add 02. | ||||||||
| C2D1 | CALL M,PlaySoundFromHeight | Call PlaySoundFromHeight if the sign flag is set. | ||||||||
| C2D4 | CALL BlockMovement | Call BlockMovement. | ||||||||
| C2D7 | CALL HandleRoomExit | Call HandleRoomExit. | ||||||||
| C2DA | CALL MoveObject | Call MoveObject. | ||||||||
| C2DD | BIT 2,(IX+$0C) | Jump to ClearSpeed if the player is in the air. | ||||||||
| C2E1 | JR Z,ClearSpeed | |||||||||
| C2E3 | LD A,($5B21) | Fetch PreviousVerticalSpeed. | ||||||||
| C2E6 | AND A | Jump to ClearSpeed if the player was rising. | ||||||||
| C2E7 | JP P,ClearSpeed | |||||||||
| C2EA | RES 3,(IX+$0C) | Clear the jumping flag. | ||||||||
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Continue on to ClearSpeed.
View the equivalent code in;
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| Prev: C25E | Up: Map | Next: C2EE |