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Routines |
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Finds out if the player is far enough through the wall on the side of low x, which is when the whole of it is beyond the limit. If it is, the player is put at the opposite side of the next room.
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Return unless the player is through the wall.
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| TestPassageAlongMinusX | C843 | POP HL | Restore the limits of the room from the stack. | |||||||
| C844 | LD A,$80 | Set A to 80, the middle of the room. | ||||||||
| C846 | SUB L | Take the limit along x away from it, to get the position of the wall. | ||||||||
| C847 | LD L,A | Set the position of the wall in L. | ||||||||
| C848 | LD A,(IY+$01) | Fetch the x position of the player. | ||||||||
| C84B | ADD A,(IY+$04) | Add the half size along x. | ||||||||
| C84E | CP L | Return if the player is not through the wall. | ||||||||
| C84F | RET NC | |||||||||
| C850 | LD (IY+$01),$00 | Put the player at the lowest x position, ready for the next room. | ||||||||
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This entry point is used by the routines at TestPassageAlongPlusX, TestPassageAlongPlusY and TestPassageAlongMinusY.
Save the player and build the next room.
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| TestPassageAlongMinusX_Done | C854 | LD A,(IX+$08) | Set the room of the player to the room of the door. | |||||||
| C857 | LD (IY+$08),A | |||||||||
| C85A | LD A,(IY+$0C) | Fetch the collision flags of the player. | ||||||||
| C85D | OR %00110000 | Set the countdown from entering the room to three. | ||||||||
| C85F | LD (IY+$0C),A | Set them. | ||||||||
| C862 | PUSH IY | Take the first object record, using the stack. | ||||||||
| C864 | POP HL | |||||||||
| C865 | LD DE,$C3FF | Take the records of the player to start from, PlayerRecords. | ||||||||
| C868 | LD BC,$0040 | Set the number of bytes to copy in BC to 40, which is two records. | ||||||||
| C86B | LDIR | Save the records of the player. | ||||||||
| C86D | INC SP | Throw away the two return addresses on the stack. | ||||||||
| C86E | INC SP | |||||||||
| C86F | INC SP | |||||||||
| C870 | INC SP | |||||||||
| C871 | JP RunGame_NewRoom | Jump to RunGame_NewRoom to build the next room. | ||||||||
| Prev: C83B | Up: Map | Next: C874 |