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Routines |
Prev: 28736 | Up: Map | Next: 28812 |
ID | Door |
---|---|
1 | Left study door |
2 | Right study door |
4 | Science Lab storeroom door |
8 | Boys' skool door |
16 | Skool gate |
H | Character number (183-214) |
28767 | LD L,0 | Pick up the character's animatory state in A |
28769 | LD A,(HL) | |
28770 | RLCA | Set A=-1 if the character is facing left, 1 if facing right |
28771 | CCF | |
28772 | SBC A,A | |
28773 | ADD A,A | |
28774 | INC A | |
28775 | INC L | Byte 1 of the character's buffer holds his x-coordinate |
28776 | ADD A,(HL) | Add this to A |
28777 | LD E,A | Now E=x-coordinate of location directly in front of character |
28778 | INC L | L=2 |
28779 | LD D,(HL) | Pick up the character's y-coordinate in D |
28780 | PUSH HL | |
28781 | LD HL,47422 | 47422 is the address of the door location table |
28784 | LD BC,1281 | B=5, C=1 |
28787 | LD A,E | A=x-coordinate of location directly in front of character |
28788 | CP (HL) | Compare this with the x-coordinate of the door |
28789 | INC HL | |
28790 | JR NZ,28796 | Jump if the x-coordinates don't match |
28792 | LD A,D | A=y-coordinate of character |
28793 | CP (HL) | Do the y-coordinates match? |
28794 | JR Z,28804 | Jump if so (character is standing at this door) |
28796 | INC HL | |
28797 | RLC C | Move the set bit in C one place to the left |
28799 | DJNZ 28787 | Jump back to consider remaining doors |
28801 | POP HL | |
28802 | XOR A | Reset the carry flag: no door in front of character |
28803 | RET | |
The character is standing in front of a door.
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28804 | LD A,(32756) | Pick up the doors flags from 32756 |
28807 | AND C | Check the bit corresponding to the door |
28808 | POP HL | |
28809 | RET NZ | Return with the carry flag reset if the door is open |
28810 | SCF | Set the carry flag: door is closed |
28811 | RET |
Prev: 28736 | Up: Map | Next: 28812 |