|
Routines |
| Prev: C89D | Up: Map | Next: C8BE |
|
Used by the routine at player_controls.
Two control schemes. Rotational control, the only one the keyboard has, uses left and right to turn a quarter at a time: see left_right_rotational. Directional control, which a joystick gets when option 5 on the menu is on (bit 3 of $5BA4), treats the stick as four compass points: pushing one turns the player towards it and, once facing it, walks that way.
In directional mode nothing happens during the room-entry walk or in the air -- bit 2 of +$0C, set by the collision code when a downward move is stopped, is what "standing on something" means here. Otherwise the stick is read in the order up (unless left is also held), right, down, left.
|
||||||||||
| handle_left_right | C89F | LD HL,$5BA4 | bits 1-2 of $5BA4 are the control method; 0, the keyboard, is always rotational | |||||||
| C8A2 | LD A,(HL) | |||||||||
| C8A3 | AND $06 | |||||||||
| C8A5 | JR Z,left_right_rotational | |||||||||
| C8A7 | BIT 3,(HL) | directional control switched off | ||||||||
| C8A9 | JR Z,left_right_rotational | |||||||||
| C8AB | LD A,(IX+$0C) | not during the room-entry walk | ||||||||
| C8AE | AND $F0 | |||||||||
| C8B0 | RET NZ | |||||||||
| C8B1 | BIT 2,(IX+$0C) | not in the air | ||||||||
| C8B5 | RET Z | |||||||||
| C8B6 | BIT 0,C | left pressed: skip the test for up; up: face N | ||||||||
| C8B8 | JR NZ,directional_pick | |||||||||
| C8BA | BIT 2,C | |||||||||
| C8BC | JR NZ,chk_facing_N | |||||||||
| Prev: C89D | Up: Map | Next: C8BE |