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Routines |
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Used by the routine at F5CE. If the character is standing next to a light switch, this routine makes him flip the switch off (if it's on and affects the lights in more than one window or window-pair), or consider flipping the switch on (if it's off and affects the lights in only one window or window-pair).
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| F4E6 | CALL $F436 | Is the character standing next to a light switch? | ||||||
| F4E9 | RET Z | Return if not | ||||||
| F4EA | BIT 5,A | Reset the zero flag if the light switch affects the lights in more than one window or window-pair | ||||||
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This entry point is used by the routine at F5A0.
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| F4EC | LD A,(BC) | A=window flags | ||||||
| F4ED | JR NZ,$F4F5 | Jump if the light switch affects the lights in more than one window or window-pair | ||||||
| F4EF | BIT 5,A | Is the light switch in the 'on' position? | ||||||
| F4F1 | RET Z | Return if so | ||||||
| F4F2 | JP $F491 | Flip the light switch on 109 times out of 256 | ||||||
| F4F5 | BIT 5,A | Is the light switch in the 'off' position? | ||||||
| F4F7 | RET NZ | Return if so | ||||||
| F4F8 | JP $F4A6 | Flip the light switch off | ||||||
| Prev: F485 | Up: Map | Next: F4FB |