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Routines |
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Used by the routine at 37596. Returns with the zero flag reset if ENTER or the fire button on the joystick is being pressed.
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| 37687 | LD A,(33881) | Pick up the Kempston joystick indicator from 33881 | ||
| 37690 | OR A | Is the joystick connected? | ||
| 37691 | JR Z,37698 | Jump if not | ||
| 37693 | IN A,(31) | Collect input from the joystick | ||
| 37695 | BIT 4,A | Is the fire button being pressed? | ||
| 37697 | RET NZ | Return (with the zero flag reset) if so | ||
| 37698 | LD BC,49150 | Read keys H-J-K-L-ENTER | ||
| 37701 | IN A,(C) | |||
| 37703 | AND 1 | Keep only bit 0 of the result (ENTER) | ||
| 37705 | CP 1 | Reset the zero flag if ENTER is being pressed | ||
| 37707 | RET | |||
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