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Routines |
| Prev: 26572 | Up: Map | Next: 26621 |
| 26584 | LD HL,23611 | Prepare HL in case we return to 26426 | ||
| 26587 | LD A,(26655) | A=107 ('k') if the Kempston joystick is being used, 0 otherwise | ||
| 26590 | AND A | Is the Kempston joystick being used? | ||
| 26591 | RET Z | Return if not | ||
| 26592 | IN A,(31) | Collect input from the joystick | ||
| 26594 | AND 31 | Check bits 0-4 | ||
| 26596 | RET Z | Return with the zero flag set if there was no input | ||
| 26597 | POP HL | Drop the return address from the stack so we return straight to the caller of 26426 | ||
| 26598 | LD L,A | L=input from the joystick | ||
| 26599 | BIT 4,L | |||
| 26601 | LD A,102 | 102='f' (fire catapult) | ||
| 26603 | RET NZ | Return if the fire button was pressed | ||
| 26604 | LD A,81 | 81='Q' (up) | ||
| 26606 | BIT 3,L | |||
| 26608 | RET NZ | Return if the joystick was moved up | ||
| 26609 | DEC A | A=80: 'P' (right) | ||
| 26610 | BIT 0,L | |||
| 26612 | RET NZ | Return if the joystick was moved right | ||
| 26613 | DEC A | A=79: 'O' (left) | ||
| 26614 | BIT 1,L | |||
| 26616 | RET NZ | Return if the joystick was moved left | ||
| 26617 | LD A,65 | 65='A' (down) | ||
| 26619 | AND A | Reset the zero flag | ||
| 26620 | RET | |||
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