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Routines |
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Used by the routine at ReadInput.
Reads the Kempston joystick port. The bits are inverted so that a pressed direction or fire button reads as a clear bit, in the same way as the keyboard controls.
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| ReadKempstonJoystick | 75CC | IN A,($1F) | Read the joystick from the Kempston port. | |||||
| 75CE | CPL | Flip the bits. | ||||||
| 75CF | RET | Return. | ||||||
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View the equivalent code in;
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