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Kempston Joystick Interface: Difference between revisions
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Until the release of the +2 and +3, the Kempston joystick interface and its compatibles were the most common Joystick interfaces available to Speccy owners. | Until the release of the +2 and +3, the Kempston joystick interface and its compatibles were the most common Joystick interfaces available to Speccy owners. | ||
The original version also worked with the ZX-81, but joystick support in ZX81 games was much less common. | The original version also worked with the ZX-81, but joystick support in ZX81 games was much less common. | ||
The interface uses standards Atari-style joysticks. | |||
Port $1f | Port $1f | ||
| Line 32: | Line 33: | ||
|00010000 | |00010000 | ||
|Fire! | |Fire! | ||
|- | |||
|5 | |||
|00100000 | |||
| Very occasionally a second fire button on some clones, but usually 0 | |||
|- | |||
|6 | |||
|01000000 | |||
| Always 0 | |||
|- | |||
|7 | |||
|10000000 | |||
| Always 0 | |||
|} | |} | ||