Joystick interface dk'tronics

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Interface type: Kempston and sinclair joystick interface
Manufacturer: dk'tronics (UK)
Year:
Compatible with:
            Kempston port compatible with all models
            Sinclair port doesn't work with spectrum +2A/B and spectrum +3
Notes:
            The left port simulates 6,7,8,9 & 0 keys (sinclair) and the right port simulates IN(31) command (kempston).