Routines
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6188: Controls: Kempston Joystick
Used by the routines at ReadInputLR, ReadInputBrake and ReadInputAccelerate.
Reads the Kempston joystick. The bits are flipped so that, as with the keyboard routines, a direction which is pressed is a reset bit: bit 0 is right, bit 1 is left, bit 2 is down (brake) and bit 3 is up (accelerate).
Output
A Joystick controls
ReadKempstonJoystick 6188 IN A,($1F) Read the Kempston joystick (port 1F) into A.
618A CPL Flip the bits.
618B RET Return.
View the equivalent code in;
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