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32 lines
1.5 KiB
Plaintext
32 lines
1.5 KiB
Plaintext
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sticks - Atari 2600 Joystick Functions for C02
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This library contains a function for reading the joysticks:
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res = getstk(cntrlr); Reads the state of the specified joystick.
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The joystick to be read is specified by
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the argument cntrlr:
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0 = Left Joystick
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1 = Right Joystick
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Returns a byte comprised of the bits:
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Bit Hex Dec Control
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0 $01 1 Up
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1 $02 2 Down
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2 $03 4 Left
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3 $04 8 Right
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7 $05 128 Trigger
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A 1 in a bit means that the direction
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or trigger is pressed, so the function
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will return 0 if they joystick is
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centered and the trigger is not pressed.
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This is the reverse of the raw bits from
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the hardware ports.
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Note: The raw bits for the left joystick
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are stored in TEMP0, while the raw bits
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for the right joystick are stored in TEMP1.
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