.joys6 \ By this point, Y contains the scale factor to apply to \ the steering, which is one of the following values: \ \ * 181 for a scale factor of 1.00 \ \ * 195 for a scale factor of 1.16 \ \ * 220 for a scale factor of 1.48 TYA \ Set A = Y \ \ So A is 181, 195 or 220 JSR Multiply8x8 \ Set (A T) = A * U \ = A * x-axis STA U \ Set U = A \ = high byte of A * x-axis JSR Multiply8x8 \ Set (A T) = A * U \ = A * A \ = (A * x-axis) ^ 2 ASL T \ Set (A T) = (A T) * 2 ROL A \ = 2 * (A * x-axis) ^ 2 \ So for A = 220 we have: \ \ (A T) = 2 * (220/256 * x-axis) ^ 2 \ = 2 * (0.859 * x-axis) ^ 2 \ = 1.48 * x-axis ^ 2 \ \ and for A = 195 we have: \ \ (A T) = 2 * (195/256 * x-axis) ^ 2 \ = 2 * (0.762 * x-axis) ^ 2 \ = 1.16 * x-axis ^ 2 \ \ and for A = 181 we have: \ \ (A T) = 2 * (181/256 * x-axis) ^ 2 \ = 2 * (0.707 * x-axis) ^ 2 \ = 1.00 * x-axis ^ 2 RTS \ Return from the subroutineName: HookJoystick (Part 3 of 3) [Show more] Type: Subroutine Category: Extra tracks Summary: Apply enhanced joystick steering to specific track sections Deep dive: Secrets of the extra tracks Code hooks in the extra tracksContext: See this subroutine in context in the source code References: No direct references to this subroutine in this source file
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Configuration variable Multiply8x8 = &0C00
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Configuration variable T = &0074
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Configuration variable U = &0075