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Elite on the BBC Micro

Maths (Arithmetic): DV41 (Disc version)

Name: DV41 [View in context] Type: Subroutine Category: Maths (Arithmetic) Summary: Calculate (P R) = 256 * DELTA / A
Calculate the following division and remainder: P = DELTA / A R = remainder as a fraction of A, where 1.0 = 255 Another way of saying the above is this: (P R) = 256 * DELTA / A This uses the same shift-and-subtract algorithm as TIS2, but this time we keep the remainder. Returns: C flag The C flag is cleared
.DV41 STA Q \ Store A in Q LDA DELTA \ Fetch the speed from DELTA into A