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Elite on the BBC Micro

Maths (Arithmetic): MLS2 [Disc version, Flight]

Name: MLS2 [Show more] Type: Subroutine Category: Maths (Arithmetic) Summary: Calculate (S R) = XX(1 0) and (A P) = A * ALP1
Context: See this subroutine in context in the source code Variations: See code variations for this subroutine in the different versions References: This subroutine is called as follows: * STARS1 calls MLS2 * STARS6 calls MLS2

Calculate the following: (S R) = XX(1 0) (A P) = A * ALP1 where ALP1 is the magnitude of the current roll angle alpha, in the range 0-31.
.MLS2 LDX XX \ Set (S R) = XX(1 0), starting with the low bytes STX R LDX XX+1 \ And then doing the high bytes STX S \ Fall through into MLS1 to calculate (A P) = A * ALP1