Label: ＤＴＯＲ Function: Convert floating point degrees to floating point radians
Entry condition: The floating point degrees are in [R0].
Exit information: The converted floating point radians are still in [R0].
Affected resources: PSW, A, B, R2~R7, bits 1EH, 1FH Stack requirement: 6 bytes
DTOR: MOV R5,#0FBH; The coefficient (π/180) is transferred to the second work area
MOV R6,#8EH
MOV R7,#0FAH
DR: LCALL MVR0; Transfer [R0] to the first work area
CLR 1EH; The coefficient is positive
LCALL MUL1; Convert by multiplication
LJMP MOV0; The result is transferred to [R0]
END
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