83Plus:BCALLs:40AB

Synopsis

Official Name: LnX

BCALL Address: 40AB

Computes the natural log of OP1 and returns the result in OP1.

Inputs

• OP1 = floating point

Outputs

• OP1 = natural log of OP1

Destroys

• AF, BC, DE, HL
• OP1-OP4
• OP5 - ? Doesn't look like it but the SDK does claim OP5 is destroyed.

Example

B_CALL OP1Set3  ;OP1=floating point 3
B_CALL LnX  ;returns with OP1=1.0986122886681