83Plus:BCALLs:4066

Synopsis

Official Name: Times2

BCALL Address: 4066

Doubles the floating point number in OP1.

Inputs

• OP1 = floating point number

Outputs

• OP1 = 2*OP1
• OP2 = original value of OP1

Registers Destroyed

• AF, BC, DE, HL

Comments

This is faster than loading OP2 with 2 and using FPmult.

Example

B_CALL OP1Set3  ;OP1=floating point 3
B_CALL Times2  ;returns with OP1=floating point 6