83Plus:BCALLs:4084

Synopsis

Official Name: FPMult

BCALL Address: 4084

Multiplies the floating point number in OP1 by the floating point number in OP2 and stores the result in OP1.

Inputs

• OP1 = floating point number
• OP2 = floating point number

Outputs

• OP1 = OP1 * OP2

Registers Destroyed

• AF, BC, DE, HL, OP3
• Approx. TStates:
  • worst case
    • 11,000
  • if insignificant digits of op2 are filled with zeros
    • 3,000 (where op2 is a single digit number)

Example

B_CALL OP1Set3  ;OP1=floating point 3
B_CALL OP2Set2  ;OP2=floating point 2
B_CALL FPMult  ;returns with OP1=floating point 6