83:ROMCalls:40B6

Synopsis

Official Name: InvOP1S

Call Address: 40B6

This routine inverts the sign of OP1.

Inputs

• OP1 = floating point number

Outputs

• OP1 = -OP1
• A = (OP1) = OP1 sign byte
• F = nc, nz if OP1 is negative, z if positive
• BC,DE,HL preserved