Difference between revisions of "83:ROMCalls:40B6"
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=== Outputs === | === Outputs === | ||
* OP1 = -OP1 | * OP1 = -OP1 | ||
| − | * A = ([[83:RAM:8039|OP1) | + | * A = ([[83:RAM:8039|OP1]]) = OP1 sign byte |
* F = nc, nz if OP1 is negative, z if positive | * F = nc, nz if OP1 is negative, z if positive | ||
* BC,DE,HL preserved | * BC,DE,HL preserved | ||
Latest revision as of 10:00, 14 April 2005
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
