Difference between revisions of "84PCE:Syscalls:021D4C"
From WikiTI
(→Destroys) |
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| Line 9: | Line 9: | ||
=== Inputs === | === Inputs === | ||
| − | DE | + | * DE: value |
=== Outputs === | === Outputs === | ||
| − | Z flag set if DE == 0 | + | * Z flag set if DE == 0 |
| − | + | * A holds upper byte of DE | |
| − | A holds upper byte of DE | + | |
=== Destroys === | === Destroys === | ||
* AF | * AF | ||
Revision as of 12:20, 26 May 2015
Contents
Synopsis
Hypothesized Official Name: ChkDEis0
Syscall Address: 021D4Ch
Checks if the 24-bit value in DE is 0.
Inputs
- DE: value
Outputs
- Z flag set if DE == 0
- A holds upper byte of DE
Destroys
- AF
