Difference between revisions of "84PCE:Syscalls:021D4C"
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| − | [[Category:84PCE:Syscalls:By Name| | + | [[Category:84PCE:Syscalls:By Name|ChkDEIs0]] |
| − | [[Category:84PCE:Syscalls:By Address|021D4C - | + | [[Category:84PCE:Syscalls:By Address|021D4C - ChkDEIs0]] |
== Synopsis == | == Synopsis == | ||
| − | '''Hypothesized Official Name:''' | + | '''Hypothesized Official Name:''' ChkDEIs0 |
'''Syscall Address:''' 021D4Ch | '''Syscall Address:''' 021D4Ch | ||
| 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 | ||
Latest revision as of 12:38, 31 May 2016
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
