Difference between revisions of "84PCE:Syscalls:021D48"
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| − | [[Category:84PCE:Syscalls:By Name| | + | [[Category:84PCE:Syscalls:By Name|ChkBCIs0]] |
| − | [[Category:84PCE:Syscalls:By Address|021D48 - | + | [[Category:84PCE:Syscalls:By Address|021D48 - ChkBCIs0]] |
== Synopsis == | == Synopsis == | ||
| − | '''Hypothesized Official Name:''' | + | '''Hypothesized Official Name:''' ChkBCIs0 |
'''Syscall Address:''' 021D48h | '''Syscall Address:''' 021D48h | ||
| Line 9: | Line 9: | ||
=== Inputs === | === Inputs === | ||
| − | BC | + | * BC: value |
=== Outputs === | === Outputs === | ||
| − | Z flag set if BC == 0 | + | * Z flag set if BC == 0 |
| − | + | * A holds upper byte of BC | |
| − | A holds upper byte of BC | + | |
=== Destroys === | === Destroys === | ||
* AF | * AF | ||
Latest revision as of 11:38, 31 May 2016
Contents
Synopsis
Hypothesized Official Name: ChkBCIs0
Syscall Address: 021D48h
Checks if the 24-bit value in BC is 0.
Inputs
- BC: value
Outputs
- Z flag set if BC == 0
- A holds upper byte of BC
Destroys
- AF
