Difference between revisions of "84PCE:Syscalls:021D4C"

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(Destroys)
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=== Destroys ===
 
=== Destroys ===
* A
+
* AF

Revision as of 09:26, 26 May 2015

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