OS_UpCall 4 (changes)
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OS SWI Calls
» OS_UpCall
» OS_UpCall 4
OS_UpCall 4
(SWI &33)
| Entry | |
|---|---|
| R0 | 4 |
| Exit | |
|---|---|
| R0 | Preserved |
Use
The purpose of this call is to call inform your application that a missing filing medium has been supplied, or that an operation involving one has been cancelled.
Notes
It is always preceded by call(s) of OS_UpCall 1 or OS_UpCall 2. This call is typically used to remove error messages displayed when OS_UpCall 1 or 2 was first generated.
See also
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