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OS_UpCall 11
Programmer's Reference Manuals
» Part 15 – SWI Calls
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» OS_UpCall 11
OS_UpCall 11
(SWI &33)
| Entry | |
|---|---|
| R0 | 11 (&0B) |
| R1 | Device driver’s handle |
| R2 | 0 if closed for reception (else code for transmission) |
| R3 | File handle for stream |
| R4 | DeviceFS? stream handle, as passed to device driver on initialisation |
| Exit | |
|---|---|
| R0 | Preserved |
| R1 | Preserved |
| R2 | Preserved |
| R3 | Preserved |
| R4 | Preserved |
Use
The purpose of this call is to call inform your application that a stream has been closed.
Notes
DeviceFS? issued this call when a stream is closed. It serves as a broadcast, and all registers should be preserved.
This call is never issued under RISC OS 2.