OS_GBPB 1 (changes)
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OS SWI Calls
» OS_GBPB
» OS_GBPB 1
OS_ GBPB 1
(SWI &0C)
| Entry | |
|---|---|
| R0 | 1 |
| R1 | File handle |
| R2 | Buffer |
| R3 | Bytes to write |
| R4 | File pointer |
| Exit | |
|---|---|
| R0 | Preserved |
| R1 | Preserved |
| R2 | Pointer after end of data |
| R3 | Number of bytes not transferred |
| R4 | New file pointer |
| C flag is clear | |
Use
The purpose of this call is to write bytes to an open file at a given pointer.
Notes
The ‘EOF-error-on-next-read’ flag is cleared.
Error is generated if invalid file handle, directory, or no write access.
OS_GBPB 2 writes bytes to an open file, but only at the current file pointer.
See also
Other languages documentation
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