| Function | Address | Description |
|---|---|---|
| DOS_SET_ACCESS | 0145 | Change access mode of an open file |
Synopsys
Try to change the access mode of an open file.
This routine will fail if the file is already open, in an incompatible access mode, or if write access is required for a read-only file or disk.
Entry Parameters
| Register | Content |
|---|---|
| B | File number 0…15 |
| C |
Access mode required: Bits 0…2: 1 = exclusive read 2 = exclusive write 3 = exclusive read/write 5 = shared read Bits 3…7 =0 as reserved |
Exit Parameters
- If OK
- Carry true
- A corrupt
- Otherwise:
- Carry false
- A = Error code
- Always:
- BC DE HL IX corrupt, all other registers preserved.