This is an old revision of the document!
0
Brief
Input
- BX = file handle
Return
- CF clear if successful
- AX = new handle
- CF set on error
- AX = error code (04h,06h) (too many open files (no handles available), invalid handle)
Notes
moving file pointer for either handle will also move it for the other, because both will refer to the same system file table
for DOS versions prior to 3.3, file writes may be forced to disk by duplicating the file handle and closing the duplicate