en:docs:dos:api:int21:16

Note: This API call is for DOS personality only. Use Family API for portability.

2018/09/07 07:04 · prokushev

Int 21H, AH=16H

Version

1 and higher

Brief

CREATE OR TRUNCATE FILE USING FCB

Family API

Input

      AH = 16h
      DS:DX -> unopened FCB (see #01345), wildcards not allowed

Return

AL = status

          00h successful
          FFh directory full or file exists and is read-only or locked

Notes

Notes: if file already exists, it is truncated to zero length

      if an extended FCB is used, the file is given the attribute in the
        FCB; this is how to create a volume label in the disk's root dir
      not supported by MS Windows 3.0 DOSX.EXE DOS extender
      (FAT32 drive) this function will only succeed for creating a volume
        label; FAT32 does not support FCBs for file I/O
      

See also

AH=0Fh,AH=10h,AH=3Ch

Note

DOS API
Process manager INT 20H, INT 21H: 00H, 25H, 26H, 31H, 34H, 35H, 4CH, INT 22H, INT 27H, INT 28H
File manager INT 25H, INT 26H, INT 21H: 0DH, 0EH, 0FH, 10H, 11H, 12H, 13H, 14H, 15H, 16H, 17H, 19H, 1AH, 1BH, 1CH, 21H, 22H, 23H, 24H, 27H, 28H, 29H, 2EH, 2FH, 32H, 3305H, 36H, 39H, 3AH, 3BH
Character Device I/O INT 29H, INT 21H: 01H, 02H, 03H, 04H, 05H, 06H, 07H, 08H, 09H, 0AH, 0BH, 0AH, 0CH
Signals INT 23H, INT 24H, INT 21H: 3300H, 3301H, 3302H
Memory manager
Date and Time INT 21H: 2AH, 2BH, 2CH, 2DH
Misc INT 21H: 30H, 3306H, 3700H, 3701H, 3702H, 3703H
NLS INT 21H: 3303H, 3304H, 3800H, 3801H
2018/09/04 19:23 · prokushev

en/docs/dos/api/int21/16.txt · Last modified: 2020/12/08 09:10 by prokushev