en:docs:dos:api:int21:44:03

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

2018/09/07 07:04 · prokushev

Int 21H, AH=44H, AL=03H

Version

2 and higher

Brief

WRITE TO CHARACTER DEVICE CONTROL CHANNEL

Family API

Input

AX = 4403h
BX = file handle referencing character device
CX = number of bytes to write
DS:DX -> data to write

Return

CF clear if successful

    AX = number of bytes actually written
CF set on error
    AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)

Macro

Notes

format of data is driver-specific
  (also see separate entries below for some specific cases)
if the file handle refers to "4DOSSTAK", the 4DOS (v2.x-3.03)
  KEYSTACK.SYS driver will push the specified characters on the
  keyboard stack; similarly for "NDOSSTAK", the NDOS KEYSTACK.SYS
  driver will push the characters onto the keyboard stack
this function was not supported by Digital Research's DOS Plus

See also

AX=4400h,AX=4402h“DOS 2+”,AX=4405h“DOS”,INT 2F/AX=122Bh, INT 2F/AX=D44Dh,INT 2F/AX=D44Fh

Note


en/docs/dos/api/int21/44/03.txt · Last modified: 2021/05/01 13:07 by prokushev