Table of Contents
Note: This API call is for DOS personality only. Use Family API for portability.
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
Text based on Ralf Brown Interrupt List Release 61