Table of Contents
Note: This API call is for DOS personality only. Use Family API for portability.
Int 21H, AH=44H, AL=04H
Version
2 and higher
Brief
READ FROM BLOCK DEVICE CONTROL CHANNEL
Family API
Input
AX = 4404h BL = drive number (00h = default, 01h = A:, etc.) CX = number of bytes to read DS:DX -> buffer
Return
CF clear if successful
AX = number of bytes actually read 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 this function was not supported by Digital Research's DOS Plus
See also
AX=4402h“DOS 2+”,AX=4405h“DOS”,INT 2F/AX=122Bh
Note
Text based on Ralf Brown Interrupt List Release 61