Int 21/AX=4407h

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DOS 2+ - IOCTL - GET OUTPUT STATUS

AX = 4407h
BX = file handle

Return:
CF clear if successful AL = input status 00h not ready FFh ready CF set on error AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)

Notes: For DOS 2+, files are always ready for output, even if the disk is full or no media is in the drive. This function was not supported by Digital Research's DOS Plus

See Also: AX=4406h - INT 2F/AX=122Bh

Category: DOS Kernel - Int 21h - D

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