Compatibility: 2.0+

Expects: AX    4407H

BX    file handle  (device or disk file)

Returns: AX    error code  if CF is set to CY

AL    output status code (if no error)

00H: not ready

ffH: ready

Info: This function checks to see if a device is ready to receive

output.

If the handle is a disk file:

AL always returns with ffH (ready) even if the disk is full or

no diskette is present etc.

If the handle is a device:

AL=00H the device is not ready

AL=ffH the device is ready (output will be accepted)

Notes:   This fn makes for a simple way to determine if an output

device, such as a COM port, is ready to accept output.  It is

not useful for disk files.

See Also: Fn 44H (IOCTL)

Fn 4406H (Query Handle Input Status)

DOS Functions

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