please dont rip this site
Function  44h   I/O Control for Devices (IOCTL)  Get or Set Device Information

entry   AH      44h 

	AL	07h	Get Output Handle Status

			return  AL      00h     not ready 

			                0FFh    ready 



note: for DOS 2.x, files are always ready for output
file: /Techref/int/21f/44sf/07.htm, 0KB, , updated: 1999/4/26 11:36, local time: 2024/11/12 14:31,
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