Category: <b>runtime support</b>
<p>
<pre><b>INT D4 - STSC APL*PLUS/PC - MAY BE USED IN FUTURE RELEASES</b>

--------O-D400
INT D4 O - PC-MOS/386 v5.01 - OBSOLETE FUNCTIONS
	AH = 00h and 01h
Return: nothing
Desc:	PC-MOS/386 v5.01 reports that these functions are no longer supported
	  and enters an endless loop
Program: PC-MOS/386 is a multitasking/multiuser MS-DOS-compatible operating
	  system by The Software Link, Inc.
</pre>