Category: <b>DOS kernel</b>
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<pre><b>INT 21 - European MS-DOS 4.0 - SET SIGNAL HANDLER</b>

	AH = 8Ch
	AL = signal number (see <a href=../../it/93/17.html>#01793</a>)
	BL = action (see <a href=../../it/94/17.html>#01794</a>)
	DS:DX -&gt; signal handler (see <a href=../../it/95/17.html>#01795</a>)
Return: CF clear if successful
	    AL = previous action
	    ES:BX -&gt; previous signal handler
	CF set on error
	    AX = error code (01h,invalid SigNumber or Action)
		  (see <a href=../../it/80/16.html>#01680</a> at AH=59h/BX=0000h)
Desc:	set the routine which will be invoked on a number of exceptional
	  conditions
Note:	all signals will be sent to the most recently installed handler
SeeAlso: AH=8Dh

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