Category: <b>DOS-based task switchers/multitaskers</b>
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<pre><b>INT 15 - MultiDOS Plus - UNMAP IRQ</b>

	AH = 18h
	AL = IRQ to unmap (01h-0Fh)
Return: AX = status
	    0000h successful
	    0001h invalid IRQ
Note:	results are unpredictable if the IRQ has not been mapped
SeeAlso: AH=17h"MultiDOS",AH=19h"MultiDOS"
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