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1541

Category: BIOS

INT 15 - SYSTEM - WAIT ON EXTERNAL EVENT (CONVERTIBLE and some others)

	AH = 41h
	AL = condition type (see #00463)
	BH = condition compare or mask value
	BL = timeout value times 55 milliseconds
	    00h means no timeout
	DX = I/O port address if AL bit 4 set
	ES:DI -> user byte if AL bit 4 clear
Return: after event or timeout occurs
Note:	call AH=C0h and examine bit 3 of feature byte 1 to determine whether
	  this function is supported
SeeAlso: AH=83h,AH=86h,AH=C0h


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