Bitfields for OPTi 82C750 Vendetta (device 1) interrupt trigger control:
Bit(s)	Description	)
 15	reserved (1)
 14	reserved
 13	pin AD15 functionality (0 = DACK2#, 1 = GPCS2#)
 12-11	reserved
 10	IRQ3 triggering (0 = edge, 1 = level)
 9	IRQ4 triggering (0 = edge, 1 = level)
 8	IRQ7 triggering (0 = edge, 1 = level)
 7-6	IRQ generation when PIRQ3# triggered
	00 = disable
	01 = IRQ3
	10 = IRQ4
	11 = IRQ7
 5-4	IRQ generation when PIRQ2# triggered
	00 = disable
	01 = IRQ3
	10 = IRQ4
	11 = IRQ7
 3-2	IRQ generation when PIRQ1# triggered
	00 = disable
	01 = IRQ3
	10 = IRQ4
	11 = IRQ7
 1-0	IRQ generation when PIRQ0# triggered
	00 = disable
	01 = IRQ3
	10 = IRQ4
	11 = IRQ7
SeeAlso: #00939,#00950