IRQL	= $3FE
IRQH	= $3FF

;--------------------------------------

SW_SLOTXROM_ENA = $C006
SW_SLOTXROM_DIS = $C007
SW_SLOTXROM_R = $C015	; Active low

SW_SLOT3ROM_DIS = $C00A
SW_SLOT3ROM_ENA = $C00B
SW_SLOT3ROM_R = $C017	; Active high