Switch 2/5: 8/16-bit mode

You can install the Smart 16/4 Fiber AT Ringnode into either 8- or 16-bit bus slots. If you want to put it in a 16-bit slot, but you need an 8-bit transfer mode, set switch 2/5 to OFF.

Switch 2/5 Mode

ON (Default) 8/16-bit mode

OFF Force 8-bit mode

You must use 16-bit mode if you are installing the Ringnode in a Novell NetWare 4.x or 3.x server.

The following table summarizes the types of data transfer associated with different combinations of switches 2/4 and 2/5, and with the Ringnode in an 8- or 16-bit expansion slot:

Switch settings 8-bit slot 8-bit slot 16-bit slot 16-bit slot

Switch 2/4 setting ON OFF ON OFF

Switch 2/5 ON c c a b

Switch 2/5 OFF c c c c

Types of data transfer associated with different settings of switches 2/4 and 2/5

a = 16-bit bus master DMA

b = 16-bit I/O transfer

c = 8-bit I/O transfer

Switch 2/5	Mode
ON (Default)	8/16-bit mode
OFF	Force 8-bit mode

Switch settings	8-bit slot	8-bit slot	16-bit slot	16-bit slot
Switch 2/4 setting	ON	OFF	ON	OFF
Switch 2/5 ON	c	c	a	b
Switch 2/5 OFF	c	c	c	c

a	=	16-bit bus master DMA
b	=	16-bit I/O transfer
c	=	8-bit I/O transfer