Specifications

Hardware Configuration
2–39
Table 2-28 J6 Mating Connector
2.13 ETHERNET NETWORK INTERFACE
This section describes how to configure and connect the Ethernet LAN interface.
There are no jumpers to set on the Ethernet interface, and no hardware configuration, other than
connecting the network cable to an appropriate connector. Software configuration of the Ethernet
interface includes the following steps (mentioned briefly here, and covered in detail in Chapter 3):
! In SETUP, enable the Ethernet interface.
! In SETUP, select the I/O address block. The interface uses a 16-byte block of I/O addresses
starting at 300h, 320h (the default), 360h, or 380h.
! In SETUP, select the Ethernet media you will be using. Select the twisted pair interface if you
want to connect a twisted pair cable to the RJ45 connector. Select the AUI interface if you want
to attach an external transceiver or Media Attachment Unit (MAU) and run on a different
medium, such as thick coax or thin coax.
! In SETUP, select an IRQ. The interface can use either IRQ3, IRQ9 (the default), IRQ10, or
IRQ11. Choose an unused interrupt, as interrupt sharing is not implemented for this interface.
Note
IRQ11 is the default interrupt selection for the SCSI-II
interface. Only select IRQ11 if you do not have it enabled for
the SCSI interface using jumper W12.
Note
IRQ3 is the default interrupt for serial 2 and an option for
serial 4. Only select IRQ3 if these serial ports are not using it.
! If you plan to boot from the network (that is, if you plan to use the Little Board/486i as a diskless
peripheral or workstation), set up the boot PROM. See the section, “Setting up a Boot PROM”,
below, for details.
! Install the proper driver for the network operating system you will be running. Normally this is
done by adding a DEVICE= entry in the CONFIG.SYS file. This is covered in detail in
Chapter 3.
2.13.1 Setting up a Boot PROM
If you plan to boot from the network, you must provide a boot ROM program compatible with your
network operating system. You install this program in the Expansion BIOS ROM, a Flash EPROM
device provided on the board. Complete details are provided in Chapter 3. Briefly, these are the
steps you take: