Specifications

Little Board/P5i Technical Manual
2–42
2.12.1 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:
 In SETUP, enable S1, the Expansion BIOS ROM.
 Remove jumper W9 and install jumper W13 to write-enable the Flash device.
 Program your boot PROM code using a utility called PGMP5I.COM, supplied by Ampro on the
utility disk that comes with the Little Board/P5i Development Kit.
2.12.2 Connecting to the Ethernet Cable
The Ethernet interface supports two Ethernet media, 10BaseT (twisted pair) and the AUI interface. The
interface connectors are described in this section.
Ampro supplies an optional transition cable assembly that plugs into the AUI connector. The AUI
interface cable provides a female DB-15 connector. Contact Ampro for information on ordering this
cable.
Twisted Pair Interface (J7)
The twisted pair interface (10BaseT) appears on connector J7. It is a standard RJ45 telephone-type
modular connector, which is the normal connector used with standard twisted-pair cables. If you are
using the twisted-pair interface, you must select it using SETUP. Details are provided in Chapter 3.
The following table lists the signals and pin numbers of J7:
Table 2–33 RJ45 Twisted Pair Connector (J7)
J7 Pin Function
1 + Transmit Data
2 - Transmit Data
3 + Receive Data
4 N/C
5 N/C
6 - Receive Data