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8 21555 PCI-to-PCI Bridge Evaluation Board User’s Guide

Introduction

1.4 Switch Settings

Figure 2 shows the three initialization switch packs, and Table 1 on page 9 gives a high-level

description of each switch. The switches are read at DE1B55503 power up. Further details on the

operation of these switches can be found in Chapter 3, “Optional Configurations”. The switches are

in dual-in-line (DIP) packs designated J9, J20, and J21. Each switch pack contains SW1 through

SW5.

Figure 2. Switches

A8409-01

J20

J21

OPTIONAL SLOT

Initialization

Switches

SLOT 1

J4 J6 J2

21555

1 2 3 4 5

J102

J101

SLOT 2

L1+

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 25 26

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Intel Computer Hardware 21555 Manuale Utente Pagina 8