Appendix B Minimodule Isa Board; Introduction; What Is Pci-104; Figure B-1. Minimodule Isa Expansion Board (Top/Bottom View) - Ampro ReadyBoar 800 Reference Manual

Appendix B MiniModule ISA Board

Introduction

This Appendix describes the MiniModule ISA expansion board and how it is used with the ReadyBoard
800 to provide ISA bus signals to any PC/104 compatible expansion boards stacked onto the
ReadyBoard 800. The MiniModule ISA expansion board mates to the ReadyBoard 800's PCI-104
connector (32-bit PCI bus) where it provides the necessary signals through a PCI-to-ISA bridge
conversion for the PC/104 compatible expansion boards. The necessary Serial IRQs signals are
provided through the PCI-104 connector at pin-31 (B-1).

What is PCI-104?

PCI-104 is the terminology used for the PCI-only (32-bit PCI bus) specification within the PC/104
product family. PCI-104 eliminates the need for the ISA bus (PC/104 and its 104-pin connector),
retaining only the 120-pin connector for PCI and PC/104-Plus. The MiniModule ISA expansion board
provides the ISA support through the PCI-104 connector and the PCI-to-ISA bridge located on the
board.
PC/104 Bus (J1)
J1
X1
14.318 MHz Crystal (X1)
PCI-to-ISA Bridge (U1)

Figure B-1. MiniModule ISA Expansion Board (Top/Bottom view)

ReadyBoard 800
Top View
P1
Reference Manual
P1
PCI-104 (P1)
(120-pin)
Bottom View
U1
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