Intel 740 User Manual

Intel740™ Graphics Accelerator Design Guide 3-1
3 Device AGP MotherBoard Design
3 Device AGP MotherBoard Design
3
3.1 Introduction
This chapter provides design guidelines for developing a 3 device AGP motherboard based on the
Pentium II
®
processor, Intel
®
440BX AGPset, and the Intel740™ graphics accelerator. The main
focus of this chapter is the guidelines for developing a 3-point AGP solution with the Intel740
graphics accelerator. The configuration for the 3-point AGP is to have an 82443BX (Target) with
two AGP masters.
•
One AGP master is located on the motherboard (Intel740 Graphics Accelerator) along with the
target, and
•
Another AGP master is located on an add-in card that connects to the motherboard through a
standard AGP connector.
Only one AGP master is enabled at any one time. When the add-in card is installed in the system,
the AGP master on the add-in card is the only one that may be enabled. The Intel740 graphics
accelerator on the motherboard may be enabled only when the add-in card is removed from the
system. The desire for a 3-point AGP solution is to allow an upgrade path from the master device
on the motherboard to a master device on an add-in card.
This section contains references to sections already discussed in the reference card section of this
design guide. Since the focus of this section is only the 3-point AGP implementation with the
Intel740 graphics accelerator, many of the layout and routing guidelines for the motherbaord are
referenced to the Intel
®
440BX AGPset Design Guide.
3.1.1 Overview
The reference 3 device AGP motherboard design described in this document contains the following
features.
•
Full support for a Pentium
®
II processor (DS1P), with system bus frequencies of 100/66 MHz
•
Intel 440BX AGPset
— 82443BX Host Bridge Controller
— 8237EB PCI ISA IDE Accelerator (PIIX4E)
•
100/66 Mhz Memory Interface: A wide range of DRAM support including
— 64-bit memory data interface plus 8 ECC bits and hardware scrubbing
— SDRAM (Synchronous) DRAM Support only for desktop and server applications
— 16Mbit, 64Mbit DRAM Technologies
•
2 PCI Add-in Slots
— PCI Specification Rev. 2.1 Compliant
•
1 Shared PCI/ISA Add-in Slot
•
1 AGP Slot
— AGP Interface Specification Rev 1.0 Compliant
— AGP 66/133 MHz, 3.3V device support

Intel 740 Specifications

General

Brand	Intel
Model	740
Category	Video Card
Language	English