Intel 21152 External PAL Arbitration Jumper Positions, Secondary Bus Arbitration, Description

Models: 21152

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Secondary Bus Arbitration

Table 4-2describes the operation of jumpers for external arbitration with PAL.

Table 4-2.	External PAL Arbitration Jumper Positions

	Jumper	Position	Description

	J7	Top	Selects the PAL as the source of secondary grants.

	W4	Right	Selects the board signal gt_out<4> (the external secondary grant to the
			21152) to drive the 21152 s_req_l<0> input.

	W1	Right	Ties s_cfn_l high, which disables the21152 internal arbiter and causes the
			following reconfigurations:
			Signal s_gnt_l<0> becomes the secondary bus request.
			Signal s_req_l<0> becomes the secondary bus grant.
			The PAL parks the secondary bus at the 21152.

21152 PCI-to-PCI Bridge Evaluation Board User’s Guide

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Contents

July 21152 PCI-to-PCI Bridge Evaluation BoardUser’s Guide 21152 PCI-to-PCI Bridge Evaluation Board User’s Guide Contents Tables Figures1.1 Overview 1.2 FeaturesIntroduction Introduction 1.3 Major ComponentsFigure 1-1. EB152 Major Components Viewed from Side1.5 Secondary Slot Numbering and IDSEL Mapping 1.4 JumpersJumper Connections Figure 1-2. Secondary PCI Slot NumberingFigure 1-3. EB152 with One Secondary Bus Option Card 1.6 Typical ConfigurationsFigure 1-4. EB152 with Two Secondary Bus Option Cards IntroductionFigure 1-6. Four PCI Buses in a Tri-Level Hierarchy Figure 1-5. Tri-Level with Two EB152sIntroduction EB152Page 2.1 Specifications Installation2.2 Hardware Requirements 2.3 Software RequirementsInstallation 2.4 Installation ProcedureInterrupt ORing Interrupt RoutingInterrupts from Devices to EB152 Fingers Interrupt RoutingSecondary Bus Arbitration Figure 4-1. Arbitration Jumpers Secondary Bus ArbitrationInternal Arbitration Jumper Positions Viewed from SideSecondary Bus Arbitration External PAL Arbitration Jumper PositionsJumper PositionPage Kit Contents Page http//developer.intel.com Support, Products, and Documentation