Register: 0x3C

Interrupt Line

Read/Write

7

0

IL

0

0

0

0

0

0

0

0

ILInterrupt Line[7:0]

This register is used to communicate interrupt line routing information. POST software writes the routing information into this register as it initiates and configures the system. The value in this register tells which input of the system interrupt controller(s) the device’s interrupt pin is connected to. Values in this register are specified by system architecture.

Register: 0x3D

Interrupt Pin

Read Only

7

0

IP

0

0

0

0

0

0

0

1

IPInterrupt Pin[7:0]

This register indicates which interrupt pin the device uses. Its value is set to 0x01, for the INTA/ signal.

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PCI Functional Description

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LSI 53C810A technical manual Register 0x3C, Register 0x3D, Interrupt Line Read/Write ILInterrupt Line70