Compaq W4000 manual NIC Programming, Configuration, NIC Control Registers

Technical Reference Guide

5.9.4 NIC PROGRAMMING

Programming the NIC consists of configuration, which occurs during POST, and control, which occurs at runtime.

5.9.4.1 Configuration

The network interface function is a PCI device and configured though PCI configuration space registers using PCI protocol described in chapter 4. The PCI configuration registers are listed in the following table:

Table 5–25. NIC Controller PCI Configuration Registers

Table 5-25.

NIC Controller PCI Configuration Registers (ICH2 Device 8/Function 0)

PCI		Value on	PCI		Value
Conf.		Reset	Conf.		on
Addr.	Register		Addr.	Register	Reset
00-01h	Vender ID	8086h	2E, 2Fh	Subsystem ID	0000h
02-03h	Device ID	2449h	34h	Capabilities Pointer	DCh
04-05h	PCI Command	0000h	3Ch	Interrupt Line	00h
06-07h	PCI Status	0290h	3Dh	Interrupt Pin	01h
08h	Revision ID	Xxh	3Eh	Min. Grant	08h
09-0Bh	Class Code	0002h	3E, 3Fh	Max. Latency	38h
0Dh	Latency Timer	00h	DCh	Capability ID	01h
0Eh	Header Type	00h	DDh	Next Item Pointer	00h
10-13h	Cntrl. Reg. Base Addr. (Mem)	8	DE, DFh	Pwr. Mgmt. Functions	FE21h
14-17h	Cntrl. Reg. Base Addr. (I/O)	1	E0, E1h	Pwr. Mgmt. Cntrl./Sts	0000h
2C, 2Dh	Subsystem Vender ID	0000h	E3h	Data	--

NOTE:

Assume unmarked gaps are reserved and/or not used.

5.9.4.2 Control

The 82562 controller is controlled though registers that may be mapped in system memory space or variable I/O space. The registers are listed in the following table:

Table 5–26. NIC Control Registers

Table 5-26.

NIC Control Registers

Offset		No. of	Offset		No. of
Addr. / Register		Bytes	Addr. / Register		Bytes
00h	SCB Status	2	19h	Flow Control Register	2
02h	SCB Command	2	1Bh	PMDR	1
04h	SCB General Pointer	4	1Ch	General Control	1
08h	PORT	4	1Dh	General Status	1
0Ch	Flash Control Reg.	2	1E-2Fh Reserved		10
0Eh	EEPROM Control Reg.	2	30h	Function Event Register	4
10h	Mgmt. Data I/F Cntrl. Reg.	4	34h	Function Event Mask Register	4
14h	Rx Direct Mem. Access Byte Cnt.	4	38h	Function Present State Register	4
18h	Early Receive Interrupt	1	20h	Force Event Register	4

Not implemented in these systems (CardBus registers).

Compaq Evo and Workstation Personal Computers5-35

Featuring the Intel Pentium 4 Processor

Second Edition - January 2003