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Appendix I Compaq/Intel Network Interface Controller Adapters
Compaq Personal Computers
Original - December 2000
I-6
I.4 ADAPTER PROGRAMMING
Programming the adapter consists of configuration, which occurs during POST, and control, which
occurs at runtime.
I.4.1 CONFIGURATION
The adapter’s 82559 or 82550 NIC controller is a PCI device and configured though PCI
configuration space registers using PCI protocol described in chapter 4 of this guide. The PCI
configuration registers are listed in the following table:
Table I-1. NIC Controller PCI Configuration Registers
Table I-1.
PCI Configuration Registers
PCI
Conf.
Addr. Register
Value
on
Reset
PCI
Conf.
Addr. Register
Value
on
Reset
00-01h Vender ID 8086h 10-13h Cntrl. Reg. Base Addr. (Mem) 0000h
02-03h Device ID 1229h 14-17h Cntrl. Reg. Base Addr. (I/O) 00h
04-05h PCI Command 0000h 18-1Bh Flash Mem. Base Addr. 00h
06-07h PCI Status 0280h 2C-2Dh Subsystem Vender ID
08h Revision ID xxh 2E-2Fh Subsystem ID
09-0Bh Class Code 01h 30-33h Expansion ROM Base Addr.
0Ch Cache Line Size 01h 34h Cap-Ptr
0Dh Latency Timer 04h 3C-3D Interrupt Line/Pin
0Eh Header Type 00h 3E-3Fh Min Gnt/Max Lat
0Fh BIST 00h DC-E3h Power Mgmt. Functions
NOTE:
Assume unmarked gaps are reserved and/or not used.
I.4.2 CONTROL
The adapter’s 82559 or 82550 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 I-2. NIC Control Registers
Table G-2.
Control Registers
Offset
Addr. / Register
No. of
Bytes
Offset
Addr. / Register
No. of
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).