Microsoft KB Archive/102994
Article ID: 102994
Article Last Modified on 11/1/2006
- Microsoft Windows NT Advanced Server 3.1
- Microsoft Windows NT Workstation 3.1
- Microsoft Windows NT Advanced Server 3.1
This article was previously published under Q102994
The article contains REGISTRY Parameter Subkey entries for Network Adapter Cards. For information on these entries:
- NetRules Subkey
- Linkage Subkey Entries for Network Components
See the article "Network Adapter Cards Entries, Part 1" for information on other NAC entries.
Network Adapter Cards Entries
This section describes specific Registry entries related to network adapter cards and the drivers for network adapters. Windows NT supports network adapter drivers under the NDIS 3.0 specification (Network Device Interface Specification).
The CurrentControlSet\Services subkey for a network driver or adapter card includes the standard entries found in the Services subkeys, with the following default values:
Value Value Entry ErrorControl 0x1 (normal) Start 0x3 (load on demand) Type 0x1 or 0x4 (driver or adapter)
The following sections describe entries in the other areas of the Registry that contain configuration information for network adapter cards and their drivers, including:
- NetRules subkeys under HKEY_LOCAL_MACHINE\SOFTWARE for drivers and adapters. (In "Network Adapter Cards Entries, PART 1".)
- Linkage subkey entries under HKEY_LOCAL_MACHINE\SYSTEM for drivers and adapters, defining information about bindings for the component. (In "Network Adapter Cards Entries, PART 1".)
- Parameter subkey entries under HKEY_LOCAL_MACHINE\SYSTEM for network card adapters, defining specific information such as the IRQ number, I/O base address, and other details. (In this article.)
The information provided here is chiefly to be used for informational and troubleshooting purposes. The settings for either the NDIS driver or the network adapter card should be changed using the Network icon in Control Panel.
For information about Registry values for other network services, see the appropriate article in the "Network Services Entries" article series. Entries for TCP/IP that are specific to network adapter cards can be found under see the articles "TCP/IP Transport Entries" Part 1 and Part 2.
Parameters Subkey Entries
Each network adapter card has a Parameters subkey with value entries that contain the settings for interrupt number, I/O port, and other parameters. These entries are found under subkeys for specific adapter cards in this Registry path:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet \Services\adapter name#\Parameters
These values should all be set by choosing the Network icon in Control Panel. These value entries are provided here for informational purposes only. For a list of default values for network adapter card settings, see the table at the end of this section.
BusNumber REG_DWORD Number Defines the bus number, beginning with 0 in the common case where the computer has one bus type, whether it is ISA, EISA, MCA, or TurboChannel. For the rare computer that has more than one bus, bus number 2 has the value of 1, and so on. This value should be maintained by the system. You cannot change it using the Network dialog box in Control Panel. Default: Usually 0 (depends on the installation) BusType REG_DWORD Number Specifies the bus type for the computer, as in the following list: Value Bus type 0 MIPS (Jazz-Internal bus) 1 ISA bus 2 EISA bus 3 MCA bus 4 TcChannel bus This value should be maintained by the system. You cannot change it using the Network dialog box in Control Panel. CableType REG_DWORD 1 or 2 Specifies the cable type as unshielded twisted pair (UTP=1) or shielded twisted pair (NTSETUP=2), for Proteon 1390 adapter cards. CardSpeed REG_DWORD 4 or 16 megabits per second Specifies card speed as 4 or 16 megabits per second in hex (0x4 or 0x10), for Proteon 1390 adapter cards. CardType REG_DWORD Number Specifies the card installed in the system. For some manufacturers, all their network cards use the same driver, which checks the value of CardType to determine the network card model number of the installed card. For example: CardType Network card model number value DEC: 1 DEC100 2 DEC20x 3 DEC PC 4 DEC Station 5 DEC422 7 DEC101 Proteon: 1 Proteon 1390 2 Proteon 1990 Ungermann- Bass: 2 UB PC 3 UB EOTP 4 UBPS This value should be maintained by the system. You cannot change it using the Network dialog box in Control Panel. DMAChannel REG_DWORD 5, 6, or 7 Specifies the DMA channel used by the adapter card. InterruptNumber REG_DWORD IRQ number Specifies the interrupt level (IRQ) for the adapter card. IRQ5 is a common choice (0x5). IoBaseAddress REG_DWORD Number in hex For some adapters, this entry specifies the I/O port base address as a hexadecimal string. For other adapters, this entry specifies whether this is the primary adapter card (1) or a secondary card (2). MediaType REG_DWORD Number Specifies the network type, as follows: Value Network type 1 Ethernet 2 IBM Token Ring 3 ARCnet 4 FDDI network 5 Apple LocalTalk This value should be maintained by the system. You cannot change it using the Network dialog box in Control Panel. MaximumPacketSize REG_DWORD Number Specifies the maximum packet size that the IBM Token Ring adapter is allowed to transmit. Use this parameter when sending data across bridges that may have smaller packet sizes available on the destination network than on the native network. You cannot change this parameter using the Network dialog box in Control Panel. MemoryMapped REG_DWORD 0 or 1 Specifies whether the adapter card is memory mapped. MemoryMappedBaseAddress REG_DWORD Memory address in hex Specifies the base memory (I/O) address used by the adapter card. This number must match the card's memory address settings as specified by its manufacturer. NetworkAddress REG_SZ Number Specifies the address the network adapter should use instead of the burned- in address. For example, for the IBM Token Ring card, this value is 40000000203. You can change this value for Token Ring adapters using the Network dialog box in Control Panel, but not for Ethernet adapters. Transceiver REG_DWORD 1 or 2 Specifies the transceiver as External (1) or OnBoard (2). This value should be 1 for a DEC/Intel/Xerox (DIX) connection. The following table summarizes default settings for various card types. For * see the NOTE following this listing. Card Name Default Setting 3Com: * EtherLink II, InterruptNumber = 3 EtherLink II / TP, IoBaseAddress = 0x300 EtherLink II/ 16, or Transceiver = Internal EtherLink II/ 16 TP MemoryMapped = Off EtherLink 16/16 TP InterruptNumber = 5 IoBaseAddress = 0x300 MemoryMappedAddress = 0xD0000 MemorySize = 16 Transceiver = Internal DEC *: EtherWORKS Turbo EISA SlotNumber = 1 EtherWORKS LC, InterruptNumber = 5 EtherWORKS Turbo, or MemoryAddress = 0xD0000 EtherWORKS Turbo / TP IoBaseAddress = Primary IBM *: Token Ring 16/4 IoBaseAddress = Primary Novell *: NE2000 InterruptNumber = 3 IoBaseAddress = 0x300 Proteon *: P1390 InterruptNumber = 5 IoBaseAddress = 0xa20 DMAChannel = 5 CableType = NTSETUP CardSpeed = 16 SMC/Western Digital: 8003EP, InterruptNumber = 3 8013EWC, or MemoryBaseAddress = 0xD000 8013WB IoBaseAddress = 0x300 Ungermann-Bass *: Ethernet NIUpc (long) InterruptNumber = 5 or Ethernet NIUpc/EOTP IoBaseAddress = 0x368 (short) MemoryMappedAddress = 0xD8000 * NOTE: Settings are not required for EtherLink / MC, DEC PC, IBM Token Ring 16/4A, Proteon P1990, Novell NE3200, SMC/Western Digital 8013EA, and the Ungermann-Bass Ethernet NIUps (MC) or Ethernet NIUps/EOTP (short MC).
"The Windows NT Resource Kit for Operating System Version 3.1".
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