Serial#

HKLM\SYSTEM\CurrentControlSet\Services\Serial\Parameters

Description

The Serial# subkeys appear in the registry to provide compatibility with Windows NT 4.0 and earlier.

In Windows NT 4.0 and earlier, each Serial# subkey stores settings for individual serial ports. The settings in the Serial# subkeys take precedence over default settings for all serial ports in the Serial subkey. In Windows 2000, settings for individual ports are stored in device-specific subkeys of the Enum subkey.

If you have upgraded from Windows NT 4.0 and earlier, Serial# subkeys might remain in your registry, but they are not fully supported. When the system starts, it reads the entries in the Serial# subkey, copies them to the device-specific Enum subkey for the port, and then adds the LegacyDiscovered entry to indicate that the entries have been transferred. After that, it ignores the entries in the Serial# subkey.

Caution

Do not edit the Serial# subkeys in Parameters. To configure individual serial ports in Windows 2000, use Device Manager. Device Manager associates each port with the correct device-specific subkey in Enum and changes the settings accurately.

Related Entries

LegacyDiscovered