Microsoft Debug Port Table 2 (DBG2)

This specification defines the format of the Debug Port Table 2 (DBG2), used in platform firmware to describe the debug ports available on the system.

Microsoft requires a debug port on all systems. To describe the debug port(s) available on a platform, Microsoft defines an operating system–specific table (DBG2) that specifies one or more independent ports for debugging purposes. The presence of the table indicates that the system includes a debug port.

The table contains information about the configuration of the debug port, and is located in system memory with other Advanced Configuration and Power Interface (ACPI) tables. The DBG2 table must be referenced in the ACPI Root System Description Table (RSDT).

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Included in this paper

  • Debug Port Table 2 (DBG2)
  • Debug Device Information structure

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