Command Code Format

Setup and Configuration of Intel AMT > Setup and Configuration Methods > Connecting with the Intel MEI Driver > Command Code Format

Command Code Format

The first field in a message header is a 32-bit command specifier. This command field is broken down into three subfields: Operation, class, and a response identifier.

typedef struct _command_fmt

{

UINT32 Operation : 23;

UINT32 IsResponse : 1;

UINT32 Class : 8;

} COMMAND_FMT;

Field	Value or Description
Operation	Bits 22:0 describe the operation associated with message.
IsResponse	Bit 23 is set if message is a response, else it is clear.
Class	Bits 31:24 describe the class, or command group.