Langue: en

Version: 300674 (debian - 07/07/09)

Section: 4 (Pilotes et protocoles réseau)

BSD mandoc


smapi - System Management Application Program Interface driver


Many IBM Thinkpad laptops utilize a special software interface known as SMAPI (System Management Application Program Interface). This interface controls various aspects of the system including:

Client software must locate a ``header image'' stored in the F000 segment in the Thinkpad ROM (read-only memory), which resides at the 16-byte boundary. This is considered the ``Entry Point'' for the service.

The ``header image'' stores information like:

To invoke the SMAPI BIOS a far-call must be used on the entry point specified in the header file. All other information should be stored in the client data area. The client is required to prepare both an input and output parameter in a data area of its own. This area can be ``informed'' by pushing those pointers into its stack before the far-calls.

The SMAPI BIOS uses the stack and data areas with the selector during a BIOS invocation, thus the caller must define the same privilege area as the BIOS

The parameter structure will be made up by using the input and output fields prepared by the caller. The input field will specify the function request to the BIOS The BIOS will then drop a return value into the output field. These fields are made up of three parts. The first holds parameters, function numbers, and return codes. The next will contain an offset in hexadecimal. Finally a length field which is comprised of Byte, Word, or Double Word.


"IBM Thinkpad 560/560E Technical Reference" "06J0536 S76H-7587-01"
"IBM Thinkpad 560Z Technical Reference" "xxxxxxx xxxx-xxxx-xx"
"IBM Thinkpad 600 Technical Reference" "xxxxxxx xxxx-xxxx-xx"
"IBM Thinkpad 760XD/760XL/765D/765L Technical Reference" "06J0537 S30H-2433-02"
"IBM Thinkpad 770 Technical Reference" "05L1739 S05L-1739-00"


An -nosplit The driver was written by An Matthew N. Dodd Aq . This manual page was written by An Tom Rhodes Aq and An Matthew N. Dodd Aq .