KOH_Intel5F

Intel^® 5F Extended Interface Functions

The BIOS provides a set of proprietary function calls to control operation of the extended features. These function calls all use AH = 5Fh in their designed interface for easy identification as a proprietary function.

These functions are designed to maintain maximum compatibility with the Desktop and Mobile Video BIOS. As such many of the definitions behave identically. When the behavior of the Embedded Video BIOS is not identical to the Desktop and Mobile Video BIOS it is noted.

In addition to these 5F functions, the Video BIOS also supports all 4F functions defined by the VESA BIOS Extension (VBE) Core Functions Standard, Version 3.0 with the exception of the 0A function (Return VBE Protected Mode Interface). All other functions, from 00 through 09 and 0B are supported by the Video BIOS. The VESA BIOS Extension (VBE) Core Functions Standard, Version 3.0 document is available from

http://www.vesa.org/vesa-standards/free-standards/

The table below provides a summary of the Intel^® EMGD supported Intel 5F functions.

Table 44. Summary of Intel 5F Extended Interface Functions

Function/Name	Description
BIOS Extended Interface Functions
5F01h – Get Video BIOS Information	Gets VBIOS Build Information.
5F05h – Refresh Rate	Sets a new vertical refresh rate for a given mode and returns the current vertical refresh rate
5F10h – Get Display Memory Information	Returns information about the linear memory.
5F1Ch – BIOS Pipe Access	Sets the BIOS pipe access and returns the BIOS pipe access status.
5F29h – Get Mode Information	Returns information on the requested mode.
5F61h – Local Flat Panel Support Function	Supports local flat panel features.
5F68h – System BIOS Callback	Allows SoftBIOS to do any system callbacks through INT 15h
Hooks for the System BIOS
5F31h – POST Completion Notification Hook	Signals the completion of video POST (Power On Self Test)
5F33h – Hook After Mode Set	Allows System BIOS to intercept Video BIOS at the end of a mode set.
5F35h – Boot Display Device Hook	Allows System BIOS to override video display default setting.
5F36h – Boot TV Format Hook	Allows System BIOS to boot TV in selected TV format state.
5F38h – Hook Before Set Mode	Allows the system BIOS to intercept the video BIOS before setting the mode.
5F40h – Config ID Hook	Allows System BIOS to supply a configuration ID that is passed to the driver.

*Other names and brands may be claimed as the property of others.
Revised April 2013