Format of Asustek Flash interface

Offset  Size    Description     (Table M068)
 00h 10 BYTEs  signature "ASUS_FLASH"
 0Ah  6 BYTEs  blanks (padding)
 10h   WORD    interface version??? (current PFLASH.EXE requires 0101h)
 12h   DWORD   -> position-independent code to enable shadowing
 16h   WORD    size of code pointed at by previous field (<= 0400h)
 18h   DWORD   -> position-independent code to disable shadowing
 1Ch   WORD    size of code pointed at by previous field (<= 0400h)
--------p-Mxxxxxxx0--------------------------
MEM xxxxh:xxx0h - Advanced Configuration and Power Interface Spec (ACPI) v0.9
Range: any paragraph boundary in the first kilobyte of the XBDA, the last
   kilobyte of conventional memory, or from E000h:0000h to F000h:FFE0h

Note:  scan paragraph boundaries for the signature string "RSD PTR ", followed
     by a valid Root System Description Pointer structure (see #M069)

See Also: INT 15/AX=E820h