Int 15 Fn D042  R - Intel Pentium Pro Bios Update - Installation Check     [-]

   AX = D042h
   BL = 00h

Return: CF clear if successful
   CF set on error
   AH = status
       00h successful
       EBX:ECX = signature "INTELPEP"
       EDX = BIOS update loader version
       SI = number of 2K update blocks which can be recorded in NVRAM
       86h not implemented
   AL = OEM error (if AH is not 00h or 86h, otherwise undefined)
       00h successful
Program: the Pentium Pro BIOS update allows the system BIOS or other software
     to install a microcode patch into the Pentium Pro processor

Notes: this API must be called from actual real mode, not V86 mode
   at least 32K stack space must be available when this function is called

See Also: AX=D042h/BL=01h,AX=D042h/BL=02h,AX=D042h/BL=03h

See Also: @xxxxh:xxxxh"Intel BIOS Upgrade",MSR 00000079h