INT 2F - DPMI 0.9+ - GET VENDOR-SPECIFIC API ENTRY POINT
AX = 168Ah
DS:(E)SI = selector:offset of ASCIZ vendor name
Return: AL = status
00h successful
ES:(E)DI -> extended API entry point
8Ah unsuccessful
Notes:  the vendor name is used to determine which entry point to return; it is
case-sensitive
available in protected mode only
32-bit applications use ESI and EDI, 16-bit applications use SI and DI
this call is present but not documented for DPMI 0.9

Vendor names:
"MS-DOS"       ??? and 386MAX v6.00+
"386MAX"       386MAX v6.00+

See also: 310A00

2F168A - DPMI 0.9+ - GET VENDOR-SPECIFIC API ENTRY POINT