INT 21 - Phar Lap 386/DOS-Extender - GET REAL-MODE LINK INFORMATION
AX = 250Dh
Return: CF clear
EAX = CS:IP of real-mode callback procedure that will call through
from real mode to a protected-mode routine
EBX = 32-bit real-mode address of intermode call data buffer
ECX = size in bytes of intermode call data buffer
ES:EDX = protected-mode address of intermode call data buffer
Notes:  this function is also supported by FlashTek X-32VM
X-32VM guarantees the intermode buffer to be at least 4 KB

Call real-mode callback with:
STACK:  DWORD   offset to protected-mode code
WORD    placeholder for protected-mode CS
DWORD   pointer to selector structure (see below)
or 0000h:0000h for defaults
var     parameters for protected-mode procedure
Return: via FAR return

Format of selector structure:
Offset  Size    Description
00h    WORD    protected-mode GS selector
02h    WORD    protected-mode FS selector
04h    WORD    protected-mode ES selector
06h    WORD    protected-mode DS selector

See also: 21250E

21250D - Phar Lap 386/DOS-Extender - GET REAL-MODE LINK INFORMATION