Int 31 Fn 0306  P - DPMI 0.9+ - Get Raw Mode Switch Addresses              [E]

   AX = 0306h

Return: CF clear
   BX:CX -> procedure to switch from real to protected mode
   SI:(E)DI -> procedure to switch from protected to real mode

Notes: 16-bit programs should jump to SI:DI, 32-bit programs should use SI:EDI
   the caller must save and restore the state of the task with AX=0305h
   not supported by MS Windows 3.0 in Standard mode

See Also: AX=0305h

Values to JUMP at mode-switch procedures with:
   AX = new DS
   CX = new ES
   DX = new SS
   (E)BX = new (E)SP
   SI:(E)DI = new CS:(E)IP

Notes: BP/EBP is preserved across the call, but AX/EAX, BX/EBX, CX/ECX,
     DX/EDX, SI/ESI, and DI/EDI will be undefined; FS and GS will be 0000h
   interrupts will stay disabled during the entire mode switch if they
     are disabled on entry to the mode-switch procedure