This structure is used in the following DPMI API services:

INT 31H 0300H (simulate real-mode interrupt)
INT 31H 0301H (call real-mode for FAR RET return)
INT 31H 0302H (call real-mode for IRET return)

Offset Size Contents
+0      4  lRegDI  DI or EDI
+4      4  lRegSI  SI or ESI
+8      4  lRegBP  BP or EBP
+0cH     4  lRes    (reserved, should be 00000000H)
+10H     4  lRegBC  BX or EBX
+14H     4  lRegDX  DX or EDX
+18H     4  lRegCX  CX or ECX
+1cH     4  lRegAX  AX or EAX
+20H     2  wFlags  Flags (CPU status flags)
+22H     2  wRegES  ES
+24H     2  wRegDS  DS
+26H     2  wRegFS  FS (not used in 16-bit applications)
+28H     2  wRegGS  GS (not used in 16-bit applications)
+2aH     2  wRegIP  IP (not used in fn 0300H)
+2cH     2  wRegCS  CS (not used in fn 0300H)
+2eH     2  wRegSP  SP (0000H=host provides real-mode stack)
+30H     2  wRegSS  SS (0000H=host provides real-mode stack)
50          size of a DpmiRegRec

Notes:   When wRegSS and wRegSP are 0000H, the DPMI will supply a real-
mode stack.

  Values for segment registers must be valid for real mode (don't
pass protected-mode selectors).

  16-bit applications need supply only the first two bytes of the
4-byte lRegXX fields.

16-bit applications need not supply values for FS and GS, even
when running on a 80386+ CPU.

See Also: DPMI API
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