Int E0  - Conccp/m,dr Multiuser Dos - "q_open" - Open Message Queue        [O]

   CL = 87h
   DS:DX -> queue parameter block (QPB) (see #3699,#3784)

Return: AX = status (0000h success, FFFFh failure)
   CX = error code (see #3692)

Note:  also supported by REAL/32

See Also: INT E0/CL=86h,INT E0/CL=88h,INT E0/CL=89h

Format of DR Multiuser DOS queue parameter block:
Offset Size    Description (Table 3699)
 00h   WORD    internal use, initialize to zero
 02h   WORD    queue ID (set by INT E0/CL=87h)
 04h   WORD    internal use, initialize to zero
 06h   WORD    offset of queue message buffer
 08h  8 BYTEs  queue name
---REAL/32 only (real mode)---
 10h   WORD    FFFFh (indicates real-mode version of structure)

See Also: #3784

Format of protected-mode REAL/32 Queue Parameter Block (QPB):
Offset Size    Description (Table 3784)
 00h   WORD    internal use
 02h   WORD    queue ID
 04h   WORD    internal use
 06h   DWORD   32-bit offset to buffer
 0Ah   WORD    selector for buffer
 0Ch  8 BYTEs  queue name

See Also: #3699