INT 2F PU - Borland C++ 3.0 DPMILOAD.EXE - ALLOCATE MEMORY
        AX = FB42h
        BX = 0002h
        ES:SI -> memory block info (see below)
Return: ???
Note:   The version of DPMILOAD distributed with BC++ v2.0 identifies itself
          as version 1.000, while the version distributed with BC++ 3.0
          identifies itself as version 1.0; the former is 10864 bytes, the
          latter 22180 bytes.
SeeAlso: AX=FB42h/BX=0008h

Format of memory block info:
Offset  Size    Description
 00h    WORD    flags
                bit 0: set if data segment rather than code segment
                bit 1: information valid
                bit 2: set if DOS memory block rather than DPMI memory block
                bit 4: ???
                bit 15: set if no LDT selectors for memory block???
 02h    DWORD   block size in bytes
---DPMI memory block---
 06h    DWORD   DPMI memory block handle
---DOS memory block---
 06h    WORD    real-mode segment of memory block
 08h    WORD    selector of memory block
---
 0Ah    DWORD   linear address of memory
 0Eh    WORD    memory operation error code
                0008h no more free LDT descriptors
---if flags bit 0 clear---
 10h    WORD    code segment selector for memory block or 0000h or FFFFh
 12h    WORD    data alias selector for memory block or 0000h or FFFFh
---if flags bit 0 set---
 10h    WORD    data segment selector for memory block or 0000h or FFFFh
 12h    WORD    unused???