INT 31H 0101H: Free DOS Memory Block

                                                    Compatibility: DPMI 1.0+ 
 Expects: AX    0101H
          DX    base selector of selector block to free
          ──────────────────────────────────────────────────────────────────
 Returns: CF    NC (clear) if successful; else AX = DPMI Error Code
          ──────────────────────────────────────────────────────────────────
    Info: This frees an allocation obtained via INT 31H 0100H (allocate DOS
          memory block).  It also frees up the LDT descriptor(s) created by
          that call.

See Also: DPMI API
          INT 2fH: Multiplex Interrupt
          DOS Functions
                                    -♦-