Set Segment Limit

Sets the limit field in the LDT descriptor for the specified
segment.

Call With:

   AX     = 0008H
   BX     = selector
   CX:DX  = 32-bit segment limit

Returns:

   if function successful
   Carry flag= clear

   if function unsuccessful
   Carry flag= set
   AX     = error code
           8021H   invalid value (CX <> 0 on a 16-bit DPMI
                   host; or the limit is greater than 1 MB,
                   but the low twelve bits are not set)
           8022H   invalid selector
           8025H   invalid linear address (changing the
                   limit would cause the descriptor to
                   reference a linear address range outside
                   that allowed for DPMI clients.)

Notes:

o  The value supplied to the function in CX:DX is the byte
   length of the segment-1 (i.e., the value returned by the
   LSL instruction).
o  Segment limits greater than or equal to 1 MB must be
   page-aligned.  That is, limits greater than 1 MB must
   have the low 12 bits set.
o  This function has an implicit effect on  the "G"
   (granularity) bit in an 80386 descriptor's extended
   access rights/type byte; i.e., it is the host's
   responsibility to set the "G" bit correctly.
o  Client programs must use the LSL instruction to query the
   limit for a descriptor.  Note that on 80386 machines, the
   client must use the 32-bit form of LSL if the segment
   size is greater than 64 KB.
o  A DPMI 1.0 host will reload any segment registers which
   contain the selector specified in register BX.  It is
   suggested that DPMI 0.9 hosts also implement this.
o  Refer to the rules for descriptor usage in Appendix D.