Int 31 Fn FF0D  P - Causeway - "resmem" - Resize Memory Block              [E]

   AX = FF0Dh
   BX = selector for block to be resized
   CX:DX = new size in bytes

Return: CF clear if successful
   CF set on error

Note:  the memory block may have to be copied to another location in order
     to satisfy the requested new size, in which case the base address
     of the selector is updated

See Also: AX=FF0Bh,AX=FF0Eh,AX=FF12h