Int 21 Fn 350D  P - Flashtek X-32vm - Reserve Block Of Memory For 32-bit   [E]

   AX = 350Dh
   EBX = current ESP value
   ECX = size of block in bytes
   DS = default DS

Return: CF clear if successful
       EBX = new value for ESP
       EDX = suggested new limit for SS
   CF set on error

Note:  this function should only be called once during initialization

See Also: AX=350Bh,AX=350Ch