URI: 

  TEXT eXtended Memory Specification (XMS), ver 2.0.txt
  TEXT eXtended Memory Specification (XMS), ver 3.0.txt
       _________________________________________________________________
       "The universe is probably littered with the one-planet graves of
        cultures which made the sensible economic decision that there's
        no good reason to go into space--each discovered, studied, and
        remembered by the ones who made the irrational decision."
                                                     -- Randall Munroe