Click above to get retro games delivered to your door ever month!

 DOS 5.0 and 6.0
------------------------------------------------------------------------------

     CA-Clipper/ExoSpace runs under DOS Version 5.0 and 6.0.  These DOS
     versions allow you to put most of the DOS code in the high memory area
     (HMA), the 64 KB above 1 MB, saving about 50 KB of conventional memory.
     They also allow you to put TSRs and device drivers in the upper memory
     area, between 640 KB and 1 MB, with the loadhigh and devicehigh
     commands.

     To use the features offered in DOS 5.0 or 6.0, however, you must also
     use a memory manager.  These DOS versions come with EMM386, which is a
     VCPI host, and with HIMEM.SYS, an XMS memory manager upon which EMM386
     depends.  You can use QEMM or 386MAX instead of EMM386.

     CA-Clipper/ExoSpace programs run well with DOS=HIGH, because they do not
     use memory in the HMA.  In fact, management of the A20 line works better
     with HIMEM.SYS when you set DOS=HIGH.

     To use the loadhigh command with EMM386, set the RAM switch to make it
     an "upper memory block provider."  To use the devicehigh command, set
     DOS=UMB in your CONFIG.SYS.

     For more information about running CA-Clipper/ExoSpace programs in
     environments that have memory managers, see the section Extended Memory
     Protocols in this chapter.