CodeView (cv.hlp) (Table of Contents; Topic list)
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Use Extended Memory (/X) (CV only)
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     The /X option enables the use of extended memory. "Extended
     memory" refers to memory above 1MB that is accessible on 80286,
     80386, and 80486 machines. If HIMEM.SYS or another extended-
     memory driver is installed, all but 16K of CodeView, plus all of
     the symbolic information for the program you are debugging, are
     placed in extended memory.
 
     NOTE: This option is not required to use extended memory,
           since CodeView uses extended memory automatically if an
           extended memory (XMS) driver is installed. However, if you
           use this option, CodeView displays an error message if an
           XMS driver is not installed.
 
     See: ◄Use Expanded Memory (/E)►
          ◄Use Disk Overlays (/D)►
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