CODEVIEW
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  Purpose : CodeView debugger support

  Syntax  : CODEVIEW

  Default : Disabled

  The CODEVIEW command globally and retroactively enables the processing
  of CodeView debugging information, regardless of the position of the
  CODEVIEW statement in the link script file. The CODEVIEW command is
  identical in effect to a CVON command at the beginning of the link
  script.

  Developers with large overlaid programs may see some performance
  degradation of their overlaid code whilst running under the CodeView
  debugger if the CODEVIEW command has been used. If performance is an
  issue under these circumstances, it is recommended to use the CVON and
  CVOFF commands to create CodeView areas which selectively enable
  debugging information for specific files, modules or libraries.

  The default version of CodeView information added to the .EXE file is 0
  for maximum compatibility with other debuggers. Versions 1 and 2 may be
  selected using the CVVERSION command.