# Command: dos

      DOS tells the DOS kernel how to load itself.
      DOS is a CONFIG.SYS / FDCONFIG.SYS command.

## Syntax:

      dos=high|low[,umb|noumb]
        or
      dos=[high|low,]umb|noumb

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## Options:

      dos=high   Tells DOS to load itself into high memory (UMA). You must
                 first load a high memory manager (e.g. FDXMS, HIMEM, HIMEMX).
      dos=low    Tells DOS to load into conventional memory.
      dos=umb    Tells DOS to keep a link between UMA and conventional.
      dos=noumb  Tells DOS not to keep a link between UMA and conventional.

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## Comments:

      DOS indicates whether the kernel should try to load itself into high
      memory (HIGH) or only conventional (LOW), and whether to link upper
      memory blocks in with normal memory (UMB) or not (NOUMB).
      Note: only one set need be given, ie dos=high and dos=noumb are ok.
      Important: if you specify dos=high[,umb|noumb] then you must also
      load a high memory manager (first), e.g. HIMEM, HIMEMX or JEMMEX.
      DOS is a command internal to kernel.sys and needs no other file
      in order to work.

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## Examples:

      IN CONFIG.SYS / FDCONFIG.SYS:
        DOS=HIGH,UMB
      OR:
        DOS=LOW,NOUMB

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## See also:

      config.sys
      fdconfig.sys
      fdxms
      fdxms286
      himem
      himemx
      jemmex

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## File:

      Please read this command's lsm file also.
      You will find the updated version (internet) here and
      the version described in this manual page here.
      The lsm file contains information about the name of the programmer,
      the download site, and some other command related information.

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      Copyright © 1998 Jim Hall, updated 2008 by W. Spiegl.

      This file is derived from the FreeDOS Spec Command HOWTO.
      See the file H2Cpying for copying conditions.