Thank you all.  Below is a first cut to beat up on.

The box I am using for this has two floppies, a ZIP100, DVDROM\CDROM, DVD W\CD W, two HDD; both plug in. All are functional under FD.

On the HDD that is plugged in for this exercise, C: drive currently boots DRDOS 7, FreeDOS 5, MSDOS 6 and Win98SE. So, config.sys and autoexec.bat have dedicated names for each OS.

Does FreeDOS not have emm386.exe or dpms.exe?

Under FreeDOS, mem.exe /D/E/F/U/X reports:
Largest executable program size      495K (   506,384 bytes)

Under DRDOS--with a LOT more stuff loaded-- mem.exe /a reports:
Largest executable program size      622128 (   608K )

Boot reports:
FreeDOS kernel version 1.1.33 (Build 2033) [Jan 31 2004}
FreeDOS version 0.82 pl 3 XMS_SWAP {Dec 10 2003}

::FreeDOS fdconfig.sys
DEVICE=C:\FDOS\BIN\HIMEM.EXE
DOS=HIGH,UMB
REM DEVICE=C:\FDOS\BIN\atapicdd.sys /D:FDCD0001; doesn't work
DEVICE=C:\DRDOS\CNFG\oakcdrom.sys /D:FDCD0001
SHELL=C:\FDOS\BIN\COMMAND.COM /P=C:\fdauto.bat
BUFFERS=20
FILES=40
LASTDRIVE=Z

::FreeDOS fdauto.bat
pause
@echo off
REM Shsucdx /D:?FDCD0001 /D:?FDCD0002 /D:?FDCD0003; doesn't work
C:\DRDOS\CNFG\nwcdex.exe /D:FDCD0001
C:\FDOS\BIN\ctmouse.exe
PATH=C:\;C:\FDOS;C:\FDOS\BIN;
LH D:\FILEMGR\NC\nc.exe

mem.exe /D/E/F/U/X
   Address     Attr    Name       Program
 -----------  ------ ----------  ----------
  00CF:0048    8004   NUL
  03A6:0000    C800   FDCD0001
  0321:0000    8000   XMSXXXX0
  0070:04B0    8013   CON
  0070:04C2    A040   PRN
  0070:04D4    8000   AUX
  0070:04E6    A040   LPT1
  0070:04F8    A040   LPT2
  0070:050A    A040   LPT3
  0070:051C    8000   COM1
  0070:052E    8000   COM2
  0070:0540    8000   COM3
  0070:0552    8000   COM4
  0070:0564    8008   CLOCK$
  0070:0576    08C2   A: - F:
  EMS driver not installed in system.

Segment   Size       Name         Type
------- --------  ----------  -------------
  0312    44192   DOS         system data
  0DDD       96               free
  0DE4     2928   COMMAND     program
  0E9C      128   NWCDEX |    environment
  0EA5    62256   NWCDEX |    program
  1DD9      128               free
  1DE2     3312   
  1EB2      160   NC          environment
  1EBD    13152   NC          program
  21F4      160               free
  21FF     2928   COMMAND     program
  22B7   506384               free
  9E59      320   COMMAND     environment
  9E6E      272   COMMAND     environment

Segment   Size       Name         Type
------- --------  ----------  -------------
  0312    44192   DOS         system data
  0DDD       96               free
  0DE4     2928   COMMAND     program
  0EA5    62256   NWCDEX |    program
  1DD9      128               free
  1EBD    13152   NC          program
  21F4      160               free
  21FF     2928   COMMAND     program
  22B7   506384               free

Testing XMS memory ...
XMS version               3.00          XMS driver version        3.10
HMA state                 exists        A20 line state            enabled
Free XMS memory           266946560 bytes
Largest free XMS block    266946560 bytes
Free handles              29

 Block   Handle     Size     Locks
------- --------  --------  -------
      0     1778    154624        0
      1     1788    154624        0
Upper memory not available

Memory Type        Total        Used        Free
----------------  --------   ---------    --------
Conventional          634K        139K        495K
Extended (XMS)    261,056K        366K    260,690K
----------------  --------   ---------    --------

Largest executable program size      495K (   506,384 bytes)
FreeDOS is resident in the high memory area.


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