China DOS Union

The machine has dos6.22 and win95 installed. After I used the Win95 boot disk to do a sys c： once, it could no longer boot 6.22. Right now, the contents of msdos.sys are as follows：


WinDir=C:\WINDOWS
WinBootDir=C:\WINDOWS
HostWinBootDrv=C


BootWin＝1
BootMenu=1
BootMulti=1
BootGUI=0
NetWork=1

After booting, a menu appears, but when I select Previous MS-DOS version, it still boots the DOS inside 95 rather than 6.22. So how can I make it run 6.22 again now? Thanks.

Theoretically it can be done, but MS-DOS 6.22 is obviously no longer of any use now, so you might as well just use the MS-DOS 7.x that comes with Win9x. After all, MS-DOS 7.x has better compatibility than MS-DOS 6.22 (it is a newer version, after all!).

Yes, you can. You just need to rename a few core files from DOS622 as below, then copy them to the root directory of drive C.
io.sys->io.dos
msdos.sys->msdos.dos
command.com->command.dos

Thanks to both of you. But there's still one more problem:
When running dos7.0, after entering the ver command, should it display: windows 95.【version 4.00.1111】?

Also, after adding those 3 DOS files, when I choose Previous MS-DOS version, the following message appears:

incorrect dos version
incorrect dos version

bad or minssing command interperter
enter correct name of command interperter(eg, c:\command.com)

If I enter command at this point, the response is:
bad or minssing command interperter
enter correct name of command interperter(eg, c:\command.com)


If I enter c:\command.com, the response is:
incorrect dos version

bad or minssing command interperter
enter correct name of command interperter(eg, c:\command.com)


Where is the problem here?

Did you rename them first? It looks like you replaced 7.0's command.com with DOS622's command.com

Right, the WIN version number for MS-DOS 7.10 is 4.00.1111 or 4.10.1998 or 4.10.2222.
MS-DOS 6.22 does not support FAT32/long filenames/large hard disks, and it may also damage the system, so installing it is not recommended.