All is running without any problems (sometimes the vga card is obviously not correctly initialized and I have to boot several times).
My intention was to keep the original systems DOS and Win95 and also the path information in the ini-, grp- and other files. So I am able to switch between the os-systems and access all my installed software.
This can be achieved with little effort.
You should start with the preparations before the installation of Win95. If you already installed it, you should restore the original DOS- and Windows-subdirectory from your backups. If you didn't made backups, you have to install DOS and Windows 3.* from scratch. In this case you should better stop here and read something about backup strategies.
Most of you will know that Win95 saves the original DOS files with the extention dos in the case of booting Win95 and vice versa with the extention w40 in the case of booting DOS. In the following you should always keep in mind which os is running. If I write e.g. "config.sys" I talk about the config.sys of the actually running os. Of course the names of files and directory are up to you.
RUNNING DOS
Create a subdirectory DOS.622 and copy your DOS subdirectory into.
Create a subdirectory WINDOWS.WFW and copy your WINDOWS subdirectory into.
Create a subdirectory BOOT.622. Copy config.sys, autoexec.bat, command.com, country.sys, himem.sys, ifshlp.sys, move.exe, setver.exe, protocol.ini, system.ini in BOOT.622. Most of this files are not really necessary for the following boot switching in this directory but it is a good place for saving the special files for the os system. Inspect your config.sys to identify all drivers loaded at boot time. If this drivers are not hardware or software specific but from the normally shared DOS subdirectory, you have to copy this driver and potentially necessary files (e.g. *.cpi) also in BOOT.622.
Create a subdirectory BOOT.95. If you already installed Win95, you find the original DOS-files with the extention *.w40. Copy this files and rename it to the original names. See also RUNNING WIN95 for copying other files.
Now prepare your config.sys and autoexec.bat for the installation of Win95. The original files are now saved in BOOT.622. Delete or comment the lines with not DOS drivers or TSR. No HD or CDROM drivers or anything else if possible. If Win95 is not able to find your specific hardware you can try to integrate this specific drivers. Do not remove the programs for the vga chip in the autoexec.bat (e.g. clmode, vmode, powerhz, setcrt). This files are needed to initialize the vga card for higher resolutions.
Make a batch job called DOS622.BAT and store it BOOT.622. You can copy the following and adopt to your paths:
IF EXIST D:\WINDOWS.95\WIN.COM GOTO jump1
d:\boot.622\MOVE d:\windows d:\windows.95
d:\boot.622\MOVE d:\windows.wfw d:\windows
:jump1
IF EXIST C:\DOS.95\COMMAND.COM GOTO jump2
d:\boot.622\MOVE c:\dos c:\dos.95
d:\boot.622\MOVE c:\dos.622 c:\dos
:jump2
Edit config.sys and append the following. You can copy the following and adopt to your paths:
install=command.com /c d:\boot.622\dos622.bat
RUNNING WIN95 Setup
Do it from cdrom or floppies. If you enough place on your harddisk you should copy it to a subdirectory. Follow the instructions and choose the upgrade of your original windows installation. Your WINDOWS subdirectory will contain afterwards the new WIN95 installation.
RUNNING WIN95
After the hopefully succesfull installation (your turn) you have to change the default boot menu. This is described in DBWIN95.TXT from Bob Schaffer which describes another approach of a double boot installation. Thanks, Bob. I copied it from Bob Schaffer's DBWIN95.TXT and added 5a. In the final beta release BootMenuDefault=8 must be used for original DOS as default and not 7 cited by Bob. Network= may be 0 or 1.
5a. In order for the dual boot menu to work, the setting WinBootDir must be changed. I let the orginal setting as comment. Override the original setting (your windows subdirectory) by the newly created BOOT.95 subdirectory. If you get problems, edit this file again and restore the original setting.
[Paths]
WinDir=D:\WINDOWS
WinBootDir=D:\BOOT.95
;WinBootDir=D:\WINDOWS
HostWinBootDrv=D
5. In order for the dual boot menu to work, the following lines must
appear in the [Options] section of your MSDOS.SYS file: (If you use
Doublespace or Drivespace disk compression you must change both MSDOS.SYS
files - one on the boot drive and one in the compressed drive)
[Options]
BootGUI=1
Network=1 (I have a standalone with dial up and sometimes a nic installed)
BootMulti=1
BootMenu=1
BootMenuDefault=8 (original DOS as default. Use 1 for Win95 default)
BootMenuDelay=5 (number of seconds to select something else)
;
To add these lines, first, open "My Computer" and use the menu bar to
VIEW - OPTIONS - VIEW - Show All Files, and also unclick "hide MS-DOS
file extensions". Then double-click on the MSDOS.SYS icon and look.
If it doesn't have all the above lines, you'll need to edit this file
and put them in.
Since the MSDOS.SYS file is "read-only-hidden" you'll need to first
change the file attributes and then use the notebook editor to insert
the new line(s). Then you'll have to change the attributes back to
their original states when done to protect the file.
To change the attributes, click on the MSDOS.SYS icon using your RIGHT
mouse button. Select Properties and uncheck the attribute blocks.
Exit and make your text changes, then save the file. Then put the
attribute check marks back where they were.
So far Bob. Now again my turn.
Create a subdirectory BOOT.95 if you did not already. Copy from the root config.sys, autoexec.bat, command.com and from the WINDOWS subdirectory ansi.sys, country.sys, dblbuf.sys, display.sys, ega*.cpi, himem.sys, ifshlp.sys, move.exe, setver.exe. Most of this files are not really necessary for the following boot switching in this directory but it is a good place for saving the special files for the os system.
Edit config.sys and append the following. You can copy the following and adopt to your paths:
install=command.com /c d:\boot.95\windows95.bat
RUNNING DOS
Now boot and start DOS. Copy system.dat, system.da0, user.dat, user.da0 from the WINDOWS.95 subdirectory into the BOOT.95 subdirectory.
Ready.
I hope I mentioned all steps. If not let it me know. Improvements are appreciated.
