> DOS 32 bit with LFN support through VMM32.VXD, Another semi-random hint/idea
post Jun 7 2007, 02:08 PM
Post #1


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In my wanderings on the net, I found this (oldish) Italian site:
reporting an article published in PcWorld 02/1999.

The interesting part (in the context of making a RAM only Win9x, by installing it on a HD partition and then copying it to RAMDISK XMSDSK.EXE) is, roughly translated, the following:
in this experiment, Windows 95 - FIRST release .... as using 95B (OSR2) and Windows 98 we had unsolvable problems in booting ...
To be able to copy to RAMdisk the files inclufding Long File Names a 32 bit DOS needs to be used, to build such do the following:
Create a directory C:\TOOLS
cd c:\ramwin\windows\system

copy vmm32.vxd c:\tools\vmm32.exe

copy ..\command.com c:\tools\krnl386.exe

xcopy iosubsys\*.* c:\tools\iosubsys\

copy ..\system.ini c:\tools

copy ..\command\attrib.exe c:\tools

this is enough to be able to later start with the command VMM32.EXE a version of DOS supporting Long File Names, it is better to delete ALL drivers from the [386enh] section of the SYSTEM.INI copy in C:\TOOLS to avoid error messagfes when booting this DOS.

Now you can make in C:\TOOLS a file WINSTART.BAT that will be automatically executed.....
...containing first thing an
and COPY commands for each file to be copied, as in this DOS only INTERNAL commands
support LFN....

I was able to locate, on a German site that appears to have now vanished - or more exacty redirected to a page where a house is advertised for sale:
through some clever wink.gif tricks with googlecache:
a very similar text and instructions.

Anyone has more details on HOW and WHY this works?

And also WHY it only works with Win95 first release files?

If there is a way to use Win95B and/or Win98 (read FAT32) such an idea could be useful for some project.

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post Oct 9 2007, 09:13 AM
Post #2


Group: Advanced user
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Nice find!

I do not have a ME to try it though. sad.gif

If I am allowed some hypothesis on the author of the article, however, he must be a genius of marketing (bolding is mine):
Windows ME can be even more further reduced to only 205kB with CLI. To do this, following files are required:

C:\IO.SYS - copied from bootable floppy image embedded in Windows ME OEM bootable CD
C:\MSDOS.SYS - content listed separately
C:\COMMAND.COM - modification listed separately

msdos.sys file must have minimal content such as:


command.com file must have minimal one-byte modification such as:

at hex offset 00006510 byte 75 is replaced by byte EB

To make booting procedure working, IO.SYS should be copied as first ever file to freshly formatted disk.

I would have written the above as:
Get a ME bootdisk and boot from it.
To install to hard disk, just run a:\Format C: /S and edit command.com and msdos.sys as detailed.



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Posts in this topic
jaclaz   DOS 32 bit with LFN support through VMM32.VXD   Jun 7 2007, 02:08 PM
ispy   Hi Jaclaz, Major bump I know, but here is some st...   Sep 18 2007, 05:43 PM
ispy   Hi again Jaclaz, You may also find the info conta...   Sep 18 2007, 10:06 PM
specter_57   ...and this I stumbled across on the net somewhere...   Sep 19 2007, 04:39 AM
ispy   Hi all, Just trying to help, here is a link to th...   Sep 19 2007, 09:03 AM
MedEvil   If you slimed the original DOS32 further down and ...   Sep 19 2007, 10:38 AM
ispy   Hi MedEvil, Yes, the only problem is I did this a...   Sep 19 2007, 11:40 AM
MedEvil   No need to haste and break a leg. ;) It just would...   Sep 19 2007, 12:56 PM
ispy   Hi MedEvil again, Will get right on it (Sorry hob...   Sep 19 2007, 01:14 PM
ispy   Hi MedEvil & all, :thumbup: As Requested the...   Sep 20 2007, 03:58 PM
MedEvil   Thanks for your work, especialy since you're h...   Sep 20 2007, 04:43 PM
jaclaz   I have the feeling that something can come out of ...   Sep 20 2007, 07:31 PM
ispy   Hi all again, :thumbup: Thanks for all the posit...   Sep 20 2007, 08:41 PM
ispy   Just to keep you updated, Will be on hols from 19...   Sep 21 2007, 10:53 PM
ispy   Hello all again :thumbsup: , On the mini 9x fron...   Oct 8 2007, 09:24 PM
jaclaz   Nice find! I do not have a ME to try it thou...   Oct 9 2007, 09:13 AM

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