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Reduced IO.SYS


Tihiy
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No it's the integrated memory manager that has been removed (automatically used by Win98 (some kind of trick to say that win98 is not DOS...)).

Isn't this only true for Windows ME? AFAIK, Windows 98 doesn't have a memory manager integrated into its kernel.

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No it's the integrated memory manager that has been removed (automatically used by Win98 (some kind of trick to say that win98 is not DOS...)).

Isn't this only true for Windows ME? AFAIK, Windows 98 doesn't have a memory manager integrated into its kernel.

Of course you are right, alexanrs! Tihiy has removed the integrated the DOS part of DWCFGMG (DOS and Windows Plug and Play Configuration Manager), which is redundant, because its supreceeded by CONFIGMG.VxD when starting Win 9x. See also the attached text (from 1994, when it was standalone).

DWCFGMG.TXT

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Never knew that that was integrated into IO.SYS.

For those with Plug'n'play addon cards that do not want to allow the bios to handle it all by itself, is there a way to activate this in a non-modified IO.SYS or it was left there de-activated?

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Just tried this. Unfortunately on my system, it will boot Windows in fallback video mode (640*480*16 colors), with a message saying the videocard couldn't be configured; and even though windoze offers to change the display mode, it will /force reboot/ after doing so : upon reboot, go back to square one !

This goes to prove that the DOS part of config manager may be useful on some systems...

I'll still keep Tihyi's reduced IO.SYS, will be great for booting DOS 7 from floppys.

--

Ninho

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Just tried this. Unfortunately on my system, it will boot Windows in fallback video mode (640*480*16 colors), with a message saying the videocard couldn't be configured; and even though windoze offers to change the display mode, it will /force reboot/ after doing so : upon reboot, go back to square one !

This goes to prove that the DOS part of config manager may be useful on some systems...

I'll still keep Tihyi's reduced IO.SYS, will be great for booting DOS 7 from floppys.

--

Ninho

Thanks for the report, Ninho! You rock! :thumbup

Reporting the issues of modded programs is of fundamental importance, and helps a lot when troubleshooting our systems!

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Hi.

For years, I am looking for details about: IO.sys logo compression.

Now, it seems to be that Tihiy could have the solution.

Comparing Tihiy's reduced io.sys with the original io.sys there are following differences:

a.) Different header b.) differences at: 0x136C2, 0x136D5, 0x136D6 c.) additional data at 0x1E010 inside the original io.sys.

At 0x1E010 there are following bytes:

7D8C0020445300000A6D8A0B6F400081B549C0288AA100813C0A0221862270C4
C094B80009618C0863334420FD090A10415080108202C410146088A000530405
182328C01C41010A090A50495080528202D41214E09AA000E70405B827282002
410171080AA84450402D8202EA11149093A080DE040574273802991B838C0D43

Is 7D 8C 00 20 ... a header for a Microsoft compression format (ms cab, ms compress/expand, lz77, lzxx)?

Is the splash screen / logo inside the original io.sys compressed at all?

How to extract/uncompress the logo data in Win95/98/ME's io.sys?

Edited by Borg Number One
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Because DOS manager has been removed, ye need the following line in MSDOS.SYS

[Options]

SystemReg=0

This disables DOS looking for system registry entries, and lets windows use a different way of doing what is needed.

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