First 2048 bytes from original unmodified Windows Me OEM CD IO.SYS.
This IO.SYS directly support real MS-DOS mode.(Comparison of x86 DOS operating systems - Wikipedia, the free encyclopedia). Windows Me OEM CD IO.SYS can load automatically DBLBUFF.SYS and IFSHLP.SYS etc... for launch Windows 9x and display boot logo and startup text: Now preparing to start your new computer... Startup Menu has no differences with the Startup Menu Windows 98 SE.
Inside IO.SYS extracted from Windows XP, Vista & Seven diskcopy.dll and decompressed with The Decompressor for IO.SYS Version 8 by Rudolph R. Loew you can find not displayed string: Now preparing to start your new computer...Also Windows Me splash screen does not appear, DBLBUFF.SYS and IFSHLP.SYS don't load, Startup Menu disabled etc... first 2k check booting from floppy. But it is some file modified by Microsoft.
I tried booting to ms-dos prompt without dos configuration files (msdos.sys=winboot.ini, config.sys. autoexec.bat) & entered set command:
PATH= PROMPT=$P$G COMSPEC=C:\COMMAND.COMI need Patch to DisableLog straight from decompressed IO.SYS without using msdos.sys=winboot.ini