is a system file in MS-DOS and Windows 9x operating systems.

In versions of MS-DOS from 1.1x through 6.22, the file comprises the MS-DOS kernel and is responsible for file access and program management. <code>MSDOS.SYS</code> is loaded by the DOS BIOS <code>IO.SYS</code> as part of the boot procedure.

References

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MSDOS.SYS in Windows 9x (95/98/ME):

  • Microsoft Knowledge Base (MSKB): List of MSDOS.SYS articles
  • MDGx: Windows 95/98/ME Complete MSDOS.SYS Reference
  • UKT Support: Contents of the MSDOS.SYS File
  • Computer Hope: Information about Window MSDOS.SYS file
  • MDGx: WINBOOT.INI