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  Win9x & DOS
If you are looking for the latest and greatest version of DOS, then look no further than Windows 98SE. Windows 98SE runs on Microsoft's last fully compatible version of MS-DOS, DOS 7.1. Unlike DOS 6.22, DOS 7.1 supports hard drive partitions up to 128GB (requires Free FDISK). To install MS-DOS 7.1, simply complete a standard Windows 98SE installation and then edit the Msdos.sys file located on your C: drive. Under [Options] set BootGUI=0. You can also disable the Windows 98SE boot logo by adding the line Logo=0. You can boot into Windows at any time by entering WIN at the command prompt.

By default the Msdos.sys file is located in the root folder of your C: drive. If you can not find it, do not worry, by default it is hidden. You will have to change your folder options in order to view hidden files. Go to Start/Documents/My Documents/View/Folder Options/View and check Show all files. Before you edit your Msdos.sys file you need to change the file's permissions to read/write. To do this simply right-click on the file, select Properties, and uncheck Read-only. Once you have changed the permissions you can edit the Msdos.sys file with notepad. Go to Start/Run and enter notepad c:\msdos.sys

Below is an example of an edited Msdos.sys file. The changed/added entries are highlighted in yellow. Show me how to edit my Msdos.sys file. Help me! I can't play the "Show me" files.

Msdos.sys (Windows 98SE example)




;The following lines are required for compatibility with other programs.
;Do not remove them (MSDOS.SYS needs to be >1024 bytes).

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