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. In the Windows 95, IO.SYS is an (in other words, a program) that, when the operating system is booted (started), processes s that tell the operating system how the computer is set up. In Windows 95, IO.SYS replaced the older system files, IO.SYS and MSDOS.SYS. The newer IO.SYS contains all the information needed to start your computer and eliminates the need for the and files because the values in CONFIG.SYS and AUTOEXEC.BAT are in IO.SYS instead. Both of these files still come with Windows for older applications and drivers that need them.

While you should not use MS-DOS 8.0 as a stand-alone MS-DOS, you sure can do it with MS-DOS 7.1. So you might as well install WIn 95, then replace all DOS files by those from 98SE (and some from ME) and then add the various fixes to IO.SYS (I believe RLoew released a freware patcher for IO.SYS, IIRR). ATTRIB.EXE: 15,796: Application: 05:00:02 AM: AUTOEXEC.BAT: 29: MS-DOS Batch File: 01:21:04 AM: CHKDSK.EXE: 16,200: Application: 05. IO.SYS is an essential part of MS-DOS and Windows 9x. It contains the default MS-DOS device drivers (hardware interfacing routines) and the DOS initialization program. Boot sequence. In the PC bootup sequence, the first sector of the boot disk is loaded into.

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In computers using DOS or Windows 3.x, the IO.SYS is loaded with the MSDOS.SYS file when the computer is booted. MSDOS.SYS is a text file that determines whether DOS or Windows is loaded. Because IO.SYS is a sequence of executable code rather than readable text, it is not editable like MSDOS.SYS, CONFIG.SYS, and AUTOEXEC.BAT. To change values that come with IO.SYS, you must change the CONFIG.SYS file. In loading IO.SYS, the system picks up any changed values that are present in the CONFIG.SYS file.