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SYS will also copy the command line shell (COMMAND.COM) into the root directory. [6] The command can be applied to hard drives and floppy disks to repair or create a boot sector. Although an article on Microsoft's website says the SYS command was introduced in MS-DOS version 2.0, [7] this is incorrect.
For example, in DOS 5, if the current directory is C:\TEMP, then TRUENAME command.com will display C:\TEMP\COMMAND.COM (which does not exist), not C:\DOS\COMMAND.COM (which does and is in the PATH). This command displays the UNC pathnames of mapped network or local CD drives.
On other systems, like the Apple II and Atari 8-bit computers, almost all software is self-booting. On the IBM PC, the distinction is between a self-booting program and one which is started by the user via an operating system such as MS-DOS or IBM PC DOS. The term "PC booter" was not contemporaneous with when self-booting games were being released.
SystemRescueCD (at the first prompt select "Run system tools from floppy disk image" (version 1.6.0)). As of version 2.8.1 and above SystemRescueCD does not include RPM anymore. RPM can be installed to a floppy disk from the TUI (it does not require use of the command line as is required to save a text file of the partition table).
MSX-DOS and the extended BASIC with 3½-inch floppy disk support were simultaneously developed by Microsoft and ASCII Corporation as a software and hardware standard for the MSX home computer standard, to add disk capabilities to BASIC and to give the system a cheaper software medium than Memory Cartridges, and a more powerful storage system than cassette tape. [1]
Likewise, the IO.SYS of the older system is named IO.DOS for as long as Windows 9x is active. DR-DOS 7.06 (only this version) also follows this scheme and the IO.SYS filename in order to become bootable via MS-DOS boot sectors. Similarly, FreeDOS uses a combined system file as well, but names it KERNEL.SYS.
A modern PC is configured to attempt to boot from various devices in a certain order. If a computer is not booting from the device desired, such as the floppy drive, the user may have to enter the BIOS Setup function by pressing a special key when the computer is first turned on (such as Delete, F1, F2, F10 or F12), and then changing the boot order. [6]
MS-DOS / PC DOS and some related disk operating systems use the files mentioned here. System Files: [1] IO.SYS (or IBMBIO.COM): This contains the system initialization code and builtin device drivers; MSDOS.SYS (or IBMDOS.COM): This contains the DOS kernel. Command-line interpreter (Shell): COMMAND.COM: This is the command interpreter.