IBMDOS.COM
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IBMDOS.COM is the filename of the DOS kernel, traditionally also known as the BDOS (Basic Disk Operating System).
It exists in PC DOS 1.0 to 7.10 and DR-DOS 5.0 and higher (except for DR-DOS 7.06), with MS-DOS using MSDOS.SYS (from version 1.0 to 6.22) for the same purpose. DR DOS 3.31 to 3.41 used DRBDOS.SYS instead.
The file is located in the root directory of the drive containing the operating system and gets loaded by the IBMBIO.COM file in the boot process.
By default, the file is located in the root directory of the bootable drive/partition (normally C:\) and has the hidden, read-only, and system file attributes set.
See also
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