The term density has a double meaning for floppy disks. TPI was not a part of the physical manufacturing process it was a certification of how closely tracks of data could be spaced on the medium safely. Like other DOSes, third party GUIs can be installed.Logical and physical layout of data in a floppy diskĭifferent floppy disk types had different recording characteristics, with varying magnetic coercivity (measured in oersteds, or in modern SI units in amperes per meter), ferrite grain size, and tracks per inch (TPI). It uses a command line interface, however PC-DOS 4 and later, like MS-DOS, also included the optional graphical DOSShell program. This last version of DOS is still in use by some hardware developers usually embedded into recovery tools and BIOS flashers. The last version released by IBM was PC-DOS 7.1, which had updates all the way up until 2003. The first version of PC-DOS was released in August 1981 with the IBM PC. The major differences between PC-DOS and MS-DOS were only in terms of driver support and built in programs until version 6.1 where development diverged.įor Microsoft and other OEM DOS releases, please see the MS-DOS product page. Its direct competitors on the PC at the time were CP/M-86 and UCSD p-System. ![]() Although not the only OS available for the IBM PC when it came out, it quickly became popular due to its low cost in comparison to the others. ![]() Versions of PC-DOS paralleled that of MS-DOS up until version 6.1, where PC-DOS was independently maintained by IBM up until 7.1, the last version. IBM PC-DOS was an IBM branded version of MS-DOS licensed from Microsoft for use on the IBM PC system.
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