PC-DOS 1.x

IBM PC-DOS was an IBM branded version of MS-DOS licensed from Microsoft for use on the IBM PC system. 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. 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. Its direct competitors on the PC at the time were CP/M-86 and UCSD p-System. 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.

For Microsoft and other OEM DOS releases, please see the MS-DOS product page.

The first version of PC-DOS was released in August 1981 with the IBM PC. The last version released by IBM was PC-DOS 7.1, which had releases all the way up until 2003. This last version of DOS is still in use by some hardware developers usually embedded into recovery tools and BIOS flashers.

This OS does not have a GUI. It uses a command line interface, however PC-DOS 4 and later, like MS-DOS, also included the optional graphical DOSShell program. Like other DOSes, third party GUIs can be installed.

IBM PC-DOS 1.0 was a port of 86-DOS purchased by Microsoft in 1981 for use on the IBM PC. This version of DOS resembles that of CP/M at the time. Only 160kB 5.25 inch (134mm) floppies were supported. Directory support did not exist with this version of DOS.

Installation instructions

PC-DOS 1.x was a floppy-only version of DOS. It cannot be installed to a harddrive.

Emulation instructions: Suggested emulator for this OS would be MESS. The disk images are bootable and should be able to be booted by MESS.

Product type
OS
Release date
1981
End of life date
1989
Minimum CPU
Intel 8088 @ 4.77MHz
Minimum RAM
16KB
Minimum free disk space
160KB
User interface
Text
Platform
DOS

Downloads

Download Name Version Language CPU File type File size
IBM PC-DOS 0.90 (6-5-1981) (1.00 Beta) (5.25-160k) 1.00 Beta Prerelease English x86 5¼ Floppy 172.95KB
IBM PC-DOS 1.00 (5.25-160k) 1.00 English x86 5¼ Floppy 3.24MB
IBM PC-DOS 1.00 Manual Jan82 1.00 English x86 Archive 6.71MB
IBM PC-DOS 1.10 (5.25-160k) 1.10 English x86 5¼ Floppy 2.93MB
IBM PC-DOS 1.10 Manual May82 1.10 English x86 5¼ Floppy 7.82MB

Comments

Comments by