IBM PC-DOS

IBM PC-DOS (Personal Computer Disk Operating System) is an operating system for x86 based personal computers developed by Microsoft and IBM (later by IBM exclusively). Up to version 5.00, PC-DOS (then called IBM DOS) was just a rebranded IBM OEM version of MS-DOS, though IBM used their own versioning system. However, with version 5.00, IBM decided to continue PC-DOS development without Microsoft and renamed the product to IBM PC-DOS. Therefore, version 5.00 and later are IBM's own creation independent of MS-DOS. The first version released was version 1.00 and the last version was PC-DOS 2000, an updated release of PC-DOS 7.0.

PC-DOS 1.x

 * 0.90 (1.00 Beta)
 * 1.00
 * 1.10
 * 1.11

PC-DOS 2.x

 * 2.00
 * 2.10

PC-DOS 3.x

 * 3.00 - includes the last IBM-coded BASICA
 * 3.10
 * 3.20
 * 3.30

PC-DOS 4.x

 * 4.00
 * 4.01 - Very rare, same fixes as MS-DOS 4.01, but released by IBM in 4.00 packaging. The only evidence of this being 4.01 and not just regular 4.00 is on the floppy disk labels where it clearly says 4.01.
 * 4.05-V - Japanese, uploaded by roytam1
 * 4.07-V - Japanese, video exists

PC-DOS 5.x

 * 5.00 - Last OEM release, a disk 0 was released to let OEM onto non-IBM machines
 * 5.00.1 - First boxed version after the breakup = 5.00 + disk 0 mixed.
 * 5.00-V - Japanese PC-DOS 5.00
 * 5.02 - includes interlnk. intersvr. and others.
 * 5.02-V - Japanese PC-DOS 5.02
 * IBM OS/2 2.x and later - The DOS session is based on IBM-DOS 5.00

From this point on, PC-DOS versions complement MS-DOS versions (e.g. MS-DOS 6.00 -> PC-DOS 6.10 -> MS-DOS 6.20 -> PC-DOS 6.30)

PC-DOS 6.x

 * 6.00 beta - includes an IBM-branded MSD
 * 6.00 older name for 6.10. Released in a DOS 5 style package.
 * 6.10 - the packaging and install morphed from PC-DOS 5 to 6.3 style in this released.
 * 6.30 - based on PC-DOS 6.10 and MS-DOS 6.20 sources. PCDOS613 was a stepup to 6.x to 6.3
 * OS/2 PPC 3.0 - The DOS files are mostly based in PC-DOS 6.30, with help from OS/2 IPFC help system.

PC-DOS 7.x
Vernon Brooks, lead of the PC-DOS 7.0 development, made a list of the changes made to PC-DOS 7 while he was managing it. There are also a few more resources on his page, both technically and historically relevant.


 * 7.00 - 13th October 1994 Beta
 * 7.00 - 13th October 1994 Beta revision 3
 * 7.00 - first general-avaliability CD release.
 * 7.00.1 - PC-DOS 2000 is version 7 with patches added
 * 7.10 - FAT32 dos used by Norton Ghost, IBM restore disks, and Server Toolkit 1.x
 * J7.00-V - Japanese PC-DOS 7.00
 * P7.00 - Chinese Simplified PC-DOS 2000

PC-DOS 2000

 * 2000 - PC-DOS 7.0 with Y2K and other fixes on a single CD-ROM