[OFFER] IBM PC-DOS 4.0 CSD AND IBM PC-DOS 4.02
PC-DOS 4.00 CSD aka PC-DOS 4.00 Corrective Service Disk Installation
Download Link
https://mega.nz/#!Bfg0GChT!b7zbNQ8UaCrOb48e91D29NW-jn5ZY0Ld5aMnWfoRPcQ
PC-DOS 4.02 is rare version of PC-DOS 4.02 This version of PC-DOS still identified itself as DOS 4.00, even in releases including files with mid-1991 timestamps. PC-DOS 4.02 have a 1990 copyright message. IBM’s ROM DOS 4.0 appears to have used somewhat different technology than Microsoft’s DOS 5.0.
Download Link
https://mega.nz/#!ge4gjQqa!pnP9cNpdk-kIRnwwuoLTeZQyWofHQRdIKhi2ZbdEbWM
Comments
It's not a "rare PC DOS 4.02". It is PC DOS 4.00 that was distributed with IBM PS/1 Model 2011. This one and some other PS/1 OEM versions can be found here:
ps1stuff.wordpress.com/download/
Depends on how one defines rare. In times of internet and terrabyte disks no software is anymore rare once it shows up on the net.
But from the perspective of 198x and DOS4 was not widely used, it was/is somehow rare.