Linked by Uityyy on Sat 21st Oct 2017 21:51 UTC
OSNews, Generic OSes

The old PC-MOS was released under the GNU GPL this Summer. From Wikipedia:

PC-MOS/386 was a multi-user, computer multitasking operating system produced by The Software Link (TSL), announced at COMDEX in November 1986 for February 1987 release.[1] PC-MOS/386, a successor to PC-MOS, can run many MS-DOS software titles on the host machine or a terminal connected to it. Unlike MS-DOS, PC-MOS/386 is optimized for the Intel 80386 processor; however early versions will run on any x86 computer.

The GitHub project includes a 1.44MB disk image for the latest version that will work under VirtualBox, but does not include older versions of the operating system from before it required an 80386+. The system won't work properly if you set a modern date at the boot up prompt.

E-mail Print r 6   9 Comment(s)
Permalink for comment 650202
To read all comments associated with this story, please click here.
by Dasher42 on Tue 24th Oct 2017 09:47 UTC
Member since:

This brings back some memories. I knew people who were doing serious work with PC-MOS. The 386 was brand new, untapped potential for real multitasking, and taking advantage of it with industry standard software was a new frontier.

They literally used disassemblers, repurposed CHASM for the 8086 to make it generate 80386 32-bit code, and at times even used hex editors to make significant performance patches. I watched them do it. It blew my mind that they tracked down code out of a mass of hexadecimal, and I don't know if their work was ever merged with the main code. They were the people that inspired me to want to code to begin with, though, and that's why.

Reply Score: 3