history - What were the differences between Xenix and Unix ...
Feb 25, 2021 · Put another way, even if the reasoning behind the segmentation isn’t consistent compared to previous Xenix releases, there are technical differences between Xenix and SCO …
What's the relationship betweeen MS-DOS and XENIX?
11 The major relationship between MS-DOS and Xenix is that both were Microsoft products. MS-DOS was originally 86-DOS, from Seattle Computer Products, and was licensed by MS to …
Why did so many OS names end in "x?"
Jan 31, 2025 · Xenix is a Unix distribution AIX, HP-UX and IRIX are Unix-derived operating systems Minix and Linux are indepently developed operating systems with the express goal of …
What should be put to the first 128 bytes of the code segment in …
Jan 23, 2023 · I suspect that the reason for this behavior is that after Xenix 86 or 286 loads the program, it changes the first 0x80 bytes of the code, so the int 5 is actually some other …
history - What were the Major Public Access Unix Systems …
May 22, 2020 · There's actually pretty good information on the state of public access Unix systems in 80's and 90's in the form the "nixpub" list that was distributed on Usenet and other …
How do I connect a command prompt to a serial line in MS-DOS …
Dec 23, 2021 · After all, MS-DOS .0 was designed with a clear goal to bridge from CP/M (which 1.x essentially was) over to Xenix, which MS considered the future. Except they never added …
How POSIX-compliant is Xenix? - Retrocomputing Stack Exchange
Xenix was the most popular Unix flavour of the 80's. However, it was designed before the POSIX standards came to be, and its final version was released shortly after the first POSIX …
Operating systems running programs in 286 16-bit protected mode
Oct 17, 2025 · As far as I know, Unix systems other than Xenix in the 1980s, before they gained support for 386 and 32-bit protected mode, ran 16-bit programs (and also the operating …
What was the first Unix version to run on a microcomputer?
35 In 1981, Microsoft released Xenix which could run on the x86, the 68000, and others. As you know, Microsoft targets microcomputers above other markets; that was especially true in the …
Why was the DOS kernel discarded? - Retrocomputing Stack …
Nov 17, 2022 · Microsoft’s other early operating system: Xenix At the time DOS was released, Microsoft already had another operating system, also bought in — Xenix, a licensed version of …