history - What were the differences between Xenix and Unix . . . Using SCO UNIX describes the history of XENIX and SCO UNIX and provides a brief summary of the technical differences As Raffzahn explains, SCO UNIX is the successor to XENIX XENIX is a licensed version of UNIX; it was called XENIX because initially, AT T didn’t allow its licensees to use the UNIX trademark
Whats the relationship betweeen MS-DOS and XENIX? XENIX used a forward slash as a separator, but versions 1 x of MS-DOS, borrowing from the tradition of DEC operating systems, already used the forward slash for switches in the command line, so Microsoft, at IBM's request, decided to use the backslash as the separator instead
history - What were the Major Public Access Unix Systems Available in . . . 07 22 213-376-5714 pnet02 Redondo Bch CA 3 12 24 24 XENIX (also 213-374-7404) no fee, 90 min limit, login: pnet id: new some USENET, net-work e-mail, multi-threaded conferencing DOWN 213-459-7231 stb Sta Monica CA 3 12 24 24 Tandy 16 no limits, no fee, Serial Tree bbs (home made), shell access 10 31 305-584-4440 pinn Ft Laud FL 3 12 24 24 IBM
How POSIX-compliant is Xenix? - Retrocomputing Stack Exchange Device drivers for Xenix more or less follow the model of V7 SysIII respectively SysV with various quirks and extensions There are some subtle differences between different versions of Xenix It is fairly easy to port drivers from e g another SysV Unix (or a different version of Xenix), but not without reading the Xenix Device Driver Guide first
Why did so many OS names end in x? 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 being compatible with Unix; POSIX is an API specification for Unixoid operating systems; In each case, the "x" is there to show that connection
What was the first Unix version to run on a microcomputer? This was followed shortly by Xenix, Microsoft’s licensed port of Unix, which first shipped in January 1981 on a Z8001-based Central Data Corporation system (not to be confused with the more famous Control Data Corporation) 8086 systems running Xenix started shipping in 1982
Why was the DOS kernel discarded? - Retrocomputing Stack Exchange History tells us that Xenix never replaced DOS, and by the end of 80s Microsoft had abandoned it (see What were the differences between Xenix and Unix?) By this time, Microsoft had embarked on two new operating systems: MS-DOS 4 0 and OS 2 Multi-tasking MS-DOS There was one attempt to extended MS-DOS to produce a more capable operating system
What is the simplest UNIX system with a MMU? A good example for what a low end (non educational research) system might be is Microsoft's XENIX It's not an Unix-alike, but a fully licensed (*1) AT T Unix First based on genuine V7 sources, later upgraded to System III and System V Microsoft sold it mostly to OEMs like Altos, Siemens or Tandy A basic starter system may look like these:
Row locking on RM COBOL-85 - Retrocomputing Stack Exchange The database where just one ISAM and one index file per table, all stored in a network share, mapped in the client computers as a networked drive (except in Xenix, but this is another history) There where no "database server", the client applications open directly the DAT (ISAM file) and IDX (index file) to read and store the data