Real-time Unices.

Real-time Unices.

WARNING: this section is badly in need of work. It's full of errors,
and it's incomplete. I hope to have time to look at it this winter
(was "this fall"). I doubt all of following are Unices -- input is
welcome. The list also includes more common Unices with real-time
features, and some non-Unix systems with Unix-like APIs. I don't
suppose the latter really belong here, but having collected some notes,
I'm hesitant to junk them. See also comp.realtime.

AIX: AIX/6000 has real-time support.

Concurrent OS (Concurrent): real Unix, significantly modifed by
Concurrent.

CX/UX: a real UNIX significantly modified by Harris to provide
real-time capabilities and performance. Compliant with POSIX.4 final
version.

EP/LX (Control Data): port of LynxOS to R3000. Formerly called TC/IX.

LynxOS (Lynx Real-Time Systems, Inc): Berkeley and SV compatibility,
ground-up rewrite (proprietary), predates SVR4. Is not UNIX, but
supports much of the UNIX I/Fs (SV and BSD). POSIX compliant. Fully
preemptive, fixed priorities.

MiX: microkernel implementation of SVR4 offered by Chorus.

Motorola SVR4 has real-time capabilities.

QNX (Quantum Software): unix-compatible real real-time OS.

REAL/IX: based on System V 3.2 with RT features (fully premptive kernel,
fixed-priority scheduler, RT timer, &c.). For 68xxx and 88xxx based
systems. POSIX (1003.1 - 1988) compliant and in 88k form, it is
88open BCS compliant. Also available for x86/Pentium.

RTMX O/S [RTMX Incorporated]: elements of NET2, 4.4BSD-Lite and
proprietary code. Also includes FSF tools. Real-time (POSIX)
extensions.

RTU (Concurrent), for 68K boxes

Solaris 2 has real-time capabilities?

Stellix (Stardent); it's Unix, but is it real-time?

Venix/386: Interactive SVR3.2 with real-time extensions.

VMEexec (Motorola): not Unix, but also shares some I/Fs with Unix.

VxWorks (Wind River Systems): Little in common with Unix, has some I/Fs
in common with Unix (but not the file system). Newsgroup:
comp.os.vxworks.

(know nothing about)

Convex RTS

REAL/IX (AEG)

Sorix (Siemens)

System V/86 (Motorola)

TC/IX (CCD)

Velocity (Ready Systems):



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