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You are here: Certification > The Open Brand > Register of Open Branded Products > List of Product Standards > Multi-purpose Realtime Operating System

Multi-purpose Realtime Operating System

Category: Operating System Services [RT]

This Product Standard defines interfaces and functionality to support the source portability of applications with realtime requirements. The product standard is aligned with ANSI/IEEE Std. 1003.1b-1993, ANSI/IEEE Std. 1003.1c-1995, and ANSI/IEEE Std. 1003.1i-1995. Realtime in operating systems is the ability of the operating system to provide a required level of service in a bounded response time. The requirements of this product standard are to implement the POSIX 1003.1b-1993 Realtime extensions, with optional support for the POSIX 1003.1c-1995 threads extension.

Product Standards are explained in Practical Guide to the Open Brand

Click for a Web version of the Product Standard

Click for full text of the Product Standard Definition: in PDF Format

Referenced Documents:

System Interfaces and Headers, Issue 5 - Two Volumes

System Interface Definitions, Issue 5

Go Solo 2 - Authorized Guide to the Single UNIX Specification V2

ISO/IEC 9899:1990, Programming Languages - C (technically identifical to ANS X3.159-1989), including Amendment 1:1995, Multibyte Support Extension (MSE) for ISO C.

ISO/IEC 9945-1:1996, Information Technology - Portable Operating Systems Interface (POSIX) - Part 1: Systems Application Programming Interface (API) [C Language] (identifical to IEEE Std. 1003.1-1996). Incorporating ANSI/IEEE Stds. 1003.1-1990, 1003.1b-1993 (Realtime), 1003.1c-1995 (Threads) and 1003.1i-1995 (also Realtime).

Conformance Statement Questionnaires:

CSQ for Multi-purpose Realtime Operating System

Test Suites:

VSX-PCTS (VSX4 run in POSIX.1-1996 mode) , and VSRT , and optionally VSTH

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