Microware OS-9 Documentation

Here you will find complete manuals for Microware OS-9 products. CD-i's operating system CD-RTOS is based on OS-9 2.4.



Since all technical documents on Microware's official website are related to OS-9 version 3.0 and up and as such not valid for CD-i related reference, the three documents below reflecting version 2.4 were kindly supplied by Microware Systems Corporation for exclusive distribution on the ICDIA website.

  • Using Professional OS-9 2.4
  • OS-9 2.4 Technical Manual
  • OS-9 2.4 Technical I/O Manual


  • All manuals: © Copyright 1990-1994 Microware Systems Corp.
    All rights reserved. These manuals are only published for eductional purposes.



    The Microware documents below are republished by Allen-Bradly and have been freely available online for quite some time. They cover a wider range of OS-9 products but most of them are not fully or directly applicable to consumer CD-i systems.

  • OS-9 Operating System User Manual
  • OS-9 BASIC User Manual
  • OS-9 C Language User Manual
  • OS-9 Technical I/O User Manual
  • OS-9 Assembler/Linker User Manual
  • OS-9 Technical User Manual
  • OS-9 Internet Software Reference Manual



  • The Microware documents below have been scanned and converted to text using OCR software. The text conversions contain lots of errors that still need correction; if you are interested in helping out with this please contact us using the link in the page footer below.

  • CD-I System Libraries Technical Reference Manual

    This document contains descriptions of the C language bindings for the UCM and CDFM functions specified in the Green Book, the CSD (Configuration Status Descriptor) functions and the C language bindings for the OS-9 system calls F$Alarm, F$Load, F$DatMod and F$SrqCMem.

  • OS-9/68000 User-State Debugger

    This document describes the use of the OS-9 User-State Debugger debug for debugging and testing user-state 68000 machine language programs written for the OS-9/68000 operating system.

  • Cross C Compiler Installation Manual

    This document describes the installation of the OS-9 Cross C Compiler on a number of UNIX platforms (Sun 3/4, HP, Apollo, VAX UNIX/VMS and MV68).

  • OS-9 C Compiler Version 3.2 Release Notes

    This document contains descriptions of all changes to Microware's C compiler, assembler, and linker since the 2.3 release of OS-9, with sections on New C Functions, Enhancements and Corrected Bugs, Documentation Corrections, Known Bugs and Edition Numbers.

  • OS-9 Version 2.4 Release Notes

    This document contains descriptions of all changes to Microware's OS-9 software since the Version 2.3 Release with chapters on New OS-9 Features, Software Corrections and Enhancements, Application Notes, Documentation Corrections and Known Bugs.


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