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 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

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