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[[Image:NDIX-C beta tape.jpg | thumb | Tape with a beta version of NDIX version C. Unknown if it is source code or a binary copy.]]
'''NDIX''' is the name of the Norsk Data port of BSD unix to the [[ND-500 family|ND-500]] and [[ND-5000 family|ND-5000]] hardware. The OS runs on the ND-500(0) CPU and uses the ND-100 part of the machine as an I/O processor.<br>
The ND-100 CPU runs [[SINTRAN III]] and communicates via [[XMSG]] with NDIX, but compared to how the interaction between the ND-100 and ND-500(0) works when running Sintran it  is quite different for NDIX.<br>
In the Sintran world the ND-100 launches different processes on the ND-500(0) and mage them from the ND-100.  In the NDIX world it works in the opposite way; all process management is on the ND-500(0) (NDIX "owns" the ND-500(0)) and the ND-100 is only used as an I/O processor.  This is achieved by using a special NDIX microcode on the ND-500(0) and a specially generated Sintran for the ND-100.

NDIX was an effort to gain market shares on the emerging UNIX market for servers. The last version of the BSD-based version of NDIX (NDIX-C) was released in 1989, and since the  development of the ND line of hardware ended so did NDIX.<br>
Note that there was a software called NDIX-V that did run on the 88k machines ND sold.  This was just System-V for 88k and nothing ND-specific about it.

== Hardware requirement ==
* ND-500/CX (second generation, MPM 5 and 500/2)
* 2-6 MByte private memory for the ND-100 CPU
* Up to 32 MByte shared memory

== NDIX development centers ==
There were at least one center working on the NDIX system.
* Norsk Data LTD, Benham Valence, Newbury, Berkshire, England.
* Rumored that there was a center in Luleå Tekniska Högskola, Luleå, Sweden.

== Software included ==
* Bourne Shell
* C-Shell
* C
* F77
* PASCAL

== Releases ==
This section lists the releases of NDIX.
; A-version :
; B-version : 1987-10-26, sources are available on tape.
; C-version : At least in beta version, sources available on tape
NDIX Release C product number [[ND 211308]]

== ND Product numbers ==
* [[ND-210746]] NDIX for 16 users<ref>[http://sintran.com/library/libhw/libhw.html sintran.com Norsk Data Library, Software Description Catalogue]</ref>
* [[ND-210903]] NDIX for 32 users
* [[ND-210904]] NDIX for 64 users
* [[ND-210905]] NDIX for over 64 users

==References==
<references />
* [http://sintran.com/sintran/library/libpdpi/ND-210905-A1-EN.pdf ND-210905] 
* NORSK DATA UNIX (NDIX) - ND-5000/ND-100 Interface Specification
* NDIX Memory Layout
* List of special commands for communicating with SINTRAN III
* {{ND-doc|30.055}}
* {{ND-doc|60.244}}
* {{ND-doc|60.245}}
* {{ND-doc|60.246}}
* {{ND-doc|60.247}}
* {{ND-doc|70.003}}

=== NDIX Release C ===
* {{ND-doc|60.327.1 EN}}
* {{ND-doc|60.328.1 EN}}
* {{ND-doc|60.329.1 EN}}
* {{ND-doc|60.330.1 EN}}
* {{ND-doc|60.331.1 EN}}

[[Category:Norsk Data software]]
[[Category:Operating Systems]]
[[Category:NDIX]]