Instruction set documentation for the Nixdorf 1559 CPU

[kcsl]

Does anybody happen to have the CPU instruction set details for a Nixdorf 1559 CPU.

I could kick myself as I had all this documentation 25 years ago, and binned it (who the heck would ever want this old junk)... looks like I do

I'm in the middle of building a system that has a changable CPU and I want to look at implementing this old Nixdorf instruction set.

Any help, links to sites etc would be great.

many thanks.

Joe

 

[niros developer]

Hello Joe,
are you still interested in this topic?
From 1982 until 1993 I took part in the development of the NIROS ( Nixdorf interactive realtime operating system ) operating system. NIROS was derived from the IRIS-system. It's base was a modified NOVA code. ( modified I/O-instructions using index-registers and displacement, additional instruction patterns for byte-loading/storing using "useless" arithmetic pattern : no load skip never, no load skip always )
NIROS was the base of the Nixdorf 8870.
The 1559 was the first cpu, which could be run in a multiprocessor environment.
Unfortunately I can't support you with an manuals ...

... but elephants never forget

axel