You will find technical information for the DAP3 in the Model 1 Technical Reference manual I have available in the download section of this site.
DAP4 and country specific changes
Depending on the origin country and your operating system you may encounter issues when using DAP4s (or BA80s) in your own country. The DAP4 I have originated in the UK, it’s keyboard came from Germany as did the version of NIROS that I’m using and this means that some of the keys on the keyboard […]
NIROS – Nixdorf Interactive Real-time Operating System versions
The picture on the left is a BA80 display showing the NIROS EX 3.3 log-on screen. The first version of NIROS that I can find any record of is 3.3 (not EX 3.3 just plain NIROS 3.3) and was the first version I used. Over the years, it went through many enhancements and updates. I’ve listed […]
8870 CPU instruction set
If you open an 8870 system cabinet you will find circuit boards or plates, and if you open these plates you won’t find a CPU chip (actually that’s not completely correct as Nixdorf loved the Z80 CPU and you find them in all their peripherals), but the main system CPU was actually bit-slice technology; meaning it […]