here's an enlarged and colored animation of how I probably did the #compositing of the ball outline over 4 pixel animation in an 8 pixel raster...
#kc85 #u880 #sprites

that was the #cpu already very outdated at the time... there was a basic plug-in module but we quickly switched to #assembler ... luckily there was an interpretative dialog assembler (IDAS) as a plug-in module 🤘🏼

#kc85-1 #u880

https://en.wikipedia.org/wiki/U880

Now I'm curious who knows the #KramerMC, or more uncommon who has ever seen one in real life.
At the end of the 1980s, a book by #ManfredKramer was published by the military publishing house of the GDR. It described how to build your own computer based on the 'Zilog' #U880 CPU. The book goes into many details, including monitor listings, circuit board layouts and technical details.
The example on the pic comes from the person who developed the circuit board layouts at the time. It has a personal dedication from Manfred Kramer and so it appears to be No. 2 of the KramerMC. In parts it is still usable, at least its display preparation is working again after extensive repairs.
#RetroComputing #GDR #Zilog #Z80 #ComputerMuseum