#zilog — Public Fediverse posts

You like some #KramerMC news? After the last try it doesn't work properly again. Which doesn't surprise me with the catastrophic condition of the CPU board. I'm tired of looking for broken wires/cuts again and again. We decided that a colleague in the museum would etch the whole thing again from scratch. And I would then build a "new old" one, of course with the original parts.
At the moment I'm revising the layout scanned in 1200 dpi in GIMP. It's always a bit of a loss when it's 35 years old and printed on extreme eco-friendly paper.
#RetroComputing #Zilog #U880

Today's afternoon in the museum wasn't really successful at all. I carried my EPROM simulator (memSIM2) with me to make a few tests with the real #KramerMC. But the beast wasn't thankful using it after a sleep of two years. Nothing broke, but it doesn't do what it supposed to do. A small test program filling the CRT memory with various characters. But I used the time and revised my git repo so that now all required programs under DOS and Linux with their instructions are part of it.

But I won't give up that easily. But the others asked me what I would do if one day the computer ran without errors 😂​
#RetroComputing #Zilog #Z80 #U880

After a long time I decided to take another look at our #KramerMC. I made good progress tonight and I think I'm on the right track. I can compile a downloaded listing using "The Macroassembler AS" on Windows. Since this is available in the source code, it should also be possible to create it under Linux. Then start #JKCEmu - simply the best, only needs Java - as an alternative ROM.
#RetroComputing #Zilog #Z80

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

I'm everytime impressed about https://z88dk.org and all the supported platforms. Started as a tool for implementing a TCPIP stack easier with C for the #SinclairZ88.
Now it supports such niche computers like #VZ200, my #EpsonPX8 and - yes! - the #KramerMC in the museum.

#RetroComputing #Zilog #Z80