#imsai8080 — Public Fediverse posts

Good morning, my first 'work' for today is finished. Because one of the head nuts openend over the time one of the screws has fallen into the housing. Now all 12 are secured with red thread locker. I hope they stay where they belong now.
#Kneisner #M100 #Imsai8080

Repórter Retro 122

https://retropolis.com.br/2026/02/25/reporter-retro-122/

#ReprterRetro #DOScember #6800 #8BitGuy #Amiga3000 #AMXProject #AtariSt #BASIC #Casemod #Centurion #Clabretro #CoCoTown #Commodore128 #Commodore1541 #Commodore64 #Commodore64Ultimate #CommodoreKIM1 #CommodorePET #Compaq #CP500 #CP400 #CulturaHacker #DanielCampos #DBASEIII #DEC #DESQView #diagnstico #ElectricAdventures #emulao #FbioNMI #fita #IMSAI8080 #JanBeta #Japo #Jogos #JogosDeGuerra #JuanCastro #KevinNoki #LAN

First engineering phase and secondly manufacturing phase are done. The top frame for the acrylic glas and the painting in matte black are the next steps to be done.
#Kneisner #M100 #Imsai8080

What a great day, our #Kneisner #m100, a German #Imsai8080 clone, has made it's first boot without a loaded diskette after a few seconds of waiting.
For testing purposes I used a Seagate ST-225, which full capacity isn't used at the moment. I've to figure out how to handle the drives parameters in #TurboDOS reasonable. Maybe it is impossible, but does not care at the end.

After over a year of continuous investigations, tests, measurements, repairs and absolutely active help from the USA, our #Kneisner #M100 is now booting #turboDOS from a floppy disk.
It still has a few quirks with its front panel. But the next step will be to try to boot it from D.Gesswein's MFM emulator from a known working HD image. To see whether the WD hard disk controller and the IMS controller card are still working properly.
The whole thing is now a "once in a lifetime" project for me. What I wasn't aware of until now is that the #IMSAI8080 will be 50 years old this year.
#RetroComputing #ComputerMuseum

Has someone an idea why it doesn't work? Our #Imsai8080 clone called #Kneisner #m100 refuses to work proper. So I need your small advice which part exactly is broken 😀 Thanks a lot *jokingly* 😂
#ComputerMuseum #Tinkering

Today we've done a lot of measury at the #Kneisner #M100. With the working riser board it was really a pleasure to do. One of the first things which is unnormal - Pin 52 of the #S100 bus should have -18V and has, are you sitting, +4V. One thing to take a look at next weekend. And we have done a few measurements at the RAM expansion card, somethings goes wrong with BD1 column data bit.
#RetroComputing #ComputerMuseum #IMSAI8080

In parallel we got two presamples for the switches of the #IMSAI8080 clone named #m100 by #Kneisner. I'll take some 'in machine' pictures on Saturday.
#RetroComputing #ComputerMuseum