19-05-2022, 07:15 PM
Hello Witchy.
I've been to the Centre for Computing History. I visited in 2017 while I was in the UK.
Fantastic place. Jason did an interview and I rambled on a bit. The videos are on Youtube.
They have a couple of Microbees there. A Rom based machine and a Premium Plus.
The Premium Plus was not working properly while I was there and needed some attention.
I can't remember whether the other machine worked or not.
I regards to fixing your other three bee's, the first thing to do is swap the top boards from the dead ones into
your working one and see if they work. That at least starts to narrow down the fault finding : top board / bottom board.
You may find if you clean up the contacts on the 2 x 25way pins strips and plug / unplug the top boards from the bottom
a few times that the machines start working. This is quite common.
I've been to the Centre for Computing History. I visited in 2017 while I was in the UK.
Fantastic place. Jason did an interview and I rambled on a bit. The videos are on Youtube.
They have a couple of Microbees there. A Rom based machine and a Premium Plus.
The Premium Plus was not working properly while I was there and needed some attention.
I can't remember whether the other machine worked or not.
I regards to fixing your other three bee's, the first thing to do is swap the top boards from the dead ones into
your working one and see if they work. That at least starts to narrow down the fault finding : top board / bottom board.
You may find if you clean up the contacts on the 2 x 25way pins strips and plug / unplug the top boards from the bottom
a few times that the machines start working. This is quite common.