MattisLind's latest activity

A few here. A bit pricey shipping to Sweden though.

Hello! Really good work you have done with the mem expansion board and this board. Not really related to the Rainbow card itself but...

Looking for 3.5 to 5.25 inch drive bay brackets with black front that has a LED in it. Something like this: Anyone has something...

Nice to hear that it worked! Good luck with the rest of your restoration!

The one I took a screenshot from above. The full schematics is here unless you already found it. The manual is also very good to read to...

Thinking of it. The microprogram counter has to be in the backplane since it gets to the KM11 board. I just don't know what pins. It has...

The KM11 has a toggle switch for this. There is lines on the bus DC LOW L. The signal is open collector so just add a driver that forces...

I think that you either have to use a KM11 and single step it or use a logic analyzer so we can se any possible transitions until it...

I would check the micrprogramcounter, MPC. It is in E101 and E111. The clock signal, the inputs and the outputs. Is there any activity...

1N4935 looks fine. It is a fast recovery diode. Should replace A114B just fine.

It is quite interesting to note how the fuse blows. When there is a short in the switch transistor or rectifier bridge the fuse blows in...

Yes. Indeed quite complex. I am just thinking out loud now: if the Q5 transistor is not driven into saturation it might get hot. Then...

I also installed the same zip package as you did. But NFS came from fsck.technology site. Unfortunately it refused to install. It...

Nice! Did you install all the updates? Did you manage to install NFS and the Distributed Function packages? Have you seen the files...

Difficult one. The lower voltage on Q4 emitter may indicate higher regulated voltage consumption. But there are variations on the zener...