Another A4000 Reborn!

Hello from Sunny Florida! Yes I am on yet another work trip and away from home not doing retro hardware stuff. I guess having to do my real job must get in the way from time to time right??

Well today I bring you a great picture of one of my boards I sent out to my good friend John Hertell. He has done an old dead 4000 a great service by transplanting its parts to this nice newly made white PCB, complete with my logo on it!!! It does me proud to see these machines getting new life in the exact way I have intended them to live again through these boards!! Well done John and thanks for showing it off!

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Accepting Boards Once Again

With things finally caught up again I can start to accept a selective amount of minor repairs, recaps, and upgrades again. Anything with severe corrosion and abuse will remain on hold for now. I just don’t have the time to deal with that. Recaps should go out within a few days of receiving them. Repairs will depend on the issue, but totally dead boards are not particularly desirable for me still. I do have several personal projects I would like to complete between things too.

A4000 Rev B Replica Prototype Boards

I just wanted to show off a clear set of images of the new boards. They came out fantastic! As you all read this I have a set of boards being sent off to a couple select people that will be building them along with me to test them. I can say that I expect them to work great. This weekend I have spent a lot of time testing traces against a real board and the online PCB explorer site. So far I haven’t found any mistakes. I expect good news very soon!

A4000 Replica (Based on the Rev B)

This is it! This first views of the now completed A4000 Rev B layout! I’m going over it and will soon ask for feedback on this. Please remember this is in Mentor Graphics PADS and requires the viewer from them if you want to see it yourself. It’s free from them. This is amazing work! The pcb database file is located in the layout folder at the Github here: https://github.com/Acill/A4000RevB

Capture

I’ve put a lot of time into this and want to thank everyone that donated to make it possible. Very soon now the data to allow new boards to be manufactured will be posted on the Github as well. For those that have access to the full version of Mentor Graphics PADS you could take the info in the Github currently and export it to Gerbers, but I ask that you wait for the final versions to be announced after it’s verified completely. These are the completed project files though now unless errors are discovered.

Yet Another 1200 Trace Repair

It seems I have been fixing 1200’s with blown traces a lot these days. In my opinion, this is something that shouldn’t be happening as often as I see it. Remember when you are installing things on the clock ports in this machine that it wasn’t ever intended to be used in the way we are using them. USB devices, fast serial ports, and other things can draw a  lot of power. In the case of this one, it was a Subway USB controller that when it was connected wrong and the 12V line from the floppy plugged in caused a short and blew the line. The only way to repair it was by using a jumper. Fortunately its all on the bottom of the board and not seen once installed back into the case.