Recieved what I hope is the final proto boards in Monday. Over the last few days I have soldered in all the essential parts. Not the front panel mods. That area is still in development and could change. But all parts necessary for the operation of the board have been soldered in except for the power and data cable for the drive. I have power tested the board and nothing blows up, some chips get warm but no sauna chips and no exploding caps or resistors. Since there are no Sam’s manual for the XF551 and therefor no documented measurements I can check against, that may mean nothing at all, but I am cautiously optimistic.
Next up is the attachment of the power and data cables for the floppy and the installation of the board and drive into the case. Then the next major test is the power up w/o connection to the Atari. Does the drive power up like a normal XF551? Is there backfeed through the SIO connectors etc? I don’t want to fry an Atari computer.
I am using the modern format XF551 to test with. It should prove the hardest to get up and running. What I learn here on this one will allow me to get the original setup quicker. I suppose I could have gone the other way around but I only had enough money to send 1 board format to manufacture. $80 for 5 boards 15cm X 15cm plus shipping. It ain’t cheap.
Next update should come by the end of this next week.