After getting the #Commodore#C64 and #C128 running again, the next device to repair is the #C1571.
It had #corrosion and #rust on the main board and the power supply is beyond repairworthiness. I'd replace the latter with a #meanwell RD-35 with 5 and 12 volt output.
One #diode was rusty, a few traces needed #cleaning and five #resistor looked bad. Hope the black hybrid chip is still okay.
Sadly, the lower read head seems to be broken, my work might've been in vain. #floppydrive#retrocomputer
To make absolutely sure that the 6502 #processor is defective, I built a #NOP test #circuit on a #breadboard with a 100kHz #NE555 clock and a couple of LEDs on the address lines.
A known working 6502 looks fine, I can clearly see the higher address lines counting up (I accidentally inverted the LEDs).
The one from the 1541 doesn't show any activity. Only address lines A0 to A3 look normal on the oscilloscope. #retrocomputing
If #Judge#Cannon continues as she has, the outcome seems to be all but a foregone conclusion.
It’s difficult to believe that, at this point, any panel of #Eleventh#Circuit judges wouldn’t believe the Judge needs to step aside.
It’s worth noting that because Judge Cannon has delayed rulings, there are issues beyond the Presidential Records Act (PRA) that must be decided before trial
-- and could result in an appeal.
There are motions regarding presidential immunity motion and selective/vindictive prosecution still pending.
There are classified evidence issues yet to be decided under the Classified Information Procedures Act (CIPA).
There might be motions in limine that result in a decision by the Judge to exclude evidence the government obtained during the search of Mar-a-Lago or that Trump claims is protected by attorney-client privilege that could lead to pre-trial appeals.
The issues with this case and Judge Cannon are far from over.
I needed an audio probe kind of thing to test other stuff with, so I built this. Nothing really new here, it's essentially just a tweaked datasheet example using common basic concepts, and variations of this circuit can be found all over the place. I figured I'd post this anyway, in case someone else might find it useful.
A page with some notes and stuff can be found here: