exxos's Atari, Amiga & retro forum

Roberto wrote: 21 Oct 2022 15:44 in addition to struggling with the STacy card I also have to struggle with my English… 😂 yes, now I understand what @exxos was asking me. here are the photos of the two Vcc pins of the CPU. the voltage seems stable and correct.

Excellent. I presume it looks flat at all (ie. slower) timebases too?

If so, then that's good news & is most likely safe to continue debugging. :thumbup:

BW

Badwolf wrote: 21 Oct 2022 15:47 Excellent. I presume it looks flat at all (ie. slower) timebases too?

I tried to change the time base, from 2us (as in the picture), up to 500 ms. The oscilloscope always displays a stable and unchanged 5V line (no sawtooth) ... I hope you meant this as I am not yet very familiar with the oscilloscope.

Roberto wrote: 21 Oct 2022 19:08 I tried to change the time base, from 2us (as in the picture), up to 500 ms. The oscilloscope always displays a stable and unchanged 5V line (no sawtooth) ... I hope you meant this as I am not yet very familiar with the oscilloscope.

Perfect!

Although I think you mentioned when you saw that sawtooth earlier it came on over time. It would be worth letting it run a few minutes and double checking all's still stable.

I'd say at this point, whilst it's entirely possible there are some transients in there causing chips to fail, you'd be extremely unlucky if your Stacy blew up a replacement processor.

BW

today I finally had time to remove the old CPU. I cut the pins, one by one, and saw that they had burn marks on the back. I removed the tin from the holes with the help of an air compressor, covering the board to prevent the tin from being thrown around the board. then, the simplest part: inserted the socket, soldered the pins, cleaned the board with a product dedicated to this purpose, then inserted the new CPU…. I couldn't resist ... and immediately turned on my old STacy ...

Roberto wrote: 15 Nov 2022 15:11 then inserted the new CPU…. I couldn't resist ... and immediately turned on my old STacy ...

Dude, don't keep us hanging!!

rubber_jonnie wrote: 15 Nov 2022 15:30

Roberto wrote: 15 Nov 2022 15:11 then inserted the new CPU…. I couldn't resist ... and immediately turned on my old STacy ...

Dude, don't keep us hanging!!

Talk about a cliffhanger/teaser ending/post! :lol:

Darklord wrote: 15 Nov 2022 16:10

rubber_jonnie wrote: 15 Nov 2022 15:30

Dude, don't keep us hanging!!

Talk about a cliffhanger/teaser ending/post! :lol:

And still nothing!!

I'm going with 'It works!'

rubber_jonnie wrote: 15 Nov 2022 16:10

Darklord wrote: 15 Nov 2022 16:10

Talk about a cliffhanger/teaser ending/post! :lol:

And still nothing!!

Next season? :pullhair:

Darklord wrote: 15 Nov 2022 16:11

rubber_jonnie wrote: 15 Nov 2022 16:10

And still nothing!!

Next season? :pullhair:

Very likely, but I expect we'll have to wait 18 months for that due to the heavy post production schedule :dizzy:

No GB6 screenshot.... Then it didn't happen :lol: :roll: