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White screen with STacy

Problems with your machine in general.
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Badwolf
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Re: White screen with STacy

Post by Badwolf »

Roberto wrote: Fri Oct 21, 2022 3:44 pm 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:

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Re: White screen with STacy

Post by Roberto »

Badwolf wrote: Fri Oct 21, 2022 3:47 pm 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.
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Re: White screen with STacy

Post by Badwolf »

Roberto wrote: Fri Oct 21, 2022 7:08 pm 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.

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Re: White screen with STacy

Post by Roberto »

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 ...

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Re: White screen with STacy

Post by rubber_jonnie »

Roberto wrote: Tue Nov 15, 2022 3:11 pm then inserted the new CPU…. I couldn't resist ... and immediately turned on my old STacy ...
Dude, don't keep us hanging!!
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Re: White screen with STacy

Post by Darklord »

rubber_jonnie wrote: Tue Nov 15, 2022 3:30 pm
Roberto wrote: Tue Nov 15, 2022 3:11 pm 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:
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Re: White screen with STacy

Post by rubber_jonnie »

Darklord wrote: Tue Nov 15, 2022 4:10 pm
rubber_jonnie wrote: Tue Nov 15, 2022 3:30 pm

Dude, don't keep us hanging!!
Talk about a cliffhanger/teaser ending/post! :lol:
And still nothing!!

I'm going with 'It works!'
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
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Re: White screen with STacy

Post by Darklord »

rubber_jonnie wrote: Tue Nov 15, 2022 4:10 pm
Darklord wrote: Tue Nov 15, 2022 4:10 pm

Talk about a cliffhanger/teaser ending/post! :lol:
And still nothing!!
Next season? :pullhair:
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Re: White screen with STacy

Post by rubber_jonnie »

Darklord wrote: Tue Nov 15, 2022 4:11 pm
rubber_jonnie wrote: Tue Nov 15, 2022 4:10 pm

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:
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
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Re: White screen with STacy

Post by exxos »

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