QL-VGA

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mk79
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QL-VGA

Postby mk79 » Sun Apr 21, 2019 12:03 am

A new little side project of mine that might be of interest: https://www.kilgus.net/2019/04/21/ql-vga-part-1/


Andrew
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Re: QL-VGA

Postby Andrew » Sun Apr 21, 2019 12:31 am

It definetly is! I'm already waiting for it's release :)


bixio60
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Re: QL-VGA

Postby bixio60 » Sun Apr 21, 2019 5:55 am

mk79 wrote:A new little side project of mine that might be of interest: https://www.kilgus.net/2019/04/21/ql-vga-part-1/


absolutely brilliant as usual, :) waiting the release of the project......

Fabrizio


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dilwyn
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Re: QL-VGA

Postby dilwyn » Sun Apr 21, 2019 11:33 am

Great work Marcel, look forward to it becoming available!

Theold solution of using the cheap City-Skys Chinese scart-hdmi upscaler worked well, including fixing the "missing pixels" issue, but was clumsy - see https://www.qlforum.co.uk/viewtopic.php?f=2&t=770&hilit=city+skies+dilwyn&start=10#p5964

Still gets used from time to time and I know that the monitor connections issue is one of the questions most often asked of me, so Marcel might be on to a winner here if the device makes it to production.


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Re: QL-VGA

Postby martyn_hill » Sun Apr 21, 2019 3:10 pm

Good luck, Marcel!


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Cristian
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Re: QL-VGA

Postby Cristian » Sun Apr 21, 2019 9:32 pm

Great job Marcel! This might be a true "egg of Columbus"!


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Peter
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Re: QL-VGA

Postby Peter » Sun Apr 21, 2019 9:37 pm

dilwyn wrote:Theold solution of using the cheap City-Skys Chinese scart-hdmi upscaler worked well, including fixing the "missing pixels" issue, but was clumsy [...]

A separate box and external power supply would also be needed here, unless there are design changes:
  • Migrate to a modern power-saving FPGA with sufficient internal block RAM.
  • Add a (tricky) circuit that gracefully generates (low) power from a combination of video/sync outputs.
It would then be suitable for a DSUB case. Unfortunately BGA soldering needed.


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vanpeebles
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Re: QL-VGA

Postby vanpeebles » Sun Apr 21, 2019 9:58 pm

Wow! :o


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mk79
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Re: QL-VGA

Postby mk79 » Mon Apr 22, 2019 4:48 pm

dilwyn wrote:Great work Marcel, look forward to it becoming available!

Theold solution of using the cheap City-Skys Chinese scart-hdmi upscaler worked well, including fixing the "missing pixels" issue, but was clumsy - see https://www.qlforum.co.uk/viewtopic.php?f=2&t=770&hilit=city+skies+dilwyn&start=10#p5964

Still gets used from time to time and I know that the monitor connections issue is one of the questions most often asked of me, so Marcel might be on to a winner here if the device makes it to production.
Many different devices seem to use the same enclosure. I have one that looks exactly like yours but is missing pixels. Tofro once brought his, again looks identical, but didn't work at all here (but works well for him!). So this is more a hit-and-miss thing and at some point I didn't want to buy any more misses ;)


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Re: QL-VGA

Postby afx » Mon Apr 22, 2019 8:12 pm

:o :o … Great Marcel !!. Definitely the QL to VGA solution.

I also have the scart-hdmi upscaler that Dilwyn says in his post. In my QLs usually works fine, but sometimes it loses resolution and I have to apply the manual adjustment again. (For that reason, currently I don't use it, I prefer my 1084 monitor).

Marcel, please tell us your progress, it's a nice project for the QL community.


Greetings.



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