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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: A2K_Newb on December 10, 2019, 06:09:49 PM

Title: Lighttech A2000 Scan Doubler
Post by: A2K_Newb on December 10, 2019, 06:09:49 PM

Hi Everyone.

Few months ago, I found this project:
https://www.lighttech-hg.de/index.php/open-source-projects/a2000-scandoubler

A low cost video scan doubler for my A2000. I had some boards made, bought some parts, and assembled it over the last few weeks.

This weekend, after fighting with my Xilinx cable, and the 14.7 version of ISE Webpack in a VM, I got the .jed file into the CLPD.

I get a flicker of a distorted workbench, then black, rinse repeat, on my LCD

I think it may have been designed with a PAL amiga in mind, and mine is NTSC.

I'm not sure where to even start troubleshooting.

Has any one else built one of these?

Joe

Title: Re: Lighttech A2000 Scan Doubler
Post by: trekiej on December 11, 2019, 11:49:33 PM

Any new info. on this device?

Title: Re: Lighttech A2000 Scan Doubler
Post by: AJCopland on December 12, 2019, 02:50:22 PM

Has anyone tried contacting the author to ask?
https://www.lighttech-hg.de/index.php/impressum

Title: Re: Lighttech A2000 Scan Doubler
Post by: A2K_Newb on December 12, 2019, 04:47:52 PM

Yes. I had emailed the address in the aminet package when I finished building the project this weekend.

He responded last night and I sent some video of what it was doing.

It does sound like the timing is off.

Is there any amiga documentation on the timings of the video slot for both a PAL and NTSC amiga? The hardware reference manual has a bit about signals, but not too much.