Solution for external Flicker fixer?

[robinsonb5]

and vertical banding that messing with the h-size won't get rid of.

Messing with the H-size is unlikely to help, but adjusting the monitor's "clock" setting might. (What you've got here is an interference pattern between the monitor's pixel clock and the Amiga's (or rather, GBS's) pixel clock. That's why the dithering on your workbench background seems to alternate between sharp and blurred.

You may well not have enough adjustment on the monitor's clock setting to get rid of it completely, but adjusting it might well help.

 

[Snoozy]

Somethings not right with your set up. If you look back to my pictures here on page 37 this thread, these were with a 40" samsung tv

https://www.amibay.com/showthread.php?t=20468&page=37

No vertical banding. Maybe there is a problem with vertical sync in your lead from amiga to gbs 8220?

The clarity of your pictures also seems poor hmmm

All the Samsung TV's I have tried get great pics with their built in SCART sockets. Doesnt yours have one? Is the Gonbes board+VGA better than the inbuilt SCART and a SCART cable from your Amiga? Can you tell the difference?

Have a look at those pictures on this thread p37, the difference between amiga scart and amiga vga gbs 8220 is the difference between night and day.

I couldn't bear to use amiga scart on my samsung led - the picture was horrible and blocky - yes i know this means high resolution but it needs properly scaling, ie gbs 8220

Until my indi II ever becomes compatible with my led tv then its gbs 8220 for my amiga (and snes)

 

[johnim]

another thing ubermick

what screen mode and how many colours are you using for that desktop pic


https://www.amibay.com/member.php?u=6029

 

[ubermick]

Messing with the H-size is unlikely to help, but adjusting the monitor's "clock" setting might. (What you've got here is an interference pattern between the monitor's pixel clock and the Amiga's (or rather, GBS's) pixel clock. That's why the dithering on your workbench background seems to alternate between sharp and blurred.

You may well not have enough adjustment on the monitor's clock setting to get rid of it completely, but adjusting it might well help.

Have tried that on the Dell monitor, but no joy there. The Samsung doesn't have the option (or probably does, it's just called "coarseness"), but messing with each and every function on there didn't help anything.

another thing ubermick

what screen mode and how many colours are you using for that desktop pic

The GBS is set to 800x600, and the desktop on OS 3.1 is 640x480 at 256 colours. Tried setting the GBS down to 640x480, but did nothing to help the horrible resolution.

At this point, the only thing I can think is that it's the cable from the miggy to the GBS (which is the one that came with it, with a brand new 23 pin connector added with high quality silver solder) or perhaps a dodgy board. I've made sure I snagged an AC adaptor that's rated at 5v 2A too, and tried one or two different ones of those but to no avail.

 

[johnim]

im using mine on highres laced with 16 colours which is ok for gbs. the gbs is set to 1024/768

 

[djos]

I've found the 800x600 mode to be the best compromise between games and workbench on my 500+.

I do have an issue with PAL not working properly from my 500+ (no idea why) but Im about to add a sync-stripper which should fix the issue (based on some experiments i've performed). I converted the RGB from the Miggy to Component and feed the GBS with Component. I assume this will cure the issue as my rgb-component transcoder has a composite sync-stripper built in to the design.

My GBS-8220 seems to be a 2010 design.

Gut's of my RGB-Component transcoder:

 

[amiman99]

I've found the 800x600 mode to be the best compromise between games and workbench on my 500+.

I do have an issue with PAL not working properly from my 500+ (no idea why) but Im about to add a sync-stripper which should fix the issue (based on some experiments i've performed). I converted the RGB from the Miggy to Component and feed the GBS with Component. I assume this will cure the issue as my rgb-component transcoder has a composite sync-stripper built in to the design.

My GBS-8220 seems to be a 2010 design.

Gut's of my RGB-Component transcoder:

I had a same problem with mine GBS with PAL resolutions and for a while I could not get it to work in PAL (the screen was off color and frozen).
On day I started to play with the settings and I got it to work in PAL and NTSC.
I noticed that optimal setting for NTSC were not good for PAL, so I found something in the middle.
The settings are as follows (I think 640x480 res):
HPOS 56
VPOS 16
HSIZE 48
VSIZE 55
CLAMP ST 97
CLAMP SD 00

These settings work in
PAL and NTSC.
Good luck.

 

[djos]

I had a same problem with mine GBS with PAL resolutions and for a while I could not get it to work in PAL (the screen was off color and frozen).
On day I started to play with the settings and I got it to work in PAL and NTSC.
I noticed that optimal setting for NTSC were not good for PAL, so I found something in the middle.
The settings are as follows (I think 640x480 res):
HPOS 56
VPOS 16
HSIZE 48
VSIZE 55
CLAMP ST 97
CLAMP SD 00

These settings work in
PAL and NTSC.
Good luck.

Cheers, I will try those settings.

EDIT: Bugger me, they work great, even on 800x600!

 

[djos]

I tweaked those setting a little more for 800x600 res:

HPOS 50
VPOS 14
HSIZE 50
VSIZE 56
CLAMP ST 97
CLAMP SD 00

 

[Mendel]

Has anyone successfully connected Atari STe with rgb scart cable to a (modified) GBS scaler and finally to a vga monitor?

I am asking because my tv does not sync to Atari STe rgb scart, but it does sync to Amiga so there is something very different with how these computers send their sync signal.

I am hoping maybe GBS can solve my problem, maybe I would get image if I connect Atari STe to rgb scart input of a modified GBS scaler and then connect the GBS with vga either to my monitor or the tv.

Has anyone done anything like this?

 

[velourfog]

It seems the GBS doesn't work that great with STE. The STF/STFM works better. I haven't tried myself yet with my STF.

 

[Methanoid]

Has anyone successfully connected Atari STe with rgb scart cable to a (modified) GBS scaler and finally to a vga monitor?

I am asking because my tv does not sync to Atari STe rgb scart, but it does sync to Amiga so there is something very different with how these computers send their sync signal.

I am hoping maybe GBS can solve my problem, maybe I would get image if I connect Atari STe to rgb scart input of a modified GBS scaler and then connect the GBS with vga either to my monitor or the tv.

Has anyone done anything like this?

Not yet... I'm in the same situation as you. Two STEs and both wont sync to the SCART on my Acer AT2326 TV/Monitor but WILL to any of my Samsung TVs. I either have to connect to a Samsung or see if I can get the Gonbes working. There are some suggestions at Atari-Forum of how you should connect the Sync elements of the STE signal to the Gonbes so check it out.

 

[BEANZ]

Just received my board last night, Already had the cable made before it arrived thanks to several posts here showing how to make.

I've added a connector in between which will be mounted on the case so I can use custom cables for different sources by just plugging in the appropriate cable (you can see the connector in the first photo below).

Works great, no problems at all, just got to finish up putting the case together with the menu buttons on it. Paid $30 for the board.

---------- Post added at 08:42 ---------- Previous post was at 08:41 ----------

And here are the photos of it on my A1200 (had to post 1 before it would let me add the photos).

 

[johnim]

nice I see you got the case from eBay I got 1 but not fitted it yet

 

[BEANZ]

Actually got the case from a local electronics store, Vellman brand case or something like that. Was $6.95. Just the right size too.

Thanks again to those who posted about how to make the cable.

 

[BEANZ]

And here it is finshed and boxed, the green connector on the back is so I can make different cables (for different sources) and just plug it in, I changed it from the white one in my other pics because the white one was a bit flaky.

Very pleased with this board, I might buy another one. (Using on NTSC A1200 btw).

 

[johnim]

Nice work mate very tidy

 

[BEANZ]

Anyone got this working with a toastrack zx spectrum 128?

I made a cable today using an 8 pin din plug

Blue wire to pin 8
red wire to pin 7
green wire to pin 6
Grey - composite sync to pin 4
Black - ground pin 2.

No joy, just corrupted video.

EDIT:

Ah never mind I got it, just needed to change the video on the board as I had it on higher res for the Amiga...looks great with the speccy, nice solution for using a 128 in NTSC land.

 

[johnim]

looks good on speccy mate

 

[jezuhke]

I have recently made a cable and I just can't get it to work properly. No matter what I do, what settings I use, the image quality is horrible and it flickers every now and then...

On a black screen I get something that looks like snow. I assume that it has to be some sort of interference, but I have tried everything that's there ti try I believe!

Has anyone come across the same issues? I have only one board and I don't have a way of comparing with another...