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Hi all,
trying to connect an 17" LCD to my Schneider CPC 6128 via the GBS 8200..
I have followed the instructions in the manual and connected the wires according to : https://www.octoate.de/articles/connect-cpc-to-vga-display/
The menu of the GBS 8200 is displayed, but beyond that I only see "no signal" on the screen.

Any idea what the problem is?
I suppose after all my testing that the GBS is broken.

Thanks

Hello,

I don't know if this will help you.

Here's a tutorial in French from @Millsticks which performed the same operation :

Thank You ... unfortunately I see no difference to what I have done.

This may be the most stupid question I've ever asked online, but... Have you selected the correct input in the GBS8200 menu? Because even if only the ground and sync (or green signal) were connected, the GBS would detect a signal. If it's not detecting anything, then we need to go back to the basics.

Bryce.

I tried the auto scan several times and set the input to RGBS via the select input button.
No signal ...

Thanks

can you take some pictures how you connected it?

Sure ... please see attached pictures

It has been quite some while so I don't remember the exact setup, but the CPC only has composite sync and no separate sync for H and V. You probably need to connect the sync on the monitor connector to the grey wire and leave the yellow cable untouched. 

Once it is working I would strongly recommend to install the GBSControl mod as it will make the GBS 8200 much more compatible and reduce lag significantly. 

...this is my working config on the GBS8200

Yes ... that's what I did.

I have already ordered another GBS. 
Hope that this one will work. 
Keep you posted 😉

Quote from: Strike4711 on 22:06, 24 October 23Yes ... that's what I did.

From the article you linked:-

 (https://i.imgur.com/7nnfmKW.png)

Quote from: lister_of_smeg on 12:21, 26 October 23

Quote from: Strike4711 on 22:06, 24 October 23Yes ... that's what I did.

From the article you linked:-

 (https://i.imgur.com/7nnfmKW.png)

Yes ... that's clear.

The new board arrived today.
And ... it works  :D
The picture has some minor noise but OK for the first test.
I think I will switch to a VGA cabel also on the input side.
Suppose that with the correct shielding it will be better.

Eto has mentioned a mod for the GBS. What mod are you referring to?

Thanks again guys for your support.

Quote from: Strike4711 on 18:51, 28 October 23Eto has mentioned a mod for the GBS. What mod are you referring to?

GBS Control mod

https://ramapcsx2.github.io/gbs-control/
https://www.youtube.com/watch?v=fmfR0XI5czI

On the CPC the most important aspect is probably, that it will support many more games that otherwise won't sync correctly. E.g. Ghosts'n Goblins is unplayable with an unmodified GBS. 

Thanks ...👍

the current setup ...

Nice case... self made/printed?

Ja ... 3D printed. Files from the Web.

Quote from: eto on 12:26, 30 October 23

Quote from: Strike4711 on 18:51, 28 October 23Eto has mentioned a mod for the GBS. What mod are you referring to?

GBS Control mod

https://ramapcsx2.github.io/gbs-control/
https://www.youtube.com/watch?v=fmfR0XI5czI

On the CPC the most important aspect is probably, that it will support many more games that otherwise won't sync correctly. E.g. Ghosts'n Goblins is unplayable with an unmodified GBS.

Has somebody already tested it for a CPC?

Quote from: HAL6128 on 15:23, 27 November 23Has somebody already tested it for a CPC?

Sure... That's why I recommend it.

With GBSControl mod many more games work. E.g. Ghosts'n Goblins will not work without the mod.

What were the results with Ghost 'n Goblins? Is it a smooth scrolling or somehow distorted or delayed?
Have you also tested it with Edge Grinder (by chance)?

Quote from: HAL6128 on 22:48, 28 November 23What were the results with Ghost 'n Goblins? Is it a smooth scrolling or somehow distorted or delayed?
Have you also tested it with Edge Grinder (by chance)?

Ghosts'n Goblins: runs perfectly with the GBS8200 + GBS Control mod (but not without the mod).
Edge Grinder: I am not 100% sure if I have tested it with the GBS8200 or a different LCD TV. Edge Grinder works, but Super Edge Grinder doesn't. 
Also Relentless will not work with the GBS8200.

I moved recently so I can't give it a try at the moment as my CPCs are not yet set-up.

That is definately a problem with priorities  ;D

I'm using RGBtoHDMIA kit with a 4:3 15hz Benq monitor. Many modern games don't run properly with this setup.
Recenty tried and failed:
Edge Grinder (or Super Edge Grinder not sure) -> very crappy scrolling
Sugar City -> totally unplayable

Why do you use the RGBtoHDMI if you have a 15khz Monitor? Does it only has HDMI Inputs? (that would be very strange).

Why? To get crystal clear perfect picture on this beautiful LCD panel :)
(It has DVI and VGA ports. I'm connecting via mini-hdmi2dvi cable.)

Use a cable from analog to VGA. If the screen is 15Khz you do not need anything else and it just should work. The RGB2HDMI is only required so that you can use 

1. Screens that do not support analog RGB input
2. Screens that do not support 15Khz signals.

If you have both, why even bother to use RGB2HDMI. There is simply no need for it.

That would be great. I will definitely test it.
EDIT: I found this, seems cool: https://www.ebay.co.uk/itm/265725280192

Yes, that should work.

Quote from: dodogildo on 13:43, 01 December 23EDIT: I found this, seems cool: https://www.ebay.co.uk/itm/265725280192 (https://www.ebay.co.uk/itm/265725280192)

Costs per piece are less than £2, probably 10 minutes of labour per piece. That's a great margin. 

And much easier to solder than any cable

I can't find the 6 pin plug anywhere. I find 8 pin plugs which would fit the Plus, but not the 6 pins ones for the CPC. 

Quote from: SerErris on 23:24, 01 December 23And much easier to solder than any cable

Does anyone have any instructions on which pin to solder to which pin? (for RGB to VGA or  to DVI)?

For Scart it's well documented: 
(https://www.cpcwiki.eu/imgs/thumb/7/7d/Cpc_to_scart_rgb_sw.png/600px-Cpc_to_scart_rgb_sw.png)

According to this, it shouldn't even be that difficult:
(https://external-content.duckduckgo.com/iu/?u=https%3A%2F%2Fi.pinimg.com%2F736x%2F24%2Fc9%2Ff4%2F24c9f430722e3059cba08d840f50811e.jpg&f=1&nofb=1&ipt=c8fb97d953d76db22fe4fac16eb2fe3edb605ed8eaaa06605d99496658ca3ea0&ipo=images)
Pin 13 can be either HSync or Composite Sync (which is what we have on the CPC), so connecting the sync signal to pin 13 should work.

That's what I've found. I don't know if it works, and try it at your own risk. But, looking at the ebay adapter and seeing that it doesn't have anything apparently to split the composite sync into hsync and vsync, I think this is the best bet.

Quote from: eto on 00:22, 02 December 23I can't find the 6 pin plug anywhere. I find 8 pin plugs which would fit the Plus, but not the 6 pins ones for the CPC.

no sure where you live.

here are some on Amazon (enough to learn to solder those).
https://www.amazon.de/RUNCCI-YUN-Verbinder%EF%BC%8CDIN-Kabelanschluss-Lautsprecher-Stecker%EF%BC%88schwarzem/dp/B08SK1L83S/ref=sr_1_3?keywords=din+stecker+6+polig&qid=1701515688&sr=8-3

Ah I see, you live in Germany:

So here we go:
https://www.ebay.de/itm/224597280683?chn=ps&_trkparms=ispr%3D1&amdata=enc%3A1H7Z6Gvg7QPSE4Ygzp1QCNQ54&norover=1&mkevt=1&mkrid=707-134425-41852-0&mkcid=2&mkscid=101&itemid=224597280683&targetid=1716911581919&device=c&mktype=pla&googleloc=9044389&poi=&campaignid=17943303986&mkgroupid=140642150118&rlsatarget=aud-1158329636859:pla-1716911581919&abcId=9301060&merchantid=111240381&gclid=Cj0KCQiAyKurBhD5ARIsALamXaFghzXtFvXW9PZGMY0zxBj6rtmQmP0hEH0Ei6WOIn_bUBD_6tYflBMaArCTEALw_wcB

https://www.ebay.de/itm/224597280683?chn=ps&_trkparms=ispr%3D1&amdata=enc%3A1H7Z6Gvg7QPSE4Ygzp1QCNQ54&norover=1&mkevt=1&mkrid=707-134425-41852-0&mkcid=2&mkscid=101&itemid=224597280683&targetid=1716911581919&device=c&mktype=pla&googleloc=9044389&poi=&campaignid=17943303986&mkgroupid=140642150118&rlsatarget=aud-1158329636859:pla-1716911581919&abcId=9301060&merchantid=111240381&gclid=Cj0KCQiAyKurBhD5ARIsALamXaFghzXtFvXW9PZGMY0zxBj6rtmQmP0hEH0Ei6WOIn_bUBD_6tYflBMaArCTEALw_wcB

https://www.reichelt.de/din-stecker-6-polig-mas-60-p11200.html?PROVID=2788&gclid=Cj0KCQiAyKurBhD5ARIsALamXaESg9A8iQchl7V3jqpRINb6uV5T3XtW-7soVPALK9gJHekWm8oFAkoaAkI3EALw_wcB

https://www.adapterwelt.net/p/din-stecker-diodenstecker-6-polig

Quote from: SerErris on 12:15, 02 December 23here are some on Amazon (enough to learn to solder those).

Those are normal plugs to create cables, I have a lo of them here. But those are not the ones you can solder on a PCB. See attached a comparison of a 8 pin connector cable vs. PCB.

Quote from: robcfg on 11:47, 02 December 23That's what I've found. I don't know if it works, and try it at your own risk. But, looking at the ebay adapter and seeing that it doesn't have anything apparently to split the composite sync into hsync and vsync, I think this is the best bet.

yes, the PCB will be easy to make. You probably can get >50 PCBs (panelized), maybe even 100 from JLCPCB for about €6 incl. shipping. The VGA connectors are also easy to get. Just the 6pin DIN connector with option to put on a PCB seems not so easy to source. But let's see, if maybe someone finds them...

I recently made an adapter for the Atari ST. It's bigger and more complicated with more elements and it's still just a few € in total.

Quote from: eto on 12:37, 02 December 23

Quote from: SerErris on 12:15, 02 December 23here are some on Amazon (enough to learn to solder those).

Those are normal plugs to create cables, I have a lo of them here. But those are not the ones you can solder on a PCB. See attached a comparison of a 8 pin connector cable vs. PCB.

Wouldn't they be basically the same but just needing to remove the tension reliever bit?

Quote from: robcfg on 12:50, 02 December 23Wouldn't they be basically the same but just needing to remove the tension reliever bit?

Footprint is identical but the metal shield would be missing. At least for stability I would prefer the real PCB version. 

Quote from: robcfg on 11:47, 02 December 23Pin 13 can be either HSync or Composite Sync (which is what we have on the CPC), so connecting the sync signal to pin 13 should work.

Yes, it seems on CPC there's only 1 syc (composite) and it should most probably go straight to Pin 13 on VGA.
Thank you. I'll try this.

Ah, now I do understand.

Here is another Schematic:
https://cpcwiki.de/forum/index.php?topic=735.0


What is the name of this pcb solderable version? I cannot even find the 8 pin  (not that it helps).

Quote from: SerErris on 13:16, 02 December 23What is the name of this pcb solderable version? I cannot even find the 8 pin  (not that it helps).

Probably not the real name but that's how they are describes on AliExpress:

"DIN Male Plug Header Solder PCB Vertical Circular Push-Pull Power Connector Machined Contacts"
https://de.aliexpress.com/item/1005002071264550.html

It's the only source I found both for the Amstrad Plus connector and the Atari ST connector.