Re: GBS-8220 RGB TO VGA Converter
Posted: Sat Sep 03, 2011 11:05 am
The video captures on my youtube page are all done from monitor mode.
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GBS-8220 RGB TO VGA Converter
Page 4 of 10
Re: GBS-8220 RGB TO VGA Converter
Posted: Sat Sep 03, 2011 10:52 pm
Order placed
Re: GBS-8220 RGB TO VGA Converter
Posted: Fri Sep 30, 2011 11:44 pm
Mine arrived, and it came as a bare board with no instructions, pinouts, anything... Hrmmm.
Re: GBS-8220 RGB TO VGA Converter
Posted: Sat Oct 01, 2011 8:29 am
Mine came the same way, it's fairly simple to setup and use, if you need any help, just let me know!Dave wrote:Mine arrived, and it came as a bare board with no instructions, pinouts, anything... Hrmmm.
Re: GBS-8220 RGB TO VGA Converter
Posted: Sat Oct 01, 2011 9:06 am
http://www.jammaboards.com/faq/article/ ... up-13.html
Bit of a guide there and also a PDF manual on their website. I also did a wiring guide in Quanta a while back.
Bit of a guide there and also a PDF manual on their website. I also did a wiring guide in Quanta a while back.
Re: GBS-8220 RGB TO VGA Converter
Posted: Mon Apr 09, 2012 10:48 pm
I have got the GBS-8220 board but I have the same sync problems discussed above.
After some investigations, I have discovered that this board is unable to manage the PAL standard video signal with 50Hz vertical sync but only the NTSC 60Hz vertical sync.
The board seems to work properly only with some QLs, maybe because of tolerances of some components on the board or on the QL.
The only way to get this board working with the QL is probably to adjust (increase) the vertical frequency sync output of the QL to the NTSC standard.
Does anyone know how to adjust the vertical sync frequency or how to modify a QL to the NTSC standard ?
Ciao, Gianni
After some investigations, I have discovered that this board is unable to manage the PAL standard video signal with 50Hz vertical sync but only the NTSC 60Hz vertical sync.
The board seems to work properly only with some QLs, maybe because of tolerances of some components on the board or on the QL.
The only way to get this board working with the QL is probably to adjust (increase) the vertical frequency sync output of the QL to the NTSC standard.
Does anyone know how to adjust the vertical sync frequency or how to modify a QL to the NTSC standard ?
Ciao, Gianni
Re: GBS-8220 RGB TO VGA Converter
Posted: Mon Apr 09, 2012 10:52 pm
I never modified any of my QLs(all pal) and didn't have any trouble. Which inputs are you using?
Re: GBS-8220 RGB TO VGA Converter
Posted: Mon Apr 09, 2012 10:54 pm
Just to add I did have to move one of the wires across on the white plug provided.
Re: GBS-8220 RGB TO VGA Converter
Posted: Mon Apr 09, 2012 11:12 pm
I am using the white plug provided, I also did all the mods suggested above.vanpeebles wrote:I never modified any of my QLs(all pal) and didn't have any trouble. Which inputs are you using?
Unfortunately this board seems to be NTSC only, as confirmed by the vendor.
Maybe your board has (luckily) some tolerances on the vertical sync input and is able to lock the PAL video signal.
Re: GBS-8220 RGB TO VGA Converter
Posted: Tue Apr 10, 2012 7:02 am
Odd I use mine successfully with Spectrum +3, +2A, Amstrad CPC, QL, Sam Coupe. All PAL machines (well PALish as in any retros).flyer.gio wrote:I have got the GBS-8220 board but I have the same sync problems discussed above.
After some investigations, I have discovered that this board is unable to manage the PAL standard video signal with 50Hz vertical sync but only the NTSC 60Hz vertical sync.