GBS-8220, 23DB Connectors and Leads - Page 20

mikele · 23 August 2016, 09:00

Quote:

Originally Posted by tekopaa

http://www.aliexpress.com/item/2015-...08.8.14.CiUo0A

new adapter is out

anyone tried this? Maybe they've improved quality a bit.

DerSheriff · 10 September 2016, 15:33

Quote:

Originally Posted by mikele

anyone tried this? Maybe they've improved quality a bit.

It seems to do the opposite of a GBS-8200. VGA signals to CGA/EGA/etc.

15 December 2016, 15:50

New here, and was wondering if theres a fix for the vertical jail bars on the GBS8200 (I have the 2013.10.12) yet? I plan on changing C11 for a tantalum bead, and replacing the electrolytics, but other than that, I don't know what to do to fix the jailbars

Higgy · 15 December 2016, 18:11

Hi,

There is a newish fix: [ Show youtube player ]

I have done it but in the rush i did not do a before/after test and i had not used my GBS8220 for a while.

It seemed to help with 'snow speckles'. I had already changed the electrolytics for branded versions.

15 December 2016, 20:25

I'll do this copper tape fix too then. The biggest issues I have is the vertical jailbar interference and white speckles on 480p sources.

Here's a couple of photos I took to show the jailbars

danko · 19 April 2017, 18:46

Hi,have a this board what is the polarity for PSU 5v 2A?

06 March 2018, 10:28

Quote:

Originally Posted by danko

Hi,have a this board what is the polarity for PSU 5v 2A?

+ in the middle

btw my experience with the GBS 8220 bought off ebay is that it does not work on any of my A500s (rev 6A PAL). Screen is garbled on Samsung S27B350 no matter what I do. FWIW it works on my XBOX ... component input

Higgy · 12 April 2018, 17:05

There are interesting developments happening again with the GBS82**

The original Raspberry Pi mods ended, but it has been taken up again quite recently. Now you can run custom firmware with a wireless based Arduino

https://github.com/ramapcsx2/gbs-control#

RiP · 02 June 2018, 07:42

Got my GBS-8220 but those two legs are soldered together

Jope · 04 June 2018, 09:05

Judging by the copper under those legs, they are supposed to be together anyway.

Higgy · 04 June 2018, 13:25

They should not be connected - well visibly.

The chip pin out has those two pins listed as P1.2 and P1.3 so they might not actually be connected within the chip.

If you are going to use Custom Firmware and piggyback off the chip you will want to clear the solder off, or the chip socket will not fit.

RiP · 08 June 2018, 10:42

Difference between A520 vs GBS8220 looks like SD vs 4K

I'll try AD724 later too.

I did the shielding too, seems fixed some problems but jailbars are still visible somehow.
Grounded shielding didn't make any difference for me. I should put a small 5V fan on the heatsink too.

No way to get rid of the annoying deinterlacing of GBS?

I also found this, not sure if it works with amiga or not:
http://www.hollandcomputers.com/stor...ors-p10889.htm

Edit: I recommend to add a 5V fan on the heatsink. That big chip makes the whole board hot.

12 June 2018, 01:29

Hello,

Brand new here, would like to confirm that GBS-8200 v4.0 does indeed work with PAL Amiga 500 Rev. 8A.1. Just got this one going after 20+ years sitting in a closet.

http://imgbox.com/ivTDCGR7
http://imgbox.com/NrnuyazT

Now on to recapping

RiP · 12 June 2018, 08:08

Quote:

Originally Posted by KOzOK

Hello,

Brand new here, would like to confirm that GBS-8200 v4.0 does indeed work with PAL Amiga 500 Rev. 8A.1. Just got this one going after 20+ years sitting in a closet.

http://imgbox.com/ivTDCGR7
http://imgbox.com/NrnuyazT

Now on to recapping

Welcome

It seems to be purple somehow..

P.S. Yours is A500+ not A500

13 June 2018, 04:38

Quote:

Originally Posted by RiP

Welcome

It seems to be purple somehow..

P.S. Yours is A500+ not A500

Thanks, good to be here. I like it here, seems like a chill place with tons of great info to dig through.

I have not done any shielding, or image adjustment as of yet. Plus I'm bit color blind, so no big deal

Also, this is not A500+. It is a rare beast that was build on A500+ board with proper chips, but 512K Ram and no real time clock or batter, and 1.3 Kick.

RiP · 13 June 2018, 08:17

Quote:

Originally Posted by KOzOK

Thanks, good to be here. I like it here, seems like a chill place with tons of great info to dig through.

I have not done any shielding, or image adjustment as of yet. Plus I'm bit color blind, so no big deal

Also, this is not A500+. It is a rare beast that was build on A500+ board with proper chips, but 512K Ram and no real time clock or batter, and 1.3 Kick.

Try to increase the Blue channel here or reduce Red:

Interesting, you can also add those missing chips easily.

Edit: buy a DB23 connector or use DB25 and cut two pins of it for RGB video out, better that floating wires

Don't forget to use a resistor for the CSync:

danko · 18 March 2019, 21:24

Hi,i have this board

HD 9800 V5.0
2015.01.15

There is someone who has tested?

jkg · 19 March 2019, 08:14

Yes, I have HD 9800 V5.0 (2015.01.15). I tried the copper tape fix but did not see much improvement (as I recall). But maybe it's more stable than the original. I don't think I have seen white noise on it - but I've never used it regularly...

danko · 19 March 2019, 09:23

Thanks, at the moment do not have a 5v 2a psu, works with 12v 1a supply?

RiP · 19 March 2019, 15:45

Quote:

Originally Posted by danko

Thanks, at the moment do not have a 5v 2a psu, works with 12v 1a supply?

Use only 5V or you'll break it.

15 December 2016, 20:25	#385
AndehX Posts: n/a	I'll do this copper tape fix too then. The biggest issues I have is the vertical jailbar interference and white speckles on 480p sources. Here's a couple of photos I took to show the jailbars Attached Thumbnails

04 June 2018, 13:25	#391
Higgy Registered User Join Date: Jan 2014 Location: Somerset, UK Posts: 547	They should not be connected - well visibly. The chip pin out has those two pins listed as P1.2 and P1.3 so they might not actually be connected within the chip. If you are going to use Custom Firmware and piggyback off the chip you will want to clear the solder off, or the chip socket will not fit. Last edited by Higgy; 04 June 2018 at 13:30. Reason: Added pics of Custom Firmware module

08 June 2018, 10:42	#392
RiP Q Join Date: Feb 2017 Location: CD0: Posts: 139	Difference between A520 vs GBS8220 looks like SD vs 4K I'll try AD724 later too. I did the shielding too, seems fixed some problems but jailbars are still visible somehow. Grounded shielding didn't make any difference for me. I should put a small 5V fan on the heatsink too. No way to get rid of the annoying deinterlacing of GBS? I also found this, not sure if it works with amiga or not: http://www.hollandcomputers.com/stor...ors-p10889.htm Edit: I recommend to add a 5V fan on the heatsink. That big chip makes the whole board hot. Last edited by RiP; 11 June 2018 at 20:02.

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15 December 2016, 15:50	#383
AndehX Posts: n/a	New here, and was wondering if theres a fix for the vertical jail bars on the GBS8200 (I have the 2013.10.12) yet? I plan on changing C11 for a tantalum bead, and replacing the electrolytics, but other than that, I don't know what to do to fix the jailbars

15 December 2016, 18:11	#384
Higgy Registered User Join Date: Jan 2014 Location: Somerset, UK Posts: 547	Hi, There is a newish fix: [ Show youtube player ] I have done it but in the rush i did not do a before/after test and i had not used my GBS8220 for a while. It seemed to help with 'snow speckles'. I had already changed the electrolytics for branded versions.

19 April 2017, 18:46	#386
danko Registered User Join Date: Oct 2009 Location: Italy Age: 45 Posts: 196	Hi,have a this board what is the polarity for PSU 5v 2A?

12 April 2018, 17:05	#388
Higgy Registered User Join Date: Jan 2014 Location: Somerset, UK Posts: 547	There are interesting developments happening again with the GBS82** The original Raspberry Pi mods ended, but it has been taken up again quite recently. Now you can run custom firmware with a wireless based Arduino https://github.com/ramapcsx2/gbs-control#

02 June 2018, 07:42	#389
RiP Q Join Date: Feb 2017 Location: CD0: Posts: 139	Got my GBS-8220 but those two legs are soldered together

04 June 2018, 09:05	#390
Jope - Join Date: Jul 2003 Location: Helsinki / Finland Age: 43 Posts: 9,861	Judging by the copper under those legs, they are supposed to be together anyway.

12 June 2018, 01:29	#393
KOzOK Posts: n/a	Hello, Brand new here, would like to confirm that GBS-8200 v4.0 does indeed work with PAL Amiga 500 Rev. 8A.1. Just got this one going after 20+ years sitting in a closet. http://imgbox.com/ivTDCGR7 http://imgbox.com/NrnuyazT Now on to recapping

18 March 2019, 21:24	#397
danko Registered User Join Date: Oct 2009 Location: Italy Age: 45 Posts: 196	Hi,i have this board HD 9800 V5.0 2015.01.15 There is someone who has tested?

19 March 2019, 08:14	#398
jkg Registered User Join Date: Jun 2014 Location: Norway Age: 46 Posts: 32	Yes, I have HD 9800 V5.0 (2015.01.15). I tried the copper tape fix but did not see much improvement (as I recall). But maybe it's more stable than the original. I don't think I have seen white noise on it - but I've never used it regularly...

19 March 2019, 09:23	#399
danko Registered User Join Date: Oct 2009 Location: Italy Age: 45 Posts: 196	Thanks, at the moment do not have a 5v 2a psu, works with 12v 1a supply?

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