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 Post subject: Re: GBS 8200/8220 CFW Project
PostPosted: Wed Mar 18, 2020 12:18 pm 


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if they are willing to lie in the description, why not lie in the DMs?


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 Post subject: Re: GBS 8200/8220 CFW Project
PostPosted: Wed Mar 18, 2020 12:24 pm 


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Gunstar wrote:
There is a bunch more of cheap GBSs on eBay, I messaged about 6 sellers, some listings were changed but only this dude got back to me:
Image
I found three sold in his feedback, although one didn't turn up for a customer. Who wants to roll the dice :D

Tried one. Never received. Asked for refund.


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 Post subject: Re: GBS 8200/8220 CFW Project
PostPosted: Wed Mar 18, 2020 12:29 pm 


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maxtherabbit wrote:
if they are willing to lie in the description, why not lie in the DMs?


That's a good point. There is that one customer who did get a cheap GBS which would make me inclined to give them a shot, I never found any feedback from the other cheap sellers...but then you can make up feedback too. Not saying it ain't a gamble!

@Fox Cunning, from this seller?


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 Post subject: Re: GBS 8200/8220 CFW Project
PostPosted: Wed Mar 18, 2020 12:39 pm 


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Gunstar wrote:
maxtherabbit wrote:
if they are willing to lie in the description, why not lie in the DMs?


That's a good point. There is that one customer who did get a cheap GBS which would make me inclined to give them a shot, I never found any feedback from the other cheap sellers...but then you can make up feedback too. Not saying it ain't a gamble!

@Fox Cunning, from this seller?

Not the same seller, sorry I forgot to mention it was "one of the many" and indeed slightly cheaper than that.
I guess some may be exploiting the fact that some people won't bother asking for refund for a few pounds, and then creating new accounts when one gets shut down.


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 Post subject: Re: GBS 8200/8220 CFW Project
PostPosted: Wed Mar 18, 2020 12:44 pm 


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Fox Cunning wrote:
Not the same seller, sorry I forgot to mention it was "one of the many" and indeed slightly cheaper than that.
I guess some may be exploiting the fact that some people won't bother asking for refund for a few pounds, and then creating new accounts when one gets shut down.


That makes sense and worth being aware of. When I messaged a bunch of 'different' sellers four of them copy and pasted the same message back to me


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 Post subject: Re: GBS 8200/8220 CFW Project
PostPosted: Wed Mar 18, 2020 1:08 pm 



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For now, just assume all these sales at a third of the usual price are fake.
If it's about $13 to $15 or up, it will be fine :)


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 Post subject: Re: GBS 8200/8220 CFW Project
PostPosted: Wed Mar 18, 2020 2:04 pm 


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@Rama Can GBS control read inputs on the physical pcb buttons? I was thinking it would be nice to have the freeze-frame feature on a button, using my phone is a little imprecise. If not, could one be wired up to the ESP8266?


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 Post subject: Re: GBS 8200/8220 CFW Project
PostPosted: Thu Mar 19, 2020 1:33 pm 



Joined: 08 Mar 2017
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They're not connected by my default build instructions, but sure, that can be done.
You need to ping out the connection and (maybe a little difficult), find a free GPIO on the ESP8266.
Then just read the GPIO (debounce it!), and tie whatever feature you want to it :p

Edit: This should help.
Image


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 Post subject: Re: GBS 8200/8220 CFW Project
PostPosted: Thu Mar 19, 2020 3:54 pm 


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This stuff is way over my head haha. Something like soldering a wire from pin12 (Down button?) to a free GPIO pin on the ESP8266...and then...learn programming T_T


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 Post subject: Re: GBS 8200/8220 CFW Project
PostPosted: Thu Mar 19, 2020 5:02 pm 



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Sounds like a plan!


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 Post subject: Re: GBS 8200/8220 CFW Project
PostPosted: Sat Mar 21, 2020 6:50 pm 



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Posts: 20
rama wrote:
Yeah, I also got aluminium something.
Open a case and don't accept his 30% or 70% refunds.
It's a scammer :/


Funny, bought from the same guy. Got nothing but a tracking number that didn't do anything. Got refunded though, not sure what kind of strange scammer this is. Went ahead and ordered from Amazon, got a V3 from 2015. Is that an okay rev or should I return it?


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 Post subject: Re: GBS 8200/8220 CFW Project
PostPosted: Sat Mar 21, 2020 6:59 pm 



Joined: 08 Mar 2017
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They're all kind of the same, except maybe for the yellow button version.
That one may is missing output filters, and show more jailbars.


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 Post subject: Re: GBS 8200/8220 CFW Project
PostPosted: Sat Mar 21, 2020 7:15 pm 



Joined: 02 Dec 2011
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rama wrote:
They're all kind of the same, except maybe for the yellow button version.
That one may is missing output filters, and show more jailbars.


That was a quick reply, thanks! Jailbars is not something I look forward to.. which rev should I be looking out for instead, v4/v5?

Edit: sorry misunderstood. You mean the yellow button one is crap so all good :)


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 Post subject: Re: GBS 8200/8220 CFW Project
PostPosted: Sun Mar 22, 2020 10:28 am 



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This is the issue. And sorry I didn't warn earlier, when this board appeared. I just recently learned about it.
Image


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 Post subject: Re: GBS 8200/8220 CFW Project
PostPosted: Mon Mar 23, 2020 10:38 am 



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Posts: 20
Ah okay, good to know. But I should be good then, got this:

Image

Now to figure out what hardware mods are recommended for this rev :)


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 Post subject: Re: GBS 8200/8220 CFW Project
PostPosted: Mon Mar 23, 2020 3:08 pm 



Joined: 08 Mar 2017
Posts: 1362
This is my favourite revision, thanks to the video buffer and linear power supply.
It gulps more juice (~4W total), and the video buffer has that quirky charge pump issue, but if those are dealt with, it's great!
The dual output with no dimming of either display is a nice addition.

To deal with the issues:
https://github.com/ramapcsx2/gbs-contro ... l-gbs-8220

Note that the charge pump issue hasn't been investigated fully.
I just slapped a ferrite bead from the parts bin on (plus capacitor), and it solved the wavy image noise that I had.
This really should be done properly one day.


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 Post subject: Re: GBS 8200/8220 CFW Project
PostPosted: Tue Mar 24, 2020 2:45 am 


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Sp33dFr34k wrote:
Ah okay, good to know. But I should be good then, got this:

Image

Now to figure out what hardware mods are recommended for this rev :)
See the below post for a great illustration of the needed mods. It doesnt include th clock gen mod, you'll have to go back further for those pics.

viewtopic.php?p=1399682#p1399682

Sent from my SM-G955U using Tapatalk


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 Post subject: Re: GBS 8200/8220 CFW Project
PostPosted: Tue Mar 24, 2020 10:16 am 


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NoAffinity wrote:
See the below post for a great illustration of the needed mods. It doesnt include th clock gen mod, you'll have to go back further for those pics.

viewtopic.php?p=1399682#p1399682

Good stuff, I have a V4 8200 so I'll try those mods too.



By the way, what's the deal with the archery aluminium inserts?

I got these at the same time as the parts I had ordered, in a separate parcel.
Not instead of, but in addition to.
Image

The seller didn't even want them back.


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 Post subject: Re: GBS 8200/8220 CFW Project
PostPosted: Tue Mar 24, 2020 12:12 pm 



Joined: 08 Mar 2017
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Might this be a genuine inventory mistake? The chat I had with the seller felt like a bot conversation though.


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 Post subject: Re: GBS 8200/8220 CFW Project
PostPosted: Tue Mar 24, 2020 8:11 pm 


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I forgot to mention, but after getting sent Image like so many others, I ended up with a late 2019 model board. Am I correct in that there's not anything particularly essential RE: physical mods aside from adding the WiFi board? I do know about the resistor you twist on/off those two pins near the input depending on if the input is 15kHz or 31 (I don't have anything natively 24, I forget if we need a resistor or not for that stuff), and that ideally I should remove those 3 pots and bridge 'em, but just double checking on any essentials. I'm probably gonna be using a SCART2DVI w/ a DVI-I to 'VGA' dongle for the clean sync input, and that thing is powered by a 5V DC micro USB power supply. What other (if any) voltage should I be feeding the board itself whilst doing that? I have oodles of other barrel jack PSUs to work with. And I'd love to hear other people's opinions on what 'non-essential' mods they've found to be, well, BORDERLINE essential :)
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 Post subject: Re: GBS 8200/8220 CFW Project
PostPosted: Wed Mar 25, 2020 3:42 am 


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^see the link I posted, 3 posts up.

Use a 5v psu, min. 1A. Do not feed it more than 5v or you risk frying the esp.

Sent from my SM-G955U using Tapatalk


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 Post subject: Re: GBS 8200/8220 CFW Project
PostPosted: Wed Mar 25, 2020 8:48 am 


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NoAffinity wrote:
^see the link I posted, 3 posts up.

Use a 5v psu, min. 1A. Do not feed it more than 5v or you risk frying the esp.

Sent from my SM-G955U using Tapatalk


Well, the 5V is powering the SCART2DVI. Unsure if the 5V power is passed thru the DVI-I, especially since I'm using a DVI-I to dsub15 dongle. Just clarifying in case you missed that.
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 Post subject: Re: GBS 8200/8220 CFW Project
PostPosted: Wed Mar 25, 2020 2:10 pm 



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There should be no 5V passed through the dsub15 dongle, as it's a somewhat dangerous option.
It won't hurt to check, of course: https://en.wikipedia.org/wiki/VGA_connector


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 Post subject: Re: GBS 8200/8220 CFW Project
PostPosted: Wed Mar 25, 2020 4:53 pm 


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rama wrote:
There should be no 5V passed through the dsub15 dongle, as it's a somewhat dangerous option.
It won't hurt to check, of course: https://en.wikipedia.org/wiki/VGA_connector


Yeah, I'm fairly certain no power passes through it, DVI-I to dsub15 dongle or not. SCART2DVI is definitely a handy little device, IDK if the Sync Strike allows you to switch the LM1881 between on/off, but the SCART2DVI sure does & has a switchable LPF as well. It's a good deal!

Looking very much forward to getting the wifi board all set up, then proceeding to rock the CFW on my beastly new 34" VGA CRT! It always feels a little redundant, realizing that I use my OSSC's output w/ a Portta HDMI to VGA 90% of the time :p
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 Post subject: Re: GBS 8200/8220 CFW Project
PostPosted: Wed Mar 25, 2020 6:26 pm 


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rama wrote:
There should be no 5V passed through the dsub15 dongle, as it's a somewhat dangerous option.
It won't hurt to check, of course: https://en.wikipedia.org/wiki/VGA_connector

+5VDC on pin 9 for DDC has been part of the VGA "spec" since the 90s, how is that dangerous?


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 Post subject: Re: GBS 8200/8220 CFW Project
PostPosted: Wed Mar 25, 2020 7:17 pm 


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kitty666cats wrote:
Looking very much forward to getting the wifi board all set up, then proceeding to rock the CFW on my beastly new 34" VGA CRT!


Pics or it didnt happen! :D

Sent from my SM-G955U using Tapatalk


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 Post subject: Re: GBS 8200/8220 CFW Project
PostPosted: Sat Mar 28, 2020 2:27 am 



Joined: 27 Dec 2019
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rama, for sources 240p would not be nice a x1200 preset (x5)? Is that possible?

Great work on GBSControl project.


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 Post subject: Re: GBS 8200/8220 CFW Project
PostPosted: Sat Mar 28, 2020 4:35 am 


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tiochico27 wrote:
rama, for sources 240p would not be nice a x1200 preset (x5)? Is that possible?

Great work on GBSControl project.

according to rama - 1080p already pushes TIVA chip limits, so bigger resolution is apparetly not possible.


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 Post subject: Re: GBS 8200/8220 CFW Project
PostPosted: Sat Mar 28, 2020 9:40 am 


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Fox Cunning, I bought the same item and after many abusive eBay messages I got my money back. What a troll.

on another note,

I have a problem with my gbscontrol where it will not let me save changes/configuration. I get an error pertaining to there being no location to save the configuration to. I followed the steps from the wiki to a T and everything seems to work really well, except no saving. Has anyone else had this ?
thanks

rama wrote:
Easy question first: Is your SPIFFS configured?


Yes I triple checked that one when before programming the device. The documentation was quite clear on that bit :)
Thanks for the suggestion though.

I will get it out in a day or two and reprogram it anyway just [to be sure].


Last edited by evilsim on Sun Apr 05, 2020 1:59 am, edited 1 time in total.

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 Post subject: Re: GBS 8200/8220 CFW Project
PostPosted: Sat Mar 28, 2020 8:30 pm 



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Regarding more lines, that may be doable still. The question then is, will it look any good?
My displays all won't work beyond 1080p, so there's that as well :p

evilsim:
Easy question first: Is your SPIFFS configured?
https://github.com/ramapcsx2/gbs-contro ... e-settings


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