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Review: Gbs 8200 rgb to VGA arcade adaptor.

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  • Review: Gbs 8200 rgb to VGA arcade adaptor.

    I'm sure most of you have read Harrison's thread in this cheap and cheerful Chinese rgb adator on EBay.

    If not have a quick read on Harrison's thread and check out eBay.

    Now my version is the single output 8200 rgb to VGA, the new version has dual VGA output but uses the same board.

    This CGA/EGA/YUV to VGA Arcade Converter PCB allows all types of RGB, EGA, VGA or YUV component signals to be up-converter and display on a 31KHz PC VGA monitor, TFT monitor, LCD display, or HD-TV with VGA connection. No need to set dip switches in order to figure out the specific input frequency as all inputs are detected automatically.

    Supports CGA/EGA/VGA/YUV Component Signal Input
    Supports VGA Output (640 x 480, 800 x 600, 1024 x 768, 1360 x 76
    CGA/EGA/VGA signal auto scan (15KHz, 24KHz, 31KHz)
    YUV Component signal auto scan (480i, 576i, 720i, 1080i, 480p, 576p, 720p, 1080p)
    On Screen Display (English and Chinese)
    Supports image position control & image zoom control
    True digital 24-bit A/D converter for true 16.7-million color conversion.
    Supports ALL types of VGA monitors (CRT, LCD, PDP, Projector, etc)

    Supports ALL types of VGA monitors (CRT, LCD, PDP, Projector, etc)

    Input Power 5VDC +/- 0.5v (2A) P7 or P9

    Input* signal
    14.5kHz - 16.5kHz
    23.5kHz - 25.5kHz
    30.5kHz - 32.5kHz
    Auto scan
    P3 or P11 or P10
    30.5kHz - 32.5kHz
    Auto scan
    P10 or P11
    30.5kHz - 32.5kHz
    Auto scan
    P10 or P11
    Auto scan
    Auto scan
    Output signal
    1024*768,1360*768 P4 and P13
    User controls Input Switch, Image Zoom, Image Position,
    Output Resolution ,R\G\B gain adjust. Menu Key
    R\G\B VR
    PCB Dimensions:
    115mm (W) x 105mm (D) x 20mm (H)

    In the box:

    VGA board
    Short wiring loom
    Mini power connector.

    On the Amiga.

    The first thing you need to do is wire the thing up, you have to wire up an rgb 23 pin socket from the Amiga ( for native screens I.e whdload games ) to the VGA adaptor - its not hard and supprisinly few wires are connected.

    The Amiga screen output is then magically converted into a VGA output to your LCD tv / monitor or even back in to the Amiga for an rtg card input ( Picasso 2 and others )

    So wiring done , power?

    Some people have wired this to the rgb socket and used the power from that, others use a small psu. I have tried both.

    Results / use ?

    Personally I use 1024x768 and English menus of course , I haven't played with any other setting apart from cropping the screen size to suit my Samsung tv.

    The results are generally good , the picture is mostly stable but I have some wobble at the bottom of the screen that is constant no matter how I size the picture and I also have some ghosting on the mouse pointer , seemingly in a square area around the pointer - no matter where on screen.

    Does any of this matter ?

    No not really it means I can pass through and auto switch from VGA Picasso to VGA native Amiga without me doing anything. Joy


    It's cheap , you need to make an rgb lead and buy a psu or power from the rgb. So do I recommend it. Yes I do but if something else came along and offered a similar price but more stable picture, I would buy that.

    I have yet to try it on another tv and with another Amiga but I briefly tried it on a 500 and its just as happy to display.

    Tested system

    Samsung LCD tv.


    Pics & vid to follow.

    my vid
    Attached Files
    Last edited by Justin; 2 February 2012, 08:51.

  • #2
    great review but how does it handle 50hz inputs? does it output a 50hz vga signal or it destroys vsync with a 60hz standard vga conversion?
    Aacheron and slk486 are my heroes
    A1200D mfilos ed. : ACA 1231/42 , Indivision MK2 , IDEfix Express , Subway , PicoPSU 120w custom 3.9 ROM/OS


    • #3
      I have no idea, how do I test that?


      • #4
        Originally posted by mjnurney View Post
        I'm sure most of you have read Harrison's thread in this cheap and cheerful Chinese rgb adator on EBay.

        If not have a quick read on Harrison's thread and check out eBay.
        do you have a link to it?
        did you just use analog RGB and composite sync?


        • #5

          here mate
          Gone but not forgotten. RIP John.


          • #6
            cheers, I searched for various things (apparently not the right things)
            I reckon I'll order one of those soon


            • #7
              Nice review Mike!

              I've been thinking about buying one of these for a while since it seems like it's a Swiss Army Knife when it comes to video needs for people who collect and use retro computing stuff.

              This might be a stupid question, but, does the unit handle both NTCS and PAL signals?
              "some of my answers you will understand, and some of them you will not. Concordantly, while your first question may be the most pertinent, you may or may not realize it is also the most irrelevant."
              - The Architect


              • #8
                You mean pal / NTSC input ( Amiga ) or output ?

                The output is VGA so as far as I know I doesn't matter..

                I have used it in both NTSC and pal on my A2000 with no problems on my Samsung LCD tv, in fact the tv prefers NTSC to pal for some reason on the Amiga.



                • #9
                  How is the power for it,its from the Amiga right,A lot of people say is not a good idea to power it with the Amiga..??
                  A600 A1200,A500,CD32,C64 in C case,C64 Compact,SD2IEC and UK1541,C64DTV,Atari VCS,Atari 800XL/130XE,1010,1050,Atari 520STFM,Acorn Electron,ZX spectrum,ZX Spectrum X2+2.Mattel Aquarius,Sega Mega Drive/CD1 and 2,Sega Saturn,Dreamcast,Sony PS Original x2,Action Reply card for PS,PS1 White,PS2 Slim x2,PS3 x2,PS4,PSP Fat,SP Vita,Xbox Original,Xbox360 Siim x2,NDSL,NDSiXL Mario,3DS,2DS.


                  • #10
                    You're bound to break something eventually if you take it from a port, too much amps.

                    Tapping the power connector is probably fine if you do it in the right place.


                    • #11
                      My memory's a little hazy here but it also might be worth mentioning that some revisions of amigas (I think it was the A1200) were missing some of the power outputs on the RGB port...
                      4 x 48K ZX Spectrums | 3 x ZX81's | 3 x A500+ | 2 x A500 v1.3 | Acorn A3010 | Amstrad ALT-286 16MHz 170Mb HD | Twinhead 486SX 25 MHz 4Mb Laptop (Dos6.22 Win3.11) | Raspberry Poo running OpenELEC XBMC | Arduinos running water harvester and hot tub


                      • #12
                        i use both power options and I've had no issues. if you are getting problems try a recommended psu. i used a 1amp psu first and as i recall i had was a while back I've forgotten what.


                        • #13
                          Hi mate

                          Can you tell me tell if I still need to make an rgb cable if I use a amiga video to rgb adapter and just connect using a vga cable.

                          Thank you in advance.
                          Im looking a a Infra red CDTV mouse and CDTV External Hard Drive and Amiga x1000 case or even full unit. Please contact me.


                          • #14
                            no rgb to scart will plug in to a tv without anything else, the vga thingy here is for connecting to monitors (vga)


                            • #15
                              hi limboy777

                              you need to make a cable here 23pin to the wire that comes with the gbs

                              which plugs in behind the vga port

                              then you plug in a 5v 2a psu and a standard vga cable to one of the vga out ports to your tv/monitor

                              Gone but not forgotten. RIP John.


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