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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: XDelusion on December 15, 2014, 08:38:09 PM
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I have seen these boards for sale inside a housing and pre-prepped for the Amiga.
Is there a guide anywhere on how to do this, where to order parts, etc.?
http://www.ebay.com/itm/CGA-EGA-RGB-To-VGA-GAME-Video-Converter-Board-Card-Game-GBS8200-1-VGA-Output/201217269289?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D27538%26meid%3Df891d2237d784bb2aea28a54498b3ccd%26pid%3D100005%26prg%3D11353%26rk%3D4%26rkt%3D6%26sd%3D221591723612&rt=nc
http://www.ebay.com/itm/Amiga-Scandoubler-Flickerfixer-LED-A500-600-1200-1000-2000-3000-4000-CDTV-CD32-/261697309555?pt=UK_VintageComputing_RL&hash=item3cee600b73
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I got one inside of Radio Shack box wired to a 9pin Commodore monitor cable, so you can use your existing monitor cables.
If you need help, I can dig out the pinouts and pics for you.
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I got one inside of Radio Shack box wired to a 9pin Commodore monitor cable, so you can use your existing monitor cables.
If you need help, I can dig out the pinouts and pics for you.
I'm eager for any info anyone can share, thank you!
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You need:
Qty 1 GBS8200
Qty 1 Project box from Radio Shack http://www.radioshack.com/project-enclosure-6x4x2-/2701806.html#q=Project+boxes&start=8
Qty 1 Male (some 1084S monitors need FEMALE, check your cable for correct gender) DB9 connector (Crimp or solder)
File and cutters.
The GBS comes with a cable that you plug in the P11 plug.
You have 6 wires, but we only need 5 of them, RED, GREEN, BLUE, BLACK, and GRAY.
Solder/Crimp the wires as follows (pinouts are for C= 1084 monitor):
Pin 1 to BLACK
Pin 3 to RED
Pin 4 to GREEN
Pin 5 to BLUE
Pin 7 to GRAY
Cut the box.
I used wire cutter and Dremel tool to cut the holes.
Use my pics for reference (don't judge, looks good on the outside)
For PAL and NTSC I use following settings on GBS (When you get it, you'll kow what it means):
HPOS 56
VPOS 16
HSIZE 48
VSIZE 55
CLAMP ST 97
CLAMP SD 00
As far as the buttons, I did not modified them, once you set it, you should not touch them.
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One more pic...
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One more pic....
You could also wire directly to DB23 if you have one, or you could salvage one monitor cable and wire directly to the GBS.
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Thank you very very much!!!
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My guide would be:
1. open bin
2. place gbs in bin
3. close bin
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There is a lot about them on EAB's site, but I agree with Ammo (vide supra)
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hmmm...
http://eab.abime.net/showthread.php?t=66922&page=6
http://www.theisozone.com/forum/viewtopic.php?f=20&t=47226
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GBS is OK for what it does, for $30 what can you expect.
According to the above eab thread you should connect the sync signal via a 560 ohm to 1K resistor.
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And once you count in all the man-hours it takes to get it working, how much does it cost then?
http://www.ebay.com/itm/Amiga-Scandoubler-Flickerfixer-LED-A500-600-1200-1000-2000-3000-4000-CDTV-CD32-/261703668857?pt=UK_VintageComputing_RL&hash=item3ceec11479
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And once you count in all the man-hours it takes to get it working, how much does it cost then?
http://www.ebay.com/itm/Amiga-Scandoubler-Flickerfixer-LED-A500-600-1200-1000-2000-3000-4000-CDTV-CD32-/261703668857?pt=UK_VintageComputing_RL&hash=item3ceec11479
85 GBP. More expensive and crappier than Indivision. Only possible reason I could see anyone wanting this is if they had like, 10 Amiga's, and didn't want to buy a scandoubler for each of them. Although anyone who can afford 10 Amiga's obviously isn't hurting for money. But, to each their own! ;) :pint:
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I'm not sure why some people have problems with their GBS8200 boards.
I got it working in minutes after realizing that it may work on my Amiga. The main reason I got the GBS is for my NEO GEO MVS, so I can use any VGA monitor.
Here is my first post on EAB from 2010: http://eab.abime.net/showthread.php?t=56760
I did have problems running in PAL mode which I solved some time later with menu adjustments.
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It "works" in that it will display a signal on a VGA monitor... but the RF and compo%&$#?@!%&$#?@!%&$#?@!%&$#?@! work too....
I have two Amigas, a Sega Mega Drive and Super Nintendo, all of which I would like to connect to a modern TV using their RGB output, and I still wouldn't use a GBS for this, and I already own one!
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Slowly getting there with the GBS82XX boards, with some other contributors we are improving the board.
The speckle problem was caused by two contributing factors, SDRAM running at max speed and the Amiga's 5V CMOS signals. Slowing the SDRAM to 128 MHz (from 162) fixed most speckles. There is enough video bandwidth to upscale to 1280x1024. The 5V sync signals from the Amiga will damage the 3.3V GBS-82XX, in 1-2 years time! A 680 ohm resistor reduces the level nicely.
A 5V 750-1000mA switchmode power supply is fine. With the GBS-8200, a 500mA will do. Only one capacitor needs to be replaced, it's the 10uF ceramic by IC5 (1.8V supply), it must change to a Tantalum. This fixes the power supply issues as the converter was unstable with a zero in the feedback network caused by a ceramic.
Adding details to my blog; http://ianstedman.wordpress.com/gbs-82xx-experiments/
Turning off the bob and weave de-interlacer and line doubling provides nice 240/288p progressive video. For interlace modes we need to re-enable the de-interlacer.
The next steps are fine tuning of settings and some noise removal.
A firmware update is planned for the board. If you have a Raspberry Pi, you can experiment today ;)
The chip in the GBS-82XX is very capable and reasonably well documented, it the configuration firmware that lets it down. It can up-scale to HD modes.
Ian
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I'm saving for an xrgb mini framemeister. General scandoublers suck at fast movement - extreme ghosting, and the 'comb' effect makes some games not only look ugly, but even barely playable (Uridium 2 is a nice test).
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Since these are 5v, can they be powered by a PC or classic XBOX PSU?
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Since these are 5v, can they be powered by a PC or classic XBOX PSU?
The Framemeister comes with its own power supply.
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The Framemeister comes with its own power supply.
I don't have a Framemeister, only the GBS8200. I can use my power pack (which I bought separately) or connect something to the open ended cable that came with the unit.
I'd like to use one of these for my classic XBOX as well, so I'd like to know if I could power it through that if I put it all in a new case.