Guide? Gonbes GBS8200 VGA Arcade Game Video Converter

[amiman99]

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.

[amiman99]

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.

[amiman99]

One more pic...

[amiman99]

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.

[amiman99]

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.

[amiman99]

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.