Hard Drivin Compact - CGA to VGA adapter

[SandyBT]

Same here. Also an HD upright cabinet, see my topic starting with K71**
Upright is NOT exactly CGA ,standard resolution. 15KHz horizontal, a bit off 60Hz vertical i believe.
Cockpit is EGA medium resolution. (works with the schematic of JED RD to VGA adapter)
converting this vga signal to HDMI does not work - Jed tested this with negative result.

for the HD upright CGA:
l also tried the GBS-8200; it doesn't work even that it should according the manual/signal. The auto button crashes the GBS-8200... It just stops responding to button presses.

There are other CGA TO VGA converters out there, even from WEI-YA i'll try one of these, they have more buttons, can't find what they are for but we will see.

All JAMMA boards with RGBC output can be adapted to SCART using simple resistors the lower the signal for SCART/TV. (or with this board to VGA)

 

[offset]

I have a project Hard Driving compact/upright (standard monitor resolution) with a Race Drivin pcb set in it (also compact/upright).

I've thought about the monitor switch, but only to reduce weight as the 25" monitor is at the top of the game. I've not seen any decent converters so I'll probably just keep the crt monitor in there when I put it back together.

I put heavy duty casters on the bottom, thinking about adding some casters on the back of the cabinet so I can lay it down and move it around easier. The game is very tall and very heavy (450lbs).

Video from Richie Knucklez for reference, lol

 

[SandyBT]

indeed this thing is a beast to handle. Is the pcb different from HD?
could you send me some photo's of all pcb's so i can crosscheck this in mine before i might buy someones RD pcb set... thanks

 

[pcjohn]

For the GBS-8200, try putting a 1K resistor inline with the sync line.
I've had to do this with several Atari games both standard and medium
resolution.

Also, search the forums for the GBS-8200 and Mortal Kombat. I think you
have to twiddle with the vertical position (set it over 29 ?). I had to do this
to get one to sync with a Toobin. Also, try the display output settings on
the GBS, 640x480, 800x600, 1024x768. Sometimes one will work better
than the others.

JD

Same here. Also an HD upright cabinet, see my topic starting with K71**
Upright is CGA standard resolution. 15KHz horizontal, a bit off 60Hz vertical i believe.
Cockpit is EGA medium resolution. (works with the schematic of JED RD to VGA adapter)
converting this vga signal to HDMI does not work - Jed tested this with negative result.

for the HD upright CGA:
l also tried the GBS-8200; it doesn't work even that it should according the manual/signal. The auto button crashes the GBS-8200... It just stops responding to button presses.

There are other CGA TO VGA converters out there, even from WEI-YA i'll try one of these, they have more buttons, can't find what they are for but we will see.

All JAMMA boards with RGBC output can be adapted to SCART using simple resistors the lower the signal for SCART/TV. (or with this board to VGA)

 

[pcjohn]

One other thing comes to mind about using an LCD - is the picture
inverted (flipped) from the game ? Because if it's not you can't use
an LCD in a compact since the picture will be reversed.

JD

 

[offset]

My RD pcb set is still packed in a box (sold all my games except for this project) for my move from St Louis to Florida. I couldn't abandon this project and sell it off, was afraid it would never get finished and just sold for parts. Sold all of my other games complete.

Original restore thread is here - https://forums.arcade-museum.com/showthread.php?t=357641

RD is a 4 pcb set, not exactly sure how to tell difference between cockpit (med res monitor) versus compact/upright (std resolution monitor). I'll see if I can find it this weekend and take some pictures.

More information about the hardware here
http://www.system16.com/hardware.php?id=770

indeed this thing is a beast to handle. Is the pcb different from HD?
could you send me some photo's of all pcb's so i can crosscheck this in mine before i might buy someones RD pcb set... thanks

 

[offset]

Good point about inverted picture. The monitor is at the top and reflects off a mirror at 45 degrees.

Although, I remember when I hooked the pcb up to my sony pvm, the picture was fine, so not sure if the monitor itself was inverted but not the signal from the pcb.

See the picture from my restore thread showing the sony pvm picture.
https://forums.arcade-museum.com/showpost.php?p=3181623&postcount=13

One other thing comes to mind about using an LCD - is the picture
inverted (flipped) from the game ? Because if it's not you can't use
an LCD in a compact since the picture will be reversed.

JD

 

[SandyBT]

no the image comes out straight. When i convert it to lcd the monitor will be put directly after the window leaving the wirror behind. allrady tought of that issue.
You will be darn close to it i guess. it is duable.
For the syncing of this cabinet it is not CGA. it is slightly off.
Still need to scope this to make sure. the resistor trick i will try out. I allready put once a 5K pot in between and fooled around with no change but i will try with the GBS in between. i think the ACV-011 of weiya will be a better converter, it has a more wide range of sync Hz. I dont think the Horizontal sync is an issue, i think it is the vertical part that is not in range with these converters. Still having contact with the engineer.

The 4th board for a Race drivin upright looks like what? can some one post a pic of it? never mind found it.
I'm surely interested in a set of these so i can switch arround

 

[pcjohn]

I found the notes for the sync issue with the Mortal Kombat.
Try going to the Geometry menu of the GBS, and change the
vertical position to 29. I had to do this to get it to work
properly on a Toobin.

JD

no the image comes out straight. When i convert it to lcd the monitor will be put directly after the window leaving the wirror behind. allrady tought of that issue.
You will be darn close to it i guess. it is duable.
For the syncing of this cabinet it is not CGA. it is slightly off.
Still need to scope this to make sure. the resistor trick i will try out. I allready put once a 5K pot in between and fooled around with no change but i will try with the GBS in between. i think the ACV-011 of weiya will be a better converter, it has a more wide range of sync Hz. I dont think the Horizontal sync is an issue, i think it is the vertical part that is not in range with these converters. Still having contact with the engineer.

The 4th board for a Race drivin upright looks like what? can some one post a pic of it? never mind found it.
I'm surely interested in a set of these so i can switch arround

 

[SandyBT]

I found the notes for the sync issue with the Mortal Kombat.
Try going to the Geometry menu of the GBS, and change the
vertical position to 29. I had to do this to get it to work
properly on a Toobin.

JD

So scoped this sync Signal. Yellow line is csync out of the board. Blue after the 1k resistor. Fed like that into gbs 8200 v4.0. Playing arround like 30 minutes. Once i saw the screen in a flash.
Then no more. I need to hard reset gbs Evert time i change something. Second pic is all the wat out to see the vsync. Dont know much of scoping. I only use it to see if the output triggers on IC's.

Tryed gbs on streetfigter and mk1. The gbs is shit! Scart works right away on them.


Sorry for typos. Phone keeps correcting to dutch

 

[SandyBT]

As i can see on the toobin schematics is outputs separate H and V Signal.
Why doesnt a engineer Dessign a board with pots on it simular to a wg k7000 chassis that outputs a Signal we can use on compositie video. That would sell like hel. Every tv, lcd can be used.

 

[pcjohn]

As i can see on the toobin schematics is outputs separate H and V Signal.
Why doesnt a engineer Dessign a board with pots on it simular to a wg k7000 chassis that outputs a Signal we can use on compositie video. That would sell like hel. Every tv, lcd can be used.

Toobin' does have composite sync. It's in the schematic, pin 9 on the video connector
I think. It unfortunately is positive sync so I used a 74Ls04 to invert it to make
it compatible with the GBS-8200.

Come to think of it, is Hard Drivin' positive or negative sync ? Positive sync
won't work with the GBS-8200.

After a little tweaking the GBS-8200 doesn't look that bad with medium
resolution games.

JD

 

[SandyBT]

Toobin' does have composite sync. It's in the schematic, pin 9 on the video connector
I think. It unfortunately is positive sync so I used a 74Ls04 to invert it to make
it compatible with the GBS-8200.

Come to think of it, is Hard Drivin' positive or negative sync ? Positive sync
won't work with the GBS-8200.

After a little tweaking the GBS-8200 doesn't look that bad with medium
resolution games.

JD

Negative i asume hence it needs to be connected to the negatieve sync of the wg k7000 chassis. It works with my preplacement tube and a cheap tweaked Chinees chassis. For future use i want that that it works with vga or scart.

 

[SandyBT]

ordered a RGB to NTSC converter from austria. see what that gives.

https://www.converters.tv/products/cga_to_pal/68.html

 

[Sitwell]

Race Drivin' Cockpit

If I can add my two cents, I eventually got the GBS-8200 working with the cockpit version of the game, but I was dissatisfied with the dim, blurry picture quality. Also, I could never get the screen cropped properly without cutting off the sides of the image.

I then tried an OSSC scan converter from another project, and wow, it's so much better. These things are expensive, but worth it if you want to go LCD.

Here's video of it working:
https://www.youtube.com/watch?v=P_AMbyN4xDk

 

[SandyBT]

That Looks very nice. Cockpit uses another resolution monitor than my hard drivin. Got it working with a tube and chassis swap. Thanks for yuor reply

 

[patoperales]

ordered a RGB to NTSC converter from austria. see what that gives.

https://www.converters.tv/products/cga_to_pal/68.html

Hi SandyBT

Sorry for asking in this post, I know it's been a long time..but I'm dealing with this same project, trying to convert video output for a Race Drivin Comact/upright board. GBS8200 is not working at all.

Have you finally get this thing converted to VGA?
THANKS!