NeoVGA FAQ and Order Thread

buaku

Hardened Shock Trooper
Joined
Dec 3, 2007
Posts
437
Wish I would have thought of ribbon cables!

How did y'all attach the NeoVGA to the Neogeo boards?
 

cyd

New Challenger
Joined
Feb 3, 2013
Posts
62
on my mv4f I used a stand off from an old motherboard through one of the slot brace holes. Seen in the lower left of the neovga board.
 

cyd

New Challenger
Joined
Feb 3, 2013
Posts
62
Dave, How long ago? Mike was last active here on 12/31, so you may just have to give him some time.
 

bartre

Haomaru's Blade Shiner
10 Year Member
Joined
Oct 27, 2009
Posts
681
So I'm wanting to set up scanlines on my neovga.
how exactly do those jumpers work?
can they both me active at the same time to give it thicker lines? or are they even/odd?
Basically, should I use two switches (on/off) or one switch (scan0/off/scan1)?
 

Jontox

Quiz Detective
Joined
Jul 19, 2016
Posts
89
Indeed, 2 jumpers to use to obtain 4 different settings.
Here is what it looks like:

Level 0 - Scan Lines

cr7a1bz.jpg

SbVeHS7.jpg


--- ---
Level 1 - Scan Lines

BNQHkz9.jpg

sz98eRZ.jpg


--- ---
Level 2 - Scan Lines

ASe9PjK.jpg

OK96X61.jpg


--- ---
Level 3 - Scan Lines

I9gsPF4.jpg

xU116Fn.jpg
 
Last edited:

tighecg

Armored Scrum Object
Joined
Nov 26, 2013
Posts
257
So I just got around to wiring one of these up. but I do not seem to get any type of response from the monitor I'm testing on. Just a black screen or it is looking for a signal but never finds it. I am using a Samsung Syncmaster 940Be, with a mv-1b.

LED1 on the NeoVGA is solid green, and LED2 is solid red. Can anyone verify for me what I should be seeing with the LEDs?

Anybody have any advice? I am in the process of checking all my solder joints now. There were a few(a lot) that I had to redo a couple(numerous) times. This is the finest solder work I have ever had to do, and my skills are average at best.

Thanks


There is also a NeoBiosMasta VMC and a Unibios 3.3 in the mix, and it is wired up for 480p vga.
 
Last edited:

buaku

Hardened Shock Trooper
Joined
Dec 3, 2007
Posts
437
from post 161 about a page back:
"One LED near the power regulators just shows that it's powered on, while the other one will show a 60Hz pulse (vsync), as that's a good indicator that it's alive and working properly."
When I tested mine I just had it hooked up to a regular PC monitor
 

tighecg

Armored Scrum Object
Joined
Nov 26, 2013
Posts
257
from post 161 about a page back:
"One LED near the power regulators just shows that it's powered on, while the other one will show a 60Hz pulse (vsync), as that's a good indicator that it's alive and working properly."
When I tested mine I just had it hooked up to a regular PC monitor

I looked at that post as well, I wasn't sure if the '60Hz pulse' meant that led2 should be flashing. Also when I see a red led on stuff like this, I just assume something is wrong. Thanks for the info
 

buaku

Hardened Shock Trooper
Joined
Dec 3, 2007
Posts
437
I looked at that post as well, I wasn't sure if the '60Hz pulse' meant that led2 should be flashing. Also when I see a red led on stuff like this, I just assume something is wrong. Thanks for the info

No problem! I thought the same thing when I was having trouble with my display. Usually red means bad!
I think my issue was bad connections to the clock line. At one point not all the red lines weren't soldered down, but it actually still worked. I'd say double check all connections and if you've soldered to a random part of the board, make sure it goes back to the correct spot on the chip.

Have you tried it without the VMC attached?
 

tighecg

Armored Scrum Object
Joined
Nov 26, 2013
Posts
257
Have you tried it without the VMC attached?

I have not, I thought I read in one of the threads that it would work fine with the regular NeoBiosMasta, so I assumed it would work with the VMC. I'll try taking that out after I finish checking these connections. I have only had time to get through about half of them, and everything looks good so far. I will try redoing the clock line also, that one felt a little iffy to me when I did it the first time.
 
Last edited:

buaku

Hardened Shock Trooper
Joined
Dec 3, 2007
Posts
437
I have not, I thought I read in one of the threads that it would work fine with the regular NeoBiosMasta, so I assumed it would work with the VMC. I'll try taking that out after I finish checking these connections. I have only had time to get through about half of them, and everything looks good so far. I will try redoing the clock line also, that one felt a little iffy to me when I did it the first time.

So with mine I used the upside down socket thing and sometimes it wasn't making contact with the chip. I thought I had messed something up, but I just re-seated it. It was a challenge to solder all that stuff up.
 

tighecg

Armored Scrum Object
Joined
Nov 26, 2013
Posts
257
I ended up resoldering the clock line, and I'm getting something on screen now, but it is not centered. I know I saw something about that in one of these threads, I have yet to find it yet tho. Everything works fine with the VMC. Thanks buaku.
 

buaku

Hardened Shock Trooper
Joined
Dec 3, 2007
Posts
437
I ended up resoldering the clock line, and I'm getting something on screen now, but it is not centered. I know I saw something about that in one of these threads, I have yet to find it yet tho. Everything works fine with the VMC. Thanks buaku.

Glad at least something is showing up now!! Is there maybe another monitor to try with? Or make sure the grounding line that wraps the clock wire is soldered well and not bridged to the clock.
Maybe there's interference on the clock line?
 

Flain

n00b
Joined
Aug 22, 2018
Posts
3
Are these still for sale? I really want to buy one :)

update: i got a response from Mike there are none available but he is thinking about a revision on the board in future
 
Last edited:

Jontox

Quiz Detective
Joined
Jul 19, 2016
Posts
89
update: i got a response from Mike there are none available but he is thinking about a revision on the board in future

If any revision will be considered, please avoid these soldering pads for wires.
I bought two of them and the second one had 3 soldering pads ripped off the pcb during soldering.
I am currently trying to fix this with 33 awg Wired’s through the testing holes.

Holes like the ones for outgoing signals from the board is the best for connecting wires 22 awg without any damage and durable solution

Just my 2 cents
 

fisk

n00b
Joined
Apr 22, 2008
Posts
20
This has probably been answered already, but I'm still having issues. I have a neoVGA that ive been wanting to install for a while now. However I am still confused the where to wire up the clock signal wire to the board. I am using an MV1C. Ive seen people scratch away a little bit of surface and solder directly to the board, but I don't feel safe doing that. I tried that on a test board and it fried a ram chip. Is there a better place to do this? Any assistance would be greatly appreciated. Visual assistance is also helpful. Thanks!
 
Top