shmups.system11.org

Shmups Forum
 
* FAQ    * Search
 * Register  * Login 
It is currently Wed Dec 12, 2018 12:31 pm View unanswered posts
View active topics



Post new topic Reply to topic  [ 4756 posts ]  Go to page Previous  1 ... 155, 156, 157, 158, 159
Author Message
 Post subject: Re: NESRGB board available now
PostPosted: Thu Oct 11, 2018 6:06 pm 



Joined: 19 Jul 2017
Posts: 854
Danexmurder wrote:
I salvaged a SNES multi-out from a bad SNES motherboard. I'm having trouble figuring out how to wire audio for it though. Since the NES is mono should I just run the audio from the audio out to both the left and right audio on the multi-out? I also decided I wanted to do a 4 position rotary switch for palette selection and toggling composite video out. Has anyone on here done something like that successfully? Thanks!

My understanding is that most TVs will assume having just the left channel connected means mono audio, so just run it to the left channel. Alternatively, you can track down an audio amp/splitter board to duplicate the audio to the right channel.


Top
 Offline Profile  
 
 Post subject: Re: NESRGB board available now
PostPosted: Fri Oct 12, 2018 1:54 pm 


User avatar

Joined: 16 May 2008
Posts: 1601
Location: Denmark
Yes, just connect the audio to both the L and R pin of the SNES socket.


Top
 Offline Profile  
 
 Post subject: Re: NESRGB board available now
PostPosted: Sun Oct 14, 2018 2:34 pm 


User avatar

Joined: 21 May 2018
Posts: 5
Location: Sweden
What cable do I need to connect my NESRGB modded PAL NES to my TV?

I have a PAL NES (front loader) which was modded with etim's NESRGB kit a while ago, and they also added a SNES Multi out port to the NES. I was told to buy a SNES NTSC Csync cable in order to connect it to my TV (which has scart btw). Is that correct?

Would this be the correct choice: https://www.retrogamingcables.co.uk/pac ... gold-scart ? (and should I choose "csync 470Ω" or "csync pass-trhough"?)


Top
 Offline Profile  
 
 Post subject: Re: NESRGB board available now
PostPosted: Sun Oct 14, 2018 3:18 pm 


User avatar

Joined: 01 Sep 2018
Posts: 29
IPD wrote:
What cable do I need to connect my NESRGB modded PAL NES to my TV?

I have a PAL NES (front loader) which was modded with etim's NESRGB kit a while ago, and they also added a SNES Multi out port to the NES. I was told to buy a SNES NTSC Csync cable in order to connect it to my TV (which has scart btw). Is that correct?

Would this be the correct choice: https://www.retrogamingcables.co.uk/pac ... gold-scart ? (and should I choose "csync 470Ω" or "csync pass-trhough"?)


Well if you have any pics of the inside of the NES that'd really help. If you don't have pics, and don't want to unscrew it, then it depends. Is that cable reccomendation from the modder? If so then yes an NTSC csync cable would be best. As to wether it should be 470ohm or passthrough, if J8 was left un-jumpered you would get about 0.7Vpp with passthrough or about 0.37Vpp with the 470ohm cable. Both within the 0.3 to 0.9Vpp safe range for 75ohm tv's.

However, if J8 was jumpered, it would lower the voltage. So with both the passthrough cable and 470ohm cable you'd get less voltage. Seeing as if you lower that 0.37Vpp it may go too low with both J8 shorted and the 470ohm resistor to lower it. It may be best to avoid the 470ohm cable, and just use the passthrough.


Top
 Offline Profile  
 
 Post subject: Re: NESRGB board available now
PostPosted: Sun Oct 14, 2018 4:15 pm 


User avatar

Joined: 09 Aug 2017
Posts: 1036
Location: Australia
FBX wrote:

The thing about Tim's version 1.4 board with the J8 jumper is he has a 470 Ohm resistor in series already on the line. So at load, it's like 700mv even with J8 open. That's in the upper range for SCART, but still well within tolerance. But if you use an RGB cable with another say 470 Ohm resistor (and still leave J8 open), that will bring it down to like 350mV or so, which is perfectly fine too. If you're using a straight cable, just close J8 and you'll be fine. Leaving it open isn't going to send actual TTL voltage to your equipment, even though Tim labels it as such.


FBX summed up the lack of danger in using the TTL signal from NESRGB last page.
An NTSC SNES cable has caps in it. You dont want caps.
A Pal one has termination resistors. You dont want that either.

Get a cable with 0 components.


Top
 Offline Profile  
 
 Post subject: Re: NESRGB board available now
PostPosted: Sun Oct 14, 2018 6:12 pm 


User avatar

Joined: 21 May 2018
Posts: 5
Location: Sweden
Digital Dragon wrote:
Well if you have any pics of the inside of the NES that'd really help.

So I think it's probably best to just unscrew it. I'll do that and take a few pics. :)


Top
 Offline Profile  
 
 Post subject: Re: NESRGB board available now
PostPosted: Mon Oct 15, 2018 2:56 pm 


User avatar

Joined: 26 Feb 2018
Posts: 30
Location: Frederick, MD
I'm working on wiring up my NESRGB to a salvaged SNES multi out. I'm looking on advice for the best way to actually connect to the pins. It's a pain in the ass trying to solder to them directly. I keep burning plastic. Are there any sort of pin connectors that you guys usually use for something like that? Has anyone done like a through-hole jumper board?


Top
 Offline Profile  
 
 Post subject: Re: NESRGB board available now
PostPosted: Tue Oct 16, 2018 9:50 am 


User avatar

Joined: 12 Jul 2007
Posts: 5477
Location: Where the fish lives, WV
I am amazed at how many pages this product has, after being out so long.

It is a great product though.
_________________
My Collection: http://www.rfgeneration.com/cgi-bin/col ... Collection


Top
 Offline Profile  
 
 Post subject: Re: NESRGB board available now
PostPosted: Mon Oct 29, 2018 9:02 pm 


User avatar

Joined: 21 May 2018
Posts: 5
Location: Sweden
Digital Dragon wrote:
Well if you have any pics of the inside of the NES that'd really help. If you don't have pics, and don't want to unscrew it, then it depends. Is that cable reccomendation from the modder? If so then yes an NTSC csync cable would be best. As to wether it should be 470ohm or passthrough, if J8 was left un-jumpered you would get about 0.7Vpp with passthrough or about 0.37Vpp with the 470ohm cable. Both within the 0.3 to 0.9Vpp safe range for 75ohm tv's.

However, if J8 was jumpered, it would lower the voltage. So with both the passthrough cable and 470ohm cable you'd get less voltage. Seeing as if you lower that 0.37Vpp it may go too low with both J8 shorted and the 470ohm resistor to lower it. It may be best to avoid the 470ohm cable, and just use the passthrough.


Syntax wrote:
FBX summed up the lack of danger in using the TTL signal from NESRGB last page.
An NTSC SNES cable has caps in it. You dont want caps.
A Pal one has termination resistors. You dont want that either.

Get a cable with 0 components.


So I've checked now. J8 was left unsoldered by the modder. So I should choose the SNES CSYNC Pass-through (TTL) cable, right?


Top
 Offline Profile  
 
 Post subject: Re: NESRGB board available now
PostPosted: Tue Oct 30, 2018 3:19 pm 



Joined: 18 Jun 2015
Posts: 26
I had my NES RGB modded with Borti's IGR I/O board but it displays no image at all through my Gscartsw lite. Direct into my PVM through SCART to BNC though works great, so I'm a bit confused. What could possibly be causing this? They should be compatible from what I understand...


Top
 Offline Profile  
 
 Post subject: Re: NESRGB board available now
PostPosted: Wed Oct 31, 2018 4:55 pm 


User avatar

Joined: 18 Feb 2015
Posts: 2147
Location: DFW area, Texas
IPD wrote:
Digital Dragon wrote:

So I've checked now. J8 was left unsoldered by the modder. So I should choose the SNES CSYNC Pass-through (TTL) cable, right?


If you want 700mV peak-to-peak under load, which is the highest default of the NESRGB 1.4 output, yes. If that's too low voltage under load for your TTL input, you might want to consider removing or changing the 470 Ohm resistor that's on the csync trace in the NESRGB board.
_________________
Web Site: http://www.firebrandx.com

Twitter: https://twitter.com/FBXGargoyle?lang=en


Top
 Offline Profile  
 
 Post subject: Re: NESRGB board available now
PostPosted: Thu Nov 01, 2018 6:07 am 


User avatar

Joined: 12 Jul 2007
Posts: 5477
Location: Where the fish lives, WV
Anyone have any idea of how many of these sold?

It's a great device.
_________________
My Collection: http://www.rfgeneration.com/cgi-bin/col ... Collection


Top
 Offline Profile  
 
 Post subject: Re: NESRGB board available now
PostPosted: Mon Dec 03, 2018 7:34 pm 


User avatar

Joined: 26 Feb 2018
Posts: 30
Location: Frederick, MD
It's alive! I finally got my NES RGB mod/full recap up and running. This was a big undertaking as my only previous mod was a 1chip-01 RGB bypass. I learned a LOT doing this. I had to do a lot of internet digging to get all the info I needed to do this mod. Partly because I'm a noob to all of this and partly because documentation out there isn't super great. It's definitely fine for people with a moderate understanding of electronics and soldering but it's tough on someone new to this stuff. That said it's totally possible and I had fun making mistakes and learning.

First big mistake was destroying my first NES motherboard while trying to get the ground pins on the PPU desoldered. I had my vacuum set to 450c and let it sit for a while but it still didn't get all the solder on the first pass. I didn't have desolder wick and just kept trying to vacuum it out. I eventually destroyed the through holes. Lesson learned.

Everything else went pretty smooth right up until I had to attach the palette wires. I've just been using a cheapy $15 doller soldering iron and apparently the temp regulation wasn't great. As a result I managed to lift the pad on each palette contact. Luckily I was able to salvage this area by using the through holes, and scratching the trace on Pad 1 and globbing solder all over that whole area to make a contact. It's not pretty but it's functional.

I manged to wire up the rotary switch and I think it's a great solution! It took me a minute to figure out how to wire it but it totally makes sense now. I didn't realize that "ground" was basically whatever the palette is. So after making that mental leap wiring up the switch was incredibly easy. I just needed a 1-pole 4 through switch.

I got it all together and fired it up and it works! I have noticed a bit of signal interference and I'll probably be on here asking for help on sorting that out. It was very noticeable in SMB but in a game like Mega Man 2 it wasn't as prevalent. In the photos of all the monitors you'll notice a darker band on the screen. It would sort of scroll from the top of the screen to the bottom.

I set it up to use TTL sync and I've heard that can cause interference issues. Can anyone chime in on that?

Image
Image
Image

Next up is installing the J-tag adapter and updating the firmware/palettes!


Top
 Offline Profile  
 
 Post subject: Re: NESRGB board available now
PostPosted: Tue Dec 04, 2018 6:27 pm 



Joined: 10 Jun 2018
Posts: 10
I have installed NESRGB on french NES and used it's own AV-out port. However I get checkerboards on some solid colors and I suppose using CSYNC can fix that?

My question is would it be possible to just install 8pin din-connector and desolder J8 + using CS#? or can I use CSYNC with french NES' own AV port?


Top
 Offline Profile  
 
 Post subject: Re: NESRGB board available now
PostPosted: Wed Dec 05, 2018 7:50 pm 


User avatar

Joined: 01 Sep 2018
Posts: 29
tn61 wrote:
I have installed NESRGB on french NES and used it's own AV-out port. However I get checkerboards on some solid colors and I suppose using CSYNC can fix that?

My question is would it be possible to just install 8pin din-connector and desolder J8 + using CS#? or can I use CSYNC with french NES' own AV port?


I wouldn't bother with J8 honestly, The csync voltage is only 0.7vp-p with it open so its fine. As to the multi out, I'm sure there must be a way to disconnect composite and wire csync to the multi out, but I'm not sure how. How did you disconnect the original 'RGB' lines?


Top
 Offline Profile  
 
 Post subject: Re: NESRGB board available now
PostPosted: Tue Dec 11, 2018 5:40 am 



Joined: 26 Nov 2018
Posts: 6
Does anyone sell the 8pin cables with Audio separate? I cannot find them anywhere (except the kits..I want a premade one)

I had someone install a NESRGB board on my NES awhile back and he did it with an 8pin and the audio is on a 3.5mm port on the back of the NES separately. I still have a cable but it's getting flimsy and I was trying to find a spare.


Top
 Offline Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 4756 posts ]  Go to page Previous  1 ... 155, 156, 157, 158, 159

All times are UTC


Who is online

Users browsing this forum: Galdelico, HellRazor, juji82, shadowman and 10 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:
Jump to:  
Space Pilot 3K template by Jakob Persson
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group