nesdev.org

Connecting the "12V pin" is for autoswitching. Connecting it to GND or leaving it unconnected results in no autoswitching. Using 5V will restore the function but the TV will go to widescreen mode from it, you need 12V for 4:3 mode. I personally prefer not to connect the signal, usually th...

So I bought a cheap RGB cable for the SNES. It looked awful and was missing detail in bright scenes as in clipping because it's too bright. I modified it following this http://members.optusnet.com.au/eviltim/gamescart/snespal.png I followed that exactly but I used 100ohms instead of 75ohm and 220ohm...

I forgot to lift pin 9 but after doing all the soldering and all the hassle I had I think I'll just leave it at least for now anyway. Thanks for the help. I probably should have just done the switchless mod but whatever it works anyway. I'll be using RGB because it looks way better. My new 4K tv doe...

All input pins should be tied somewhere rather than left floating, it will remove chance of mysterious mode toggilng Happening later. You can explicitly tie it to GND or VCC, or just one of them with other handled by a pull-up or pull-down resistor, allowing to have one less wire go to the switch. ...

Ok so sorry for all the posts but I have everything ready now. I have resistors and a dpdt switch along with a second switch for the region mod. There's just 2 more things I need to know when somebody gets a chance. 1. Is it normal for the snes to still work while pin 4 is not connected and should I...

I figured out it's the right crystal but through av there's no red colour. I probably just need to use RGB but that's ok. I lifted the pin for the region mod also but it doesn't seem to do anything u less maybe it's only for certain games.

This actually seems to have 3 crystals in it. As I said the snes portion won't work in this FC twin anyway but I have no way to even measure these crystals. They're labelled RJH21 4772A and one says RJH24 576A

https://s14.postimg.org/7ejxzfrsh/20180128_094527.jpg

Are you using the RF modulator or the standard A/V port? If the latter, you should be able to plug in the red/white cables into an external sound system, or even headphones. Krzysiobal found that he was able to leave one side of both crystals permanently attached in a region-switchable famiclone. Y...

I'll have a look at the FC twin I have in the morning since the snes portion of that is broken anyway. It's a 60hz nes with bad colours basically. I'll see if it has the right crystal but either way I think I'm gonna need a switch with 6 connections so it can choose the xtal and framerate together. ...

Huh. Yeah, ok, based on the available evidence my best guess is that it needs a 6xNTSC crystal instead of a 4xPAL crystal. 4.43361875 MHz × 4 ÷ 4 ÷ 341 = 13002Hz 13002 Hz ÷ 262 = 49.625Hz ? You said you usually have a vertical lock, just not a horizontal one? This is exactly what I'm seeing https:/...

Do check the specific frequency. A random PC microphone and some software that can generate a spectrogram (like Audacity) would be sufficient. (If you had an oscilloscope that'd be even better, but most people don't) It seems to be picking up 13khz and 18khz when I switch it to 60hz along with the ...

Oh, man. Uh, there's no hsync lock there, Looks like it's not even drawing at the correct 15.7ish kHz hsync rate. The NTSC SNES starts with a 6×NTSC (i.e. 39.375MHz × 6 ÷ 11) crystal and derives everything from that; in contrast the PAL SNES ultimately operates at PAL×24÷5, from whatever provenance...

"jumps" implies something funny with vsync also. Can you see some kind of diagonal or checkerboard lines in the black-and-white video? I'm seeing the image3 or 4 times across and moving down slowly with black horizontal lines. Here's a picture of what it looks like. https://s14.postimg.or...

Do you know whether your TV can decode PAL60 video? Someone asked this question of an older 3-chip PAL SNES , but for them they started with an NTSC SNES and had problems switching to 50Hz modes (as a result, said SNES was always emitting NTSC color modulation regardless of vsync rate) Yeah it's a ...

Hi. I have a 1 chip PAL SNES and I lifted pin 111. I have a switch currently which connects 5v to pin 111 or gnd to 111. When I set it to 50hz it works but when I set it to 60hz it just jumps in black and white. Is it true I just need to use an RGB cable? Also I seen a video someone playing the PAL ...