Of course there are for almost everything (even for image settings) standards that have been established by any organizations or manufacturers.
However, these standards give it just because certain people have decided how it should look (for as many people as “good”) and so other manufacturers can follow.
Take, for example USB. USB was and is certainly not the only and best standard, but it is a standard to which other manufacturers can follow.
Because this standard is not perfect but it is always evolving every few years is the standard changed or extended.
And a standard such as low-resolution images are displayed on a much higher screen also does not exist, at least I know of no such standard.

And even if there were such a standard would be in this certainly not described the great parts of the image are missing.
I not known any system that the image calculated as 6:5 so that automatically missing several picture lines with picture content.
It would also be pretty stupid of the programmers that fight for every bit of computing power to calculate as many lines, you can not see at the end anyway …
So you cut too much from the image.
What is overscan, why and how this is defined and what this has to do with resolution, you can read on Wiki.

In order to respond to your example with your grandma and the lines in the image.
(I wanted to really no longer respond to your posts, but that’s pretty much the first post of you in which you will objectively remain in this discussion. In my review I’ve imitated the way you express yourself, … and as you can see You do not like it ;-))
So I understand Your statement that a picture in which some stroke are very clear to see, but spoil the image in any case, is better for all people, as the same picture, in which these lines but can not be seen ..?

Of course the picture in which you can’t see these Lines looks better.
Especially for your grandmother. And for your grandmother, it is the personal impression why the picture looks better because she can see the picture but can not see the disturbing lines.
It’s a personal impression.

I’m struggling too

Pi Model: 2 B
RetroPie Version Used: 3.0.0 Beta 2
Built From: SD Image
USB Devices connected: Keyboard

Guide used: https://www.petrockblock.com/2014/12/29/controlblock-power-switch-and-io-for-the-raspberry-pi/#Using_SNES_Controllers_with_the_ControlBlock

built the controlblock last night. Plugged it all in. emulationstation saying there are 2 controllers connected but the snes controllers are not responding at all.

Tried to follow the steps provided for dotarj

Here is a pic of my setup

i2c was next

went into the ControlBlockService folder

sudo make uninstallservice

pi@retropie ~/ControlBlockService $ sudo i2cdetect -y 0
Error: Could not open file <code>/dev/i2c-0' or</code>/dev/i2c/0': No such file or directory
pi@retropie ~/ControlBlockService $ sudo i2cdetect -y 1
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          03 -- -- -- -- -- -- -- -- -- -- -- -- 
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
70: -- -- -- -- -- -- -- --  

I tried a fresh image still having exactly the same issue.

Do i need to swap GND and VCC?

I use a Mac and an old HTC smartphone to read and write to a Micro SD card. Is the SD card definitely showing as a valid drive within Windows Explorer?

Most Android devices have an option to mount the SD card when connected through USB. Check the notification section when you connect initially as this is normally disabled by default. You should be shown an option to move from “Charge Only” to “Disk Use” or something along those lines.

From here, the SD card should show as a new drive (often with the name “NONAME”) and you should be free to use Win 32 Disk Imager. I use the dd command over Terminal to write images.

I think it may have been an issue with this file:
Retrolink_USB_SEGA_Saturn_Classic_Controller.cfg

If just that one is deleted it may have worked as well.

Have you deleted all the .cfg files then recreated it as detailed in the link? That has worked for at least 3 others on the forum.

I think there is a conflict somewhere between one or more of the auto config files (that deal with the usbgamepad you have). I could be wrong, but removing them and recreating the one you want seems to work.

This may help:

USB SNES Controller – D-Pad not working in games

I’m having a similar issue with the Retrolink SNES to USB adapter.

Jstest detects the joystick and shows the input correctly, but then Emulationstation doesn’t detect any gamepad on startup.

I don’t have any issues with another Dualshock to USB adapter or Xbox 360 controllers.

I’m using Retropie 3.0 beta, installed from the image.

2 Things:

1. How are the Arcade Cabinet Controls setup, whether USB or GPIO?

2. That seems a bit weird to me that a controller would be plugged into a cabinet, but it sounds cool.

But it seems to me that you are using the RetroGame library from Adafruit, which can handle input from the GPIO pins via keyboard presses.

If that is the case, make 100% sure that the setup for Player One in MAME is Keyboard Only(AKA configure it so that there is not mention of Joystick 0).

I, too, felt that the buttons were not correctly mapped for Retroarch (libretro) emulators so here is my fix.

I assume from your references to square and triangle that you are using a PlayStation controller but you don’t say whether it’s connected by USB or Bluetooth. For a wired (USB) PS3 controller, this is what I did. Run the command

sudo nano "/opt/retropie/emulators/retroarch/configs/Sony_PLAYSTATION(R)3_Controller.cfg"

Here, you can reassign input_b_btn, input_y_btn, input_a_btn and input_x_btn to your own preferences.

If you are connecting via bluetooth, then you should be able to find the BT config file in the /opt/retropie/emulators/retroarch/configs folder.

i am using a 512 Gb usb and it cant get the roms out of the rom’s directory so is 128 Gb the max?

I just got a Mausberry and the setup script was borked. Not sure why, but it is attempting to use directories in the script that simply don’t exist in my Retropie distro… I tried it with Raspbian installed from NOOBS and it works fine.

I had the same issue at first. The workaround for me was to hook up a usb keybord and configure it in emulationstation. After this I reconfigured my cabled ps3 controller.

Disconnected the keybord and rebooted emulationstation and voila, no more reconfiguration needed! Maybe it works for you!

Nice build, how did you made the usb on the front, do you have pictures of that?

i have a 128gb kingston drive, never had an issue with it

like this..

http://www.ebay.co.uk/itm/Kingston-Small-16GB-32GB-64GB-128GB-Mini-3-0-USB-Flash-Memory-Pen-Drive-DTM30-/371190512862?pt=LH_DefaultDomain_3&var=&hash=item566cadbcde

I created a random game section in my system which works pretty well I think, but I changed so many things in the Retropie/ES installation that I can’t really share it because it’s part of a bigger system of rom launcher which allows me a lot of things, but uses custom bash scripts (connected from each other), new type of config files, also some files have to be modified in ES and the whole thing is in work in progress.
But if I have time, I’ll do a short video to show how it works, it can maybe give some ideas… I can run a random game through the whole library or only on a specific section. I don’t have an auto demo mode though, but it’s probably doable with some work and using a USB monitoring to check if there is any activity on the buttons or controls.