I've got it figured out. I mapped the buttons as if I had an SNES controller (backwards). This corrected the problem with SEGA. The only issue now is that in EmulationStation, it says to press A to enter, B to go back, etc. For somebody not familiar with the system, that can be confusing. By going through the RetroArch-Setup scripts and swapping the A/B buttons, it only does it in EmulationStation. So everything now works like it's supposed to.

Thanks! On to my next big project!

Please read and provide more information as agreed when registering on the forum - https://retropie.org.uk/forum/topic/3/read-this-first

This is very odd,Had to re flash the image and everything is working again,It like it couldn't load the bios file to the Sega Mega CD weird..:D so this has not happened to anyone else then,This will teach me to copy my SD card to a image,just got to copy the videos and other images over and it done,but I will make a image of it once it done so if it happens again they will not be a problem,I think it was a space issue..So remember don't let the SD card run out of space.

@auswear https://github.com/retropie/retropie-setup/wiki/EmulationStation#how-do-i-change-the-order-of-the-systems-in-emulationstation

Thanks for your reply. I want to update the topic; I couldn't follow the link because I couldn't get F4 work as told in the guide (I think because of my keyboard). But I tried another joypad which is identical and that worked just well, really weird.

And I wanna ask another question;
Since raspberry is getting warm I have ordered heat sink with a fan (link is below) but it says running current is 0.2a and I guess that I cannot feed it from directly raspberry pi 3 (for which I have 2.5a adapter), or can I?

http://www.dx.com/nl/p/copper-aluminium-heatsink-fan-cooling-kit-for-raspberry-pi-black-443690#.WBspOPrhBIA

For anyone interested, I was able to figure this out,

I was using crt-pi shader, but for whatever reason this causes problems with genesis plus gx. Using crt-pi-vertical shader produces the identical results that I get in other emus using crt-pi shader.

I still have a question related to this topic.

My workaround works, but it requires a reboot of my RPi which is not very convenient - does anybody know a way of disabling a CPU core online? On non-ARM CPUs it is possible by echo'ing "0" to /sys/devices/system/cpu/cpuX/online, but here it won't work.

Thanks.

@herb_fargus

I did not know that. To bad about the input would love some bezel and shader support.

Hi @area877 ,

If you are playing the old Kings Quest IV dos game (the one with the type in prompt at the bottom of the screen that looks like ">"), type save. It will ask you the location, just press enter and then it will ask you to select a directory to store your saves. When you restart, start a game and then type load and the same screen will appear.

Si

@II12yanII

If you happen to be on a Mac and have mounted the roms folder, the Finder may have put a bunch of invisible garbage files inside a few folders. If this is the case, you can view and delete them by using an alternative remote file browser such as 'Cyberduck'.

Just for completeness, this is the default one from a fresh RetroPie v4.0.2 image

dwc_otg.lpm_enable=0 console=serial0,115200 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait quiet loglevel=3 consoleblank=0 quiet init=/usr/lib/raspi-config/init_resize.sh

Don't know how make it look like a code line

It would be easier to update your romset.

@davej Cool! Thanks for the visual. I figured that your shader was more advanced.

No problem. Please make sure to mark the thread as solved when you have a moment.

Have fun!

That for sure!

Problem solved using No-intro roms :)
Thank you all for your comments.

@Shadowfax sorry its 5 in the morning here so im not going to get on my pi for exact details but to fix sound buffer go into sound settings and there is a section at the bottom where there are 3 options that are there with the bottom one checked. I think it says something about "exact" but i could be wrong. Change it to the first option. Then save your settings. Runs awesome for me now with scanlines on.