The emulation is pretty good, much better than previous ATGames attempts. They do use their own proprietary emulation, but so far it's been able to run everything that I throw at it. I have seen occasional hiccups on some of the more intense graphics games and Virtua Racing won't run (Obviously they aren't emulating its custom 3D chip.) Also, the sound is much better that it is with older ATGames emulation. I would not put it on par with the NES Classic or SNES Classic, and the menu navigation sucks, but its definitely able to play most Genesis and Sega Master System games. It also plays Game Gear, but I haven't added any of my Game Gear games to my current build.
Emulation is quite good, sound is not unfortunately. Some boards come with a 2gb 29F chip (29F16) some with 4gb 29F chip (29F32).
I extracted the full firmware partitions and installed some apk in my samsung androud device: some installs (with no special permissions needed) some not; the ones installed have no icon and cannot be run.
To extract the full firmware splitted in all the 15 "partitions" you need an (i suppose) official and free rockchip tool, just need to install adb drivers previously and then connect the usb mini cable, start the tool and switch to "usb mode" instead of default mtp (no need to install mtp drivers, just install the adb ones).
My device is dated September 2017 and i cannot find this file /sdcard/Android/obb/com.atgames.menu.hal/com.atgames.menu.hal.obb nor the /Android/obb folder so I am sure this is a newer system OS revision.
ROMs are stored at /system/atgames/Genesis and all-game.ini is inside /system/atgames/
/system is ro so you need to make it rw, copy files and re-ro it. It works, just tested.
Yeah. The only problem seems to be that windows below 8 (ex. Windows 7) does not have MTP USB drivers (mandatory to see the device SDCARD partition as a FAT32 flashdrive); but if you installed Android drivers (ex. Portable Devices) you can use them: here it is a quick guide.
I managed to get screenshots:
I hope to get USB support as soon as the adapter i ordered will arrive.
If there is some andorid-guru listening i can provide the decompiled apk; what is really needed now is a way to enable wireless pad buttons to control launched applications, they (pad keys) seems to work only with the default "launcher/menu".
Now keys are partially working; still need to configure the 3 menu-start-rewind keys and make retroarch to start instead of default (ugly) launcher.
Just Mega Drive Flashback HD version, i do not have the SD one.
I just managed to permanently install retroarch and resize system partition, if i manage to obtain something useful i will make and release a custom rom (it is an Android device). Dunno if i will be able to get it working; progress will be posted here.
The package with the 1st Custom ROM/Firmware for Mega Drive Flashback is ready !
It contains 3 folders:
1 - the 1st one provide a way to fully backup your console NAND to have a working recovery solution if something goes wrong.
2 - the 2nd one is a pre-cooked firmware with RetroArch integrated; it can be flashed as-is if your console NAND configuration is the same as the one provided
(read the included .txt for more information)
3 - the 3rd one is a folder where you can play with ADB and the console; you can find some batch scripts and some shell script to see how the console works.
The console is based on Android 4.4.4; my unit has 4GB NAND but I saw some other units with 2GB only so be careful when flashing (read the included .txt files) !
The console is probably compatible with external USB flash drives but I need to test it (I miss the correct USB mini to USB female adapter).
It took me almost 2 weeks to achieve that result and it is nothing more than some "script-kiddie" stuff, feel free to modify and use it as you prefere.
The readme files are best readable with Metapad (wrap test option ON).
I will probably not have the time to answer questions but I wrote quite exaustive readmes inside the package to explain each step better. if you have doubts write them here but do not get angry if I will not answer