Right, I decide to order this device a few days ago from amazon.. https://www.amazon.co.uk/gp/product/B072ZP9HMY/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1
According to the screenshots, it seemed to be the Pap Kiii Plus. When it arrived, here are the pictures of the box and manual..
Could it be a Pap III plus? Lets see..
According to a few other forums which I had visited, it seems to match the firmware that's on some of the PAPKIII Plus devices so all seems well. However, I decided to open up the device and below are the findings.
Battery is removable and the high capacity variant so all is well here..
CPU is the Jz4760 which is used on both the Pap KIII Plus and Pap KIIIS.. We know that the above is definitely not a standard Pap KIII
And what do we have here? Motherboard markings showing PAP_K3S_V3_DDR_V2.0....
So it seems as if it is really a PAPK3S but using some modified firmware that's usually available for the PAP KIIIPlus (Super Game Firmware LN430)
Now time for some of my other findings.
On some PAPKIII devices, you can update the firmware by placing specific files on the root of the SD, then going into system settings and updating. This model does not allow this.
However, it is possible to boot the Device into Bootloader/Flash mode by the following..
Turn off device. Remove its connection from PC (USB).
Hold Down Start Key and Hold down the power button for a few seconds.
Windows should detect and install the drivers. (On my windows 10 machine, it seems to have automatically loaded the JZ4760 Boot driver, but on second attempt I had to disable device signing on windows and point it to the JZ4755 boot driver (Found with the Ingenix Flash tools). I attempted to flash the RZX 50 firmware to it (I knew it wont work, just wanted to see if it would flash, but to no avail)
Ofcourse I made a backup of the MicroSD card in the device. It seems pretty much like a raspberry PI in that the whole firmware is on the MicroSD. (As long as you have made a backup with win32diskimager or similar, the device should be able to recover from a brick by writing this backup back to the microsd)
Ofcourse new firmware can also be written by obtaining or creating images that can be written to microsd too.
In order to view file contents on Windows 10 (Roms etc) many people have had some issues. The solution that works 100% is to do the following
Turn device off and unplug from usb.
Plug it back to usb
Then turn on the handheld. After a few seconds, it will detect and allow you to view the contents of the Fat32 Partition.
I have also experimented in running opendingux applications (With the .dge extension) Some run well no issue (E.g Atari Lynx Emulator and Vice (C64 Emulator)
There are a few that run in a smaller screen size which also then brings me to the point of the screen resolution of this device.. If it is a Pap KIIIS, It would have 800x480 resolution or similar.. For the 320x240 dingoo apps which do not scale, it filles 2/3rds of the screen horizontally (320 pixels on a 480 pixel viewport?) which may indicate that the resolution of my device is actually 480x272 (Which then would indicate its not a PAP KIIIS?)
For the Price, Cant really complain. Gameboy advance games seem to run pretty well on it actually. I have found issues with audio grating (Maybe audio buffer size too small?). Unfortunately even in pixel perfect mode (1:1) it does not seem to give silky smooth scrolling (Regardless if its via TV-Out or built in screen). I Know some handhelds have unusual screen hz rates (57hz etc).
.APP files do not seem to run on this firmware. (Would have been nice to try out 7 days and some 3d games on it, but nothing at the moment..)