You can buy the device here https://retromimi.com/products/opendingux-open-source-console?aff=5
Screen: 2.6 inch 4:3 240*320
CPU: JZ4760B mips
528mhz-up to 740Mhz
RAM: 128M DDR2
Internal memory: 16GB
Battery: BL-5C 1020 mAh
Big Thanks to Tony-jih, Steward-Fu ,Ping_Flood,sauce,jbanes,dinosaw_act,benob,jack83,hi-ban,,m1024 and all the other contributors for all the hard work.
LDK Retrogame this device is basically the same hardware as the latest RS97 systems it has the JZ4760B mips cpu inside. The same firmware can also be flashed on this device for RetroFWv1.2 use the kernel patcher. Or use the pre-patched or base firmwares below you can find support for this device on my website below and my discord channel.
LDK RetroFW firmware
Revision 2.1 JZ4760B Full FW with all ipk files https://drive.google.com/file/d/1JJHF1Lb4Ksu6YBCLXzeasp0ZZ8su1O5-/view?usp=sharing
Revision 2.1 JZ4760B base FW only prepatched https://rs97.bitgala.xyz/00.%20RS97-RS07%20Firmwares/RetroFW%20v1.2/RetroGame_v2.1_B/RetroFW.7z
1) write RetroFW.img to your internal SD card (the sd card is under the battery)
using win32diskimager or etcher
2) It shouldn't take long. Windows will pop up with those errors, just cancel out of those errors, and safely remove your card reader.
3) First boot of your LDK, you'll see the RETROFW image as the boot screen. It'll then check the file system, and expand your partition.
4) It will reboot when it's finished, and then you'll see GmenuNX with all it's stock settings ?
IPK Files here https://rs97.bitgala.xyz/00.%20Ipk%20releases/
If your LDK don't work with the above you have a different screen so you can try the patcher below.
Latest RetroFW v1.2 (use this to patch your hardware (LDK devices only) https://github.com/retrofw/firmware