HOW TO INSTALL:

unzip the .img file and flash it to your card with Rufus
insert card into console and boot
the console will reboot twice as it expands partitions
the console will reboot into dArkOS

Features:

KODI (credit to southoz)
working Fn button hotkeys
boot logo resolution fixed
new boot logo, low battery and loading screens
new background music, R36H-Synthwave-Retro-Compilation.mp3
teacupx's OC Kernel v1.40 (1296 Mhz default, 1512 Mhz max)
GPU overclocked to 600 Mhz
Jason3x's Realtek driver pack
Jason_3x's Emulation Station Icons (with my icon mod)
color battery icons
volume resume fix applied to prevent speaker pops
rotate boot logo service
rotate loading image service
full screen version of Dingux Files Viewer
change LED to red
Wi-Fi Manager
BT Manager
CPU Manager
Button Mapper (A/B switch is already enabled)
SYSTEMS Manager (to manage roms on 2 cards)
RetroArch One-Click Backup
Dave's Retro Shaders
Dave's Modern Shaders
R36H Pro Max Theme Patcher
patched themes:
- RetroOz
- Simple
- Switch
- Minimal
- Freeplay
- NES Box
- Replica
- XMB FCAMod

The boot logo fix for dArkOS on the R36H Pro Max was brought to my attention by u/SirSavings5678 [Reddit]. It works by patching the boot sector of the sd card with blocks from an image from Arkos4Clone and then replacing the existing dtbs and boot.ini, also from Arkos4Clone. Afterwards any properly formatted 1024x768 BMP images will display properly.

This image also restores use of the Fn button by using a compatible ogage file, special thanks to u/Wivi2013 for the modded dtb. (https://github.com/Wivi2013/R4x-Type-Console-CPU-Freq-Fix-and-R45H-FN-button-Fix/releases/tag/Fixes)

Overclocking kernel and voltage tables courtesy of u/teacupx. (https://github.com/teacupx/overclock-r36s.git)

Boot logos, loading and low battery screens: