Board sticker: M8S PRO R4 S912 3G 32G DDR4 DQ

It doesn't have button soldered, it works like power button in android

Serial port is marked on bottom of board (tx/rx are from cpu perspective)

probably: https://www.geekbuying.com/item/MECOOL-M8S-PRO-S912-KODI-17-0-4K-HDR10-3GB-DDR4-32GB-eMMC-TV-Box-380737.html

Android info

Android 7.1 bootlog from serial: m8s-android-bootlog.txt.gz

U-Boot 2015.01-g9331ff1-dirty (Mar 15 2018 - 16:16:24)

DRAM:  3 GiB
...
        aml_dt soc: gxm platform: q20xrmii variant: 3g
        dtb 0 soc: gxm   plat: q20xrmii   vari: 2g
        dtb 1 soc: gxm   plat: q20xrmii   vari: 3g
      Find match dtb: 1
...
parts: 10
00:      logo	0000000002000000 1
01:  recovery	0000000002000000 1
02:       rsv	0000000000800000 1
03:       tee	0000000000800000 1
04:     crypt	0000000002000000 1
05:      misc	0000000002000000 1
06:      boot	0000000002000000 1
07:    system	0000000080000000 1
08:     cache	0000000020000000 2
09:      data	ffffffffffffffff 4

M8SPRO:/ # uname -a
Linux localhost 3.14.29 #46 SMP PREEMPT Thu Apr 12 19:43:12 CST 2018 armv8l

M8SPRO:/ # cat /proc/cpuinfo
Processor	: AArch64 Processor rev 4 (aarch64)
processor	: 0
processor	: 1
processor	: 2
processor	: 3
processor	: 4
processor	: 5
processor	: 6
processor	: 7
Features	: fp asimd evtstrm aes pmull sha1 sha2 crc32 wp half thumb fastmult vfp edsp neon vfpv3 tlsi vfpv4 idiva idivt 
CPU implementer	: 0x41
CPU architecture: 8
CPU variant	: 0x0
CPU part	: 0xd03
CPU revision	: 4

Hardware	: Amlogic
Serial		: 220a82006da41365fedf301742726826

M8SPRO:/ # free
		total        used        free      shared     buffers
Mem:       2876604416  2210639872   665964544           0    31326208
-/+ buffers/cache:     2179313664   697290752
Swap:       524283904           0   524283904

M8SPRO:/ # df
ilesystem        1K-blocks    Used Available Use% Mounted on
mpfs               1404592     504   1404088   1% /dev
tmpfs               1404592       0   1404592   0% /mnt
/dev/block/system   2031440  973788   1057652  48% /system
/dev/block/data    26969964 3050864  23919100  12% /data
/dev/block/cache     507848    2860    504988   1% /cache
/dev/block/tee         5115      45      5070   1% /tee
/dev/fuse          26969964 3050864  23919100  12% /mnt/runtime/default/emulated
/dev/fuse          26969964 3050864  23919100  12% /mnt/runtime/read/emulated
/dev/fuse          26969964 3050864  23919100  12% /mnt/runtime/write/emulated

recovery sd

https://www.cnx-software.com/2016/11/19/how-to-create-a-bootable-recovery-sd-card-for-amlogic-tv-boxes/

amlogic info

http://www.linux-meson.com/doku.php

armbian

https://forum.armbian.com/topic/12162-single-armbian-image-for-rk-aml-aw-aarch64-armv8/

https://github.com/150balbes/Amlogic_s905-kernel

dpavlin@nuc:~/Downloads$ xzcat Armbian_20.09_Arm-64_bullseye_current_5.8.5.img.xz | dd iflag=fullblock oflag=direct conv=fsync status=progress bs=1M of=/dev/sdb
dpavlin@nuc:~/Downloads$ sudo mount /dev/sdb1 /mnt/sdb1/
dpavlin@nuc:~/Downloads$ cd /mnt/sdb1/

root@nuc:/mnt/sdb1# cp u-boot-s905x-s912 u-boot.ext

root@nuc:/mnt/sdb1# vi extlinux/extlinux.conf

root@nuc:/mnt/sdb1# grep -v '^#' extlinux/extlinux.conf
LABEL Armbian
LINUX /zImage
INITRD /uInitrd

FDT /dtb/amlogic/meson-gxm-q200.dtb
APPEND root=LABEL=ROOTFS rootflags=data=writeback rw console=ttyAML0,115200n8 console=tty0 no_console_suspend consoleblank=0 fsck.fix=yes fsck.repair=yes net.ifnames=0

u-boot

https://github.com/endlessm/u-boot-meson