ning

1, serial port: open the box, on the backside, there are 3 hole, which is serail port, from right to left, they are TX, GND, RX, serial config is 150000n8. first log: we know the memory is 8GB Lp4x. Ddr version is V1.14. freq=324Mhz? which is from rkbin repo. next step try to use ctrl+c to stop auto boot.

Hw Spec Soc: Amlogic S912-H, (S192 with dolby, DTS) Mem: 2G Ddr3 Emmc: 16G 4K HDMi AV out ethernet ?? Wifi/Bt ?? USB port *1 5V DC-IN IR receiver Reset hole OS: Ali YunOS Steps 1, connect UART from mainboard test points, (I can only find M17's UART port) 2, build u-boot follow q200.rst in u-boot doc, use VIM2 config and use VIM2 fip blobs (hope that works) 3, build Arm64 debian bookworm with default debian kernel to USB driver, and config system. 4, falsh u-boot to USB driver 5, connect to device with UART, hope to stop at u-boot cmdline, and erase emmc. if failed, find other way to erase, maybe Amlogic flash tool. 6, instert USB driver, and reboot device potaintial issues: can't find UART port on mainboard VIM2 mainline Uboot can't boot M16S device does not support boot from USB. No schematics for next step dev.

recent days I find Chromebook may be better Arm devices with laptop form factor. compare with Pinebook pro, Chromebooks are cheaper, and mass product, and better tested. why no much people discuss how to install 3rd OS to its internal emmc, or reflash its uboot? I have searched on ArchArm forum, only 1 topic. but there actually a way to reflash uboot, and mainline uboot already has support for arm based chromebooks. It should be easy, but why no discussion?