kjhota123

Well, I don't even own a RPi, but here are some suggestions:
You mention several OS'es, but not Armbian. Have you tried Armbian? If not, that would be the first thing to do, specially since you asked here :) In your video, you show RISC OS, and apparently it is running a armv7 version. Could it be that 32-bit ARM OS's are working, but 64-bit are not? If this is the issue, then maybe you can try to build 32-bit Armbian image and see if it works. It could also be a device tree issue. Maybe you can extract the DTB from some of the OS's that are working, and try to use it with an Armbian image.

Hello guys!
Probably some of you know me as the MadEDoctor from Youtube.
For those of you who don't know my channel and don't know what I am doing at the moment - Long story short I got my hands on a 16GB RAM chip that should be compatible with the Raspberry Pi 4 hardware.
But there is a problem I am facing... That is I am unable to boot any OS different from VMware (arm version) and RISC OS (that is pretty much useless).
When I try to boot Raspbian for example - It shows the rainbow square and then gets stuck on a completely black screen and it draws around 500mA...
I contacted Jeff Geerling with the hope he could help with this project. He wrote a post on the official RPi forum. As it seems the engineers of the Pi just don't want to help and even worse are lying that the hardware doesn't support 16GB of RAM...
Then one guy in the comments suggested I write here and ask for help... and here I am
I will be pretty thankful if somebody could help me with this project.

Here I provide datasheets for both the 16GB chip I got and the 8GB OEM one so you can compare them.
8GB - Micron D9ZCL | MT53E2G32D4NQ-046 WT:A :https://www.farnell.com/datasheets/3681594.pdf
16GB - Micron D8CBG | MT53E4G32D8CY-046 WT:C :https://4donline.ihs.com/images/VipMasterIC/IC/MICT/MICT-S-A0017462930/MICT-S-A0017465122-1.pdf?hkey=52A5661711E402568146F3353EA87419

And this is the video where I show what I have done to this point: https://youtu.be/vtym0TAWNto
 

Aside from all the unheard user wishes we decided to create a new dedicated room for specific tasks with defined clear goals.
Topic creation is limited to collaborators.

Amlogic has quite good performance/price ratio: their low-end S905X3/X4 are very good chips for the price, and quite updated too (Cortex A55). Rockchip and Allwinner have nothing comparable yet for the price. Allwinner is far behind. Rockchip recently introduced the long-awaited RK356x series which at least is on par with raw performance to S905X3 and has a nice set of features, but the price is clearly higher and support is still going on. RK3328 is not as good as S905X3, either from CPU and GPU sides, but the RK3399 is still quite good SoC. Amlogic has the best chip on paper with S922 (and similar ones), but in the past they did some double-cross with frequencies and temperatures so people is reasonably skeptic on the real performances.
Despite lagging behind, Allwinner chips are at least very cheap with decent raw performance (H6 at least), but the company is a bit silly.
 
About linux and community support, Amlogic is the worst one by far, being quite obscure about their hardware and generally not very supportive of opensource.
Rockchip is the best one, a lot of their drivers are production ready in the mainline kernel. Recently although I saw quite a stop in their "proprietary" kernel and u-boot public forks. I don't know why they stopped, but I hope it's just a temporary reorganization: the effort they did in supporting opensource was very appreciated by the community and mainline kernel is very advanced on supporting their chips and peripherals.
Allwinner in the past was a total wreck, a lot of work by community has been done to reverse engineering things with excellent results and I think they now opened a bit more publishing especially documentation.
 
My two cents.

Yesterday, I ended up on the HPMicro website showing the illustration above about a 1 GHz MCU called HPM64G0. It looked interesting enough so I clicked on the link to a page with some documentation for the company’s HPM6700/6400 microcontrollers. But in typical Chinese fashion, I was asked for a mobile phone number to download the documents. No luck this time since a Chinese mobile phone number is required. If anybody can set up a mirror on Mega or other websites easily accessible outside of China that would be appreciated. But eventually, I found an article in Chinese on EETrend where we can learn more about the HPM64G0 which happens to be a 1GHz microcontroller based on the RISC-V architecture. We already had one of those for Arm with the NXP i.MX RT1170, but I had yet to see any RISC-V microcontrollers clocked at such a high frequency. HPMicro HPM64G0 [...]
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