[jpegqs]

I recently ordered and researched the cheapest feature phones (and some smartwatches), looks like half of that market is occupied by Unisoc with the SC6531(E/DA) chipset (from the Spreadtrum company they bought). It uses Mocor OS. The second half of this market is occupied by Mediatek MT6260/MT6261 chipsets. I wrote tools to run my code on these chipsets.

There are also phones on Mocor5 OS, a little more expensive, it's actually Android 4.4 on the Spreadtrum SC7715 chipset.

I didn't find any Java here, but these CPUs have a Jazelle ARM extension to run Java bytecode.

P.S.: There's an old project based on reverse engineered MT6260 firmware: https://github.com/xobs/fernly

[jpegqs]

I wanted to run Doom on one of them. So far I have LCD control for SC6531E (with 9306 LCD panel), USB control for SC6531E/SC6531DA and USB control for MT6260/MT6261 (using API from bootloader).

I load the code not while the OS is running, but through boot via USB.

SC6531DA is similar to SC6531E, but some constants have been changed, so additional research into its firmware is required.

I have enough knowledge to run some game on the SC6531E, but a lot of work still needs to be done.

Anyone want to cooperate with me?

[initramfs]

I've been curious as to the Unisoc T117 RTOS in the Nokia 225 4G- it is Mocor RTOS, but I have no info on what its origins are. Could it be an EKA2-based Symbian? The UI looks somewhat similar https://www.nokia.com/phones/en_us/nokia-225-4g https://en.wikipedia.org/wiki/List_of_UNISOC_processors -uses only 1 cpu https://web.archive.org/web/20220704160232/https://www.uniso...