[andrewstuart]

These chips appear to be 8051s with multi hundred MHz DACs.

Be fun to program them but I can’t find any programmable devboards with the Capstone CS5213.

[benj111]

Theres been some work on the firmware for the Realtek RTD2660H LCD driver that's also 8051 based.

I believe pine/the community worked on that. They may have some how tos / pointers.