We can build kernel modules . . .
Why not an 8bpp -> 4bpp shim module to add to the stack of several lab126 shim modules?
Yes, I know, there is a difference between being able to build a module and being able to write a module.
It was just a passing brain fart (no pun intended).
"Hack is just a four letter word." - - With apologies to B. Dylan - -> JB on BD