reverse engineered

In keeping with my latest string of recreations, here's another one. I am working on recreating the 'hybrid module' from the non-backlit macintosh portable because these tend to die and do stupid things thanks to capacitor fluid damage or the coating cracking off of the high precision...

After Porchy from Jammaarcade got us across the finish line with reverse engineering the original HAL16L8, i thought the functions might be possible to replicate using discrete logic. This would of course be to benefit those that are making an SE Reloaded board, who don't want to, or can't...