Another day and another bit of reverse engineering of the Casablanca. I’ve beeped out the vast majority of the 96 pin expansion port from the main board to the video board.

As expected, 90% of it is just data lines, address lines, as well as power rails - with a few smatterings of control signals in there as well.

The next question is what the 12 or so remaining signals actually do. Three I’m fairly confident are interrupts, whilst the rest I’m not so sure. Supposedly the 68060 interface is based off an accelerator Macrosystem designed for the Amiga A3000, so it wouldn’t surprise me if the mystery signals are just DSACK, AS, DS, BERR and maybe an E clock