[ColanderCombo]

I'm about to knock up an XMAP2 pinout in WinFIG.

Sweet.

I notice in the second image that the cyan background is missing green, but inside the text window the black background turns red. It seems like when the stripe crosses white pixels it turns black... which suggests to me that there may be one or more bad address lines between the XMAP and the color map ram? (so the wrong color map entries are getting selected.)

If you can boot to X11 I think there's a tool that lets you interactively create color maps. I'd be interested to see how that behaves on this system. Might help to isolate which lines are bad.