The prototype SD interface cards are here. One minor board layout problem exists, so it’s a couple cuts and one jumper to fix. The FLEX drivers are written but I just haven’t put it all together yet. Lately I’ve been in a hardware mood, but will get back to software over the next couple of weeks.
Right now my CAD program is generating the Gerber files for the new 6800/6809 motherboard that should support the existing 6800 CPU card and also the 6809 CPU that I’m getting back to. Prototype boards should arrive in about two weeks for testing. The plan is to discontinue the existing 6800-only motherboard and only use the new one.
The other new board is a SS-30 expander that adds slots 2 to 7 using the expansion connector on the motherboard. This board will work with both the existing and the new motherboards.