Firmware newer than 0.5.77BFA009 does not work with Yellowstone Expansion Card (Apple II)

[OhGeezCmon]

If you flash Apple II FN with anything newer than 0.5.77BFA009, CONFIG will not load on the Apple II, saying "CHECK DISK DRIVE". As soon as you flash it back to 0.5.77BFA009 it works as expected.

I'm using Masteries FN Revision 01 device, unknown if this happens on other revisions of the hardware.

As per Mozz, "I think the first step would be for someone to try and get the current master to build with platform 3.4. if it does not work (exhibits the same problems), then this would lead me to believe the problem is in our code. If it works fine, then it's some issue with the new platform version. I tried getting it to build, but got stuck on some errors."

I will try and follow Mozz's suggestion, unless somone else can determine if it's FN code or a platform issue.