So cool! Happy to give you early feedback if you so wish. Best of luck with the project.

I like this.

for bonus points support all the same PEEKs and POKEs and CALLs that Applesoft BASIC did on the II series. even if it's not strictly part of the BASIC itself, but the integration between it and the hardware/BIOS, it would be nice. technically might be required to correctly run lots of the BASIC programs from that era. I know most of my own relied on them for certain effects.