Just thought I'd create a new thread for posting progress on my (maybe) coming boards, rather than cluttering the M4 thread even more.
A short video of the current progress of Galaxy board (booting SymbOS).
https://youtu.be/NAWO1etR-vQNow RAM expansion is working (allocated 320KB for the CPC/GX4000 for now).
Still need to implement USB keyboard, FDC emulation and more...
Of other interesting features:
I can now set hardware breakpoints on code execution and fully monitor all HW regs, probably this will develop into at least doing snapshots on the fly.
Zen80 board ?This is a planned external version of Galaxy board, but with 8MB SDRAM.
More to come on this, once I am satisfied with the Galaxy board hardware design (hopefully next revision).
EDIT: updated with a few pictures of galaxy board, mounted in a GX4000.