Bobtidey - Changing the RAM to 48k seems to work as you suggest. As far as I can tell this is now fully functional. I have included the source and updated .HEX files one more time, but do need to find a way to post these somewhere! Since I took out the dependency on the modified SYS, perhaps this version and your “wildcat” version have the same functionality?
So, for anyone watching, you should not be able to use the “community version” with the new hardware.
DSO203HW272.zip (149 KB)