monogfx, gfx_lores, gfx_hires now all uses 8kb stack from buffers module; no more broken flood fills. fill() has an extra byte parameter now where you need to pass in the ram bank to use for the stack. (not on virtual target)

docs/source/todo.rst

@@ -1,6 +1,8 @@
 TODO
 ====
 
+virtual:  importing buffers in main results in a vm error?
+
 document the @R0 - @R15 register support for normal subroutine parameters (footgun!)
 
 make a compiler switch to disable footgun warnings