PR7682 improvements: drivers, writer.py, docs.

README.md

@@ -211,7 +211,9 @@ code. This stuff is easier than you might think.
 As of Aug 2021 color displays can benefit from a substantial performance boost
 in rendering text. To take advantage of this, firmware should be dated after
 26 Aug 21. The display driver and GUI core files should be updated. Ensure that
-the new file `drivers/boolpalette.py` exists on the target hardware.
+the new file `drivers/boolpalette.py` exists on the target hardware. Usge of
+this mode is automatic but can be checked by running the `aclock.py` demo which
+reports the status at the REPL.
 
 ###### [Contents](./README.md#contents)
 

gui/demos/aclock.py

@@ -31,7 +31,7 @@ def aclock():
               'Aug', 'Sept', 'Oct', 'Nov', 'Dec')
     # Instantiate CWriter
     CWriter.set_textpos(ssd, 0, 0)  # In case previous tests have altered it
-    wri = CWriter(ssd, arial10, GREEN, BLACK, verbose=False)
+    wri = CWriter(ssd, arial10, GREEN, BLACK)  # Report on fast mode. Or use verbose=False
     wri.set_clip(True, True, False)
 
     # Instantiate displayable objects