Hi Falter, Robbbert, et al.
Try this and let us know what you get:
#SHOW ALL CHARACTERS
10 FOR T = 0 TO 255
20 POKE 57344+T,T
30 NEXT
40 FOR T = 0 TO 255
50 poke 53248+T,T
60 NEXT
RUN
# TURN COLOUR ON
POKE 56832,4
Should look something like:
Cheers,
Red