Replying to
50MHz is a lot more than the (roughly) 1MHz that C64 came with.
Have to google the C64U...
(FWIW my Beeb model B had 2 MHz on (basically) the same CPU).
Oslo, Norway, somebody's son, someone's man, somebody's dad. Boy from the north, living in the south. Electronics engineer and software developer, occasional motorcycle rider, former "alpin-pappa"