Interesting information from Taneli Lukka
Because of the re-design of this machine the sound
from the legendary SID-chip is more quiet and dosn't sound as good as the
original one. Due to this many people who made music with their C=64
dislike this model.
In my opinion the keyboard is just as good/bad as the original as they are
mechanically identical and are also interchangeable so you can easily make
a C=64 with the C-model keyboard, only the caps are different. The C-model
keys do look messier than the original ones because graphical symbols are
now mounted on top of the buttons instead of the side. Only very early
production examples have the symbols on the sides.
It seems that there are two
completely different C=64c revisions. The one with the MOS 8500 processor
and smaller motherboard seems to be the most common. But there is also a
version which is either a very early or very late production model. At
first glance it is impossible to see the diffirence, but when you turn the
machine upside down you can see the first of them: there are no screws to
hold case together, just three plastic "clips" in place of the
normal screws that you have to push through with a screwdriver to take the
machine apart. There is also no model sticker, just an empty slot with the
serial number sticker on it, the model text and other info is molded on
the case on the right side of the empty slot and this text says that the
machine is made in West-Germany instead of Hong Kong like most c-model
The differences come even more apparent as you open the machine. The
keyboard is held on the upper part of the case with plastic clips instead
of being screwed into the lower part on two metal "legs" like on
the more common revision. The motherboard is the old big one with the MOS
6510 and old SID and the power led cable is very long because the led is
on the opposite side of the machine when compared to the old
"breadbin" C=64 for which this motherboard was designed.
This revision seems to be very rare as i have only encountered one of them
and i have cleaned and fixed god knows how many C=64's. It seems that
Commodore really tried to save screws when designing this thing, but using
the old motherboard which was more expensive to produce doesn't make
sense. The machine can't be a shop modification because it is clearly
factory made and the smaller motherboard wont fit in the case, i tried.
It seems that i have reached the end
in my hunt C=64c revisions.
The specifications for the revision that seems to be the very first one
• Graphical symbols are on the front edge of the keys.
• Made in West-Germany
• Case is held together with 3 screws
• Keyboard is mounted on the lower part of the case on two metal
• The origina bigl motherboard is still used.
• The power supply is like the old "breadbin" model, but made
out of cream coloured plastic.
In the end the rarest revision seems to be the second one with no screws.
It seems that the new small motherboard didn't kick in until production
was moved to Hong Kong so Commodore just used up their old stock of big
motherboards in Germany before moving the production. At the same time
they seem to have experimented with diffirent case and power supply
From Petrvs (Argentina):
In 1988 a local Argentine company, Drean, mainly
known for its washing machines, started to sell the "Drean Commodore
64C". It was basically the same computer as the original 64C but with
PAL-N video output.
As most of the existing local Commodores 64 and 64C were NTSC the Drean
machine had some "compatibility" problems.