Aldi's C-64 lacked a 9V on the user port, which affected hardware that was attached there, but while some units do indeed have this limitation repaired, many did not. Internally, the motherboard was redesigned to minimize production costs, most of the TTL chips were removed, replaced with a new MMU chipset. First releases of this board had some compatibility problems with C=64 peripherals - they lacked the 9V user port voltage, but this limitation was repaired in the next revisions.
Although made in USA, the Aldi was sold only in Germany as a game machine through only one distribution channel, a supermarket chain called... Aldi, hence his name, given by the German 64'er magazine.
In 1989, the C=64 Aldi would be replaced by the grey C=64G which would use the same motherboard.
The Commodore 64 (short: C-64; alternative CBM64, C=64, VIC-64, in Germany VC-64) is the most favored and best-selling home computer of the 80's, which was built from 1982 until 1993. The C-64 is the successor of the first colour video home computer VIC20. The successor of the C-64 is the C128, which was sold as an office-computer. The C-64 was voted the computer of the year twice in the category home computer by an international committee of journalists from computer magazines.