C64 to C128 PSU Adapter Cable Ribbon cable but you may be able

but you may be able to use less

depending on both the specific graphics chip in your C64

please note that a PC drive will be able to read/write Amiga floppies without any issues

When the power consumption is then measured at the mains socket

C64 to C128 PSU Adapter Cable Ribbon cable but you may be ablePower adapter converting Commodore 64 DIN7 round plug to Commodore 128 DIN5 square plug. Conveys +5V DC and 9V AC. Matches C64 pinout on one side, and C128 pinout on the second side. For using an ordinary Commodore 64 power supply with a Commodore 128 system. Features Converts Commodore C64 pinout to Commodore C128 Conveys 9V AC and +5V DC Round DIN7 plug (female) and square DIN5 plug (male) For use exclusively with Commodore 64 and 128 High quality