 The Commodore 128 had two video display modes, which were usually used singularly, but could be used simultaneously if the computer was connected to two compatible video monitors.The VIC-II chip, also found in the Commodore 64, was mapped directly into main memory—the video memory and CPUs (the 8502 and Z80A processors) shared a common 128 KB RAM, and the VIC-II control registers were accessed as memory locations (that is, they were memory mapped).Unlike the VIC-II, the 8568 had its own local video RAM, 64K in the C-128DCR model (sold in North America) and, depending on the date of manufacture of the particular machine, either 16 or 64K in the C-128D model (marketed in Europe).