The PCW 8256 was launched in September 1985, and had 256 KB of RAM and one floppy disk drive. Launched a few months later, the PCW 8512 had 512 KB of RAM and two floppy disk drives. Both systems consisted of three units: a printer; a keyboard; and a monochrome CRT monitor whose casing included the processor, memory, motherboard, one or two floppy disk drives, the power supply for all the units and the connectors for the printer and keyboard. The monitor displayed green characters on a background that appeared black when the system was active. It measured 12 inches (30 cm) diagonally, and showed 32 lines of 90 characters each. The designers preferred this to the usual personal computer display of 16 64-character lines, as the larger size would be more convenient for displaying a whole letter. The monitor could also display graphics well enough for the bundled graphics program and for some games.