High Quality Content by WIKIPEDIA articles! The Luxor ABC 800 series are office-versions of the ABC 80 home computer. They featured an enhanced BASIC interpreter, a slightly faster clocked CPU and more memory: 32 kilolobytes RAM and 32 kB ROM was now standard, the Z80 is clocked at 3.58 MHz (using an NTSC color subcarrier crystal). It featured 40 x 24 text mode with 8 colors (ABC 800 C) or 80 x 24 text mode monochrome (ABC 800 M). They could also be extended with "high" resolution graphics (240 x 240 pixels, 2 bpp) using 16 kB RAM as video memory.