 The BIOS offers some text modes for a VGA adapter, which have 80×25, 40×25, 80×43 or 80×50 text grid.Each cell may choose from one of 16 available colors for its foreground and eight colors for the background; the eight background colors allowed are the ones without the high-intensity bit set.Each character may also be made to blink; all that are set to blink will blink in unison.