Color On The Apple II
See also: List of 8-bit computer hardware palettes#Apple II seriesThe Apple II video output is really a monochrome display based upon the bit patterns in the video memory (or pixels). These pixels are combined in quadrature with the colorburst signal to be interpreted as color by a composite video display.
High resolution provides two pixels per colorburst cycle, allowing for two possible colors if one pixel is on, black if no pixels are on, or white if both pixels are on. By shifting the alignment of the pixels to the colorburst signal by 90°, two more colors can be displayed for a total of four possible colors. Low resolution allows for four bits per cycle, but repeats the bit pattern several times per low resolution pixel. Double high resolution also displays four pixels per cycle. (Again, a 90° phase shift would double the colors available, but is not supported in double high resolution mode). See the sections below for more details.
Read more about this topic: Apple II Graphics, Graphics Mode Details
Famous quotes containing the words color and/or apple:
“When a bachelor of philosophy from the Antilles refuses to apply for certification as a teacher on the grounds of his color I say that philosophy has never saved anyone. When someone else strives and strains to prove to me that black men are as intelligent as white men I say that intelligence has never saved anyone: and that is true, for, if philosophy and intelligence are invoked to proclaim the equality of men, they have also been employed to justify the extermination of men.”
—Frantz Fanon (1925–1961)
“She was so overcome by the splendor of his achievement that she took him into the closet and selected a choice apple and delivered it to him, along with an improving lecture upon the added value and flavor a treat took to itself when it came without sin through virtuous effort. And while she closed with a Scriptural flourish, he “hooked” a doughnut.”
—Mark Twain [Samuel Langhorne Clemens] (1835–1910)