Apple II Green Display - Model A2M2010P

Green Phosphor composite Monitor for Apple II computers. The Apple II video controller displayed 24 lines by 40 columns of monochrome, upper-case-only (the original character set matches ASCII characters 0x20 to 0x5F) text on the screen. The text and graphics screens had a somewhat outdated arrangement (the scanlines were not stored in sequential areas of memory) which was reputedly due to Wozniak's realization that doing it that way would save a chip; it was less expensive to have software calculate or look up the address of the required scanline than to include the extra hardware.

The Apple II Green Display A2M2010P is a composite monitor capable of producing shades of green. The display is inset on a swivel that can be angled for more comfortable viewing. The Apple IIe has two text modes: 40-columns text (24 lines, 5 x 7 dot matrix), and 80-columns text (24 lines, 5 x 7 dot matrix)(80 Column Card required). It has three graphics modes: low-resolution 16-color graphics (40h x 48v color blocks, 40h x 40v with four lines of text), high-resolution 6-color graphics (280h x 192v dots, 280h x 160v with four line of text), and double high-resolution 16-color graphics (560h x 192v dots)(80 Column Card required). Since the monitor cannot display color, it cannot take full advantage of the IIe's color modes. A color television with AV jacks can be used if you do not have a color composite monitor, but the low resolution of a television CRT keeps you from enjoying the use of 80 columns. 80 columns on a television screen looks fuzzy, but 40 columns is not problem.

Related Links :

• The Apple IIe at www.old-computers.com
• wikipedia.org/wiki/Apple_II_series
• http://vectronicsappleworld.com/collection/appleiie.html

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