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Apple Macintosh Display Card 8-24

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The Macintosh Display Card 8•24 provides the Apple Macintosh II family of modular computers with a single interface to all Apple displays and a broad range of graphics capabilities. The Macintosh Display Card 4•8 provides support for up to 256 colors or shades of gray on the Apple High­-Resolution Monochrome Monitor and the AppleColor High-Resolution RGB Monitor. In addition, it provides for up to 16 levels of gray on the Apple Macintosh Portrait Display and the Apple Two-Page Monochrome Monitor. The Macintosh 8•24 Display Card supports all Apple displays to the maximum of their capabilities, includ­ing full 256-level true gray scale-all the shades of gray that the eye can perceive-on all Apple displays. The card also supports full 24-bit true color on the AppleColor High-Resolution RGB Monitor, allowing you to generate images of photographic quality by dis­playing up to 16.7 million colors simultaneously.

In addition to letting you display and work with photo­graphic-quality images, true gray-scale and true color capabilities allow you to work with lifelike simulations, anima­tions, and visual effects. The Macintosh Display Card 4•8 can be upgraded to the Macintosh Display Card 8•24 by using the Macintosh Display Card VRAM Expansion Kit. Both cards also support RS-170 standard timing, for compatibility with numerous interlaced video devices. In addition, the Macintosh Display Card 8•24 provides the highest-possible­ quality interlaced video through the use of Apple Convolution. A capability that is usually associated with much more expensive systems, Apple Convolution evaluates adjacent lines and pixels on interlaced video devices, then adjusts the image on the screen to provide smoother, more continuous images than could otherwise be generated.

The Macintosh Display Card 4•8 and Macintosh Display Card 8•24 provide a wide range of graphics capabilities, which, when combined with the power of the Macintosh II family of computers, enable you to take advantage of sophisticated applications and produce powerful results.

  • Convolution available for RS-170 interlaced video to up to 8 bits per pixel (256 colors) on the Macintosh Display Card 8•24.
  • In 24-bit mode, provides direct access to 16.7 million colors, driving 8-bit DACs (digital-analog converters) for each of the three RGB channels. In other modes, provides a palette of up to 256 colors out of 16.7 million.

See Also