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Hold-And-Modify, also known as HAM, is a display mode for the Amiga to support the full range of 4096 colors.

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  • Hold-And-Modify
  • Hold-and-Modify
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  • Hold-And-Modify, also known as HAM, is a display mode for the Amiga to support the full range of 4096 colors.
  • Hold-and-Modify (more commonly known as HAM) is a screenmode of the Amiga micro computer. It works by either using one of 16 colors in the palette or by holding the color of the last displayed pixel and then modifying its red, green, or blue component. This allowed the computer to display up to 4096 colors with only 6 bits available to indicate the color.
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  • Hold-and-Modify (more commonly known as HAM) is a screenmode of the Amiga micro computer. It works by either using one of 16 colors in the palette or by holding the color of the last displayed pixel and then modifying its red, green, or blue component. This allowed the computer to display up to 4096 colors with only 6 bits available to indicate the color. A disadvantage was that some color changes take 3 pixels to occur, so if one chose the 16 palette colors poorly the artifacting could become frequent and glaringly obvious, vaguely similar to the compression artifacts seen in the JPEG graphics format. The pseudo-12-bit HAM mode was upgraded on AGA based systems to provide a pseudo-18-bit display mode called HAM-8 (and giving reason to call the older mode HAM-6). In the early days of multimedia, HAM mode gave the Amiga a graphical advantage over competing systems, because it allowed the system to display digitized photographs and some rendered 3D images at a level claimed to be "photorealistic" at the time.
  • Hold-And-Modify, also known as HAM, is a display mode for the Amiga to support the full range of 4096 colors.
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