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| == AGI256 ==
| | #REDIRECT [[AGI/Specifications/Other#AGI256]] |
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| AGI256 is a hack on the original PC AGI interpreter v2.936 by Dark Minister.
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| It adds 256-color background picture support to the AGI engine. It uses the default VGA palette.
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| === Implementation details ===
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| In the original PC AGI interpreter v2.936 the engine holds the color and priority/control
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| line information for each pixel in a 160x200 byte buffer. The color data for each pixel
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| is held in the byte's lower 4 bits and the priority/control line data is held in the upper
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| 4 bits.
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| AGI256 extends this 160x200 byte buffer to a 320x200 byte buffer so that the 256-color
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| data is held in the right 160x200 half of the buffer and the original style 16-color and
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| priority/control line information is held in the left 160x200 half of the buffer.
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| == AGI256-2 ==
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| AGI256-2 is an extension to AGI256 by Brian Provinciano. It adds 256-color view (i.e. sprite)
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| support to AGI256.
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| === Implementation details ===
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| As AGI256-2 is an extension to AGI256, all AGI256 implementation details apply here unless
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| otherwise noted.
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| AGI256-2 modifies the sprite drawing routine to handle non-RLE-encoded raw 256-color data. | |