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→Technical: wp malware
*The [[COLORMAP]] lump contains 32 maps. The [[PLAYPAL]] lump has only the first level, though most of its colors are already in their definitive version (color ranges 3-15 and 160-249 are different, 0-2, 16-159 and 250-255 are identical).
*The single map is made of several lumps starting with M_. The map format is extremely different from the final version.
*The wad also contains two other lumps, VIEWINFO and HIGHBLIT. HIGHBLIT contains x86 assembly code to paint the "empty" region inside the HUD. This means that the HUD was not an overlay drawn over the rendered world, and that the shape of the view window could have been customized in a WAD file with custom assembly. On the other hand, it would have made Doom harder to port to different architectures, and custom HIGHBLIT lumps could have been used as an attack vector for {{wp|malware}}.
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