Anyone good at guessing filenames?

[Dr. Kylstein]

Mode X's vary in their resolution, but they all use the same interlaced memory layout. For developers at the time, they had three options:
1. use the EGA modes and get hardware scrolling, split screen, fast vram to vram copies, and more.
2. use mode 13h which can't do any of that, but has 256 colors.
3. use a Mode X to get all the EGA-style features with 256 colors, at the expense of a weird memory layout.

[Malvineous]

Ahh fascinating, that explains it then.