<p>wait I bet it's drivers!<br />like, one version of this function is called by VGA_DrawFuncUnknown and nothing else. <br />Another one? CGA/Hercules.<br />the third? EGA<br />The last? Tandy.</p><p>They compiled the 4 video drivers separately, and then linked them into the EXE, with no deduplication across compile units</p>
