set_palette_range - Sets a specific range of the palette. Allegro game programming library.

       Sets  the  palette  entries between from and to (inclusive: pass 0 and 255 to set the entire palette). If
       vsync is set it waits for the vertical retrace, otherwise it sets the colors immediately. Example:

          PALETTE palette;
          ...
          /* Modify the first 16 entries. */
          change_first_16_colors(palette);
          /* Now update them waiting for vsync. */
          set_palette_range(palette, 0, 15, 1);

       set_palette_range - Sets a specific range of the palette. Allegro game programming library.

set_palette(3alleg4), get_palette_range(3alleg4), exzbuf(3alleg4)

Allegro                                           version 4.4.3                       set_palette_range(3alleg4)

#include<allegro.h>voidset_palette_range(constPALETTEp,intfrom,intto,intvsync);