debian man page for _set_color

_set_color(3alleg4)						  Allegro manual					       _set_color(3alleg4)

NAME
       _set_color - Inline version of set_color(). Allegro game programming library.

SYNOPSIS
       #include <allegro.h>

       void _set_color(int index, const RGB *p);

DESCRIPTION
       This  is an inline version of set_color(), intended for use in the vertical retrace simulator callback function (retrace_proc, which is now
       deprecated).

       If you really must use _set_color from retrace_proc, note that it should only be used under DOS, in VGA mode  13h  and  mode-X.	Some  SVGA
       chipsets  aren't  VGA  compatible  (set_color()	and  set_palette() will use VESA calls on these cards, but _set_color() doesn't know about
       that).

SEE ALSO
       set_color(3alleg4), set_gfx_mode(3alleg4), ex3buf(3alleg4)

Allegro 							   version 4.4.2					       _set_color(3alleg4)