vga_flipattr
a = vga_flipattr(a, FALSE);
a = vga_flipattr(a, FALSE);
return (vga_flipattr(a, blink));
a = vga_flipattr(a, TRUE);
a = vga_flipattr(a, TRUE);
a = vga_flipattr(a, TRUE);
cursor_attr = vga_flipattr(cursor_attr, TRUE);
a = vga_flipattr(a, FALSE);
a = vga_flipattr(a, FALSE);