static const pen_t pens_from_color_prom[] =
{
	rgb_t::black,
	rgb_t(0x00, 0xff, 0x00),
	rgb_t(0x00, 0x00, 0xff),
	rgb_t(0x00, 0xff, 0xff),
	rgb_t(0xff, 0x00, 0x00),
	rgb_t(0xff, 0xff, 0x00),
	rgb_t(0xff, 0x00, 0xff),
	rgb_t::white
};