TITLE_x_SYS.txt

TITLE_*.SYS Files
=================
SYS files hold palette and sprite data for the game logo displayed in the CDZ
menu screen. There's one for each nationality, where the filename matches
TITLE_*.SYS; * is either 'J', 'U', or 'E'.

Palettes are stored first, there's space for 45 of them ($5A0 bytes).
Following that are 45 sprite tiles in the regular SPR file format, making a 9*5
tiles (144*80 pixels) logo. Tiles are mapped from left to right, top to bottom.

Palette note: Index 0 is transparent, and the area behind the game logo in
the CDZ menu screen is not entirely black. Proceed with caution.

todo: Create a tool that can generate a TITLE_*.SYS file from a .SPR file and
various .ngpal files. (blastar's NGFX can import from BMP/PNG/GIF files)

"See cdrom_load_title in cdrom.c of NEOCD 0.31":
void cdrom_load_title(void)
{
	char			Path[256];
	char			jue[4] = JUE;
	char			file[12] = TITLE_X_SYS;
	FILE			*fp;
	char			*Ptr;
	int				Readed;
	int				x, y;

	strcpy(Path, cdpath);

	file[6] = jue[m68k_read_memory_8(0x10FD83)&3];

	strcat(Path, file);

	fp = fopen(Path, "rb");
	if (fp==NULL)
	{
		return;
	}

	fread(video_paletteram_pc, 1, 0x5A0, fp);
	swab((char *)video_paletteram_pc, (char *)video_paletteram_pc, 0x5A0);

	for(Readed=0;Readed<720;Readed++)
		video_paletteram_pc[Readed] = video_color_lut[video_paletteram_pc[Readed]];

	Ptr = neogeo_spr_memory;

	Readed = fread(cdrom_buffer, 1, BUFFER_SIZE, fp);
	spr_conv(cdrom_buffer, Ptr, Readed, video_spr_usage);
	fclose(fp);

	Readed = 0;
	for(y=0;y<80;y+=16)
	{
		for(x=0;x<144;x+=16)
		{
			video_draw_spr(Readed, Readed, 0, 0, x+16, y+16, 15, 16);
			Readed++;
		}
	}

	(*blitter)();

	memset(neogeo_spr_memory, 0, 4194304);
	memset(neogeo_fix_memory, 0, 131072);
	memset(video_spr_usage, 0, 32768);
	memset(video_fix_usage, 0, 4096);
}