tilemap.get_info_debug: don't access invalid gfxnum

src/emu/tilemap.cpp

@@ -1559,10 +1559,14 @@ void tilemap_t::get_info_debug(u32 col, u32 row, u8 &gfxnum, u32 &code, u32 &col
 	// get the GFX number and code
 	gfxnum = m_tileinfo.gfxnum;
 	code = m_tileinfo.code;
+	color = m_tileinfo.palette_base;
 
+	if (gfxnum != 0xff)
+	{
 		// work back from the palette base to get the color
 		const gfx_element &gfx = *m_tileinfo.decoder->gfx(gfxnum);
-	color = (m_tileinfo.palette_base - gfx.colorbase()) / gfx.granularity();
+		color = (color - gfx.colorbase()) / gfx.granularity();
+	}
 }
 
 

src/mame/namco/namcos22.cpp

@@ -30,8 +30,8 @@ TODO:
   + ridgerac waving flag shadowing
   + cybrcomm enemies should flash white when you shoot them, probably lighting related
   + timecris helicopter, car, grenade boxes should flash white when you shoot them (similar to cybrcomm)
-- improve ss22 spot, used in dirtdash, alpinesa, testmode, not understood well:
-  + does not work at all on alpinesa highscore entry
+- improve ss22 spot, used in dirtdash, alpinesa, testmode - not understood well:
+  + does not work at all on alpinesa highscore entry (maybe not spotram related?)
   + should be done before global fade, see dirtdash when starting at jungle level
   + should not apply to some of the sprites in dirtdash jungle level (eg. time/position)
   + how is it enabled exactly? the enable bit in spotram is set in tokyowar too(which doesn't use spot)
@@ -41,6 +41,7 @@ TODO:
 - PDP command 0xfff9, used in alpinr2b to modify titlescreen logo animation in pointram (should show a snow melting effect)
 - support for text layer video partial updates after posirq, alpinesa does raster effects on it
 - alpha blended sprite/poly with priority over alpha blended text doesn't work right
+- alpinesa sprites on selection screen should not be fully alpha blended, only the drop shadow should
 - ss22 poly translucency is probably more limited than currently emulated, not supporting stacked layers
 - there's a sprite limit per scanline, eg. timecris submarine explosion smoke partially erases sprites on real hardware
 - cybrcycc speed dial needle polygon is missing

src/mame/thepit/thepit_v.cpp

@@ -135,8 +135,6 @@ void thepit_state::video_start()
 
 	m_dummy_tile = make_unique_clear<uint8_t[]>(8*8);
 
-	m_graphics_bank = 0;    /* only used in intrepid */
-
 	m_vsync_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(thepit_state::vsync_callback), this));
 
 	save_item(NAME(m_graphics_bank));
@@ -319,5 +317,7 @@ uint32_t thepit_state::screen_update_desertdan(screen_device &screen, bitmap_ind
 	m_graphics_bank = 1;
 	draw_sprites(bitmap, m_flip_y ? spritevisibleareaflipx : spritevisiblearea, 1);
 
+	m_graphics_bank = 0;
+
 	return 0;
 }