Add Boot Dreamcast BIOS option

Reload roms/flash when starting a new game
Better naomi reset (still have issues)
Fix error reporting with Naomi

core/hw/naomi/naomi.cpp

@@ -15,7 +15,7 @@ u32 naomi_updates;
 
 //#define NAOMI_COMM
 
-u32 BoardID=0x980055AA;
+static const u32 BoardID=0x980055AA;
 u32 GSerialBuffer=0,BSerialBuffer=0;
 int GBufPos=0,BBufPos=0;
 int GState=0,BState=0;
@@ -388,6 +388,7 @@ u32 reg_dimm_48;	//parameters
 u32 reg_dimm_4c=0x11;	//status/control reg ?
 
 bool NaomiDataRead = false;
+static bool aw_ram_test_skipped = false;
 
 void naomi_process(u32 r3c,u32 r40,u32 r44, u32 r48)
 {
@@ -552,6 +553,8 @@ void naomi_reg_Term()
 void naomi_reg_Reset(bool Manual)
 {
 	NaomiDataRead = false;
+	aw_ram_test_skipped = false;
+	BLastCmd = 0;
 }
 
 void Update_naomi()
@@ -632,7 +635,6 @@ void Update_naomi()
 
 static u8 aw_maple_devs;
 extern bool coin_chute;
-static bool once = false;
 
 u32 libExtDevice_ReadMem_A0_006(u32 addr,u32 size) {
 	addr &= 0x7ff;
@@ -645,10 +647,10 @@ u32 libExtDevice_ReadMem_A0_006(u32 addr,u32 size) {
 		//	c/d - 3P/4P coin inputs (EX. IO board), active low
 		//
 		//	(ab == 0) -> BIOS skip RAM test
-		if (!once)
+		if (!aw_ram_test_skipped)
 		{
 			// Skip RAM test at startup
-			once = true;
+			aw_ram_test_skipped = true;
 			return 0;
 		}
 		if (coin_chute)

core/hw/naomi/naomi_cart.cpp

@@ -636,11 +636,11 @@ bool naomi_cart_SelectFile()
 	if (!naomi_cart_LoadRom(SelectedFile))
 	{
 		printf("Cannot load %s: error %d\n", SelectedFile, errno);
+		cfgSetVirtual("config", "image", "");
+
 		return false;
 	}
 
-	cfgSaveStr("emu", "gamefile", SelectedFile);
-
 	return true;
 }
 

core/nullDC.cpp

@@ -96,10 +96,6 @@ s32 plugins_Init()
 	if (s32 rv = libGDR_Init())
 		return rv;
 #endif
-#if DC_PLATFORM == DC_PLATFORM_NAOMI || DC_PLATFORM == DC_PLATFORM_ATOMISWAVE
-	if (!naomi_cart_SelectFile())
-		return rv_serror;
-#endif
 
 	if (s32 rv = libAICA_Init())
 		return rv;
@@ -312,11 +308,25 @@ int dc_start_game(const char *path)
 	{
 		InitSettings();
 		LoadSettings(false);
+		settings.dreamcast.RTC = GetRTC_now();	// FIXME This shouldn't be in settings anymore
 #if DC_PLATFORM == DC_PLATFORM_DREAMCAST
-		if (DiscSwap())
+		if (!settings.bios.UseReios)
-			LoadCustom();
+#endif
+			LoadRomFiles(get_readonly_data_path(DATA_PATH));
+#if DC_PLATFORM == DC_PLATFORM_DREAMCAST
+		if (path == NULL)
+		{
+			// Boot BIOS
+			settings.imgread.LastImage[0] = 0;
+			TermDrive();
+			InitDrive();
+		}
+		else
+		{
+			if (DiscSwap())
+				LoadCustom();
+		}
 #elif DC_PLATFORM == DC_PLATFORM_NAOMI || DC_PLATFORM == DC_PLATFORM_ATOMISWAVE
-		LoadRomFiles(get_readonly_data_path(DATA_PATH));
 		if (!naomi_cart_SelectFile())
 			return -6;
 		LoadCustom();
@@ -355,6 +365,11 @@ int dc_start_game(const char *path)
 	if (plugins_Init())
 		return -3;
 
+#if DC_PLATFORM == DC_PLATFORM_NAOMI || DC_PLATFORM == DC_PLATFORM_ATOMISWAVE
+	if (!naomi_cart_SelectFile())
+		return -6;
+#endif
+
 	LoadCustom();
 
 #if FEAT_SHREC != DYNAREC_NONE

core/rend/gui.cpp

@@ -1268,6 +1268,17 @@ static void gui_display_content()
     {
 		ImGui::PushStyleVar(ImGuiStyleVar_ItemSpacing, ImVec2(8 * scaling, 20 * scaling));		// from 8, 4
 
+#if DC_PLATFORM == DC_PLATFORM_DREAMCAST
+		ImGui::PushID("bios");
+		if (ImGui::Selectable("Dreamcast BIOS"))
+		{
+			gui_state = ClosedNoResume;
+			cfgSetVirtual("config", "image", "");
+			gui_start_game("");
+		}
+		ImGui::PopID();
+#endif
+
         for (auto game : game_list)
         	if (filter.PassFilter(game.name.c_str()))
         	{
@@ -1470,7 +1481,7 @@ int msgboxf(const wchar* text, unsigned int type, ...) {
     va_start(args, type);
     vsnprintf(temp, sizeof(temp), text, args);
     va_end(args);
-    printf("%s", temp);
+    printf("%s\n", temp);
 
     gui_display_notification(temp, 2000);
 

core/serialize.cpp

@@ -617,7 +617,6 @@ extern u8 q_subchannel[96];
 
 //./core/hw/naomi/naomi.o
 extern u32 naomi_updates;
-extern u32 BoardID;
 extern u32 GSerialBuffer;
 extern u32 BSerialBuffer;
 extern int GBufPos;
@@ -1094,7 +1093,7 @@ bool dc_serialize(void **data, unsigned int *total_size)
 	REICAST_SA(q_subchannel,96);
 
 	REICAST_S(naomi_updates);
-	REICAST_S(BoardID);
+	REICAST_S(i);	//BoardID
 	REICAST_S(GSerialBuffer);
 	REICAST_S(BSerialBuffer);
 	REICAST_S(GBufPos);
@@ -1509,7 +1508,7 @@ static bool dc_unserialize_libretro(void **data, unsigned int *total_size)
 
 
 	REICAST_US(naomi_updates);
-	REICAST_US(BoardID);
+	REICAST_US(i); // BoardID
 	REICAST_US(GSerialBuffer);
 	REICAST_US(BSerialBuffer);
 	REICAST_US(GBufPos);
@@ -1900,7 +1899,7 @@ bool dc_unserialize(void **data, unsigned int *total_size)
 
 
 	REICAST_US(naomi_updates);
-	REICAST_US(BoardID);
+	REICAST_US(i); // BoardID
 	REICAST_US(GSerialBuffer);
 	REICAST_US(BSerialBuffer);
 	REICAST_US(GBufPos);