diff --git a/include/core/misc.hpp b/include/core/misc.hpp
index 17adc9fb..ab773151 100644
--- a/include/core/misc.hpp
+++ b/include/core/misc.hpp
@@ -37,26 +37,6 @@ void set_random_seed(const std::string& seed) throw(std::bad_alloc);
  */
 void set_random_seed() throw(std::bad_alloc);
 
-/**
- * \brief Load a ROM.
- *
- * Given commandline arguments, load a ROM.
- *
- * \param cmdline The command line.
- * \return The loaded ROM set.
- * \throws std::bad_alloc Not enough memory.
- * \throws std::runtime_error Can't load the ROMset.
- */
-struct loaded_rom load_rom_from_commandline(std::vector<std::string> cmdline) throw(std::bad_alloc,
-	std::runtime_error);
-
-/**
- * \brief Dump listing of regions to graphics system messages.
- *
- * \throws std::bad_alloc Not enough memory.
- */
-void dump_region_map() throw(std::bad_alloc);
-
 /**
  * \brief Fatal error.
  *
diff --git a/include/core/moviefile.hpp b/include/core/moviefile.hpp
index e301ac72..93f3d277 100644
--- a/include/core/moviefile.hpp
+++ b/include/core/moviefile.hpp
@@ -47,7 +47,7 @@ struct moviefile
 /**
  * What is the ROM type and region?
  */
-	gametype_t gametype;
+	std::string gametype;
 /**
  * What's in port #1?
  */
@@ -73,13 +73,13 @@ struct moviefile
  */
 	std::string rerecords;
 /**
- * SHA-256 of main ROM (empty string if none).
+ * SHA-256 of main ROMs (empty string if none).
  */
-	std::string rom_sha256;			//SHA-256 of main ROM.
+	std::vector<std::string> main_checksums;
 /**
- * SHA-256 of main ROM XML (empty string if none).
+ * SHA-256 of main ROM XMLs (empty string if none).
  */
-	std::string romxml_sha256;		//SHA-256 of main ROM XML.
+	std::vector<std::string> markup_checksums;
 /**
  * SHA-256 of slot A ROM (empty string if none).
  */
@@ -181,5 +181,7 @@ struct moviefile
 };
 
 std::string sanitize_prefix(const std::string& in) throw(std::bad_alloc);
+void copy_romdata_to_movie(struct moviefile& movie, const struct loaded_rom& r);
+
 
 #endif
diff --git a/include/core/rom.hpp b/include/core/rom.hpp
index 5cb99318..03f8750b 100644
--- a/include/core/rom.hpp
+++ b/include/core/rom.hpp
@@ -5,179 +5,9 @@
 #include <map>
 #include <vector>
 #include <stdexcept>
+#include "interface/core.hpp"
 #include "misc.hpp"
 
-/**
- * Region of ROM.
- */
-enum rom_region
-{
-/**
- * Autodetect region
- */
-	REGION_AUTO = 0,
-/**
- * (force) PAL region
- */
-	REGION_PAL,
-/**
- * (force) NTSC region
- */
-	REGION_NTSC
-};
-
-/**
- * Major type of ROM
- */
-enum rom_type
-{
-/**
- * Ordinary SNES ROM
- */
-	ROMTYPE_SNES,
-/**
- * BS-X Slotted ROM.
- */
-	ROMTYPE_BSXSLOTTED,
-/**
- * BS-X (non-slotted) ROM.
- */
-	ROMTYPE_BSX,
-/**
- * Sufami Turbo ROM.
- */
-	ROMTYPE_SUFAMITURBO,
-/**
- * Super Game Boy ROM.
- */
-	ROMTYPE_SGB,
-/**
- * No ROM.
- */
-	ROMTYPE_NONE
-};
-
-/**
- * This enumeration enumerates possible ROM types and regions for those.
- */
-enum gametype_t
-{
-/**
- * NTSC-region SNES game
- */
-	GT_SNES_NTSC = 0,
-/**
- * PAL-region SNES game
- */
-	GT_SNES_PAL = 1,
-/**
- * NTSC-region BSX slotted game
- */
-	GT_BSX_SLOTTED = 2,
-/**
- * NTSC-region BSX (non-slotted) game
- */
-	GT_BSX = 3,
-/**
- * NTSC-region sufami turbo game
- */
-	GT_SUFAMITURBO = 4,
-/**
- * NTSC-region Super Game Boy game
- */
-	GT_SGB_NTSC = 5,
-/**
- * PAL-region Super Game Boy game
- */
-	GT_SGB_PAL = 6,
-/**
- * Invalid game type
- */
-	GT_INVALID = 7
-};
-
-/**
- * Translations between diffrent representations of type.
- */
-class gtype
-{
-public:
-/**
- * Translate from major ROM type and region to string representation of the type.
- *
- * parameter rtype: The major ROM type.
- * parameter region: Region.
- * returns: String representation of combined type/region.
- * throws std::bad_alloc: Not enough memory.
- * throws std::runtime_error: Invalid type.
- */
-	static std::string tostring(rom_type rtype, rom_region region) throw(std::bad_alloc, std::runtime_error);
-/**
- * Translate major/region combination to string representation.
- *
- * This function produces the same IDs as the other tostring(), except that it can't produce arbitrary-region ones.
- *
- * parameter gametype: Type of the game.
- * returns: String representation of the type.
- * throws std::bad_alloc: Not enough memory.
- * throws std::runtime_error: Invalid type.
- */
-	static std::string tostring(gametype_t gametype) throw(std::bad_alloc, std::runtime_error);
-/**
- * Combine major/region into game type.
- *
- * For arbitrary-region types, this gives NTSC types.
- *
- * parameter rtype: Major type.
- * parameter region: The region.
- * returns: The combined game type.
- * throws std::bad_alloc: Not enough memory.
- * throws std::runtime_error: Invalid type.
- */
-	static gametype_t togametype(rom_type rtype, rom_region region) throw(std::bad_alloc, std::runtime_error);
-/**
- * Parse string representation to game type.
- *
- * parameter gametype: The game type to parse.
- * returns: The parsed game type.
- * throws std::bad_alloc: Not enough memory.
- * throws std::runtime_error: Invalid type.
- */
-	static gametype_t togametype(const std::string& gametype) throw(std::bad_alloc, std::runtime_error);
-/**
- * Parse string representation into major type.
- *
- * parameter gametype: The game type to parse.
- * returns: The major type.
- * throws std::bad_alloc: Not enough memory.
- * throws std::runtime_error: Invalid type.
- */
-	static rom_type toromtype(const std::string& gametype) throw(std::bad_alloc, std::runtime_error);
-/**
- * Extract major type out of game type.
- *
- * parameter gametype: the game type to parse.
- * returns: The major type.
- */
-	static rom_type toromtype(gametype_t gametype) throw();
-/**
- * Extract region out of game type.
- *
- * parameter gametype: the game type to parse.
- * returns: The region.
- * throws std::bad_alloc: Not enough memory.
- * throws std::runtime_error: Invalid type.
- */
-	static rom_region toromregion(const std::string& gametype) throw(std::bad_alloc, std::runtime_error);
-/**
- * Extract region out of game type.
- *
- * parameter gametype: the game type to parse.
- * returns: The region.
- */
-	static rom_region toromregion(gametype_t gametype) throw();
-};
-
 /**
  * This structure gives all files associated with given ROM image.
  */
@@ -212,35 +42,19 @@ struct rom_files
 /**
  * Major ROM type.
  */
-	enum rom_type rtype;
+	struct systype_info_structure* rtype;
 /**
  * Game region (the region ROM is to be loaded as)
  */
-	enum rom_region region;
+	struct region_info_structure* region;
 /**
- * Relative filename of main ROM file.
+ * ROM slots.
  */
-	std::string rom;
+	std::vector<std::string> main_slots;
 /**
- * Relative filename of main ROM XML file.
+ * ROM markup slots.
  */
-	std::string rom_xml;
-/**
- * Relative filename of slot A ROM file (non-SNES only).
- */
-	std::string slota;
-/**
- * Relative filename of slot A XML file (non-SNES only).
- */
-	std::string slota_xml;
-/**
- * Relative filename of slot B ROM file (Sufami Turbo only).
- */
-	std::string slotb;
-/**
- * Relative filename of slot B XML file (Sufami Turbo only).
- */
-	std::string slotb_xml;
+	std::vector<std::string> markup_slots;
 };
 
 /**
@@ -260,12 +74,13 @@ struct loaded_slot
  *
  * parameter filename: The filename to read. If "", empty slot is constructed.
  * parameter base: Base filename to interpret the filename against. If "", no base filename is used.
+ * parameter slot: The rom slot this is for.
  * parameter xml_flag: If set, always keep trailing NUL.
  * throws std::bad_alloc: Not enough memory.
  * throws std::runtime_error: Can't load the data.
  */
-	loaded_slot(const std::string& filename, const std::string& base, bool xml_flag = false)
-		throw(std::bad_alloc, std::runtime_error);
+	loaded_slot(const std::string& filename, const std::string& base, struct rom_info_structure& slot,
+		bool xml_flag = false) throw(std::bad_alloc, std::runtime_error);
 
 /**
  * This method patches this slot using specified IPS patch.
@@ -343,42 +158,25 @@ struct loaded_rom
 /**
  * ROM type
  */
-	enum rom_type rtype;
+	struct systype_info_structure* rtype;
 /**
  * ROM region (this is the currently active region).
  */
-	enum rom_region region;
+	struct region_info_structure* region;
 /**
  * ROM original region (this is the region ROM is loaded as).
  */
-	enum rom_region orig_region;
+	struct region_info_structure* orig_region;
 /**
- * Loaded main ROM
+ * Loaded main ROMs
  */
-	loaded_slot rom;
+	std::vector<loaded_slot> main_slots;
 /**
- * Loaded main ROM XML
+ * Loaded ROM markups
  */
-	loaded_slot rom_xml;
+	std::vector<loaded_slot> markup_slots;
 /**
- * Loaded slot A ROM (.bs, .st or .dmg)
- */
-	loaded_slot slota;
-/**
- * Loaded slot A XML (.bs, .st or .dmg)
- */
-	loaded_slot slota_xml;
-/**
- * Loaded slot B ROM (.st)
- */
-	loaded_slot slotb;
-/**
- * Loaded slot B XML (.st).
- */
-	loaded_slot slotb_xml;
-
-/**
- * Patch the ROM.
+ * Patch the ROMs.
  *
  * parameter cmdline: The command line.
  * throws std::bad_alloc: Not enough memory.
@@ -396,43 +194,6 @@ struct loaded_rom
 	void load() throw(std::bad_alloc, std::runtime_error);
 };
 
-/**
- * Recognize the slot this ROM goes to.
- *
- * parameter major: The major type.
- * parameter romname: Name of the ROM type.
- * returns: Even if this is main rom, odd if XML. 0/1 for main slot, 2/3 for slot A, 4/5 for slot B. -1 if not valid
- *	rom type.
- * throws std::bad_alloc: Not enough memory
- */
-int recognize_commandline_rom(enum rom_type major, const std::string& romname) throw(std::bad_alloc);
-
-/**
- * Recognize major type from flags.
- *
- * parameter flags: Flags telling what ROM parameters are present.
- * returns: The recognzed major type.
- * throws std::bad_alloc: Not enough memory
- * throws std::runtime_error: Illegal flags.
- */
-rom_type recognize_platform(unsigned long flags) throw(std::bad_alloc, std::runtime_error);
-
-/**
- * Name a sub-ROM.
- *
- * parameter major: The major type.
- * parameter romnumber: ROM number to name (as returned by recognize_commandline_rom).
- * throws std::bad_alloc: Not enough memory
- */
-std::string name_subrom(enum rom_type major, unsigned romnumber) throw(std::bad_alloc);
-
-/**
- * Get major type and region of loaded ROM.
- *
- * returns: Tuple (ROM type, ROM region) of currently loaded ROM.
- */
-std::pair<enum rom_type, enum rom_region> get_current_rom_info() throw();
-
 /**
  * Take current values of all SRAMs in current system and save their contents.
  *
@@ -461,22 +222,21 @@ std::map<std::string, std::vector<char>> load_sram_commandline(const std::vector
 	throw(std::bad_alloc, std::runtime_error);
 
 /**
- * Read index of ROMs and add ROMs found to content-searchable storage.
+ * Given commandline arguments, load a ROM.
  *
- * parameter filename: The filename of index file.
+ * parameter cmdline: The command line.
+ * returns: The loaded ROM set.
  * throws std::bad_alloc: Not enough memory.
- * throws std::runtime_error: Loading index failed.
+ * throws std::runtime_error: Can't load the ROMset.
  */
-void load_index_file(const std::string& filename) throw(std::bad_alloc, std::runtime_error);
+struct loaded_rom load_rom_from_commandline(std::vector<std::string> cmdline) throw(std::bad_alloc,
+	std::runtime_error);
 
 /**
- * Search all indices, looking for file with specified SHA-256 (specifying hash of "" results "").
+ * Dump listing of regions to graphics system messages.
  *
- * parameter hash: The hash of file.
- * returns: Absolute filename.
  * throws std::bad_alloc: Not enough memory.
- * throws std::runtime_error: Not found.
  */
-std::string lookup_file_by_sha256(const std::string& hash) throw(std::bad_alloc, std::runtime_error);
+void dump_region_map() throw(std::bad_alloc);
 
 #endif
diff --git a/include/interface/core.hpp b/include/interface/core.hpp
index 7e017f9a..49b36c5b 100644
--- a/include/interface/core.hpp
+++ b/include/interface/core.hpp
@@ -10,6 +10,43 @@ std::pair<uint32_t, uint32_t> emucore_get_video_rate(bool interlace = false);
 std::pair<uint32_t, uint32_t> emucore_get_audio_rate();
 void emucore_basic_init();
 
+struct region_info_structure
+{
+	virtual ~region_info_structure();
+	virtual std::string get_iname() = 0;
+	virtual std::string get_hname() = 0;
+	virtual bool compatible(const std::string& movie) = 0;
+};
+
+struct sysregion_info_structure
+{
+	virtual ~sysregion_info_structure();
+	virtual std::string get_iname() = 0;
+	virtual void get_length_magic(uint64_t* magic) = 0;
+};
+
+struct rom_info_structure
+{
+	virtual ~rom_info_structure();
+	virtual std::string get_iname() = 0;
+	virtual std::string get_hname() = 0;
+	virtual bool has_markup() = 0;
+	virtual unsigned mandatory_flags() = 0;
+	virtual size_t headersize(size_t imagesize) = 0;
+};
+
+struct systype_info_structure
+{
+	virtual ~systype_info_structure();
+	virtual std::string get_iname() = 0;
+	virtual std::string get_hname() = 0;
+	virtual size_t region_slots() = 0;
+	virtual struct region_info_structure* region_slot(size_t index) = 0;
+	virtual size_t rom_slots() = 0;
+	virtual struct rom_info_structure* rom_slot(size_t index) = 0;
+	virtual struct sysregion_info_structure* get_sysregion(const std::string& region) = 0;
+};
+
 struct sram_slot_structure
 {
 	virtual ~sram_slot_structure();
@@ -45,6 +82,8 @@ protected:
 	endian rendian;
 };
 
+size_t emucore_systype_slots();
+struct systype_info_structure* emucore_systype_slot(size_t index);
 size_t emucore_sram_slots();
 struct sram_slot_structure* emucore_sram_slot(size_t index);
 size_t emucore_vma_slots();
@@ -52,5 +91,12 @@ struct vma_structure* emucore_vma_slot(size_t index);
 void emucore_refresh_cart();
 std::vector<char> emucore_serialize();
 void emucore_unserialize(const std::vector<char>& data);
+void emucore_load_rom(systype_info_structure* rtype, region_info_structure* region,
+	const std::vector<std::vector<char>>& romslots, const std::vector<std::vector<char>>& markslots);
+struct region_info_structure* emucore_current_region();
+struct region_info_structure* emucore_region_for_sysregion(const std::string& sysregion);
+struct systype_info_structure* emucore_systype_for_sysregion(const std::string& sysregion);
+struct sysregion_info_structure* emucore_sysregion_for_sysregion(const std::string& sysregion);
+void emucore_pre_load_settings();
 
 #endif
diff --git a/src/core/misc.cpp b/src/core/misc.cpp
index 1be96566..73b51ff6 100644
--- a/src/core/misc.cpp
+++ b/src/core/misc.cpp
@@ -94,69 +94,6 @@ void set_random_seed() throw(std::bad_alloc)
 }
 
 
-struct loaded_rom load_rom_from_commandline(std::vector<std::string> cmdline) throw(std::bad_alloc,
-	std::runtime_error)
-{
-	struct rom_files f;
-	try {
-		f = rom_files(cmdline);
-		f.resolve_relative();
-	} catch(std::bad_alloc& e) {
-		OOM_panic();
-	} catch(std::exception& e) {
-		throw std::runtime_error(std::string("Can't resolve ROM files: ") + e.what());
-	}
-	messages << "ROM type: " << gtype::tostring(f.rtype, f.region) << std::endl;
-	if(f.rom != "")		messages << name_subrom(f.rtype, 0) << " file: '" << f.rom << "'" << std::endl;
-	if(f.rom_xml != "")	messages << name_subrom(f.rtype, 1) << " file: '" << f.rom_xml << "'"
-		<< std::endl;
-	if(f.slota != "")	messages << name_subrom(f.rtype, 2) << " file: '" << f.slota << "'" << std::endl;
-	if(f.slota_xml != "")	messages << name_subrom(f.rtype, 3) << " file: '" << f.slota_xml << "'"
-		<< std::endl;
-	if(f.slotb != "")	messages << name_subrom(f.rtype, 4) << " file: '" << f.slotb << "'" << std::endl;
-	if(f.slotb_xml != "")	messages << name_subrom(f.rtype, 5) << " file: '" << f.slotb_xml << "'"
-		<< std::endl;
-
-	struct loaded_rom r;
-	try {
-		r = loaded_rom(f);
-		r.do_patch(cmdline);
-	} catch(std::bad_alloc& e) {
-		OOM_panic();
-	} catch(std::exception& e) {
-		throw std::runtime_error(std::string("Can't load ROM: ") + e.what());
-	}
-
-	std::string not_present = "N/A";
-	if(r.rom.valid)		messages << name_subrom(f.rtype, 0) << " hash: " << r.rom.sha256 << std::endl;
-	if(r.rom_xml.valid)	messages << name_subrom(f.rtype, 1) << " hash: " << r.rom_xml.sha256 << std::endl;
-	if(r.slota.valid)	messages << name_subrom(f.rtype, 2) << " hash: " << r.slota.sha256 << std::endl;
-	if(r.slota_xml.valid)	messages << name_subrom(f.rtype, 3) << " hash: " << r.slota_xml.sha256
-		<< std::endl;
-	if(r.slotb.valid)	messages << name_subrom(f.rtype, 4) << " hash: " << r.slotb.sha256 << std::endl;
-	if(r.slotb_xml.valid)	messages << name_subrom(f.rtype, 5) << " hash: " << r.slotb_xml.sha256
-		<< std::endl;
-	return r;
-}
-
-void dump_region_map() throw(std::bad_alloc)
-{
-	std::vector<vma_structure*> regions = get_regions();
-	for(auto i : regions) {
-		char buf[256];
-		char echar;
-		if(i->get_endian() == vma_structure::E_LITTLE)
-			echar = 'L';
-		if(i->get_endian() == vma_structure::E_BIG)
-			echar = 'B';
-		if(i->get_endian() == vma_structure::E_HOST)
-			echar = 'N';
-		sprintf(buf, "Region: %016X-%016X %016X %s%c %s", i->get_base(), i->get_base() + i->get_size() - 1,
-			i->get_size(), i->is_readonly() ? "R-" : "RW", echar, i->get_name().c_str());
-		messages << buf << std::endl;
-	}
-}
-
 void fatal_error() throw()
 {
 	platform::fatal_error();
diff --git a/src/core/moviedata.cpp b/src/core/moviedata.cpp
index af4594c2..6d010470 100644
--- a/src/core/moviedata.cpp
+++ b/src/core/moviedata.cpp
@@ -1,5 +1,3 @@
-#include "core/bsnes.hpp"
-
 #include "core/command.hpp"
 #include "core/controller.hpp"
 #include "core/dispatch.hpp"
@@ -219,12 +217,12 @@ void do_save_state(const std::string& filename) throw(std::bad_alloc,
 			our_movie.prefix = sanitize_prefix(mprefix.prefix);
 		our_movie.is_savestate = true;
 		our_movie.sram = save_sram();
-		our_movie.rom_sha256 = our_rom->rom.sha256;
-		our_movie.romxml_sha256 = our_rom->rom_xml.sha256;
-		our_movie.slota_sha256 = our_rom->slota.sha256;
-		our_movie.slotaxml_sha256 = our_rom->slota_xml.sha256;
-		our_movie.slotb_sha256 = our_rom->slotb.sha256;
-		our_movie.slotbxml_sha256 = our_rom->slotb_xml.sha256;
+		our_movie.main_checksums.resize(our_rom->main_slots.size());
+		our_movie.markup_checksums.resize(our_rom->markup_slots.size());
+		for(size_t i = 0; i < our_movie.main_checksums.size(); i++)
+			our_movie.main_checksums[i] = our_rom->main_slots[i].sha256;
+		for(size_t i = 0; i < our_movie.markup_checksums.size(); i++)
+			our_movie.markup_checksums[i] = our_rom->markup_slots[i].sha256;
 		our_movie.savestate = emucore_serialize();
 		get_framebuffer().save(our_movie.screenshot);
 		movb.get_movie().save_state(our_movie.projectid, our_movie.save_frame, our_movie.lagged_frames,
@@ -271,8 +269,7 @@ extern time_t random_seed_value;
 
 void do_load_beginning() throw(std::bad_alloc, std::runtime_error)
 {
-	SNES::config.random = false;
-	SNES::config.expansion_port = SNES::System::ExpansionPortDevice::None;
+	emucore_pre_load_settings();
 
 	//Negative return.
 	rrdata::add_internal();
@@ -305,13 +302,15 @@ void do_load_state(struct moviefile& _movie, int lmode)
 	if(_movie.force_corrupt)
 		throw std::runtime_error("Movie file invalid");
 	bool will_load_state = _movie.is_savestate && lmode != LOAD_STATE_MOVIE;
-	if(gtype::toromtype(_movie.gametype) != our_rom->rtype) {
+	systype_info_structure* systype = emucore_systype_for_sysregion(_movie.gametype);
+	region_info_structure* region = emucore_region_for_sysregion(_movie.gametype);
+	if(systype != our_rom->rtype) {
 		messages << "_movie.gametype = " << _movie.gametype << std::endl;
-		messages << "gtype::toromtype(_movie.gametype) = " << gtype::toromtype(_movie.gametype) << std::endl;
-		messages << "our_rom->rtype = " << our_rom->rtype << std::endl;
+		messages << "our_rom->rtype = " << our_rom->rtype->get_iname() << std::endl;
 		throw std::runtime_error("ROM types of movie and loaded ROM don't match");
 	}
-	if(gtype::toromregion(_movie.gametype) != our_rom->orig_region && our_rom->orig_region != REGION_AUTO)
+
+	if(!our_rom->orig_region->compatible(region->get_iname()))
 		throw std::runtime_error("NTSC/PAL select of movie and loaded ROM don't match");
 
 	if(_movie.coreversion != emucore_get_version()) {
@@ -327,17 +326,24 @@ void do_load_state(struct moviefile& _movie, int lmode)
 				<< "\tFile is from: " << _movie.coreversion << std::endl;
 	}
 	bool rom_ok = true;
-	rom_ok = rom_ok & warn_hash_mismatch(_movie.rom_sha256, our_rom->rom, "ROM #1", will_load_state);
-	rom_ok = rom_ok & warn_hash_mismatch(_movie.romxml_sha256, our_rom->rom_xml, "XML #1", will_load_state);
-	rom_ok = rom_ok & warn_hash_mismatch(_movie.slota_sha256, our_rom->slota, "ROM #2", will_load_state);
-	rom_ok = rom_ok & warn_hash_mismatch(_movie.slotaxml_sha256, our_rom->slota_xml, "XML #2", will_load_state);
-	rom_ok = rom_ok & warn_hash_mismatch(_movie.slotb_sha256, our_rom->slotb, "ROM #3", will_load_state);
-	rom_ok = rom_ok & warn_hash_mismatch(_movie.slotbxml_sha256, our_rom->slotb_xml, "XML #3", will_load_state);
+	for(size_t i = 0; i < our_rom->rtype->rom_slots(); i++) {
+		if(_movie.main_checksums.size() > i)
+			rom_ok = rom_ok & warn_hash_mismatch(_movie.main_checksums[i], our_rom->main_slots[i],
+				our_rom->rtype->rom_slot(i)->get_hname(), will_load_state);
+		else
+			rom_ok = rom_ok & warn_hash_mismatch("", our_rom->main_slots[i],
+				our_rom->rtype->rom_slot(i)->get_hname(), will_load_state);
+		if(_movie.markup_checksums.size() > i)
+			rom_ok = rom_ok & warn_hash_mismatch(_movie.markup_checksums[i], our_rom->markup_slots[i],
+				our_rom->rtype->rom_slot(i)->get_hname() + " markup", will_load_state);
+		else
+			rom_ok = rom_ok & warn_hash_mismatch("", our_rom->markup_slots[i],
+				our_rom->rtype->rom_slot(i)->get_hname() + " markup", will_load_state);
+	}
 	if(!rom_ok)
 		throw std::runtime_error("Incorrect ROM");
 
-	SNES::config.random = false;
-	SNES::config.expansion_port = SNES::System::ExpansionPortDevice::None;
+	emucore_pre_load_settings();
 
 	movie newmovie;
 	if(lmode == LOAD_STATE_PRESERVE)
@@ -354,7 +360,7 @@ void do_load_state(struct moviefile& _movie, int lmode)
 	rrdata::read(_movie.c_rrdata);
 	rrdata::add_internal();
 	try {
-		our_rom->region = gtype::toromregion(_movie.gametype);
+		our_rom->region = region;
 		random_seed_value = _movie.rtc_second;
 		our_rom->load();
 
@@ -407,39 +413,7 @@ void do_load_state(struct moviefile& _movie, int lmode)
 	if(lmode == LOAD_STATE_CURRENT && !current_mode)
 		movb.get_movie().readonly_mode(false);
 	information_dispatch::do_mode_change(movb.get_movie().readonly_mode());
-	messages << "ROM Type ";
-	switch(our_rom->rtype) {
-	case ROMTYPE_SNES:
-		messages << "SNES";
-		break;
-	case ROMTYPE_BSX:
-		messages << "BS-X";
-		break;
-	case ROMTYPE_BSXSLOTTED:
-		messages << "BS-X slotted";
-		break;
-	case ROMTYPE_SUFAMITURBO:
-		messages << "Sufami Turbo";
-		break;
-	case ROMTYPE_SGB:
-		messages << "Super Game Boy";
-		break;
-	default:
-		messages << "Unknown";
-		break;
-	}
-	messages << " region ";
-	switch(our_rom->region) {
-	case REGION_PAL:
-		messages << "PAL";
-		break;
-	case REGION_NTSC:
-		messages << "NTSC";
-		break;
-	default:
-		messages << "Unknown";
-		break;
-	}
+	messages << "ROM Type " << our_rom->rtype->get_hname() << " region " << our_rom->region->get_hname();
 	messages << std::endl;
 	uint64_t mlength = _movie.get_movie_length();
 	{
diff --git a/src/core/moviefile.cpp b/src/core/moviefile.cpp
index 620f9f40..ad4bb79c 100644
--- a/src/core/moviefile.cpp
+++ b/src/core/moviefile.cpp
@@ -296,7 +296,7 @@ porttype_t parse_controller_type(const std::string& type, bool port) throw(std::
 moviefile::moviefile() throw(std::bad_alloc)
 {
 	force_corrupt = false;
-	gametype = GT_INVALID;
+	gametype = "";
 	port1 = PT_INVALID;
 	port2 = PT_INVALID;
 	coreversion = "";
@@ -305,6 +305,8 @@ moviefile::moviefile() throw(std::bad_alloc)
 	is_savestate = false;
 	movie_rtc_second = rtc_second = DEFAULT_RTC_SECOND;
 	movie_rtc_subsecond = rtc_subsecond = DEFAULT_RTC_SUBSECOND;
+	main_checksums.resize(27);
+	markup_checksums.resize(27);
 }
 
 moviefile::moviefile(const std::string& movie) throw(std::bad_alloc, std::runtime_error)
@@ -319,14 +321,7 @@ moviefile::moviefile(const std::string& movie) throw(std::bad_alloc, std::runtim
 	read_linefile(r, "controlsversion", tmp);
 	if(tmp != "0")
 		throw std::runtime_error("Can't decode movie data");
-	read_linefile(r, "gametype", tmp);
-	try {
-		gametype = gtype::togametype(tmp);
-	} catch(std::bad_alloc& e) {
-		throw;
-	} catch(std::exception& e) {
-		throw std::runtime_error("Illegal game type '" + tmp + "'");
-	}
+	read_linefile(r, "gametype", gametype);
 	tmp = "gamepad";
 	read_linefile(r, "port1", tmp, true);
 	port1 = porttype_info::lookup(tmp).value;
@@ -338,12 +333,16 @@ moviefile::moviefile(const std::string& movie) throw(std::bad_alloc, std::runtim
 	read_linefile(r, "projectid", projectid);
 	rerecords = read_rrdata(r, c_rrdata);
 	read_linefile(r, "coreversion", coreversion);
-	read_linefile(r, "rom.sha256", rom_sha256, true);
-	read_linefile(r, "romxml.sha256", romxml_sha256, true);
-	read_linefile(r, "slota.sha256", slota_sha256, true);
-	read_linefile(r, "slotaxml.sha256", slotaxml_sha256, true);
-	read_linefile(r, "slotb.sha256", slotb_sha256, true);
-	read_linefile(r, "slotbxml.sha256", slotbxml_sha256, true);
+	main_checksums.resize(27);
+	markup_checksums.resize(27);
+	read_linefile(r, "rom.sha256", main_checksums[0], true);
+	read_linefile(r, "romxml.sha256", markup_checksums[0], true);
+	for(size_t i = 0; i < 26; i++) {
+		read_linefile(r, (stringfmt() << "slot" << static_cast<char>('a' + i) << ".sha256").str(),
+			      main_checksums[i + 1], true);
+		read_linefile(r, (stringfmt() << "slot" << static_cast<char>('a' + i) << "xml.sha256").str(),
+			      markup_checksums[i + 1], true);
+	}
 	read_linefile(r, "prefix", prefix, true);
 	prefix = sanitize_prefix(prefix);
 	movie_rtc_second = DEFAULT_RTC_SECOND;
@@ -386,7 +385,7 @@ moviefile::moviefile(const std::string& movie) throw(std::bad_alloc, std::runtim
 void moviefile::save(const std::string& movie, unsigned compression) throw(std::bad_alloc, std::runtime_error)
 {
 	zip_writer w(movie, compression);
-	write_linefile(w, "gametype", gtype::tostring(gametype));
+	write_linefile(w, "gametype", gametype);
 	if(port1 != PT_GAMEPAD)
 		write_linefile(w, "port1", porttype_info::lookup(port1).name);
 	if(port2 != PT_NONE)
@@ -398,12 +397,14 @@ void moviefile::save(const std::string& movie, unsigned compression) throw(std::
 	write_linefile(w, "coreversion", coreversion);
 	write_linefile(w, "projectid", projectid);
 	write_rrdata(w);
-	write_linefile(w, "rom.sha256", rom_sha256, true);
-	write_linefile(w, "romxml.sha256", romxml_sha256, true);
-	write_linefile(w, "slota.sha256", slota_sha256, true);
-	write_linefile(w, "slotaxml.sha256", slotaxml_sha256, true);
-	write_linefile(w, "slotb.sha256", slotb_sha256, true);
-	write_linefile(w, "slotbxml.sha256", slotbxml_sha256, true);
+	write_linefile(w, "rom.sha256", main_checksums[0], true);
+	write_linefile(w, "romxml.sha256", markup_checksums[0], true);
+	for(size_t i = 0; i < 26; i++) {
+		write_linefile(w, (stringfmt() << "slot" << static_cast<char>('a' + i) << ".sha256").str(),
+			      main_checksums[i + 1], true);
+		write_linefile(w, (stringfmt() << "slot" << static_cast<char>('a' + i) << "xml.sha256").str(),
+			      markup_checksums[i + 1], true);
+	}
 	write_linefile(w, "prefix", prefix, true);
 	for(auto i : movie_sram)
 		write_raw_file(w, "moviesram." + i.first, i.second);
@@ -438,11 +439,6 @@ namespace
 	const int BLOCK_FRAMES = 1;
 	const int STEP_W = 2;
 	const int STEP_N = 3;
-
-	uint64_t magic[2][4] = {
-		{178683, 10738636, 16639264, 596096},
-		{6448, 322445, 19997208, 266440}
-	};
 }
 
 uint64_t moviefile::get_movie_length(uint64_t framebias) throw()
@@ -452,62 +448,14 @@ uint64_t moviefile::get_movie_length(uint64_t framebias) throw()
 		frames -= framebias;
 	else
 		frames = 0;
-	uint64_t* _magic = magic[(gametype == GT_SNES_PAL || gametype == GT_SGB_PAL) ? 1 : 0];
+	uint64_t _magic[4];
+	emucore_sysregion_for_sysregion(gametype)->get_length_magic(_magic);
 	uint64_t t = _magic[BLOCK_SECONDS] * 1000000000ULL * (frames / _magic[BLOCK_FRAMES]);
 	frames %= _magic[BLOCK_FRAMES];
 	t += frames * _magic[STEP_W] + (frames * _magic[STEP_N] / _magic[BLOCK_FRAMES]);
 	return t;
 }
 
-gametype_t gametype_compose(rom_type type, rom_region region)
-{
-	switch(type) {
-	case ROMTYPE_SNES:
-		return (region == REGION_PAL) ? GT_SNES_PAL : GT_SNES_NTSC;
-	case ROMTYPE_BSX:
-		return GT_BSX;
-	case ROMTYPE_BSXSLOTTED:
-		return GT_BSX_SLOTTED;
-	case ROMTYPE_SUFAMITURBO:
-		return GT_SUFAMITURBO;
-	case ROMTYPE_SGB:
-		return (region == REGION_PAL) ? GT_SGB_PAL : GT_SGB_NTSC;
-	default:
-		return GT_INVALID;
-	}
-}
-
-rom_region gametype_region(gametype_t type)
-{
-	switch(type) {
-	case GT_SGB_PAL:
-	case GT_SNES_PAL:
-		return REGION_PAL;
-	default:
-		return REGION_NTSC;
-	}
-}
-
-rom_type gametype_romtype(gametype_t type)
-{
-	switch(type) {
-	case GT_SNES_NTSC:
-	case GT_SNES_PAL:
-		return ROMTYPE_SNES;
-	case GT_BSX:
-		return ROMTYPE_BSX;
-	case GT_BSX_SLOTTED:
-		return ROMTYPE_BSXSLOTTED;
-	case GT_SUFAMITURBO:
-		return ROMTYPE_SUFAMITURBO;
-	case GT_SGB_PAL:
-	case GT_SGB_NTSC:
-		return ROMTYPE_SGB;
-	default:
-		return ROMTYPE_NONE;
-	};
-}
-
 std::string sanitize_prefix(const std::string& in) throw(std::bad_alloc)
 {
 	std::ostringstream s;
@@ -523,3 +471,12 @@ std::string sanitize_prefix(const std::string& in) throw(std::bad_alloc)
 	}
 	return s.str();
 }
+
+void copy_romdata_to_movie(struct moviefile& movie, const struct loaded_rom& r)
+{
+	movie.gametype = r.rtype->get_sysregion(r.region->get_iname())->get_iname();
+	for(size_t i = 0; i < r.rtype->rom_slots() && i < 27; i++)
+		movie.main_checksums[i] = r.main_slots[i].sha256;
+	for(size_t i = 0; i < r.rtype->rom_slots() && i < 27; i++)
+		movie.markup_checksums[i] = r.markup_slots[i].sha256;
+}
diff --git a/src/core/render.cpp b/src/core/render.cpp
index 9a26d596..3558e49d 100644
--- a/src/core/render.cpp
+++ b/src/core/render.cpp
@@ -1,5 +1,4 @@
 #include "lsnes.hpp"
-#include <snes/snes.hpp>
 
 #include "core/misc.hpp"
 #include "core/png.hpp"
@@ -7,6 +6,8 @@
 
 #include <sstream>
 #include <list>
+#include <cstring>
+#include <cmath>
 #include <iomanip>
 #include <cstdint>
 #include <string>
diff --git a/src/core/rom.cpp b/src/core/rom.cpp
index f59afcd5..38b15b16 100644
--- a/src/core/rom.cpp
+++ b/src/core/rom.cpp
@@ -1,5 +1,3 @@
-#include "core/bsnes.hpp"
-
 #include "core/command.hpp"
 #include "core/dispatch.hpp"
 #include "core/framerate.hpp"
@@ -27,167 +25,7 @@
 #include <boost/iostreams/filtering_stream.hpp>
 #include <boost/iostreams/device/back_inserter.hpp>
 
-//Some anti-typo defs.
-#define SNES_TYPE "snes"
-#define SNES_PAL "snes_pal"
-#define SNES_NTSC "snes_ntsc"
-#define BSX "bsx"
-#define BSXSLOTTED "bsxslotted"
-#define SUFAMITURBO "sufamiturbo"
-#define SGB_TYPE "SGB"
-#define SGB_PAL "sgb_pal"
-#define SGB_NTSC "sgb_ntsc"
 
-std::string gtype::tostring(rom_type rtype, rom_region region) throw(std::bad_alloc, std::runtime_error)
-{
-	switch(rtype) {
-	case ROMTYPE_SNES:
-		switch(region) {
-		case REGION_AUTO:	return "snes";
-		case REGION_NTSC:	return "snes_ntsc";
-		case REGION_PAL:	return "snes_pal";
-		};
-	case ROMTYPE_SGB:
-		switch(region) {
-		case REGION_AUTO:	return "sgb";
-		case REGION_NTSC:	return "sgb_ntsc";
-		case REGION_PAL:	return "sgb_pal";
-		};
-	case ROMTYPE_BSX:		return "bsx";
-	case ROMTYPE_BSXSLOTTED:	return "bsxslotted";
-	case ROMTYPE_SUFAMITURBO:	return "sufamiturbo";
-	default:			throw std::runtime_error("tostring: ROMTYPE_NONE");
-	};
-}
-
-std::string gtype::tostring(gametype_t gametype) throw(std::bad_alloc, std::runtime_error)
-{
-	switch(gametype) {
-	case GT_SNES_NTSC:		return "snes_ntsc";
-	case GT_SNES_PAL:		return "snes_pal";
-	case GT_SGB_NTSC:		return "sgb_ntsc";
-	case GT_SGB_PAL:		return "sgb_pal";
-	case GT_BSX:			return "bsx";
-	case GT_BSX_SLOTTED:		return "bsxslotted";
-	case GT_SUFAMITURBO:		return "sufamiturbo";
-	default:			throw std::runtime_error("tostring: GT_INVALID");
-	};
-}
-
-gametype_t gtype::togametype(rom_type rtype, rom_region region) throw(std::bad_alloc, std::runtime_error)
-{
-	switch(rtype) {
-	case ROMTYPE_SNES:
-		switch(region) {
-		case REGION_AUTO:	return GT_SGB_NTSC;
-		case REGION_NTSC:	return GT_SNES_NTSC;
-		case REGION_PAL:	return GT_SNES_PAL;
-		};
-	case ROMTYPE_SGB:
-		switch(region) {
-		case REGION_AUTO:	return GT_SGB_NTSC;
-		case REGION_NTSC:	return GT_SGB_NTSC;
-		case REGION_PAL:	return GT_SGB_PAL;
-		};
-	case ROMTYPE_BSX:		return GT_BSX;
-	case ROMTYPE_BSXSLOTTED:	return GT_BSX_SLOTTED;
-	case ROMTYPE_SUFAMITURBO:	return GT_SUFAMITURBO;
-	default:			throw std::runtime_error("togametype: ROMTYPE_NONE");
-	};
-}
-
-gametype_t gtype::togametype(const std::string& gametype) throw(std::bad_alloc, std::runtime_error)
-{
-	if(gametype == "snes_ntsc")
-		return GT_SNES_NTSC;
-	if(gametype == "snes_pal")
-		return GT_SNES_PAL;
-	if(gametype == "sgb_ntsc")
-		return GT_SGB_NTSC;
-	if(gametype == "sgb_pal")
-		return GT_SGB_PAL;
-	if(gametype == "bsx")
-		return GT_BSX;
-	if(gametype == "bsxslotted")
-		return GT_BSX_SLOTTED;
-	if(gametype == "sufamiturbo")
-		return GT_SUFAMITURBO;
-	throw std::runtime_error("Unknown game type '" + gametype + "'");
-}
-
-rom_type gtype::toromtype(const std::string& gametype) throw(std::bad_alloc, std::runtime_error)
-{
-	if(gametype == "snes_ntsc")
-		return ROMTYPE_SNES;
-	if(gametype == "snes_pal")
-		return ROMTYPE_SNES;
-	if(gametype == "snes")
-		return ROMTYPE_SNES;
-	if(gametype == "sgb_ntsc")
-		return ROMTYPE_SGB;
-	if(gametype == "sgb_pal")
-		return ROMTYPE_SGB;
-	if(gametype == "sgb")
-		return ROMTYPE_SGB;
-	if(gametype == "bsx")
-		return ROMTYPE_BSX;
-	if(gametype == "bsxslotted")
-		return ROMTYPE_BSXSLOTTED;
-	if(gametype == "sufamiturbo")
-		return ROMTYPE_SUFAMITURBO;
-	throw std::runtime_error("Unknown game type '" + gametype + "'");
-}
-
-rom_type gtype::toromtype(gametype_t gametype) throw()
-{
-	switch(gametype) {
-	case GT_SNES_NTSC:		return ROMTYPE_SNES;
-	case GT_SNES_PAL:		return ROMTYPE_SNES;
-	case GT_SGB_NTSC:		return ROMTYPE_SGB;
-	case GT_SGB_PAL:		return ROMTYPE_SGB;
-	case GT_BSX:			return ROMTYPE_BSX;
-	case GT_BSX_SLOTTED:		return ROMTYPE_BSXSLOTTED;
-	case GT_SUFAMITURBO:		return ROMTYPE_SUFAMITURBO;
-	case GT_INVALID:		throw std::runtime_error("toromtype: GT_INVALID");
-	};
-}
-
-rom_region gtype::toromregion(const std::string& gametype) throw(std::bad_alloc, std::runtime_error)
-{
-	if(gametype == "snes_ntsc")
-		return REGION_NTSC;
-	if(gametype == "snes_pal")
-		return REGION_PAL;
-	if(gametype == "snes")
-		return REGION_AUTO;
-	if(gametype == "sgb_ntsc")
-		return REGION_NTSC;
-	if(gametype == "sgb_pal")
-		return REGION_PAL;
-	if(gametype == "sgb")
-		return REGION_AUTO;
-	if(gametype == "bsx")
-		return REGION_NTSC;
-	if(gametype == "bsxslotted")
-		return REGION_NTSC;
-	if(gametype == "sufamiturbo")
-		return REGION_NTSC;
-	throw std::runtime_error("Unknown game type '" + gametype + "'");
-}
-
-rom_region gtype::toromregion(gametype_t gametype) throw()
-{
-	switch(gametype) {
-	case GT_SNES_NTSC:		return REGION_NTSC;
-	case GT_SNES_PAL:		return REGION_PAL;
-	case GT_SGB_NTSC:		return REGION_NTSC;
-	case GT_SGB_PAL:		return REGION_PAL;
-	case GT_BSX:			return REGION_NTSC;
-	case GT_BSX_SLOTTED:		return REGION_NTSC;
-	case GT_SUFAMITURBO:		return REGION_NTSC;
-	case GT_INVALID:		throw std::runtime_error("toromregion: GT_INVALID");
-	};
-}
 
 
 namespace
@@ -200,14 +38,6 @@ namespace
 		return false;
 	}
 
-	const char* romtypes_to_recognize[] = {
-		"rom", "bsx", "bsxslotted", "dmg", "slot-a", "slot-b",
-		"rom-xml", "bsx-xml", "bsxslotted-xml", "dmg-xml", "slot-a-xml", "slot-b-xml"
-	};
-
-	enum rom_type current_rom_type = ROMTYPE_NONE;
-	enum rom_region current_region = REGION_NTSC;
-
 	std::string findoption(const std::vector<std::string>& cmdline, const std::string& option)
 	{
 		std::string value;
@@ -232,10 +62,10 @@ loaded_slot::loaded_slot() throw(std::bad_alloc)
 	valid = false;
 }
 
-loaded_slot::loaded_slot(const std::string& filename, const std::string& base, bool xml_flag)
-	throw(std::bad_alloc, std::runtime_error)
+loaded_slot::loaded_slot(const std::string& filename, const std::string& base, struct rom_info_structure& slot,
+	bool xml_flag) throw(std::bad_alloc, std::runtime_error)
 {
-	bool headered = false;
+	size_t headered = 0;
 	xml = xml_flag;
 	if(filename == "") {
 		valid = false;
@@ -243,16 +73,15 @@ loaded_slot::loaded_slot(const std::string& filename, const std::string& base, b
 	}
 	valid = true;
 	data = read_file_relative(filename, base);
-	if(!xml && data.size() % 1024 == 512)
+	if(!xml)
 		//Assume headered.
-		headered = true;
-	if(headered && !xml) {
-		if(data.size() >= 512) {
-			memmove(&data[0], &data[512], data.size() - 512);
-			data.resize(data.size() - 512);
-		} else {
+		headered = slot.headersize(data.size());
+	if(headered) {
+		if(data.size() >= headered) {
+			memmove(&data[0], &data[headered], data.size() - headered);
+			data.resize(data.size() - headered);
+		} else
 			data.resize(0);
-		}
 	}
 	sha256 = sha256::hash(data);
 	if(xml) {
@@ -287,169 +116,124 @@ void loaded_slot::patch(const std::vector<char>& patch, int32_t offset) throw(st
 
 rom_files::rom_files() throw()
 {
-	rtype = ROMTYPE_NONE;
-	region = REGION_AUTO;
-
-}
-
-rom_files::rom_files(const std::vector<std::string>& cmdline) throw(std::bad_alloc, std::runtime_error)
-{
-	rom = rom_xml = slota = slota_xml = slotb = slotb_xml = "";
-	std::string arr[sizeof(romtypes_to_recognize) / sizeof(romtypes_to_recognize[0])];
-	unsigned long flags = 0;
-	for(size_t i = 0; i < sizeof(romtypes_to_recognize) / sizeof(romtypes_to_recognize[0]); i++) {
-		arr[i] = findoption(cmdline, romtypes_to_recognize[i]);
-		if(arr[i] != "")
-			flags |= (1L << i);
-	}
-	rtype = recognize_platform(flags);
-	for(size_t i = 0; i < sizeof(romtypes_to_recognize) / sizeof(romtypes_to_recognize[0]); i++) {
-		if(arr[i] != "")
-			switch(recognize_commandline_rom(rtype, romtypes_to_recognize[i])) {
-			case 0:		rom = arr[i];		break;
-			case 1:		rom_xml = arr[i];	break;
-			case 2:		slota = arr[i];		break;
-			case 3:		slota_xml = arr[i];	break;
-			case 4:		slotb = arr[i];		break;
-			case 5:		slotb_xml = arr[i];	break;
-			};
-	}
-	region = (rtype == ROMTYPE_SGB || rtype == ROMTYPE_SNES) ? REGION_AUTO : REGION_NTSC;
-	if(option_set(cmdline, "--ntsc"))
-		region = REGION_NTSC;
-	else if(option_set(cmdline, "--pal"))
-		region = REGION_PAL;
-
-	base_file = "";
+	rtype = NULL;
+	region = NULL;
 }
 
 void rom_files::resolve_relative() throw(std::bad_alloc, std::runtime_error)
 {
-	rom = resolve_file_relative(rom, base_file);
-	rom_xml = resolve_file_relative(rom_xml, base_file);
-	slota = resolve_file_relative(slota, base_file);
-	slota_xml = resolve_file_relative(slota_xml, base_file);
-	slotb = resolve_file_relative(slotb, base_file);
-	slotb_xml = resolve_file_relative(slotb_xml, base_file);
+	for(auto& i : main_slots)
+		i = resolve_file_relative(i, base_file);
+	for(auto& i : markup_slots)
+		i = resolve_file_relative(i, base_file);
+	base_file = "";
+}
+
+rom_files::rom_files(const std::vector<std::string>& cmdline) throw(std::bad_alloc, std::runtime_error)
+{
+	std::string systype = findoption(cmdline, "system");
+	if(systype == "")
+		throw std::runtime_error("System type (--system=<sys>) must be given");
+	for(size_t i = 0; i < emucore_systype_slots(); i++) {
+		auto j = emucore_systype_slot(i);
+		if(j->get_iname() == systype) {
+			rtype = j;
+			break;
+		}
+	}
+	if(!rtype)
+		throw std::runtime_error("Unrecognized system type '" + systype + "'");
+
+	std::string _region = findoption(cmdline, "region");
+	if(_region == "")
+		//Default.
+		region = rtype->region_slot(0);
+	else {
+		for(size_t i = 0; i < rtype->region_slots(); i++) {
+			auto j = rtype->region_slot(i);
+			if(j->get_iname() == _region) {
+				region = j;
+				break;
+			}
+		}
+	}
+	if(!region)
+		throw std::runtime_error("Unrecognized region '" + _region + "'");
+
+	main_slots.resize(rtype->rom_slots());
+	markup_slots.resize(rtype->rom_slots());
+
+	unsigned complete = 0;
+	unsigned flags = 0;
+	for(size_t i = 0; i < rtype->rom_slots(); i++) {
+		auto j = rtype->rom_slot(i);
+		complete |= j->mandatory_flags();
+		std::string f = findoption(cmdline, j->get_iname());
+		if(f != "") {
+			flags |= j->mandatory_flags();
+			main_slots[i] = f;
+		}
+		f = findoption(cmdline, j->get_iname() + "-xml");
+		if(f != "") {
+			if(!j->has_markup())
+				throw std::runtime_error("ROM type '" + j->get_iname() + "' does not have markup");
+			markup_slots[i] = f;
+		}
+	}
+	if(complete != flags)
+		(stringfmt() << "Required ROM image missing (flags=" << flags << ", expected=" << complete << ")").
+			throwex();
 	base_file = "";
 }
 
 
-std::pair<enum rom_type, enum rom_region> get_current_rom_info() throw()
-{
-	return std::make_pair(current_rom_type, current_region);
-}
-
 loaded_rom::loaded_rom() throw()
 {
-	rtype = ROMTYPE_NONE;
-	region = orig_region = REGION_AUTO;
+	rtype = NULL;
+	region = orig_region = NULL;
 }
 
 loaded_rom::loaded_rom(const rom_files& files) throw(std::bad_alloc, std::runtime_error)
 {
-	std::string _slota = files.slota;
-	std::string _slota_xml = files.slota_xml;
-	std::string _slotb = files.slotb;
-	std::string _slotb_xml = files.slotb_xml;
-	if(files.rtype == ROMTYPE_NONE) {
-		rtype = ROMTYPE_NONE;
-		region = orig_region = files.region;
+	if(files.rtype == NULL) {
+		rtype = NULL;
+		region = orig_region = NULL;
 		return;
 	}
-	if((_slota != "" || _slota_xml != "") && files.rtype == ROMTYPE_SNES) {
-		messages << "WARNING: SNES takes only 1 ROM image" << std::endl;
-		_slota = "";
-		_slota_xml = "";
-	}
-	if((_slotb != "" || _slotb_xml != "") && files.rtype != ROMTYPE_SUFAMITURBO) {
-		messages << "WARNING: Only Sufami Turbo takes 3 ROM images" << std::endl;
-		_slotb = "";
-		_slotb_xml = "";
-	}
-	if(files.rom_xml != "" && files.rom == "")
-		messages << "WARNING: " << name_subrom(files.rtype, 0) << " specified without corresponding "
-			<< name_subrom(files.rtype, 1) << std::endl;
-	if(_slota_xml != "" && _slota == "")
-		messages << "WARNING: " << name_subrom(files.rtype, 2) << " specified without corresponding "
-			<< name_subrom(files.rtype, 3) << std::endl;
-	if(_slotb_xml != "" && _slotb == "")
-		messages << "WARNING: " << name_subrom(files.rtype, 4) << " specified without corresponding "
-			<< name_subrom(files.rtype, 5) << std::endl;
-
+	main_slots.resize(files.main_slots.size());
+	markup_slots.resize(files.markup_slots.size());
 	rtype = files.rtype;
-	rom = loaded_slot(files.rom, files.base_file, false);
-	rom_xml = loaded_slot(files.rom_xml, files.base_file, true);
-	slota = loaded_slot(_slota, files.base_file, false);
-	slota_xml = loaded_slot(_slota_xml, files.base_file, true);
-	slotb = loaded_slot(_slotb, files.base_file, false);
-	slotb_xml = loaded_slot(_slotb_xml, files.base_file, true);
+	for(size_t i = 0; i < main_slots.size(); i++)
+		main_slots[i] = loaded_slot(files.main_slots[i], files.base_file, *rtype->rom_slot(i), false);
+	for(size_t i = 0; i < markup_slots.size(); i++)
+		if(rtype->rom_slot(i)->has_markup())
+			markup_slots[i] = loaded_slot(files.markup_slots[i], files.base_file, *rtype->rom_slot(i),
+				true);
 	orig_region = region = files.region;
 }
 
 void loaded_rom::load() throw(std::bad_alloc, std::runtime_error)
 {
-	current_rom_type = ROMTYPE_NONE;
-	if(region == REGION_AUTO && orig_region != REGION_AUTO)
-		region = orig_region;
-	if(region != orig_region && orig_region != REGION_AUTO)
-		throw std::runtime_error("Trying to force incompatible region");
-	if(rtype == ROMTYPE_NONE)
+	if(!rtype)
 		throw std::runtime_error("Can't insert cartridge of type NONE!");
-	switch(region) {
-	case REGION_AUTO:
-		SNES::config.region = SNES::System::Region::Autodetect;
-		break;
-	case REGION_NTSC:
-		SNES::config.region = SNES::System::Region::NTSC;
-		break;
-	case REGION_PAL:
-		SNES::config.region = SNES::System::Region::PAL;
-		break;
-	default:
-		throw std::runtime_error("Trying to force unknown region");
-	}
-	switch(rtype) {
-	case ROMTYPE_SNES:
-		if(!snes_load_cartridge_normal(rom_xml, rom, rom))
-			throw std::runtime_error("Can't load cartridge ROM");
-		break;
-	case ROMTYPE_BSX:
-		if(region == REGION_PAL)
-			throw std::runtime_error("BSX can't be PAL");
-		if(!snes_load_cartridge_bsx(rom_xml, rom, rom, slota_xml, slota, slota))
-			throw std::runtime_error("Can't load cartridge ROM");
-		break;
-	case ROMTYPE_BSXSLOTTED:
-		if(region == REGION_PAL)
-			throw std::runtime_error("Slotted BSX can't be PAL");
-		if(!snes_load_cartridge_bsx_slotted(rom_xml, rom, rom, slota_xml, slota, slota))
-			throw std::runtime_error("Can't load cartridge ROM");
-		break;
-	case ROMTYPE_SGB:
-		if(!snes_load_cartridge_super_game_boy(rom_xml, rom, rom, slota_xml, slota, slota))
-			throw std::runtime_error("Can't load cartridge ROM");
-		break;
-	case ROMTYPE_SUFAMITURBO:
-		if(region == REGION_PAL)
-			throw std::runtime_error("Sufami Turbo can't be PAL");
-		if(!snes_load_cartridge_sufami_turbo(rom_xml, rom, rom, slota_xml, slota, slota, slotb_xml, slotb,
-			slotb))
-			throw std::runtime_error("Can't load cartridge ROM");
-		break;
-	default:
-		throw std::runtime_error("Unknown cartridge type");
-	}
-	if(region == REGION_AUTO)
-		region = snes_get_region() ? REGION_PAL : REGION_NTSC;
-	snes_power();
+	if(!orig_region->compatible(region->get_iname()))
+		throw std::runtime_error("Trying to force incompatible region");
+
+	std::vector<std::vector<char>> romslots;
+	std::vector<std::vector<char>> markslots;
+	romslots.resize(main_slots.size());
+	markslots.resize(markup_slots.size());
+	for(size_t i = 0; i < romslots.size(); i++)
+		romslots[i] = main_slots[i].data;
+	for(size_t i = 0; i < markslots.size(); i++)
+		markslots[i] = markup_slots[i].data;
+	emucore_load_rom(rtype, region, romslots, markslots);
+
+	region = emucore_current_region();
 	auto framerate = emucore_get_video_rate();
 	auto soundrate = emucore_get_audio_rate();
 	set_nominal_framerate(1.0 * framerate.first / framerate.second);
 	information_dispatch::do_sound_rate(soundrate.first, soundrate.second);
-	current_rom_type = rtype;
-	current_region = region;
-	emucore_refresh_cart();
 	refresh_cart_mappings();
 }
 
@@ -477,16 +261,20 @@ void loaded_rom::do_patch(const std::vector<std::string>& cmdline) throw(std::ba
 				throw std::runtime_error("Can't read IPS '" + opt[2] + "': " + e.what());
 			}
 			try {
-				switch(recognize_commandline_rom(rtype, opt[1])) {
-				case 0:		rom.patch(ips, offset);			break;
-				case 1:		rom_xml.patch(ips, offset);		break;
-				case 2:		slota.patch(ips, offset);		break;
-				case 3:		slota_xml.patch(ips, offset);		break;
-				case 4:		slotb.patch(ips, offset);		break;
-				case 5:		slotb_xml.patch(ips, offset);		break;
-				default:
+				bool found = false;
+				for(size_t j = 0; j < rtype->rom_slots(); j++)
+					if(opt[1] == rtype->rom_slot(j)->get_iname()) {
+						main_slots[j].patch(ips, offset);
+						found = true;
+						break;
+					} else if(opt[1] == rtype->rom_slot(j)->get_iname() + "-xml" &&
+						rtype->rom_slot(j)->has_markup()) {
+						markup_slots[j].patch(ips, offset);
+						found = true;
+						break;
+					}
+				if(!found)
 					throw std::runtime_error("Invalid subROM '" + opt[1] + "' to patch");
-				}
 			} catch(std::bad_alloc& e) {
 				OOM_panic();
 			} catch(std::exception& e) {
@@ -568,84 +356,64 @@ std::map<std::string, std::vector<char>> load_sram_commandline(const std::vector
 	return ret;
 }
 
-std::string name_subrom(enum rom_type major, unsigned romnumber) throw(std::bad_alloc)
+struct loaded_rom load_rom_from_commandline(std::vector<std::string> cmdline) throw(std::bad_alloc,
+	std::runtime_error)
 {
-	if(romnumber == 0)
-		return "ROM";
-	else if(romnumber == 1)
-		return "ROM XML";
-	else if(major == ROMTYPE_BSX && romnumber == 2)
-		return "BSX ROM";
-	else if(major == ROMTYPE_BSX && romnumber == 3)
-		return "BSX XML";
-	else if(major == ROMTYPE_BSXSLOTTED && romnumber == 2)
-		return "BSX ROM";
-	else if(major == ROMTYPE_BSXSLOTTED && romnumber == 3)
-		return "BSX XML";
-	else if(major == ROMTYPE_SGB && romnumber == 2)
-		return "DMG ROM";
-	else if(major == ROMTYPE_SGB && romnumber == 3)
-		return "DMG XML";
-	else if(major == ROMTYPE_SUFAMITURBO && romnumber == 2)
-		return "SLOT A ROM";
-	else if(major == ROMTYPE_SUFAMITURBO && romnumber == 3)
-		return "SLOT A XML";
-	else if(major == ROMTYPE_SUFAMITURBO && romnumber == 4)
-		return "SLOT B ROM";
-	else if(major == ROMTYPE_SUFAMITURBO && romnumber == 5)
-		return "SLOT B XML";
-	else if(romnumber % 2)
-		return "UNKNOWN XML";
-	else
-		return "UNKNOWN ROM";
+	struct rom_files f;
+	try {
+		f = rom_files(cmdline);
+		f.resolve_relative();
+	} catch(std::bad_alloc& e) {
+		OOM_panic();
+	} catch(std::exception& e) {
+		throw std::runtime_error(std::string("Can't resolve ROM files: ") + e.what());
+	}
+	messages << "ROM type: " << f.rtype->get_iname() << "/" << f.region->get_iname() << std::endl;
+	for(size_t i = 0; i < f.rtype->rom_slots(); i++) {
+		if(f.main_slots[i] != "")
+			messages << "'" << f.rtype->rom_slot(i)->get_hname() << "' file '" << f.main_slots[i]
+				<< std::endl;
+		if(f.markup_slots[i] != "" && f.rtype->rom_slot(i)->has_markup())
+			messages << "'" << f.rtype->rom_slot(i)->get_hname() << "' markup file '"
+				<< f.markup_slots[i] << std::endl;
+	}
+
+	struct loaded_rom r;
+	try {
+		r = loaded_rom(f);
+		r.do_patch(cmdline);
+	} catch(std::bad_alloc& e) {
+		OOM_panic();
+	} catch(std::exception& e) {
+		throw std::runtime_error(std::string("Can't load ROM: ") + e.what());
+	}
+
+	for(size_t i = 0; i < r.rtype->rom_slots(); i++) {
+		if(r.main_slots[i].valid)
+			messages << "'" << f.rtype->rom_slot(i)->get_hname() << "' hash " << r.main_slots[i].sha256
+				<< std::endl;
+		if(r.markup_slots[i].valid && r.rtype->rom_slot(i)->has_markup())
+			messages << "'" << f.rtype->rom_slot(i)->get_hname() << "' markup hash '"
+				<< r.markup_slots[i].sha256 << std::endl;
+	}
+
+	return r;
 }
 
-
-int recognize_commandline_rom(enum rom_type major, const std::string& romname) throw(std::bad_alloc)
+void dump_region_map() throw(std::bad_alloc)
 {
-	if(romname == romtypes_to_recognize[0])
-		return 0;
-	else if(romname == romtypes_to_recognize[6])
-		return 1;
-	else if(major == ROMTYPE_BSX && romname == romtypes_to_recognize[1])
-		return 2;
-	else if(major == ROMTYPE_BSX && romname == romtypes_to_recognize[7])
-		return 3;
-	else if(major == ROMTYPE_BSX && romname == romtypes_to_recognize[2])
-		return 2;
-	else if(major == ROMTYPE_BSX && romname == romtypes_to_recognize[8])
-		return 3;
-	else if(major == ROMTYPE_SGB && romname == romtypes_to_recognize[3])
-		return 2;
-	else if(major == ROMTYPE_SGB && romname == romtypes_to_recognize[9])
-		return 3;
-	else if(major == ROMTYPE_SUFAMITURBO && romname == romtypes_to_recognize[4])
-		return 2;
-	else if(major == ROMTYPE_SUFAMITURBO && romname == romtypes_to_recognize[10])
-		return 3;
-	else if(major == ROMTYPE_SUFAMITURBO && romname == romtypes_to_recognize[5])
-		return 4;
-	else if(major == ROMTYPE_SUFAMITURBO && romname == romtypes_to_recognize[11])
-		return 5;
-	else
-		return -1;
-}
-
-rom_type recognize_platform(unsigned long flags) throw(std::bad_alloc, std::runtime_error)
-{
-	if((flags & 07700) >> 6 & ~(flags & 077))
-		throw std::runtime_error("SubROM XML specified without corresponding subROM");
-	if((flags & 1) == 0)
-		throw std::runtime_error("No SNES main cartridge ROM specified");
-	if((flags & 077) == 1)
-		return ROMTYPE_SNES;
-	if((flags & 077) == 3)
-		return ROMTYPE_BSX;
-	if((flags & 077) == 5)
-		return ROMTYPE_BSXSLOTTED;
-	if((flags & 077) == 9)
-		return ROMTYPE_SGB;
-	if((flags & 060) != 0 && (flags & 017) == 1)
-		return ROMTYPE_SUFAMITURBO;
-	throw std::runtime_error("Not valid combination of rom/bsx/bsxslotted/dmg/slot-a/slot-b");
+	std::vector<vma_structure*> regions = get_regions();
+	for(auto i : regions) {
+		char buf[256];
+		char echar;
+		if(i->get_endian() == vma_structure::E_LITTLE)
+			echar = 'L';
+		if(i->get_endian() == vma_structure::E_BIG)
+			echar = 'B';
+		if(i->get_endian() == vma_structure::E_HOST)
+			echar = 'N';
+		sprintf(buf, "Region: %016X-%016X %016X %s%c %s", i->get_base(), i->get_base() + i->get_size() - 1,
+			i->get_size(), i->is_readonly() ? "R-" : "RW", echar, i->get_name().c_str());
+		messages << buf << std::endl;
+	}
 }
diff --git a/src/interface/bsnes.cpp b/src/interface/bsnes.cpp
index 30bc37b7..9771dfd7 100644
--- a/src/interface/bsnes.cpp
+++ b/src/interface/bsnes.cpp
@@ -16,6 +16,9 @@
 
 namespace
 {
+	uint64_t ntsc_magic[4] = {178683, 10738636, 16639264, 596096};
+	uint64_t pal_magic[4] = {6448, 322445, 19997208, 266440};
+
 	class my_interfaced : public SNES::Interface
 	{
 		string path(SNES::Cartridge::Slot slot, const string &hint)
@@ -23,6 +26,179 @@ namespace
 			return "./";
 		}
 	};
+
+	struct bsnes_region_info_structure : public region_info_structure
+	{
+		bsnes_region_info_structure(const std::string& _iname, const std::string& _hname, bool _autod)
+		{
+			hname = _hname;
+			iname = _iname;
+			autod = _autod;
+		}
+		~bsnes_region_info_structure() {}
+		std::string get_hname() { return hname; }
+		std::string get_iname() { return iname; }
+		bool compatible(const std::string& movie) { return autod || movie == iname; }
+		std::string hname;
+		std::string iname;
+		bool autod;
+	};
+
+	struct bsnes_sysregion_info_structure : public sysregion_info_structure
+	{
+		bsnes_sysregion_info_structure(const std::string& _iname, bool _pal)
+		{
+			iname = _iname;
+			pal = _pal;
+		}
+		~bsnes_sysregion_info_structure() {}
+		std::string get_iname() { return iname; }
+		void get_length_magic(uint64_t* magic)
+		{
+			if(pal)
+				memcpy(magic, pal_magic, sizeof(pal_magic));
+			else
+				memcpy(magic, ntsc_magic, sizeof(ntsc_magic));
+		}
+		std::string iname;
+		bool pal;
+	};
+
+	struct bsnes_rom_info_structure : public rom_info_structure
+	{
+		bsnes_rom_info_structure(const std::string& _iname, const std::string& _hname, unsigned _mflags)
+		{
+			iname = _iname;
+			hname = _hname;
+			mflags = _mflags;
+		}
+		~bsnes_rom_info_structure() {}
+		std::string get_iname() { return iname; }
+		std::string get_hname() { return hname; }
+		bool has_markup() { return true; }
+		size_t headersize(size_t imagesize)
+		{
+			return (imagesize % 1024 == 512) ? 512 : 0;
+		}
+		virtual unsigned mandatory_flags() { return mflags; }
+		std::string iname;
+		std::string hname;
+		unsigned mflags;
+	};
+
+	bsnes_region_info_structure r_autodetect("autodetect", "Autodetect", true);
+	bsnes_region_info_structure r_ntsc("ntsc", "NTSC", false);
+	bsnes_region_info_structure r_pal("pal", "PAL", false);
+	bsnes_sysregion_info_structure t_snes_ntsc("snes_ntsc", false);
+	bsnes_sysregion_info_structure t_snes_pal("snes_pal", true);
+	bsnes_sysregion_info_structure t_bsx("bsx", false);
+	bsnes_sysregion_info_structure t_bsxslotted("bsxslotted", false);
+	bsnes_sysregion_info_structure t_sufamiturbo("sufamiturbo", false);
+	bsnes_sysregion_info_structure t_sgb_ntsc("sgb_ntsc", false);
+	bsnes_sysregion_info_structure t_sgb_pal("sgb_pal", true);
+	bsnes_rom_info_structure g_snes("rom", "Cartridge ROM", 1);
+	bsnes_rom_info_structure g_bsx_bios("bsxbios", "BS-X BIOS", 1);
+	bsnes_rom_info_structure g_bsx_flash("bsxflash", "BS-X FLASH", 2);
+	bsnes_rom_info_structure g_st_bios("stbios", "Sufami Turbo BIOS", 1);
+	bsnes_rom_info_structure g_st_slota("stslota", "Slot A ROM", 2);
+	bsnes_rom_info_structure g_st_slotb("stslotb", "Slot B ROM", 2);
+	bsnes_rom_info_structure g_sgb_bios("sgbbios", "SGB BIOS", 1);
+	bsnes_rom_info_structure g_dmg("dmg", "DMG ROM", 2);
+
+	struct bsnes_systype : public systype_info_structure
+	{
+		bsnes_systype(int index)
+		{
+			switch(index) {
+			case 0:
+				iname = "snes";
+				hname = "SNES";
+				regslots.push_back(&r_autodetect);
+				regslots.push_back(&r_ntsc);
+				regslots.push_back(&r_pal);
+				romslots.push_back(&g_snes);
+				sysregions["ntsc"] = &t_snes_ntsc;
+				sysregions["pal"] = &t_snes_pal;
+				break;
+			case 1:
+				iname = "bsx";
+				hname = "BS-X (non-slotted)";
+				regslots.push_back(&r_ntsc);
+				romslots.push_back(&g_bsx_bios);
+				romslots.push_back(&g_bsx_flash);
+				sysregions["ntsc"] = &t_bsx;
+				break;
+			case 2:
+				iname = "bsxslotted";
+				hname = "BS-X (slotted)";
+				regslots.push_back(&r_ntsc);
+				romslots.push_back(&g_bsx_bios);
+				romslots.push_back(&g_bsx_flash);
+				sysregions["ntsc"] = &t_bsxslotted;
+				break;
+			case 3:
+				iname = "sufamiturbo";
+				hname = "Sufami Turbo";
+				regslots.push_back(&r_ntsc);
+				romslots.push_back(&g_st_bios);
+				romslots.push_back(&g_st_slota);
+				romslots.push_back(&g_st_slotb);
+				sysregions["ntsc"] = &t_sufamiturbo;
+				break;
+			case 4:
+				iname = "sgb";
+				hname = "Super Game Boy";
+				regslots.push_back(&r_autodetect);
+				regslots.push_back(&r_ntsc);
+				regslots.push_back(&r_pal);
+				romslots.push_back(&g_sgb_bios);
+				romslots.push_back(&g_dmg);
+				sysregions["ntsc"] = &t_sgb_ntsc;
+				sysregions["pal"] = &t_sgb_pal;
+				break;
+			};
+		}
+		~bsnes_systype() {};
+		std::string get_iname() { return iname; }
+		std::string get_hname() { return hname; }
+		size_t region_slots() { return regslots.size(); };
+		struct region_info_structure* region_slot(size_t index)
+		{
+			return (index < regslots.size()) ? regslots[index] : NULL;
+		}
+		size_t rom_slots() { return romslots.size(); }
+		struct rom_info_structure* rom_slot(size_t index)
+		{
+			return (index < romslots.size()) ? romslots[index] : NULL;
+		}
+		struct sysregion_info_structure* get_sysregion(const std::string& region)
+		{
+			return sysregions.count(region) ? sysregions[region] : NULL;
+		}
+		std::string iname;
+		std::string hname;
+		std::vector<region_info_structure*> regslots;
+		std::vector<rom_info_structure*> romslots;
+		std::map<std::string, sysregion_info_structure*> sysregions;
+	};
+
+	bsnes_systype s_snes(0);
+	bsnes_systype s_bsx(1);
+	bsnes_systype s_bsxslotted(2);
+	bsnes_systype s_sufamiturbo(3);
+	bsnes_systype s_sgb(4);
+
+	void internal_load(const std::vector<std::vector<char>>& romslots,
+		const std::vector<std::vector<char>>&markslots, size_t i, const uint8_t*& rom, const char*& xml,
+		size_t& romsize)
+	{
+		if(i < romslots.size() && romslots[i].size()) {
+			rom = reinterpret_cast<const uint8_t*>(&romslots[i][0]);
+			romsize = romslots[i].size();
+		}
+		if(i < markslots.size() && markslots[i].size())
+			xml = &markslots[i][0];
+	}
 }
 
 std::string emucore_get_version()
@@ -296,3 +472,76 @@ void emucore_unserialize(const std::vector<char>& buf)
 	if(!SNES::system.unserialize(s))
 		throw std::runtime_error("SNES core rejected savestate");
 }
+
+size_t emucore_systype_slots()
+{
+	return 5;
+}
+
+struct systype_info_structure* emucore_systype_slot(size_t index)
+{
+	switch(index) {
+	case 0:		return &s_snes;
+	case 1:		return &s_bsx;
+	case 2:		return &s_bsxslotted;
+	case 3:		return &s_sufamiturbo;
+	case 4:		return &s_sgb;
+	default:	return NULL;
+	};
+}
+
+void emucore_load_rom(systype_info_structure* rtype, region_info_structure* region,
+	const std::vector<std::vector<char>>& romslots, const std::vector<std::vector<char>>& markslots)
+{
+	if(region == &r_autodetect)
+		SNES::config.region = SNES::System::Region::Autodetect;
+	else if(region == &r_ntsc)
+		SNES::config.region = SNES::System::Region::NTSC;
+	else if(region == &r_pal)
+		SNES::config.region = SNES::System::Region::PAL;
+	else
+		throw std::runtime_error("Trying to force unknown region");
+	const uint8_t* rom0 = NULL;
+	const char* xml0 = NULL;
+	size_t rom0size = 0;
+	const uint8_t* rom1 = NULL;
+	const char* xml1 = NULL;
+	size_t rom1size = 0;
+	const uint8_t* rom2 = NULL;
+	const char* xml2 = NULL;
+	size_t rom2size = 0;
+	internal_load(romslots, markslots, 0, rom0, xml0, rom0size);
+	internal_load(romslots, markslots, 1, rom1, xml1, rom1size);
+	internal_load(romslots, markslots, 2, rom2, xml2, rom2size);
+
+	if(rtype == &s_snes) {
+		if(!snes_load_cartridge_normal(xml0, rom0, rom0size))
+			throw std::runtime_error("Can't load cartridge ROM");
+	} else if(rtype == &s_bsx) {
+		if(!snes_load_cartridge_bsx(xml0, rom0, rom0size, xml1, rom1, rom1size))
+			throw std::runtime_error("Can't load cartridge ROM");
+	} else if(rtype == &s_bsxslotted) {
+		if(!snes_load_cartridge_bsx_slotted(xml0, rom0, rom0size, xml1, rom1, rom1size))
+			throw std::runtime_error("Can't load cartridge ROM");
+	} else if(rtype == &s_sgb) {
+		if(!snes_load_cartridge_super_game_boy(xml0, rom0, rom0size, xml1, rom1, rom1size))
+			throw std::runtime_error("Can't load cartridge ROM");
+	} else if(rtype == &s_sufamiturbo) {
+		if(!snes_load_cartridge_sufami_turbo(xml0, rom0, rom0size, xml1, rom1, rom1size, xml2, rom2, rom2size))
+			throw std::runtime_error("Can't load cartridge ROM");
+	} else
+		throw std::runtime_error("Unknown cartridge type");
+	snes_power();
+	emucore_refresh_cart();
+}
+
+struct region_info_structure* emucore_current_region()
+{
+	return snes_get_region() ? &r_pal : &r_ntsc;
+}
+
+void emucore_pre_load_settings()
+{
+	SNES::config.random = false;
+	SNES::config.expansion_port = SNES::System::ExpansionPortDevice::None;
+}
\ No newline at end of file
diff --git a/src/interface/core.cpp b/src/interface/core.cpp
index f014246c..5fd6f71e 100644
--- a/src/interface/core.cpp
+++ b/src/interface/core.cpp
@@ -16,3 +16,64 @@ vma_structure::vma_structure(const std::string& _name, uint64_t _base, uint64_t
 vma_structure::~vma_structure()
 {
 }
+
+region_info_structure::~region_info_structure()
+{
+}
+
+sysregion_info_structure::~sysregion_info_structure()
+{
+}
+
+rom_info_structure::~rom_info_structure()
+{
+}
+
+systype_info_structure::~systype_info_structure()
+{
+}
+
+struct region_info_structure* emucore_region_for_sysregion(const std::string& sysregion)
+{
+	for(size_t i = 0; i < emucore_systype_slots(); i++) {
+		auto j = emucore_systype_slot(i);
+		for(size_t k = 0; k < j->region_slots(); k++) {
+			auto l = j->region_slot(k);
+			auto n = l->get_iname();
+			auto x = j->get_sysregion(n);
+			if(x && x->get_iname() == sysregion)
+				return l;
+		}
+	}
+	return NULL;
+}
+
+struct systype_info_structure* emucore_systype_for_sysregion(const std::string& sysregion)
+{
+	for(size_t i = 0; i < emucore_systype_slots(); i++) {
+		auto j = emucore_systype_slot(i);
+		for(size_t k = 0; k < j->region_slots(); k++) {
+			auto l = j->region_slot(k);
+			auto n = l->get_iname();
+			auto x = j->get_sysregion(n);
+			if(x && x->get_iname() == sysregion)
+				return j;
+		}
+	}
+	return NULL;
+}
+
+struct sysregion_info_structure* emucore_sysregion_for_sysregion(const std::string& sysregion)
+{
+	for(size_t i = 0; i < emucore_systype_slots(); i++) {
+		auto j = emucore_systype_slot(i);
+		for(size_t k = 0; k < j->region_slots(); k++) {
+			auto l = j->region_slot(k);
+			auto n = l->get_iname();
+			auto x = j->get_sysregion(n);
+			if(x && x->get_iname() == sysregion)
+				return x;
+		}
+	}
+	return NULL;
+}
diff --git a/src/platform/sdl/main.cpp b/src/platform/sdl/main.cpp
index 04622a6c..774b3ffb 100644
--- a/src/platform/sdl/main.cpp
+++ b/src/platform/sdl/main.cpp
@@ -28,13 +28,7 @@ struct moviefile generate_movie_template(std::vector<std::string> cmdline, loade
 	movie.port2 = PT_NONE;
 	movie.coreversion = emucore_get_version();
 	movie.projectid = get_random_hexstring(40);
-	movie.gametype = gtype::togametype(r.rtype, r.region);
-	movie.rom_sha256 = r.rom.sha256;
-	movie.romxml_sha256 = r.rom_xml.sha256;
-	movie.slota_sha256 = r.slota.sha256;
-	movie.slotaxml_sha256 = r.slota_xml.sha256;
-	movie.slotb_sha256 = r.slotb.sha256;
-	movie.slotbxml_sha256 = r.slotb_xml.sha256;
+	copy_romdata_to_movie(movie, r);
 	movie.movie_sram = load_sram_commandline(cmdline);
 	for(auto i = cmdline.begin(); i != cmdline.end(); i++) {
 		std::string o = *i;
@@ -179,11 +173,9 @@ int main(int argc, char** argv)
 		fatal_error();
 		exit(1);
 	}
-	messages << "Detected region: " << gtype::tostring(r.rtype, r.region) << std::endl;
-	if(r.region == REGION_PAL)
-		set_nominal_framerate(322445.0/6448.0);
-	else if(r.region == REGION_NTSC)
-		set_nominal_framerate(10738636.0/178683.0);
+	messages << "Detected region: " << r.rtype->get_sysregion(r.region->get_iname())->get_iname() << std::endl;
+	auto vrate = emucore_get_video_rate();
+	set_nominal_framerate(1.0 * vrate.first / vrate.second);
 
 	messages << "--- Internal memory mappings ---" << std::endl;
 	dump_region_map();
diff --git a/src/platform/wxwidgets/romselect.cpp b/src/platform/wxwidgets/romselect.cpp
index 7453e663..517c5d7e 100644
--- a/src/platform/wxwidgets/romselect.cpp
+++ b/src/platform/wxwidgets/romselect.cpp
@@ -26,28 +26,12 @@
 #define CNAME_SUPERSCOPE "Superscope"
 #define CNAME_JUSTIFIER "Justifier"
 #define CNAME_JUSTIFIERS "2 Justifiers"
-#define TNAME_SNES "SNES"
-#define TNAME_BSX_NS "BS-X (non-slotted)"
-#define TNAME_BSX_S "BS-X (slotted)"
-#define TNAME_SUFAMITURBO "Sufami Turbo"
-#define TNAME_SGB "SGB"
-#define RNAME_AUTO "Autodetect"
-#define RNAME_NTSC "NTSC"
-#define RNAME_PAL "PAL"
-#define WNAME_SNES_MAIN "Cartridge ROM"
-#define WNAME_BS_MAIN "BS-X BIOS"
-#define WNAME_BS_SLOTA "BS FLASH"
-#define WNAME_ST_MAIN "Sufami Turbo BIOS"
-#define WNAME_ST_SLOTA "SLOT A ROM"
-#define WNAME_ST_SLOTB "SLOT B ROM"
-#define WNAME_SGB_MAIN "SGB BIOS"
-#define WNAME_SGB_SLOTA "DMG ROM"
 #define MARKUP_POSTFIX " Markup"
 
 
 void patching_done(struct loaded_rom& rom, wxWindow* modwin);
 
-#define ROMSELECT_ROM_COUNT 3
+#define ROMSELECT_ROM_COUNT 27
 
 namespace
 {
@@ -72,137 +56,110 @@ namespace
 
 	struct loaded_slot& get_rom_slot(struct loaded_rom& rom, unsigned index)
 	{
-		switch(index) {
-		case 0:		return rom.rom;
-		case 1:		return rom.rom_xml;
-		case 2:		return rom.slota;
-		case 3:		return rom.slota_xml;
-		case 4:		return rom.slotb;
-		case 5:		return rom.slotb_xml;
+		if(index % 2)
+			return rom.markup_slots[index / 2];
+		else
+			return rom.main_slots[index / 2];
+	}
+
+	struct region_info_structure* region_from_string(struct systype_info_structure* s, const std::string& str)
+	{
+		for(size_t i = 0; i < s->region_slots(); i++) {
+			auto r = s->region_slot(i);
+			if(r->get_hname() == str)
+				return r;
 		}
-		return rom.rom;
+		return s->region_slot(0);
 	}
 
-	enum rom_region region_from_string(const std::string& str)
+	unsigned populate_region_choices(struct systype_info_structure* s, wxString* array)
 	{
-		if(str == RNAME_NTSC)
-			return REGION_NTSC;
-		if(str == RNAME_PAL)
-			return REGION_PAL;
-		return REGION_AUTO;
-	}
-
-	unsigned populate_region_choices(wxString* array)
-	{
-		array[0] = wxT(RNAME_AUTO);
-		array[1] = wxT(RNAME_NTSC);
-		array[2] = wxT(RNAME_PAL);
-		return 3;
+		if(!s) {
+			array[0] = towxstring("NULL");
+			return 1;
+		}
+		size_t x = s->region_slots();
+		for(size_t i = 0; i < x; i++)
+			array[i] = towxstring(s->region_slot(i)->get_hname());
+		return x;
 	}
 
 	unsigned populate_system_choices(wxString* array)
 	{
-		array[0] = wxT(TNAME_SNES);
-		array[1] = wxT(TNAME_BSX_NS);
-		array[2] = wxT(TNAME_BSX_S);
-		array[3] = wxT(TNAME_SUFAMITURBO);
-		array[4] = wxT(TNAME_SGB);
-		return 5;
+		size_t x = emucore_systype_slots();
+		for(size_t i = 0; i < x; i++)
+			array[i] = towxstring(emucore_systype_slot(i)->get_hname());
+		return x;
 	}
 
-	bool check_present_roms(enum rom_type rtype, unsigned flags)
+	bool check_present_roms(struct systype_info_structure* s, unsigned flags)
 	{
-		switch(rtype)
-		{
-		case ROMTYPE_SNES:
-			return ((flags & 1) == 1);
-		case ROMTYPE_BSX:
-		case ROMTYPE_BSXSLOTTED:
-		case ROMTYPE_SGB:
-			return ((flags & 3) == 3);
-		case ROMTYPE_SUFAMITURBO:
-			return ((flags & 1) == 1) && ((flags & 6) != 0);
-		default:
+		if(!s)
 			return false;
-		};
-	}
-
-	std::string romname(enum rom_type rtype, unsigned index)
-	{
-		switch(rtype) {
-		case ROMTYPE_SNES:
-			switch(index) {
-			case 0:		return WNAME_SNES_MAIN;
-			};
-			break;
-		case ROMTYPE_BSX:
-		case ROMTYPE_BSXSLOTTED:
-			switch(index) {
-			case 0:		return WNAME_BS_MAIN;
-			case 1:		return WNAME_BS_SLOTA;
-			};
-			break;
-		case ROMTYPE_SUFAMITURBO:
-			switch(index) {
-			case 0:		return WNAME_ST_MAIN;
-			case 1:		return WNAME_ST_SLOTA;
-			case 2:		return WNAME_ST_SLOTB;
-			};
-			break;
-		case ROMTYPE_SGB:
-			switch(index) {
-			case 0:		return WNAME_SGB_MAIN;
-			case 1:		return WNAME_SGB_SLOTA;
-			};
-			break;
-		case ROMTYPE_NONE:
-			break;
+		size_t x = s->rom_slots();
+		unsigned p = 0;
+		unsigned a = 0;
+		for(size_t i = 0; i < x; i++) {
+			unsigned lflags = s->rom_slot(i)->mandatory_flags();
+			a |= lflags;
+			if((flags >> i) & 1)
+				p |= lflags;
 		}
-		return "";
+		return (p == a);
 	}
 
-	unsigned romname_to_index(enum rom_type rtype, const wxString& _name)
+	std::string romname(struct systype_info_structure* s, unsigned index)
+	{
+		if(index >= s->rom_slots())
+			return "";
+		return s->rom_slot(index)->get_hname();
+	}
+
+	unsigned romname_to_index(struct systype_info_structure* s, const wxString& _name)
 	{
 		std::string name = tostdstring(_name);
-		for(unsigned i = 0; i < ROMSELECT_ROM_COUNT; i++) {
-			if(romname(rtype, i) == name)
+		for(unsigned i = 0; i < s->rom_slots(); i++) {
+			auto base = s->rom_slot(i)->get_hname();
+			if(base == name)
 				return 2 * i;
-			if(romname(rtype, i) + MARKUP_POSTFIX == name)
+			if(base + MARKUP_POSTFIX == name)
 				return 2 * i + 1;
 		}
-		return 2 * ROMSELECT_ROM_COUNT;
+		return 2 * s->rom_slots();
 	}
 
-	unsigned fill_rom_names(enum rom_type rtype, std::string* array)
+	unsigned fill_rom_names(struct systype_info_structure* s, std::string* array)
 	{
 		unsigned r = 0;
-		for(unsigned i = 0; i < ROMSELECT_ROM_COUNT; i++) {
-			std::string s = romname(rtype, i);
-			if(s.length())
-				array[r++] = s;
+		for(unsigned i = 0; i < s->rom_slots(); i++) {
+			std::string t = romname(s, i);
+			if(t.length())
+				array[r++] = t;
 		}
 		return r;
 	}
 
-	enum rom_type romtype_from_string(const std::string& str)
+	struct systype_info_structure* romtype_from_string(const std::string& str)
 	{
-		if(str == TNAME_SNES)
-			return ROMTYPE_SNES;
-		if(str == TNAME_BSX_NS)
-			return ROMTYPE_BSX;
-		if(str == TNAME_BSX_S)
-			return ROMTYPE_BSXSLOTTED;
-		if(str == TNAME_SUFAMITURBO)
-			return ROMTYPE_SUFAMITURBO;
-		if(str == TNAME_SGB)
-			return ROMTYPE_SGB;
-		return ROMTYPE_NONE;
+		for(size_t i = 0; i < emucore_systype_slots(); i++) {
+			auto j = emucore_systype_slot(i);
+			if(j->get_hname() == str)
+				return j;
+		}
+		return NULL;
 	}
 
-	bool has_forced_region(const std::string& str)
+	bool has_forced_region(struct systype_info_structure* s)
 	{
-		enum rom_type rtype = romtype_from_string(str);
-		return (rtype != ROMTYPE_SNES && rtype != ROMTYPE_SGB);
+		return (s->region_slots() <= 1);
+	}
+
+	std::string game_id(struct loaded_rom& r)
+	{
+		for(size_t i = 1; i < r.main_slots.size(); i++)
+			if(r.main_slots[i].valid)
+				return r.main_slots[i].sha256;
+		return r.main_slots[0].sha256;
 	}
 
 	class textboxloadfilename : public wxFileDropTarget
@@ -458,10 +415,10 @@ wxwin_romselect::wxwin_romselect()
 	: wxFrame(NULL, wxID_ANY, wxT("Select ROM"), wxDefaultPosition, wxSize(-1, -1),
 		wxMINIMIZE_BOX | wxSYSTEM_MENU | wxCAPTION | wxCLIP_CHILDREN | wxCLOSE_BOX)
 {
-	wxString rtchoices[32];
-	wxString rrchoices[32];
+	wxString rtchoices[128];
+	wxString rrchoices[128];
 	size_t systems = populate_system_choices(rtchoices);
-	size_t regions = populate_region_choices(rrchoices);
+	size_t regions = populate_region_choices(NULL, rrchoices);
 
 	Centre();
 
@@ -529,17 +486,32 @@ void wxwin_romselect::set_rtype(std::string rtype)
 		rtype = tostdstring(romtype_combo->GetValue());
 	if(rtype == current_rtype)
 		return;
-	if(has_forced_region(rtype)) {
+	auto _rtype = romtype_from_string(rtype);
+	if(has_forced_region(_rtype)) {
 		region_combo->Disable();
 		remembered_region = tostdstring(region_combo->GetValue());
+		region_combo->Clear();
+		region_combo->Append(towxstring(_rtype->region_slot(0)->get_hname()));
+		region_combo->SetSelection(0);
 	} else {
-		if(remembered_region != "")
+		if(remembered_region == "")
+			remembered_region = tostdstring(region_combo->GetValue());
+		region_combo->Clear();
+		bool old_ok = false;
+		for(size_t i = 0; i < _rtype->region_slots(); i++) {
+			std::string x = _rtype->region_slot(i)->get_hname();
+			region_combo->Append(towxstring(x));
+			if(x == remembered_region)
+				old_ok = true;
+		}
+		region_combo->SetSelection(0);
+		if(old_ok)
 			region_combo->SetValue(towxstring(remembered_region));
 		remembered_region = "";
 		region_combo->Enable();
 	}
 	std::string tmp[ROMSELECT_ROM_COUNT];
-	unsigned c = fill_rom_names(romtype_from_string(rtype), tmp);
+	unsigned c = fill_rom_names(_rtype, tmp);
 	for(unsigned i = 0; i < ROMSELECT_ROM_COUNT; i++)
 		slots[i]->hide(romgrid);
 	for(unsigned i = 0; i < c; i++) {
@@ -554,7 +526,7 @@ void wxwin_romselect::set_rtype(std::string rtype)
 void wxwin_romselect::on_file_change()
 {
 	bool ok = true;
-	enum rom_type rtype = romtype_from_string(tostdstring(romtype_combo->GetValue()));
+	auto rtype = romtype_from_string(tostdstring(romtype_combo->GetValue()));
 	unsigned flags = 0;
 	for(unsigned i = 0; i < ROMSELECT_ROM_COUNT; i++)
 		flags |= ((slots[i]->get_filename() != "") ? (1 << i) : 0);
@@ -589,21 +561,16 @@ void wxwin_romselect::on_openapply_rom(wxCommandEvent& e, bool apply)
 	rom_files rfiles;
 	rfiles.base_file = "";
 	rfiles.rtype = romtype_from_string(tostdstring(romtype_combo->GetValue()));
-	rfiles.region = region_from_string(tostdstring(region_combo->GetValue()));
-	rfiles.rom = slots[0]->get_filename();
-	rfiles.rom_xml = slots[0]->get_markup();
-	rfiles.slota = slots[1]->get_filename();
-	rfiles.slota_xml = slots[1]->get_markup();
-	rfiles.slotb = slots[2]->get_filename();
-	rfiles.slotb_xml = slots[2]->get_markup();
+	rfiles.region = region_from_string(rfiles.rtype, tostdstring(region_combo->GetValue()));
+	rfiles.main_slots.resize(rfiles.rtype->rom_slots());
+	rfiles.markup_slots.resize(rfiles.rtype->rom_slots());
+	for(size_t i = 0; i < rfiles.rtype->rom_slots() && i < ROMSELECT_ROM_COUNT; i++) {
+		rfiles.main_slots[i] = slots[i]->get_filename();
+		rfiles.markup_slots[i] = slots[i]->get_markup();
+	}
 	try {
 		our_rom = new loaded_rom(rfiles);
-		if(our_rom->slota.valid)
-			our_rom_name = our_rom->slota.sha256;
-		else if(our_rom->slotb.valid)
-			our_rom_name = our_rom->slotb.sha256;
-		else
-			our_rom_name = our_rom->rom.sha256;
+		our_rom_name = game_id(*our_rom);
 	} catch(std::exception& e) {
 		show_message_ok(this, "Error loading ROM", e.what(), wxICON_EXCLAMATION);
 		return;
@@ -767,22 +734,16 @@ void patching_done(struct loaded_rom& rom, wxWindow* modwin)
 	struct loaded_rom* our_rom = &rom;
 	try {
 		emucore_basic_init();
-		if(our_rom->slota.valid)
-			our_rom_name = our_rom->slota.sha256;
-		else if(our_rom->slotb.valid)
-			our_rom_name = our_rom->slotb.sha256;
-		else
-			our_rom_name = our_rom->rom.sha256;
+		our_rom_name = game_id(*our_rom);
 		our_rom->load();
 	} catch(std::exception& e) {
 		show_message_ok(modwin, "Error loading ROM", e.what(), wxICON_EXCLAMATION);
 		return;
 	}
-	messages << "Detected region: " << gtype::tostring(our_rom->rtype, our_rom->region) << std::endl;
-	if(our_rom->region == REGION_PAL)
-		set_nominal_framerate(322445.0/6448.0);
-	else if(our_rom->region == REGION_NTSC)
-		set_nominal_framerate(10738636.0/178683.0);
+	messages << "Detected region: " << our_rom->rtype->get_sysregion(our_rom->region->get_iname())->get_iname()
+		<< std::endl;
+	auto vrate = emucore_get_video_rate();
+	set_nominal_framerate(1.0 * vrate.first / vrate.second);
 
 	messages << "--- Internal memory mappings ---" << std::endl;
 	dump_region_map();
@@ -1028,7 +989,6 @@ struct moviefile wxwin_project::make_movie()
 {
 	moviefile f;
 	f.force_corrupt = false;
-	f.gametype = gtype::togametype(our_rom->rtype, our_rom->region);
 	f.port1 = get_controller_type(tostdstring(controller1type->GetValue()));
 	f.port2 = get_controller_type(tostdstring(controller2type->GetValue()));
 	f.coreversion = emucore_get_version();
@@ -1036,12 +996,7 @@ struct moviefile wxwin_project::make_movie()
 	f.prefix = sanitize_prefix(tostdstring(prefix->GetValue()));
 	f.projectid = get_random_hexstring(40);
 	f.rerecords = "0";
-	f.rom_sha256 = our_rom->rom.sha256;
-	f.romxml_sha256 = our_rom->rom_xml.sha256;
-	f.slota_sha256 = our_rom->slota.sha256;
-	f.slotaxml_sha256 = our_rom->slota_xml.sha256;
-	f.slotb_sha256 = our_rom->slotb.sha256;
-	f.slotbxml_sha256 = our_rom->slotb_xml.sha256;
+	copy_romdata_to_movie(f, *our_rom);
 	size_t lines = authors->GetNumberOfLines();
 	for(size_t i = 0; i < lines; i++) {
 		std::string l = tostdstring(authors->GetLineText(i));
diff --git a/src/util/lsnes-dumpavi.cpp b/src/util/lsnes-dumpavi.cpp
index 03f3e776..5b082484 100644
--- a/src/util/lsnes-dumpavi.cpp
+++ b/src/util/lsnes-dumpavi.cpp
@@ -257,11 +257,9 @@ int main(int argc, char** argv)
 		fatal_error();
 		exit(1);
 	}
-	messages << "Detected region: " << gtype::tostring(r.rtype, r.region) << std::endl;
-	if(r.region == REGION_PAL)
-		set_nominal_framerate(322445.0/6448.0);
-	else if(r.region == REGION_NTSC)
-		set_nominal_framerate(10738636.0/178683.0);
+	messages << "Detected region: " << r.rtype->get_sysregion(r.region->get_iname())->get_iname() << std::endl;
+	auto vrate = emucore_get_video_rate();
+	set_nominal_framerate(1.0 * vrate.first / vrate.second);
 
 	messages << "--- Internal memory mappings ---" << std::endl;
 	dump_region_map();
@@ -290,7 +288,9 @@ int main(int argc, char** argv)
 			throw std::runtime_error("Can't load any of the movies specified");
 		//Load ROM before starting the dumper.
 		our_rom = &r;
-		our_rom->region = gtype::toromregion(movie.gametype);
+		our_rom->region = emucore_region_for_sysregion(movie.gametype);
+		if(!our_rom->region)
+			throw std::runtime_error("Core does not support game type '" + movie.gametype + "'");
 		our_rom->load();
 		dumper_startup(dumper, mode, prefix, length);
 		startup_lua_scripts(cmdline);
diff --git a/src/util/movieinfo.cpp b/src/util/movieinfo.cpp
index 46f7a94b..12d21228 100644
--- a/src/util/movieinfo.cpp
+++ b/src/util/movieinfo.cpp
@@ -1,26 +1,26 @@
 #include "core/moviefile.hpp"
 #include "core/rrdata.hpp"
+#include "library/string.hpp"
 
 #include <iostream>
 #include <iomanip>
 #include <string>
 #include <sstream>
 
-std::string name_romtype(rom_type r)
+std::string name_romtype(systype_info_structure* r)
 {
-	if(r == ROMTYPE_SNES)		return "SNES";
-	if(r == ROMTYPE_BSX)		return "BS-X (non-slotted)";
-	if(r == ROMTYPE_BSXSLOTTED)	return "BS-X (slotted)";
-	if(r == ROMTYPE_SUFAMITURBO)	return "Sufami turbo";
-	if(r == ROMTYPE_SGB)		return "SGB";
-	return "Unknown";
+	if(r)
+		return r->get_hname();
+	else
+		return "Unknown";
 }
 
-std::string name_region(rom_region r)
+std::string name_region(region_info_structure* r)
 {
-	if(r == REGION_PAL)		return "PAL";
-	if(r == REGION_NTSC)		return "NTSC";
-	return "Unknown";
+	if(r)
+		return r->get_hname();
+	else
+		return "Unknown";
 }
 
 std::string name_porttype(porttype_t r)
@@ -60,8 +60,9 @@ int main(int argc, char** argv)
 	try {
 		uint64_t starting_point = 0;
 		struct moviefile m(argv[1]);
-		rom_type rtype = gtype::toromtype(m.gametype);
-		rom_region reg = gtype::toromregion(m.gametype);
+
+		auto rtype = emucore_systype_for_sysregion(m.gametype);
+		auto reg = emucore_region_for_sysregion(m.gametype);
 		std::cout << "Console: " << name_romtype(rtype) << std::endl;
 		std::cout << "Region: " << name_region(reg) << std::endl;
 		std::cout << "Port #1: " << name_porttype(m.port1) << std::endl;
@@ -72,32 +73,21 @@ int main(int argc, char** argv)
 		else
 			std::cout << "No game name available" << std::endl;
 		std::cout << "Project ID: " << escape_string(m.projectid) << std::endl;
-		if(m.rom_sha256 != "") {
-			std::cout << "ROM checksum: " << escape_string(m.rom_sha256) << std::endl;
-			if(m.romxml_sha256 != "")
-				std::cout << "ROM XML checksum: " << escape_string(m.romxml_sha256) << std::endl;
-			else
-				std::cout << "Using default settings for ROM" << std::endl;
-		} else
-			std::cout << "No main ROM present" << std::endl;
-		if(m.slota_sha256 != "") {
-			std::cout << "BS/ST-A/DMG checksum: " << escape_string(m.slota_sha256) << std::endl;
-			if(m.slotaxml_sha256 != "")
-				std::cout << "BS/ST-A/DMG XML checksum: " << escape_string(m.slotaxml_sha256)
+		for(size_t i = 0; i < m.main_checksums.size(); i++) {
+			std::string name = (stringfmt() << "Unknown ROM #" << i).str();
+			if(rtype && rtype->rom_slot(i))
+				name = rtype->rom_slot(i)->get_hname();
+			if(m.main_checksums[i] != "")
+				std::cout << name << " checksum: "<< escape_string(m.main_checksums[i]) << std::endl;
+		}
+		for(size_t i = 0; i < m.markup_checksums.size(); i++) {
+			std::string name = (stringfmt() << "Unknown ROM #" << i).str();
+			if(rtype && rtype->rom_slot(i))
+				name = rtype->rom_slot(i)->get_hname();
+			if(m.markup_checksums[i] != "")
+				std::cout << name << " markup checksum: "<< escape_string(m.markup_checksums[i])
 					<< std::endl;
-			else
-				std::cout << "Using default settings for BS/ST-A/DMG" << std::endl;
-		} else
-			std::cout << "No BS/ST-A/DMG present" << std::endl;
-		if(m.slotb_sha256 != "") {
-			std::cout << "ST-B checksum: " << escape_string(m.slotb_sha256) << std::endl;
-			if(m.slotbxml_sha256 != "")
-				std::cout << "ST-B XML checksum: " << escape_string(m.slotbxml_sha256)
-					<< std::endl;
-			else
-				std::cout << "Using default settings for BS/ST-A/DMG" << std::endl;
-		} else
-			std::cout << "No ST-B present" << std::endl;
+		}
 		for(auto i = m.authors.begin(); i != m.authors.end(); i++) {
 			if(i->first != "" && i->second != "")
 				std::cout << "Author: " << escape_string(i->first) << " (" << escape_string(i->second)
diff --git a/src/video/sdmp.cpp b/src/video/sdmp.cpp
index bfc60356..626c71e4 100644
--- a/src/video/sdmp.cpp
+++ b/src/video/sdmp.cpp
@@ -1,5 +1,5 @@
 #include "lsnes.hpp"
-//#include <snes/snes.hpp>
+
 #include "core/advdumper.hpp"
 #include "core/dispatch.hpp"
 #include "interface/core.hpp"