diff --git a/Machines/Electron/Electron.cpp b/Machines/Electron/Electron.cpp
index edde9f14e..647ed2ed6 100644
--- a/Machines/Electron/Electron.cpp
+++ b/Machines/Electron/Electron.cpp
@@ -43,7 +43,8 @@ class ConcreteMachine:
 			uint8_t *target = nullptr;
 			switch(slot) {
 				case ROMSlotDFS:	dfs_ = data;			return;
-				case ROMSlotADFS:	adfs_ = data;			return;
+				case ROMSlotADFS1:	adfs1_ = data;			return;
+				case ROMSlotADFS2:	adfs2_ = data;			return;
 
 				case ROMSlotOS:		target = os_;			break;
 				default:
@@ -55,6 +56,28 @@ class ConcreteMachine:
 			memcpy(target, &data[0], std::min(static_cast<size_t>(16384), data.size()));
 		}
 
+		// Obtains the system ROMs.
+		bool install_roms(const std::function<std::unique_ptr<std::vector<uint8_t>>(const std::string &machine, const std::string &name)> &rom_with_name) override {
+			ROMSlot slots[] = {
+				ROMSlotDFS,
+				ROMSlotADFS1, ROMSlotADFS2,
+				ROMSlotBASIC, ROMSlotOS
+			};
+			const char *os_files[] = {
+				"DFS-1770-2.20.rom",
+				"ADFS-E00_1.rom",	"ADFS-E00_2.rom",
+				"basic.rom",		"os.rom"
+			};
+
+			for(size_t index = 0; index < sizeof(os_files) / sizeof(*os_files); ++index) {
+				auto data = rom_with_name("Electron", os_files[index]);
+				if(!data) return false;
+				set_rom(slots[index], *data, false);
+			}
+
+			return true;
+		}
+
 		void set_key_state(uint16_t key, bool isPressed) override final {
 			if(key == KeyBreak) {
 				m6502_.set_reset_line(isPressed);
@@ -91,8 +114,8 @@ class ConcreteMachine:
 					set_rom(ROMSlot0, dfs_, true);
 				}
 				if(target.acorn.has_adfs) {
-					set_rom(ROMSlot4, adfs_, true);
-					set_rom(ROMSlot5, std::vector<uint8_t>(adfs_.begin() + 16384, adfs_.end()), true);
+					set_rom(ROMSlot4, adfs1_, true);
+					set_rom(ROMSlot5, adfs2_, true);
 				}
 			}
 
@@ -435,7 +458,7 @@ class ConcreteMachine:
 		uint8_t roms_[16][16384];
 		bool rom_write_masks_[16] = {false, false, false, false, false, false, false, false, false, false, false, false, false, false, false, false};
 		uint8_t os_[16384], ram_[32768];
-		std::vector<uint8_t> dfs_, adfs_;
+		std::vector<uint8_t> dfs_, adfs1_, adfs2_;
 
 		// Paging
 		ROMSlot active_rom_ = ROMSlot::ROMSlot0;
diff --git a/Machines/Electron/Electron.hpp b/Machines/Electron/Electron.hpp
index 724956157..cc76e219e 100644
--- a/Machines/Electron/Electron.hpp
+++ b/Machines/Electron/Electron.hpp
@@ -28,7 +28,8 @@ enum ROMSlot: uint8_t {
 
 	ROMSlot12,	ROMSlot13,	ROMSlot14,	ROMSlot15,
 
-	ROMSlotOS,	ROMSlotDFS,	ROMSlotADFS
+	ROMSlotOS,		ROMSlotDFS,
+	ROMSlotADFS1,	ROMSlotADFS2
 };
 
 /*!
diff --git a/Machines/Oric/Oric.cpp b/Machines/Oric/Oric.cpp
index 0e1ad22c7..f5cacc1ad 100644
--- a/Machines/Oric/Oric.cpp
+++ b/Machines/Oric/Oric.cpp
@@ -203,6 +203,22 @@ class ConcreteMachine:
 			}
 		}
 
+		// Obtains the system ROMs.
+		bool install_roms(const std::function<std::unique_ptr<std::vector<uint8_t>>(const std::string &machine, const std::string &name)> &rom_with_name) override {
+			const char *os_files[] = {
+				"basic10.rom",	"basic11.rom",
+				"microdisc.rom", "colour.rom"
+			};
+
+			for(size_t index = 0; index < sizeof(os_files) / sizeof(*os_files); ++index) {
+				auto data = rom_with_name("Oric", os_files[index]);
+				if(!data) return false;
+				set_rom(static_cast<ROM>(index), *data);
+			}
+
+			return true;
+		}
+
 		void set_key_state(uint16_t key, bool is_pressed) override final {
 			if(key == KeyNMI) {
 				m6502_.set_nmi_line(is_pressed);
diff --git a/Machines/Oric/Oric.hpp b/Machines/Oric/Oric.hpp
index 9a69965a7..4e4a8c418 100644
--- a/Machines/Oric/Oric.hpp
+++ b/Machines/Oric/Oric.hpp
@@ -19,7 +19,7 @@
 namespace Oric {
 
 enum ROM {
-	BASIC10, BASIC11, Microdisc, Colour
+	BASIC10 = 0, BASIC11, Microdisc, Colour
 };
 
 /*!
diff --git a/Machines/ZX8081/ZX8081.cpp b/Machines/ZX8081/ZX8081.cpp
index dcedbdeeb..d9186cc73 100644
--- a/Machines/ZX8081/ZX8081.cpp
+++ b/Machines/ZX8081/ZX8081.cpp
@@ -297,6 +297,21 @@ template<bool is_zx81> class ConcreteMachine:
 			}
 		}
 
+		// Obtains the system ROMs.
+		bool install_roms(const std::function<std::unique_ptr<std::vector<uint8_t>>(const std::string &machine, const std::string &name)> &rom_with_name) override {
+			const char *os_files[] = {
+				"zx80.rom",	"zx81.rom",
+			};
+
+			for(size_t index = 0; index < sizeof(os_files) / sizeof(*os_files); ++index) {
+				auto data = rom_with_name("ZX8081", os_files[index]);
+				if(!data) return false;
+				set_rom(static_cast<ROMType>(index), *data);
+			}
+
+			return true;
+		}
+
 #pragma mark - Keyboard
 
 		void set_key_state(uint16_t key, bool isPressed) override final {
diff --git a/Machines/ZX8081/ZX8081.hpp b/Machines/ZX8081/ZX8081.hpp
index 9750183e6..8e119823d 100644
--- a/Machines/ZX8081/ZX8081.hpp
+++ b/Machines/ZX8081/ZX8081.hpp
@@ -19,7 +19,7 @@
 namespace ZX8081 {
 
 enum ROMType: uint8_t {
-	ZX80, ZX81
+	ZX80 = 0, ZX81
 };
 
 class Machine: