diff --git a/src/core/CMakeLists.txt b/src/core/CMakeLists.txt
index 45d52eee..6ab671a2 100644
--- a/src/core/CMakeLists.txt
+++ b/src/core/CMakeLists.txt
@@ -4,7 +4,6 @@ project(cores CXX)
 set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
-add_subdirectory(gb)
 add_subdirectory(n64)
 
 add_library(cores
diff --git a/src/core/gb/CMakeLists.txt b/src/core/gb/CMakeLists.txt
deleted file mode 100644
index 269bf181..00000000
--- a/src/core/gb/CMakeLists.txt
+++ /dev/null
@@ -1,37 +0,0 @@
-cmake_minimum_required(VERSION 3.20)
-project(gb CXX)
-set(CMAKE_CXX_STANDARD 17)
-set(CMAKE_CXX_STANDARD_REQUIRED ON)
-
-include(FetchContent)
-FetchContent_Declare(
-  mio
-  GIT_REPOSITORY https://github.com/CocoSimone/mio
-  GIT_TAG master
-)
-FetchContent_Declare(
-  toml11
-  GIT_REPOSITORY https://github.com/ToruNiina/toml11
-  GIT_TAG dcfe39a783a94e8d52c885e5883a6fbb21529019
-)
-
-FetchContent_MakeAvailable(mio toml11)
-find_package(fmt REQUIRED)
-
-add_library(gb
-  Core.hpp
-  Core.cpp
-  Cpu.hpp
-  Cpu.cpp
-  Ppu.hpp
-  Ppu.cpp
-  Mem.cpp
-  Mem.hpp
-  mbc.cpp
-  mbc.hpp
-  memory_regions.hpp
-  ../BaseCore.cpp
-  ../BaseCore.hpp)
-target_include_directories(gb PRIVATE . .. ../../../external)
-target_include_directories(gb PUBLIC ${mio_SOURCE_DIR}/include ${toml11_SOURCE_DIR}/include)
-target_link_libraries(gb PRIVATE toml11::toml11 mio::mio fmt::fmt)
diff --git a/src/core/gb/Core.cpp b/src/core/gb/Core.cpp
deleted file mode 100644
index 5c994326..00000000
--- a/src/core/gb/Core.cpp
+++ /dev/null
@@ -1,20 +0,0 @@
-#include <Core.hpp>
-#include <SDL2/SDL_events.h>
-
-namespace natsukashii::gb::core {
-Core::Core(const std::string& rom) {
-  mem.LoadROM(rom);
-}
-
-void Core::Run() {
-  while(true) {
-    cpu.Step(mem);
-  }
-}
-
-void Core::PollInputs(u32 windowID) {
-  SDL_Event event;
-  SDL_PollEvent(&event);
-  ShouldQuit() = event.type == SDL_WINDOWEVENT && event.window.event == SDL_WINDOWEVENT_CLOSE && event.window.windowID == windowID;
-}
-}
diff --git a/src/core/gb/Core.hpp b/src/core/gb/Core.hpp
deleted file mode 100644
index 25d6e2d7..00000000
--- a/src/core/gb/Core.hpp
+++ /dev/null
@@ -1,19 +0,0 @@
-#pragma once
-#include <Cpu.hpp>
-#include <Ppu.hpp>
-#include <Mem.hpp>
-#include <BaseCore.hpp>
-
-namespace natsukashii::gb::core {
-using namespace natsukashii::core;
-struct Core : BaseCore {
-  ~Core() override = default;
-  explicit Core(const std::string&);
-  void Run() override;
-  void PollInputs(u32) override;
-private:
-  Mem mem;
-  Cpu cpu;
-  // Ppu ppu;
-};
-}
diff --git a/src/core/gb/Cpu.cpp b/src/core/gb/Cpu.cpp
deleted file mode 100644
index ac28c986..00000000
--- a/src/core/gb/Cpu.cpp
+++ /dev/null
@@ -1,30 +0,0 @@
-#include <Cpu.hpp>
-#include <util.hpp>
-
-namespace natsukashii::gb::core {
-Cpu::Cpu() {}
-
-void Cpu::Step(Mem& mem) {
-  FetchDecodeExecute(mem);
-}
-
-void Cpu::FetchDecodeExecute(Mem& mem) {
-  u8 opcode = mem.Read8(regs.pc);
-  switch(opcode) {
-    case 0x01: case 0x11: case 0x21: case 0x31: // LD r16, u16
-      SetR16<1>((opcode >> 4) & 3, mem.Consume16(regs.pc));
-      break;
-    case 0xA8 ... 0xAF: // XOR A, r8
-      regs.a() ^= GetR8(opcode & 7, mem);
-      regs.f().set(regs.a() == 0, false, false, false);
-      break;
-    case 0x02: case 0x12: case 0x22: case 0x32: {
-      u8 bits = (opcode >> 4) & 3;
-      mem.Write8(GetR16<2>(bits), regs.a());
-    } break;
-    default: util::panic("Unimplemented opcode {:02X}, pc: {:04X}", opcode, regs.pc);
-  }
-
-  regs.pc++;
-}
-}
diff --git a/src/core/gb/Cpu.hpp b/src/core/gb/Cpu.hpp
deleted file mode 100644
index 9947462e..00000000
--- a/src/core/gb/Cpu.hpp
+++ /dev/null
@@ -1,184 +0,0 @@
-#pragma once
-#include <Mem.hpp>
-#include <util.hpp>
-
-namespace natsukashii::gb::core {
-template <class T1, class T2>
-struct Reg {
-  Reg() : raw(0) {};
-  union {
-    T1 hi;
-    T2 lo;
-  };
-  u16 raw = 0;
-};
-
-struct RegF {
-  RegF() : raw(0) {}
-  RegF(const u8& val) : raw(val) {}
-
-  RegF& operator=(const u8& rhs) {
-    raw |= ((rhs >> 7) << 7);
-    raw |= ((rhs >> 6) << 6);
-    raw |= ((rhs >> 5) << 5);
-    raw |= ((rhs >> 4) << 4);
-
-    return *this;
-  }
-
-  bool zero() { return (raw >> 7) & 1; }
-  bool negative() { return (raw >> 6) & 1; }
-  bool halfcarry() { return (raw >> 5) & 1; }
-  bool carry() { return (raw >> 4) & 1; }
-
-  void reset() {
-    zero(false);
-    negative(false);
-    halfcarry(false);
-    carry(false);
-  }
-
-  void set(bool z, bool n, bool hc, bool ca) {
-    zero(z);
-    negative(n);
-    halfcarry(hc);
-    carry(ca);
-  }
-
-  u8& get() { return raw; }
-private:
-  u8 raw = 0;
-
-  void zero(const bool& rhs) {
-    raw &= ~0xF;
-    raw |= (rhs << 7);
-  }
-
-  void negative(const bool& rhs) {
-    raw &= ~0xF;
-    raw |= (rhs << 6);
-  }
-
-  void halfcarry(const bool& rhs) {
-    raw &= ~0xF;
-    raw |= (rhs << 5);
-  }
-
-  void carry(const bool& rhs) {
-    raw &= ~0xF;
-    raw |= (rhs << 4);
-  }
-};
-
-struct Registers {
-  Reg<u8, RegF> AF;
-  Reg<u8,   u8> BC;
-  Reg<u8,   u8> DE;
-  Reg<u8,   u8> HL;
-  u16 pc = 0, sp = 0;
-
-    u8& a() { return AF.hi; }
-  RegF& f() { return AF.lo; }
-    u8& b() { return BC.hi; }
-    u8& c() { return BC.lo; }
-    u8& d() { return DE.hi; }
-    u8& e() { return DE.lo; }
-    u8& h() { return HL.hi; }
-    u8& l() { return HL.lo; }
-  
-  u16& af() { return AF.raw; }
-  u16& bc() { return BC.raw; }
-  u16& de() { return DE.raw; }
-  u16& hl() { return HL.raw; } 
-};
-
-struct Cpu {
-  Cpu();
-  void Step(Mem&);
-private:
-  void FetchDecodeExecute(Mem& mem);
-  Registers regs;
-
-  template <int group>
-  u16 GetR16(u8 bits) {
-    static_assert(group > 0 && group < 3, "Invalid GetR16 group");
-    if constexpr (group == 1) {
-      switch(bits & 3) {
-        case 0: return regs.bc();
-        case 1: return regs.de();
-        case 2: return regs.hl();
-        case 3: return regs.sp;
-      }
-    } else if constexpr (group == 2) {
-      switch(bits & 3) {
-        case 0: return regs.bc();
-        case 1: return regs.de();
-        case 2: return regs.hl()++;
-        case 3: return regs.hl()--;
-      }
-    } else if constexpr (group == 3) {
-      switch(bits & 3) {
-        case 0: return regs.bc();
-        case 1: return regs.de();
-        case 2: return regs.hl();
-        case 3: return regs.af();
-      }
-    }
-    return 0;
-  }
-
-  template <int group>
-  void SetR16(u8 bits, u16 val) {
-    static_assert(group > 0 && group < 3, "Invalid SetR16 group");
-    if constexpr (group == 1) {
-      switch(bits & 3) {
-        case 0: regs.bc() = val; break;
-        case 1: regs.de() = val; break;
-        case 2: regs.hl() = val; break;
-        case 3: regs.sp = val; break;
-      }
-    } else if constexpr (group == 2) {
-      switch(bits & 3) {
-        case 0: regs.bc() = val; break;
-        case 1: regs.de() = val; break;
-        case 2: regs.hl() = val; regs.hl()++; break;
-        case 3: regs.hl() = val; regs.hl()--; break;
-      }
-    } else if constexpr (group == 3) {
-      switch(bits & 3) {
-        case 0: regs.bc() = val; break;
-        case 1: regs.de() = val; break;
-        case 2: regs.hl() = val; break;
-        case 3: regs.af() = val; break;
-      }
-    }
-  }
-
-  u8 GetR8(u8 bits, Mem& mem) {
-    switch(bits & 7) {
-      case 0: return regs.b();
-      case 1: return regs.c();
-      case 2: return regs.d();
-      case 3: return regs.e();
-      case 4: return regs.h();
-      case 5: return regs.l();
-      case 6: return mem.Read8(regs.hl());
-      case 7: return regs.a();
-    }
-    return 0;
-  }
-
-  void SetR8(u8 bits, u8 val, Mem& mem) {
-    switch(bits & 7) {
-      case 0: regs.b() = val; break;
-      case 1: regs.c() = val; break;
-      case 2: regs.d() = val; break;
-      case 3: regs.e() = val; break;
-      case 4: regs.h() = val; break;
-      case 5: regs.l() = val; break;
-      case 6: return mem.Write8(regs.hl(), val);
-      case 7: regs.a() = val; break;
-    }
-  }
-};
-}
diff --git a/src/core/gb/Mem.cpp b/src/core/gb/Mem.cpp
deleted file mode 100644
index 4b86f174..00000000
--- a/src/core/gb/Mem.cpp
+++ /dev/null
@@ -1,92 +0,0 @@
-#include <Mem.hpp>
-#include <util.hpp>
-#include <memory_regions.hpp>
-#include <fstream>
-#include <toml.hpp>
-
-namespace natsukashii::gb::core {
-Mem::Mem() {
-  auto data = toml::parse("config.toml");
-  auto gb = toml::find(data, "gb");
-  auto bootromPath = toml::find<std::string>(gb, "bootrom");
-
-  LoadBootROM(bootromPath);
-}
-
-void Mem::LoadBootROM(const std::string &filename) {
-  std::ifstream file(filename, std::ios::binary);
-  file.unsetf(std::ios::skipws);
-
-  if(!file.is_open()) {
-    util::panic("Unable to open {}!", filename);
-  }
-
-  file.read(reinterpret_cast<char*>(bootrom), 256);
-  file.close();
-}
-
-void Mem::LoadROM(const std::string& filename) {
-  std::ifstream file(filename, std::ios::binary);
-  file.unsetf(std::ios::skipws);
-
-  if(!file.is_open()) {
-    util::panic("Unable to open {}!", filename);
-  }
-
-  file.seekg(std::ios::end);
-  auto size = file.tellg();
-  file.seekg(std::ios::beg);
-
-  std::vector<u8> rom;
-  rom.reserve(size);
-  rom.insert(rom.begin(),
-             std::istream_iterator<u8>(file),
-             std::istream_iterator<u8>());
-
-  file.close();
-  switch(rom[0x147]) {
-    case 0:
-      cart = std::make_unique<NoMBC>(rom);
-      break;
-    default:
-      util::panic("Unimplemented cartridge type {:02X}!", rom[0x147]);
-  }
-}
-
-u8 Mem::Read8(u16 addr) {
-  switch(addr) {
-    case ROM_RNG00: return io.BootROMMapped() ? bootrom[addr] : cart->Read(addr);
-    case ROM_RNGNN: return cart->Read(addr);
-    default: util::panic("[READ] Unimplemented addr:  {:04X}", addr);
-  }
-
-  return 0;
-}
-
-void Mem::Write8(u16 addr, u8 val) {
-  switch(addr) {
-    case ROM_RNG00: case ROM_RNGNN: cart->Write(addr, val);
-    default: util::panic("[WRITE] Unimplemented addr:  {:04X}", addr);
-  }
-}
-
-u8 Mem::Consume8(u16& pc) {
-  u8 result = Read8(pc);
-  pc += 1;
-  return result;
-}
-
-u16 Mem::Read16(u16 addr) {
-  return ((u16)Read8(addr) << 8) | Read8(addr + 1);
-}
-
-void Mem::Write16(u16 addr, u16 val) {
-  Write8(addr, val >> 8);
-  Write8(addr + 1, val & 0xff);
-}
-
-u16 Mem::Consume16(u16& pc) {
-  u8 hi = Consume8(pc);
-  return ((u16)hi << 8) | Consume8(pc);
-}
-}
diff --git a/src/core/gb/Mem.hpp b/src/core/gb/Mem.hpp
deleted file mode 100644
index d4b3309f..00000000
--- a/src/core/gb/Mem.hpp
+++ /dev/null
@@ -1,31 +0,0 @@
-#pragma once
-#include <common.hpp>
-#include <memory>
-#include <vector>
-#include <mio/mmap.hpp>
-#include <memory_regions.hpp>
-#include <mbc.hpp>
-
-namespace natsukashii::gb::core {
-struct IO {
-  [[nodiscard]] bool BootROMMapped() const { return ff50 != 1; }
-private:
-  u8 ff50 = 0;
-};
-
-struct Mem {
-  Mem();
-  void LoadROM(const std::string& filename);
-  u8 Read8(u16 addr);
-  void Write8(u16 addr, u8 val);
-  u8 Consume8(u16& pc);
-  u16 Read16(u16 addr);
-  void Write16(u16 addr, u16 val);
-  u16 Consume16(u16& pc);
-private:
-  void LoadBootROM(const std::string& filename);
-  std::unique_ptr<Cartridge> cart;
-  IO io{};
-  u8 bootrom[BOOTROM_SIZE]{};
-};
-}
diff --git a/src/core/gb/Ppu.cpp b/src/core/gb/Ppu.cpp
deleted file mode 100644
index e69de29b..00000000
diff --git a/src/core/gb/Ppu.hpp b/src/core/gb/Ppu.hpp
deleted file mode 100644
index e69de29b..00000000
diff --git a/src/core/gb/mbc.cpp b/src/core/gb/mbc.cpp
deleted file mode 100644
index 1fd22424..00000000
--- a/src/core/gb/mbc.cpp
+++ /dev/null
@@ -1,15 +0,0 @@
-#include <mbc.hpp>
-#include <utility>
-#include <util.hpp>
-
-namespace natsukashii::gb::core {
-NoMBC::NoMBC(std::vector<u8> rom) : data(std::move(rom)) {}
-
-u8 NoMBC::Read(u16 addr) {
-  return data[addr];
-}
-
-void NoMBC::Write(u16 addr, u8 val) {
-  util::panic("Writing to a NoMBC cartridge is not allowed! (Addr: {:04X})", addr);
-}
-}
diff --git a/src/core/gb/mbc.hpp b/src/core/gb/mbc.hpp
deleted file mode 100644
index 3ebf8e7c..00000000
--- a/src/core/gb/mbc.hpp
+++ /dev/null
@@ -1,18 +0,0 @@
-#pragma once
-#include <common.hpp>
-#include <vector>
-
-namespace natsukashii::gb::core {
-struct Cartridge {
-  virtual u8 Read(u16 addr) { return 0; }
-  virtual void Write(u16 addr, u8 val) {}
-};
-
-struct NoMBC : public Cartridge {
-  explicit NoMBC(std::vector<u8> rom);
-  u8 Read(u16 addr) override;
-  void Write(u16 addr, u8 val) override;
-private:
-  std::vector<u8> data{};
-};
-}
diff --git a/src/core/gb/memory_regions.hpp b/src/core/gb/memory_regions.hpp
deleted file mode 100644
index 3e06cc04..00000000
--- a/src/core/gb/memory_regions.hpp
+++ /dev/null
@@ -1,34 +0,0 @@
-#pragma once
-#include <common.hpp>
-
-#define BOOTROM_SIZE 512
-#define ROM_STR00 0x0000
-#define ROM_END00 ROM_STR00 + 0x3fff
-#define ROM_STRNN ROM_END00 + 1
-#define ROM_ENDNN ROM_STRNN + 0x3fff
-#define ROM_RNG00 ROM_STR00 ... ROM_END00
-#define ROM_RNGNN ROM_STRNN ... ROM_ENDNN
-#define VRAM_START ROM_ENDNN + 1
-#define VRAM_END VRAM_START + 0x1fff
-#define VRAM_RANGE VRAM_START ... VRAM_END
-#define EXTRAM_START VRAM_END + 1
-#define EXTRAM_END EXTRAM_START + 0x1fff
-#define EXTRAM_RANGE EXTRAM_START ... EXTRAM_END
-#define WRAM_STR00 EXTRAM_END + 1
-#define WRAM_END00 WRAM_STR00 + 0xfff
-#define WRAM_STRNN WRAM_END00 + 1
-#define WRAM_ENDNN WRAM_STRNN + 0xfff
-#define WRAM_RNG00 WRAM_STR00 ... WRAM_END00
-#define WRAM_RNGNN WRAM_STRNN ... WRAM_ENDNN
-#define OAM_START WRAM_ENDNN + 1
-#define OAM_END OAM_START + 0x9F
-#define OAM_RANGE OAM_START ... OAM_END
-#define UNUSABLE_START OAM_END + 1
-#define UNUSABLE_END UNUSABLE_START + 0x5F
-#define UNUSABLE_RANGE UNUSABLE_START ... UNUSABLE_END
-#define IO_START UNUSABLE_END + 1
-#define IO_END IO_START + 0x7F
-#define IO_RANGE IO_START ... IO_END
-#define HRAM_START IO_END + 1
-#define HRAM_END HRAM_START + 0x7E
-#define HRAM_RANGE HRAM_START ... HRAM_END
diff --git a/src/core/n64/core/CMakeLists.txt b/src/core/n64/core/CMakeLists.txt
index a4d3f036..65d0f74b 100644
--- a/src/core/n64/core/CMakeLists.txt
+++ b/src/core/n64/core/CMakeLists.txt
@@ -3,6 +3,8 @@ project(n64-core)
 
 add_subdirectory(cpu)
 
+add_subdirectory(../../../../external temp)
+
 add_library(n64-core
   Cpu.hpp
   Cpu.cpp
@@ -11,7 +13,17 @@ add_library(n64-core
   RDP.cpp
   RDP.hpp
   mmio/VI.cpp
-  mmio/VI.hpp mmio/Interrupt.hpp mmio/MI.cpp mmio/MI.hpp mmio/Interrupt.cpp MMIO.cpp MMIO.hpp RSP.cpp RSP.hpp rsp/decode.cpp rsp/instructions.cpp)
+  mmio/VI.hpp
+  mmio/Interrupt.hpp
+  mmio/MI.cpp
+  mmio/MI.hpp
+  mmio/Interrupt.cpp
+  MMIO.cpp
+  MMIO.hpp
+  RSP.cpp
+  RSP.hpp
+  rsp/decode.cpp
+  rsp/instructions.cpp)
 
 target_include_directories(n64-core PRIVATE . .. ../../ mmio)
-target_link_libraries(n64-core PUBLIC n64-cpu)
+target_link_libraries(n64-core PUBLIC n64-cpu parallel-rdp)
diff --git a/src/core/n64/core/Cpu.cpp b/src/core/n64/core/Cpu.cpp
index 8c45adc3..a0b74715 100644
--- a/src/core/n64/core/Cpu.cpp
+++ b/src/core/n64/core/Cpu.cpp
@@ -1,6 +1,6 @@
-#include <Cpu.hpp>
-#include <MI.hpp>
-#include <Interrupt.hpp>
+#include <n64/core/Cpu.hpp>
+#include <n64/core/mmio/MI.hpp>
+#include <n64/core/mmio/Interrupt.hpp>
 #include <util.hpp>
 
 namespace natsukashii::n64::core {
@@ -49,22 +49,22 @@ void FireException(Registers& regs, ExceptionCode code, int cop, s64 pc) {
 
   regs.cop0.status.exl = true;
   regs.cop0.cause.copError = cop;
-  regs.cop0.cause.exceptionCode = code;
+  regs.cop0.cause.exceptionCode = static_cast<u8>(code);
 
   if(regs.cop0.status.bev) {
     util::panic("BEV bit set!\n");
   } else {
     switch(code) {
-      case Interrupt: case TLBModification:
-      case AddressErrorLoad: case AddressErrorStore:
-      case InstructionBusError: case DataBusError:
-      case Syscall: case Breakpoint:
-      case ReservedInstruction: case CoprocessorUnusable:
-      case Overflow: case Trap:
-      case FloatingPointError: case Watch:
+      case ExceptionCode::Interrupt: case ExceptionCode::TLBModification:
+      case ExceptionCode::AddressErrorLoad: case ExceptionCode::AddressErrorStore:
+      case ExceptionCode::InstructionBusError: case ExceptionCode::DataBusError:
+      case ExceptionCode::Syscall: case ExceptionCode::Breakpoint:
+      case ExceptionCode::ReservedInstruction: case ExceptionCode::CoprocessorUnusable:
+      case ExceptionCode::Overflow: case ExceptionCode::Trap:
+      case ExceptionCode::FloatingPointError: case ExceptionCode::Watch:
         regs.SetPC((s64)((s32)0x80000180));
         break;
-      case TLBLoad: case TLBStore:
+      case ExceptionCode::TLBLoad: case ExceptionCode::TLBStore:
         if(old_exl || regs.cop0.tlbError == INVALID) {
           regs.SetPC((s64)((s32)0x80000180));
         } else if(Is64BitAddressing(regs.cop0, regs.cop0.badVaddr)) {
@@ -73,14 +73,14 @@ void FireException(Registers& regs, ExceptionCode code, int cop, s64 pc) {
           regs.SetPC((s64)((s32)0x80000000));
         }
         break;
-      default: util::panic("Unhandled exception! {}\n", code);
+      default: util::panic("Unhandled exception! {}\n", static_cast<u8>(code));
     }
   }
 }
 
 inline void HandleInterrupt(Registers& regs) {
   if(ShouldServiceInterrupt(regs)) {
-    FireException(regs, Interrupt, 0, regs.pc);
+    FireException(regs, ExceptionCode::Interrupt, 0, regs.pc);
   }
 }
 
@@ -89,9 +89,9 @@ void Cpu::Step(Mem& mem) {
   regs.prevDelaySlot = regs.delaySlot;
   regs.delaySlot = false;
 
-  CheckCompareInterrupt(mem.mmio.mi);
+  CheckCompareInterrupt(mem.mmio.mi, regs);
 
-  u32 instruction = mem.Read(regs, regs.pc, regs.pc);
+  u32 instruction = mem.Read<u32>(regs, regs.pc, regs.pc);
 
   HandleInterrupt(regs);
 
diff --git a/src/core/n64/core/MMIO.hpp b/src/core/n64/core/MMIO.hpp
index 2f8fdff3..fad4eec4 100644
--- a/src/core/n64/core/MMIO.hpp
+++ b/src/core/n64/core/MMIO.hpp
@@ -1,6 +1,8 @@
 #pragma once
-#include <mmio/VI.hpp>
-#include <mmio/MI.hpp>
+#include <n64/core/mmio/VI.hpp>
+#include <n64/core/mmio/MI.hpp>
+#include <n64/core/RSP.hpp>
+#include <n64/core/RDP.hpp>
 
 namespace natsukashii::n64::core {
 struct Mem;
@@ -10,6 +12,8 @@ struct MMIO {
   MMIO() = default;
   VI vi;
   MI mi;
+  RSP rsp;
+  RDP rdp;
 
   u32 Read(u32);
   void Write(Mem&, Registers& regs, u32, u32);
diff --git a/src/core/n64/core/Mem.cpp b/src/core/n64/core/Mem.cpp
index bb92f79a..4b79a55a 100644
--- a/src/core/n64/core/Mem.cpp
+++ b/src/core/n64/core/Mem.cpp
@@ -47,6 +47,8 @@ inline bool MapVAddr(Registers& regs, TLBAccessType accessType, u32 vaddr, u32&
     default:
       util::panic("Should never end up in default case in map_vaddr! ({:08X})\n", vaddr);
   }
+
+  return false;
 }
 
 template <class T, bool tlb>
@@ -72,16 +74,13 @@ T Mem::Read(Registers& regs, u32 vaddr, s64 pc) {
     case 0x80000000 ... 0xFFFFFFFF: case 0x1FC00800 ... 0x7FFFFFFF: return 0;
     default: util::panic("Unimplemented {}-bit read at address {:08X} (PC = {:016X})\n", sizeof(T) * 8, paddr, regs.pc);
   }
+  return 0;
 }
 
-template u8 Mem::Read<u8, true>(Registers& regs, u32 vaddr, s64 pc);
-template u16 Mem::Read<u16, true>(Registers& regs, u32 vaddr, s64 pc);
-template u32 Mem::Read<u32, true>(Registers& regs, u32 vaddr, s64 pc);
-template u64 Mem::Read<u64, true>(Registers& regs, u32 vaddr, s64 pc);
-template u8 Mem::Read<u8, false>(Registers& regs, u32 vaddr, s64 pc);
-template u16 Mem::Read<u16, false>(Registers& regs, u32 vaddr, s64 pc);
-template u32 Mem::Read<u32, false>(Registers& regs, u32 vaddr, s64 pc);
-template u64 Mem::Read<u64, false>(Registers& regs, u32 vaddr, s64 pc);
+template u8 Mem::Read<u8>(Registers& regs, u32 vaddr, s64 pc);
+template u16 Mem::Read<u16>(Registers& regs, u32 vaddr, s64 pc);
+template u32 Mem::Read<u32>(Registers& regs, u32 vaddr, s64 pc);
+template u64 Mem::Read<u64>(Registers& regs, u32 vaddr, s64 pc);
 
 template <class T, bool tlb>
 void Mem::Write(Registers& regs, u32 vaddr, T val, s64 pc) {
@@ -108,12 +107,8 @@ void Mem::Write(Registers& regs, u32 vaddr, T val, s64 pc) {
   }
 }
 
-template void Mem::Write<u8, true>(Registers& regs, u32 vaddr, u8 val, s64 pc);
-template void Mem::Write<u16, true>(Registers& regs, u32 vaddr, u16 val, s64 pc);
-template void Mem::Write<u32, true>(Registers& regs, u32 vaddr, u32 val, s64 pc);
-template void Mem::Write<u64, true>(Registers& regs, u32 vaddr, u64 val, s64 pc);
-template void Mem::Write<u8, false>(Registers& regs, u32 vaddr, u8 val, s64 pc);
-template void Mem::Write<u16, false>(Registers& regs, u32 vaddr, u16 val, s64 pc);
-template void Mem::Write<u32, false>(Registers& regs, u32 vaddr, u32 val, s64 pc);
-template void Mem::Write<u64, false>(Registers& regs, u32 vaddr, u64 val, s64 pc);
+template void Mem::Write<u8>(Registers& regs, u32 vaddr, u8 val, s64 pc);
+template void Mem::Write<u16>(Registers& regs, u32 vaddr, u16 val, s64 pc);
+template void Mem::Write<u32>(Registers& regs, u32 vaddr, u32 val, s64 pc);
+template void Mem::Write<u64>(Registers& regs, u32 vaddr, u64 val, s64 pc);
 }
\ No newline at end of file
diff --git a/src/core/n64/core/Mem.hpp b/src/core/n64/core/Mem.hpp
index f6e39ff2..7d928eaf 100644
--- a/src/core/n64/core/Mem.hpp
+++ b/src/core/n64/core/Mem.hpp
@@ -13,11 +13,12 @@ struct Mem {
   [[nodiscard]] auto GetRDRAM() -> u8* {
     return rdram.data();
   }
-  template <class T, bool tlb>
+  template <class T, bool tlb = true>
   T Read(Registers&, u32, s64);
-  template <class T, bool tlb>
+  template <class T, bool tlb = true>
   void Write(Registers&, u32, T, s64);
 private:
+  friend struct Cpu;
   friend struct RSP;
   MMIO mmio;
   std::vector<u8> cart, rdram, sram;
diff --git a/src/core/n64/core/RDP.cpp b/src/core/n64/core/RDP.cpp
index a967366a..517c0b15 100644
--- a/src/core/n64/core/RDP.cpp
+++ b/src/core/n64/core/RDP.cpp
@@ -1,8 +1,8 @@
-#include <RDP.hpp>
+#include <n64/core/RDP.hpp>
 #include <util.hpp>
-#include <RSP.hpp>
+#include <n64/core/RSP.hpp>
 #include <../../../frontend/ParallelRDPWrapper.hpp>
-#include <Interrupt.hpp>
+#include <n64/core/mmio/Interrupt.hpp>
 
 namespace natsukashii::n64::core {
 static const int cmd_lens[64] = {
@@ -12,11 +12,12 @@ static const int cmd_lens[64] = {
   2, 2, 2, 2, 2, 2, 2, 2, 2, 2,  2,  2,  2,  2,  2,  2
 };
 
-u32 RDP::Read(u32 addr) {
+auto RDP::Read(u32 addr) const -> u32{
   switch(addr) {
     case 0x0410000C: return dpc.status.raw;
     default: util::panic("Unhandled DP Command Registers read (addr: {:08X})\n", addr);
   }
+  return 0;
 }
 
 void RDP::Write(u32 addr, u32 val) {
diff --git a/src/core/n64/core/RDP.hpp b/src/core/n64/core/RDP.hpp
index b86449bf..9926ca1f 100644
--- a/src/core/n64/core/RDP.hpp
+++ b/src/core/n64/core/RDP.hpp
@@ -53,7 +53,7 @@ struct RDP {
 
   RDP() = default;
 
-  u32 Read(u32 addr);
+  auto Read(u32 addr) const -> u32;
   void Write(u32 addr, u32 val);
   void StatusWrite(u32 val);
   void RunCommand(MI& mi, Registers& regs, RSP& rsp);
diff --git a/src/core/n64/core/RSP.cpp b/src/core/n64/core/RSP.cpp
index 70294de7..2888f85e 100644
--- a/src/core/n64/core/RSP.cpp
+++ b/src/core/n64/core/RSP.cpp
@@ -1,7 +1,7 @@
-#include <RSP.hpp>
+#include <n64/core/RSP.hpp>
 #include <util.hpp>
 #include <n64/core/Mem.hpp>
-#include "Interrupt.hpp"
+#include <n64/core/mmio/Interrupt.hpp>
 
 namespace natsukashii::n64::core {
 void RSP::StepRSP(MI& mi, Registers& regs, RDP& rdp) {
@@ -15,7 +15,7 @@ void RSP::StepRSP(MI& mi, Registers& regs, RDP& rdp) {
   }
 }
 
-u32 RSP::Read(u32 addr) {
+auto RSP::Read(u32 addr) const -> u32{
   switch (addr) {
     case 0x04040000: return spDMASPAddr.raw & 0xFFFFF8;
     case 0x04040004: return spDMADRAMAddr.raw & 0x1FF8;
@@ -26,6 +26,7 @@ u32 RSP::Read(u32 addr) {
     case 0x04080000: return pc & 0xFFF;
     default: util::panic("Unimplemented SP register read %08X\n", addr);
   }
+  return 0;
 }
 
 template <bool isDRAMdest>
diff --git a/src/core/n64/core/RSP.hpp b/src/core/n64/core/RSP.hpp
index a83203f9..fe36162a 100644
--- a/src/core/n64/core/RSP.hpp
+++ b/src/core/n64/core/RSP.hpp
@@ -1,6 +1,6 @@
 #pragma once
-#include <mmio/MI.hpp>
-#include <RDP.hpp>
+#include <n64/core/mmio/MI.hpp>
+#include <n64/core/RDP.hpp>
 #include <n64/memory_regions.hpp>
 
 namespace natsukashii::n64::core {
@@ -107,7 +107,7 @@ struct Registers;
 struct RSP {
   RSP() = default;
   void StepRSP(MI& mi, Registers& regs, RDP& rdp);
-  u32 Read(u32 addr);
+  auto Read(u32 addr) const -> u32;
   void Write(Mem& mem, Registers& regs, u32 addr, u32 value);
   void Exec(MI& mi, Registers& regs, RDP& rdp, u32 instr);
   SPStatus spStatus{.raw = 1};
@@ -156,7 +156,7 @@ struct RSP {
     }
     return val;
   }
-private:
+
   void add(u32 instr);
   void addi(u32 instr);
   void and_(u32 instr);
@@ -186,7 +186,7 @@ private:
   void vsar(u32 instr);
   void mfc0(RDP& rdp, u32 instr);
   void mtc0(MI& mi, Registers& regs, RDP& rdp, u32 instr);
-
+private:
   inline void branch(u16 address, bool cond) {
     if(cond) {
       nextPC = address & 0xFFF;
diff --git a/src/core/n64/core/mmio/MI.cpp b/src/core/n64/core/mmio/MI.cpp
index 8292636d..1b6af136 100644
--- a/src/core/n64/core/mmio/MI.cpp
+++ b/src/core/n64/core/mmio/MI.cpp
@@ -12,7 +12,7 @@ MI::MI() {
   miMode = 0;
 }
 
-u32 MI::Read(u32 paddr) {
+auto MI::Read(u32 paddr) const -> u32 {
   switch(paddr & 0xF) {
     case 0x0: return miMode & 0x3FF;
     case 0x4: return MI_VERSION_REG;
@@ -20,6 +20,7 @@ u32 MI::Read(u32 paddr) {
     case 0xC: return miIntrMask.raw & 0x3F;
     default: util::panic("Unhandled MI[%08X] read\n", paddr);
   }
+  return 0;
 }
 
 void MI::Write(Registers& regs, u32 paddr, u32 val) {
diff --git a/src/core/n64/core/mmio/MI.hpp b/src/core/n64/core/mmio/MI.hpp
index 39bd332d..7948973f 100644
--- a/src/core/n64/core/mmio/MI.hpp
+++ b/src/core/n64/core/mmio/MI.hpp
@@ -20,7 +20,7 @@ struct Registers;
 
 struct MI {
   MI();
-  u32 Read(u32);
+  [[nodiscard]] auto Read(u32) const -> u32;
   void Write(Registers& regs, u32, u32);
 
   u32 miMode;
diff --git a/src/core/n64/core/mmio/VI.cpp b/src/core/n64/core/mmio/VI.cpp
index 2f99a5ae..1e01da24 100644
--- a/src/core/n64/core/mmio/VI.cpp
+++ b/src/core/n64/core/mmio/VI.cpp
@@ -18,7 +18,7 @@ VI::VI () {
   cyclesPerHalfline = 1000;
 }
 
-u32 VI::Read(u32 paddr) {
+u32 VI::Read(u32 paddr) const {
   switch(paddr) {
     case 0x04400000: return status.raw;
     case 0x04400004: return origin;
@@ -37,6 +37,7 @@ u32 VI::Read(u32 paddr) {
     default:
       util::panic("Unimplemented VI[%08X] read\n", paddr);
   }
+  return 0;
 }
 
 void VI::Write(MI& mi, Registers& regs, u32 paddr, u32 val) {
diff --git a/src/core/n64/core/mmio/VI.hpp b/src/core/n64/core/mmio/VI.hpp
index fd544668..1f7da506 100644
--- a/src/core/n64/core/mmio/VI.hpp
+++ b/src/core/n64/core/mmio/VI.hpp
@@ -65,7 +65,7 @@ struct Registers;
 
 struct VI {
   VI();
-  u32 Read(u32);
+  [[nodiscard]] u32 Read(u32) const;
   void Write(MI&, Registers&, u32, u32);
   VIScale xscale{}, yscale{};
   VIVideo hvideo{}, vvideo{};
diff --git a/src/core/n64/core/rsp/decode.cpp b/src/core/n64/core/rsp/decode.cpp
index 021aaaba..c3df6300 100644
--- a/src/core/n64/core/rsp/decode.cpp
+++ b/src/core/n64/core/rsp/decode.cpp
@@ -1,24 +1,25 @@
-#include <RSP.hpp>
+#include <n64/core/RSP.hpp>
 #include <util.hpp>
+#include <n64/core/cpu/Registers.hpp>
 
 namespace natsukashii::n64::core {
 inline void special(RSP& rsp, u32 instr) {
   u8 mask = instr & 0x3f;
   switch(mask) {
-    case 0x00: rsp_sll(rsp, instr); break;
-    case 0x04: rsp_sllv(rsp, instr); break;
-    case 0x08: rsp_jr(rsp, instr); break;
+    case 0x00: rsp.sll(instr); break;
+    case 0x04: rsp.sllv(instr); break;
+    case 0x08: rsp.jr(instr); break;
     case 0x0C:
     case 0x0D:
       rsp.spStatus.halt = true;
       rsp.spStatus.broke = true;
       break;
     case 0x20: case 0x21:
-      rsp_add(rsp, instr);
+      rsp.add(instr);
       break;
-    case 0x24: rsp_and_(rsp, instr); break;
-    case 0x25: rsp_or_(rsp, instr); break;
-    case 0x27: rsp_nor(rsp, instr); break;
+    case 0x24: rsp.and_(instr); break;
+    case 0x25: rsp.or_(instr); break;
+    case 0x27: rsp.nor(instr); break;
     default: util::panic("Unhandled RSP special instruction %d %d\n", (mask >> 3) & 7, mask & 7);
   }
 }
@@ -26,8 +27,8 @@ inline void special(RSP& rsp, u32 instr) {
 inline void regimm(RSP& rsp, u32 instr) {
   u8 mask = ((instr >> 16) & 0x1F);
   switch(mask) {
-    case 0x00: rsp_b(rsp, instr, (s32)rsp.gpr[RS(instr)] < 0); break;
-    case 0x01: rsp_b(rsp, instr, (s32)rsp.gpr[RS(instr)] >= 0); break;
+    case 0x00: rsp.b(instr, (s32)rsp.gpr[RS(instr)] < 0); break;
+    case 0x01: rsp.b(instr, (s32)rsp.gpr[RS(instr)] >= 0); break;
     default: util::panic("Unhandled RSP regimm instruction %d %d\n", (mask >> 3) & 3, mask & 7);
   }
 }
@@ -35,7 +36,7 @@ inline void regimm(RSP& rsp, u32 instr) {
 inline void lwc2(RSP& rsp, u32 instr) {
   u8 mask = (instr >> 11) & 0x1F;
   switch(mask) {
-    case 0x04: rsp_lqv(rsp, instr); break;
+    case 0x04: rsp.lqv(instr); break;
     default: util::panic("Unhandled RSP LWC2 %d %d\n", (mask >> 3) & 3, mask & 7);
   }
 }
@@ -43,7 +44,7 @@ inline void lwc2(RSP& rsp, u32 instr) {
 inline void swc2(RSP& rsp, u32 instr) {
   u8 mask = (instr >> 11) & 0x1F;
   switch(mask) {
-    case 0x04: rsp_sqv(rsp, instr); break;
+    case 0x04: rsp.sqv(instr); break;
     default: util::panic("Unhandled RSP SWC2 %d %d\n", (mask >> 3) & 3, mask & 7);
   }
 }
@@ -54,15 +55,15 @@ inline void cop2(RSP& rsp, u32 instr) {
   switch(mask) {
     case 0x00:
       switch(mask_sub) {
-        case 0x02: rsp_cfc2(rsp, instr); break;
-        default: logfatal("Unhandled RSP COP2 sub %d %d\n", (mask_sub >> 3) & 3, mask_sub & 3);
+        case 0x02: rsp.cfc2(instr); break;
+        default: util::panic("Unhandled RSP COP2 sub %d %d\n", (mask_sub >> 3) & 3, mask_sub & 3);
       }
       break;
-    case 0x13: rsp_vabs(rsp, instr); break;
-    case 0x1D: rsp_vsar(rsp, instr); break;
-    case 0x21: rsp_veq(rsp, instr); break;
-    case 0x22: rsp_vne(rsp, instr); break;
-    case 0x33: rsp_vmov(rsp, instr); break;
+    case 0x13: rsp.vabs(instr); break;
+    case 0x1D: rsp.vsar(instr); break;
+    case 0x21: rsp.veq(instr); break;
+    case 0x22: rsp.vne(instr); break;
+    case 0x33: rsp.vmov(instr); break;
     default: util::panic("Unhandled RSP COP2 %d %d\n", (mask >> 3) & 7, mask & 7);
   }
 }
@@ -70,8 +71,8 @@ inline void cop2(RSP& rsp, u32 instr) {
 inline void cop0(MI& mi, Registers& regs, RSP& rsp, RDP& rdp, u32 instr) {
   u8 mask = (instr >> 21) & 0x1F;
   switch(mask) {
-    case 0x00: rsp_mfc0(rsp, rdp, instr); break;
-    case 0x04: rsp_mtc0(mi, regs, rsp, rdp, instr); break;
+    case 0x00: rsp.mfc0(rdp, instr); break;
+    case 0x04: rsp.mtc0(mi, regs, rdp, instr); break;
     default: util::panic("Unhandled RSP COP0 %d %d\n", (mask >> 3) & 3, mask & 7);
   }
 }
@@ -81,22 +82,22 @@ void RSP::Exec(MI &mi, Registers &regs, RDP &rdp, u32 instr) {
   switch(mask) {
     case 0x00: special(*this, instr); break;
     case 0x01: regimm(*this, instr); break;
-    case 0x02: rsp_j(instr); break;
-    case 0x03: rsp_jal(instr); break;
-    case 0x04: rsp_b(instr, gpr[RT(instr)] == gpr[RS(instr)]); break;
-    case 0x05: rsp_b(instr, gpr[RT(instr)] != gpr[RS(instr)]); break;
-    case 0x07: rsp_b(instr, gpr[RS(instr)] > 0); break;
-    case 0x08: case 0x09: rsp_addi(instr); break;
-    case 0x0C: rsp_andi(instr); break;
-    case 0x0D: rsp_ori(instr); break;
-    case 0x0F: rsp_lui(instr); break;
+    case 0x02: j(instr); break;
+    case 0x03: jal(instr); break;
+    case 0x04: b(instr, gpr[RT(instr)] == gpr[RS(instr)]); break;
+    case 0x05: b(instr, gpr[RT(instr)] != gpr[RS(instr)]); break;
+    case 0x07: b(instr, gpr[RS(instr)] > 0); break;
+    case 0x08: case 0x09: addi(instr); break;
+    case 0x0C: andi(instr); break;
+    case 0x0D: ori(instr); break;
+    case 0x0F: lui(instr); break;
     case 0x10: cop0(mi, regs, *this, rdp, instr); break;
     case 0x12: cop2(*this, instr); break;
-    case 0x21: rsp_lh(instr); break;
-    case 0x23: rsp_lw(instr); break;
-    case 0x28: rsp_sb(instr); break;
-    case 0x29: rsp_sh(instr); break;
-    case 0x2B: rsp_sw(instr); break;
+    case 0x21: lh(instr); break;
+    case 0x23: lw(instr); break;
+    case 0x28: sb(instr); break;
+    case 0x29: sh(instr); break;
+    case 0x2B: sw(instr); break;
     case 0x32: lwc2(*this, instr); break;
     case 0x3A: swc2(*this, instr); break;
     default: util::panic("Unhandled RSP instruction %d %d\n", (mask >> 3) & 7, mask & 7);
diff --git a/src/core/n64/core/rsp/instructions.cpp b/src/core/n64/core/rsp/instructions.cpp
index cb3699d7..b6b623fd 100644
--- a/src/core/n64/core/rsp/instructions.cpp
+++ b/src/core/n64/core/rsp/instructions.cpp
@@ -20,7 +20,7 @@ inline void ReleaseSemaphore(RSP& rsp) {
   rsp.semaphore = false;
 }
 
-inline u32 GetCop0Reg(RSP& rsp, RDP& rdp, u8 index) {
+inline auto GetCop0Reg(RSP& rsp, RDP& rdp, u8 index) -> u32{
   switch(index) {
     case 4: return rsp.spStatus.raw;
     case 5: return rsp.spStatus.dmaFull;
@@ -29,6 +29,7 @@ inline u32 GetCop0Reg(RSP& rsp, RDP& rdp, u8 index) {
     case 11: return rdp.dpc.status.raw;
     default: util::panic("Unhandled RSP COP0 register read at index {}\n", index);
   }
+  return 0;
 }
 
 inline void SetCop0Reg(MI& mi, Registers& regs, RSP& rsp, RDP& rdp, u8 index, u32 val) {
@@ -49,7 +50,7 @@ inline void SetCop0Reg(MI& mi, Registers& regs, RSP& rsp, RDP& rdp, u8 index, u3
       break;
     case 9:
       rdp.dpc.end = val & 0xFFFFF8;
-      rdp.RunCommand(mi, regs, rdp, rsp);
+      rdp.RunCommand(mi, regs, rsp);
       break;
     case 11: rdp.StatusWrite(val); break;
     default: util::panic("Unhandled RSP COP0 register write at index {}\n", index);
diff --git a/src/core/util.hpp b/src/core/util.hpp
index f3301c29..c524c31b 100644
--- a/src/core/util.hpp
+++ b/src/core/util.hpp
@@ -39,6 +39,7 @@ constexpr void info(const std::string& fmt, Args... args) {
 
 template <typename T, bool HToBE = false>
 auto GetSwapFunc(T num) -> T {
+  static_assert(sizeof(T) == 2 || sizeof(T) == 4 || sizeof(T) == 8, "GetSwapFunc used with invalid size!");
   if constexpr(sizeof(T) == 2) {
     if constexpr(HToBE) {
       return htobe16(num);
@@ -59,17 +60,26 @@ auto GetSwapFunc(T num) -> T {
 
 template <typename T>
 inline T ReadAccess(u8* data, u32 index) {
-  static_assert(sizeof(T) != 2 || sizeof(T) != 4 || sizeof(T) != 8);
-  T result = 0;
-  memcpy(&result, &data[index], sizeof(T));
-  return GetSwapFunc<T>(result);
+  if constexpr(sizeof(T) == 1) {
+    return data[index];
+  } else {
+    static_assert(sizeof(T) == 2 || sizeof(T) == 4 || sizeof(T) == 8);
+    T result = 0;
+    memcpy(&result, &data[index], sizeof(T));
+    return GetSwapFunc<T>(result);
+  }
 }
 
 template <typename T>
 inline void WriteAccess(u8* data, u32 index, T val) {
-  static_assert(sizeof(T) != 2 || sizeof(T) != 4 || sizeof(T) != 8);
-  T temp = GetSwapFunc<T, true>(val);
-  memcpy(&data[index], &temp, sizeof(T));
+  if constexpr(sizeof(T) == 1) {
+    data[index] = val;
+    return;
+  } else {
+    static_assert(sizeof(T) == 2 || sizeof(T) == 4 || sizeof(T) == 8);
+    T temp = GetSwapFunc<T, true>(val);
+    memcpy(&data[index], &temp, sizeof(T));
+  }
 }
 
 #define Z64 0x80371240
diff --git a/src/frontend/ParallelRDPWrapper.hpp b/src/frontend/ParallelRDPWrapper.hpp
index 9574aed8..18c71ed3 100644
--- a/src/frontend/ParallelRDPWrapper.hpp
+++ b/src/frontend/ParallelRDPWrapper.hpp
@@ -1,9 +1,9 @@
 #pragma once
-#include "n64/Core.hpp"
-#include "parallel-rdp-standalone/vulkan/wsi.hpp"
+#include <n64/Core.hpp>
+#include <parallel-rdp-standalone/vulkan/wsi.hpp>
 #include <SDL2/SDL.h>
-#include "n64/core/mmio/VI.hpp"
-#include "BaseCore.hpp"
+#include <n64/core/mmio/VI.hpp>
+#include <BaseCore.hpp>
 
 enum class Platform : bool {
   SDL, Qt
diff --git a/src/frontend/sdl/CMakeLists.txt b/src/frontend/sdl/CMakeLists.txt
index 9c550106..91217e3f 100644
--- a/src/frontend/sdl/CMakeLists.txt
+++ b/src/frontend/sdl/CMakeLists.txt
@@ -15,7 +15,5 @@ FetchContent_Declare(
 )
 FetchContent_MakeAvailable(argparse)
 
-add_subdirectory(../../../external temp)
-
-target_include_directories(natsukashii-sdl PRIVATE . ../../core ../../core/gb ../../core/n64 ../../core/n64/core ../../core/n64/core/cpu/registers)
-target_link_libraries(natsukashii-sdl PRIVATE cores argparse::argparse SDL2 parallel-rdp)
+target_include_directories(natsukashii-sdl PRIVATE . ../../core)
+target_link_libraries(natsukashii-sdl PRIVATE cores argparse::argparse SDL2)
diff --git a/src/frontend/sdl/Frontend.cpp b/src/frontend/sdl/Frontend.cpp
index 35117a41..2fec5146 100644
--- a/src/frontend/sdl/Frontend.cpp
+++ b/src/frontend/sdl/Frontend.cpp
@@ -1,5 +1,4 @@
 #include <Frontend.hpp>
-#include <gb/Core.hpp>
 #include <n64/Core.hpp>
 #include <volk.h>
 #include "../ParallelRDPWrapper.hpp"
@@ -15,13 +14,7 @@ App::~App() {
 App::App(const std::string& rom, const std::string& selectedCore) {
   SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO | SDL_VIDEO_VULKAN);
 
-  if(selectedCore == "gb") {
-    window = SDL_CreateWindow("natukashii", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 800, 600, SDL_WINDOW_RESIZABLE);
-    renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED);
-    SDL_RenderSetLogicalSize(renderer, 160, 144);
-    windowID = SDL_GetWindowID(window);
-    g_Core = std::make_unique<gb::core::Core>(rom);
-  } else if(selectedCore == "n64") {
+  if(selectedCore == "n64") {
     window = SDL_CreateWindow("natukashii", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 800, 600, SDL_WINDOW_RESIZABLE | SDL_WINDOW_VULKAN);
     windowID = SDL_GetWindowID(window);
     if(volkInitialize() != VK_SUCCESS) {
@@ -29,7 +22,7 @@ App::App(const std::string& rom, const std::string& selectedCore) {
     }
     g_Core = std::make_unique<n64::core::Core>(Platform::SDL, rom);
   } else {
-    util::panic("Unimplemented core!");
+    util::panic("Unimplemented core \"{}\"!", selectedCore);
   }
 }
 
diff --git a/src/frontend/sdl/Frontend.hpp b/src/frontend/sdl/Frontend.hpp
index e8442219..a32282c8 100644
--- a/src/frontend/sdl/Frontend.hpp
+++ b/src/frontend/sdl/Frontend.hpp
@@ -2,7 +2,6 @@
 #define SDL_MAIN_HANDLED
 #include <SDL2/SDL.h>
 #include <SDL2/SDL_vulkan.h>
-#include <BaseCore.hpp>
 #include <string>
 #include <memory>
 #include <util.hpp>