diff --git a/CMakeLists.txt b/CMakeLists.txt
index 84028de..92f4351 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -66,7 +66,8 @@ set_target_properties(${PROJECT_NAME} PROPERTIES
 
 if(SystemC_FOUND)
 	add_library(${PROJECT_NAME}_sc src/sysc/core_complex.cpp)
-	target_compile_definitions(${PROJECT_NAME}_sc PUBLIC WITH_SYSTEMC) 
+	target_compile_definitions(${PROJECT_NAME}_sc PUBLIC WITH_SYSTEMC)
+    target_compile_definitions(${PROJECT_NAME}_sc PRIVATE CORE_${CORE_NAME})
 	target_include_directories(${PROJECT_NAME}_sc PUBLIC ../incl ${SystemC_INCLUDE_DIRS} ${CCI_INCLUDE_DIRS})
 	
 	if(SCV_FOUND)   
@@ -87,7 +88,7 @@ endif()
 project(tgc-sim)
 add_executable(${PROJECT_NAME} src/main.cpp)
 # This sets the include directory for the reference project. This is the -I flag in gcc.
-
+target_compile_definitions(${PROJECT_NAME} PRIVATE CORE_${CORE_NAME})
 if(WITH_LLVM)
 	target_compile_definitions(${PROJECT_NAME} PRIVATE WITH_LLVM)
 	target_link_libraries(${PROJECT_NAME} PUBLIC ${llvm_libs})
diff --git a/gen_input/TGFS.core_desc b/gen_input/TGFS.core_desc
index 56b3674..ba2a63f 100644
--- a/gen_input/TGFS.core_desc
+++ b/gen_input/TGFS.core_desc
@@ -2,7 +2,7 @@ import "CoreDSL-Instruction-Set-Description/RV32I.core_desc"
 import "CoreDSL-Instruction-Set-Description/RVM.core_desc"
 import "CoreDSL-Instruction-Set-Description/RVC.core_desc"
 
-Core TGF_B provides RV32I {
+Core TGC_B provides RV32I {
 	architectural_state {
         unsigned XLEN=32;
         unsigned PCLEN=32;
@@ -14,7 +14,7 @@ Core TGF_B provides RV32I {
 	}
 }
 
-Core TGF_C provides RV32I, RV32M, RV32IC {
+Core TGC_C provides RV32I, RV32M, RV32IC {
     architectural_state {
         unsigned XLEN=32;
         unsigned PCLEN=32;
@@ -25,3 +25,13 @@ Core TGF_C provides RV32I, RV32M, RV32IC {
         unsigned PGMASK = 0xfff; //PGSIZE-1
     }
 }
+
+Core TGC_D provides RV32I, RV32M, RV32IC {
+    architectural_state {
+        unsigned XLEN=32;
+        unsigned PCLEN=32;
+        // definitions for the architecture wrapper
+        //                    XL    ZYXWVUTSRQPONMLKJIHGFEDCBA
+        unsigned MISA_VAL = 0b01000000000000000001000100000100;
+    }
+}
diff --git a/incl/iss/arch/.gitignore b/incl/iss/arch/.gitignore
index 52ab34f..52334de 100644
--- a/incl/iss/arch/.gitignore
+++ b/incl/iss/arch/.gitignore
@@ -1 +1 @@
-/tgf_b.h
+/tgc_*.h
diff --git a/incl/iss/arch/tgf_c.h b/incl/iss/arch/tgc_c.h
similarity index 91%
rename from incl/iss/arch/tgf_c.h
rename to incl/iss/arch/tgc_c.h
index 8facd1b..bf4f958 100644
--- a/incl/iss/arch/tgf_c.h
+++ b/incl/iss/arch/tgc_c.h
@@ -30,8 +30,8 @@
  *
  *******************************************************************************/
 
-#ifndef _TGF_C_H_
-#define _TGF_C_H_
+#ifndef _TGC_C_H_
+#define _TGC_C_H_
 
 #include <array>
 #include <iss/arch/traits.h>
@@ -41,11 +41,11 @@
 namespace iss {
 namespace arch {
 
-struct tgf_c;
+struct tgc_c;
 
-template <> struct traits<tgf_c> {
+template <> struct traits<tgc_c> {
 
-    constexpr static char const* const core_type = "TGF_C";
+    constexpr static char const* const core_type = "TGC_C";
     
     static constexpr std::array<const char*, 35> reg_names{
         {"X0", "X1", "X2", "X3", "X4", "X5", "X6", "X7", "X8", "X9", "X10", "X11", "X12", "X13", "X14", "X15", "X16", "X17", "X18", "X19", "X20", "X21", "X22", "X23", "X24", "X25", "X26", "X27", "X28", "X29", "X30", "X31", "PC", "NEXT_PC", "PRIV"}};
@@ -53,7 +53,7 @@ template <> struct traits<tgf_c> {
     static constexpr std::array<const char*, 35> reg_aliases{
         {"X0", "X1", "X2", "X3", "X4", "X5", "X6", "X7", "X8", "X9", "X10", "X11", "X12", "X13", "X14", "X15", "X16", "X17", "X18", "X19", "X20", "X21", "X22", "X23", "X24", "X25", "X26", "X27", "X28", "X29", "X30", "X31", "PC", "NEXT_PC", "PRIV"}};
 
-    enum constants {XLEN=32, PCLEN=32, MISA_VAL=0b01000000000000000001000100000100, CSR_SIZE=4096, fence=0, fencei=1, fencevmal=2, fencevmau=3, eei_aligned_addresses=1, MUL_LEN=64};
+    enum constants {XLEN=32, PCLEN=32, MISA_VAL=0b01000000000000000001000100000100, PGSIZE=0x1000, PGMASK=0b111111111111, CSR_SIZE=4096, fence=0, fencei=1, fencevmal=2, fencevmau=3, eei_aligned_addresses=1, MUL_LEN=64};
 
     constexpr static unsigned FP_REGS_SIZE = 0;
 
@@ -179,15 +179,15 @@ template <> struct traits<tgf_c> {
     };
 };
 
-struct tgf_c: public arch_if {
+struct tgc_c: public arch_if {
 
-    using virt_addr_t = typename traits<tgf_c>::virt_addr_t;
-    using phys_addr_t = typename traits<tgf_c>::phys_addr_t;
-    using reg_t =  typename traits<tgf_c>::reg_t;
-    using addr_t = typename traits<tgf_c>::addr_t;
+    using virt_addr_t = typename traits<tgc_c>::virt_addr_t;
+    using phys_addr_t = typename traits<tgc_c>::phys_addr_t;
+    using reg_t =  typename traits<tgc_c>::reg_t;
+    using addr_t = typename traits<tgc_c>::addr_t;
 
-    tgf_c();
-    ~tgf_c();
+    tgc_c();
+    ~tgc_c();
 
     void reset(uint64_t address=0) override;
 
@@ -208,9 +208,9 @@ struct tgf_c: public arch_if {
     inline uint64_t stop_code() { return interrupt_sim; }
 
     inline phys_addr_t v2p(const iss::addr_t& addr){
-        if (addr.space != traits<tgf_c>::MEM || addr.type == iss::address_type::PHYSICAL ||
+        if (addr.space != traits<tgc_c>::MEM || addr.type == iss::address_type::PHYSICAL ||
                 addr_mode[static_cast<uint16_t>(addr.access)&0x3]==address_type::PHYSICAL) {
-            return phys_addr_t(addr.access, addr.space, addr.val&traits<tgf_c>::addr_mask);
+            return phys_addr_t(addr.access, addr.space, addr.val&traits<tgc_c>::addr_mask);
         } else
             return virt2phys(addr);
     }
@@ -223,7 +223,7 @@ struct tgf_c: public arch_if {
 
 protected:
 #pragma pack(push, 1)
-    struct TGF_C_regs { 
+    struct TGC_C_regs { 
         uint32_t X0 = 0; 
         uint32_t X1 = 0; 
         uint32_t X2 = 0; 
@@ -275,4 +275,4 @@ protected:
 
 }
 }            
-#endif /* _TGF_C_H_ */
+#endif /* _TGC_C_H_ */
diff --git a/src/iss/.gitignore b/src/iss/.gitignore
index 9e3228c..c62e4a7 100644
--- a/src/iss/.gitignore
+++ b/src/iss/.gitignore
@@ -1 +1 @@
-/tgf_b.cpp
+/tgc_*.cpp
diff --git a/src/iss/tgf_c.cpp b/src/iss/tgc_c.cpp
similarity index 84%
rename from src/iss/tgf_c.cpp
rename to src/iss/tgc_c.cpp
index 68f8cb7..d95b1da 100644
--- a/src/iss/tgf_c.cpp
+++ b/src/iss/tgc_c.cpp
@@ -32,26 +32,26 @@
 
 #include "util/ities.h"
 #include <util/logging.h>
-#include <iss/arch/tgf_c.h>
+#include <iss/arch/tgc_c.h>
 #include <cstdio>
 #include <cstring>
 #include <fstream>
 
 using namespace iss::arch;
 
-constexpr std::array<const char*, 35>    iss::arch::traits<iss::arch::tgf_c>::reg_names;
-constexpr std::array<const char*, 35>    iss::arch::traits<iss::arch::tgf_c>::reg_aliases;
-constexpr std::array<const uint32_t, 38> iss::arch::traits<iss::arch::tgf_c>::reg_bit_widths;
-constexpr std::array<const uint32_t, 38> iss::arch::traits<iss::arch::tgf_c>::reg_byte_offsets;
+constexpr std::array<const char*, 35>    iss::arch::traits<iss::arch::tgc_c>::reg_names;
+constexpr std::array<const char*, 35>    iss::arch::traits<iss::arch::tgc_c>::reg_aliases;
+constexpr std::array<const uint32_t, 38> iss::arch::traits<iss::arch::tgc_c>::reg_bit_widths;
+constexpr std::array<const uint32_t, 38> iss::arch::traits<iss::arch::tgc_c>::reg_byte_offsets;
 
-tgf_c::tgf_c() {
+tgc_c::tgc_c() {
     reg.icount = 0;
 }
 
-tgf_c::~tgf_c() = default;
+tgc_c::~tgc_c() = default;
 
-void tgf_c::reset(uint64_t address) {
-    for(size_t i=0; i<traits<tgf_c>::NUM_REGS; ++i) set_reg(i, std::vector<uint8_t>(sizeof(traits<tgf_c>::reg_t),0));
+void tgc_c::reset(uint64_t address) {
+    for(size_t i=0; i<traits<tgc_c>::NUM_REGS; ++i) set_reg(i, std::vector<uint8_t>(sizeof(traits<tgc_c>::reg_t),0));
     reg.PC=address;
     reg.NEXT_PC=reg.PC;
     reg.PRIV=0x3;
@@ -59,11 +59,11 @@ void tgf_c::reset(uint64_t address) {
     reg.icount=0;
 }
 
-uint8_t *tgf_c::get_regs_base_ptr() {
+uint8_t *tgc_c::get_regs_base_ptr() {
 	return reinterpret_cast<uint8_t*>(&reg);
 }
 
-tgf_c::phys_addr_t tgf_c::virt2phys(const iss::addr_t &pc) {
+tgc_c::phys_addr_t tgc_c::virt2phys(const iss::addr_t &pc) {
     return phys_addr_t(pc); // change logical address to physical address
 }
 
diff --git a/src/main.cpp b/src/main.cpp
index b932987..173d67c 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -36,10 +36,14 @@
 #include <boost/lexical_cast.hpp>
 #include <boost/program_options.hpp>
 #include <iss/arch/riscv_hart_m_p.h>
-#ifdef WITH_TGF_B
-#include <iss/arch/tgf_b.h>
+#ifdef CORE_TGC_C
+#include "iss/arch/tgc_c.h"
+using core_type = iss::arch::tgc_c;
+#endif
+#ifdef CORE_TGC_D
+#include "iss/arch/tgc_d.h"
+using core_type = iss::arch::tgc_d;
 #endif
-#include <iss/arch/tgf_c.h>
 #ifdef WITH_LLVM
 #include <iss/llvm/jit_helper.h>
 #endif
@@ -139,7 +143,7 @@ int main(int argc, char *argv[]) {
 #endif
             if (isa_opt == "tgf_c") {
             std::tie(cpu, vm) =
-                create_cpu<iss::arch::tgf_c>(clim["backend"].as<std::string>(), clim["gdb-port"].as<unsigned>());
+                create_cpu<core_type>(clim["backend"].as<std::string>(), clim["gdb-port"].as<unsigned>());
         } else {
             LOG(ERROR) << "Illegal argument value for '--isa': " << clim["isa"].as<std::string>() << std::endl;
             return 127;
@@ -179,7 +183,7 @@ int main(int argc, char *argv[]) {
         }
         uint64_t start_address = 0;
         if (clim.count("mem"))
-            vm->get_arch()->load_file(clim["mem"].as<std::string>(), iss::arch::traits<iss::arch::tgf_c>::MEM);
+            vm->get_arch()->load_file(clim["mem"].as<std::string>(), iss::arch::traits<core_type>::MEM);
         if (clim.count("elf"))
             for (std::string input : clim["elf"].as<std::vector<std::string>>()) {
                 auto start_addr = vm->get_arch()->load_file(input);
diff --git a/src/sysc/core_complex.cpp b/src/sysc/core_complex.cpp
index 9375997..bf90d2c 100644
--- a/src/sysc/core_complex.cpp
+++ b/src/sysc/core_complex.cpp
@@ -32,7 +32,14 @@
 
 #include "sysc/core_complex.h"
 #include "iss/arch/riscv_hart_m_p.h"
-#include "iss/arch/tgf_c.h"
+#ifdef CORE_TGC_C
+#include "iss/arch/tgc_c.h"
+using core_type = iss::arch::tgc_c;
+#endif
+#ifdef CORE_TGC_D
+#include "iss/arch/tgc_d.h"
+using core_type = iss::arch::tgc_d;
+#endif
 #include "iss/debugger/encoderdecoder.h"
 #include "iss/debugger/gdb_session.h"
 #include "iss/debugger/server.h"
@@ -59,7 +66,6 @@ namespace {
 iss::debugger::encoder_decoder encdec;
 }
 
-using core_type = iss::arch::tgf_c;
 
 namespace {
 
diff --git a/src/vm/interp/.gitignore b/src/vm/interp/.gitignore
index 821e3f0..89389b0 100644
--- a/src/vm/interp/.gitignore
+++ b/src/vm/interp/.gitignore
@@ -1 +1 @@
-/vm_tgf_b.cpp
+/vm_tgc_*.cpp
diff --git a/src/vm/interp/vm_tgf_c.cpp b/src/vm/interp/vm_tgc_c.cpp
similarity index 99%
rename from src/vm/interp/vm_tgf_c.cpp
rename to src/vm/interp/vm_tgc_c.cpp
index 8123d5e..80903c6 100644
--- a/src/vm/interp/vm_tgf_c.cpp
+++ b/src/vm/interp/vm_tgc_c.cpp
@@ -31,7 +31,7 @@
  *******************************************************************************/
 
 #include "../fp_functions.h"
-#include <iss/arch/tgf_c.h>
+#include <iss/arch/tgc_c.h>
 #include <iss/arch/riscv_hart_m_p.h>
 #include <iss/debugger/gdb_session.h>
 #include <iss/debugger/server.h>
@@ -50,7 +50,7 @@
 
 namespace iss {
 namespace interp {
-namespace tgf_c {
+namespace tgc_c {
 using namespace iss::arch;
 using namespace iss::debugger;
 
@@ -3542,8 +3542,8 @@ typename vm_base<ARCH>::virt_addr_t vm_impl<ARCH>::execute_inst(finish_cond_e co
 } // namespace mnrv32
 
 template <>
-std::unique_ptr<vm_if> create<arch::tgf_c>(arch::tgf_c *core, unsigned short port, bool dump) {
-    auto ret = new tgf_c::vm_impl<arch::tgf_c>(*core, dump);
+std::unique_ptr<vm_if> create<arch::tgc_c>(arch::tgc_c *core, unsigned short port, bool dump) {
+    auto ret = new tgc_c::vm_impl<arch::tgc_c>(*core, dump);
     if (port != 0) debugger::server<debugger::gdb_session>::run_server(ret, port);
     return std::unique_ptr<vm_if>(ret);
 }