diff --git a/platform/src/CLIParser.cpp b/platform/src/CLIParser.cpp
index 4508c0f..ed72201 100644
--- a/platform/src/CLIParser.cpp
+++ b/platform/src/CLIParser.cpp
@@ -88,23 +88,27 @@ CLIParser::CLIParser(int argc, char *argv[])
         auto log_file_name   = vm_["log-file"].as<std::string>();
         scc::init_logging(scc::LogConfig()
         .logFileName(log_file_name)
-        .logLevel(static_cast<scc::log>(dbg_level))
+        .logLevel(dbg_level)
         .logFilterRegex(log_regex)
         .coloredOutput(colored_output)
         );
     } else {
         scc::init_logging(scc::LogConfig()
-        .logLevel(static_cast<scc::log>(dbg_level))
+        .logLevel(dbg_level)
         .logFilterRegex(log_regex)
         .coloredOutput(colored_output)
         );
     }
+    LOGGER(DEFAULT)::reporting_level()=static_cast<logging::log_level>(dbg_level);
+    LOGGER(DEFAULT)::print_time()=false;
+    LOGGER(DEFAULT)::print_severity()=false;
+    LOG_OUTPUT(DEFAULT)::ostream() = &std::cout;
 }
 
 void CLIParser::build() {
     // clang-format off
     desc.add_options()
-            ("help,h", "Print help message")
+            ("help,h",        "Print help message")
             ("verbose,v",      po::value<unsigned>()->implicit_value(3), "Sets logging verbosity")
             ("Verbose,V",      po::value<unsigned>()->default_value(logging::INFO), "Debug output level as with --verbose but print non-colored")
             ("debug-level,D",  po::value<scc::log>(), "Debug output level (textual) as with --verbose")
@@ -113,13 +117,15 @@ void CLIParser::build() {
             ("disass,d",       po::value<std::string>()->implicit_value(""), "Enables disassembly")
             ("elf,l",          po::value<std::string>(), "ELF file to load")
             ("gdb-port,g",     po::value<unsigned short>()->default_value(0), "enable gdb server and specify port to use")
-            ("ir-dump", "dump the intermediate representation")
+            ("ir-dump",        "dump the intermediate representation")
             ("quantum",        po::value<unsigned>(), "SystemC quantum time in ns")
             ("reset,r",        po::value<std::string>(), "reset address")
             ("trace-level,t",  po::value<unsigned>()->default_value(0), "enable tracing, or combination of 1=signals and 2=TX text, 4=TX compressed text, 6=TX in SQLite")
             ("trace-default-on", "enables tracing for all unspecified modules")
             ("trace-file",     po::value<std::string>()->default_value("system"), "set th ename of the trace file")
             ("max_time,m",     po::value<std::string>(), "maximum time to run")
+            ("backend",        po::value<std::string>()->default_value("tcc"), "ISS engine to use")
+            ("heart-beat,b",   "Enable heartbeat printing")
             ("config-file,c",  po::value<std::string>()->default_value(""), "read configuration from file")
             ("dump-config,dc", po::value<std::string>()->default_value(""), "dump configuration to file file");
     // clang-format on
diff --git a/platform/src/sc_main.cpp b/platform/src/sc_main.cpp
index 600be7f..6e63a7e 100644
--- a/platform/src/sc_main.cpp
+++ b/platform/src/sc_main.cpp
@@ -36,6 +36,7 @@
 
 #include <scc/configurable_tracer.h>
 #include <scc/configurer.h>
+#include <scc/perf_estimator.h>
 #include <scc/report.h>
 #include <scc/scv_tr_db.h>
 #include <scc/tracer.h>
@@ -50,6 +51,7 @@
 #include <fstream>
 #include <sstream>
 
+using namespace sc_core;
 using namespace sysc;
 namespace po = boost::program_options;
 
@@ -67,6 +69,8 @@ int sc_main(int argc, char *argv[]) {
     ///////////////////////////////////////////////////////////////////////////
     // CLI argument parsing & logging setup
     ///////////////////////////////////////////////////////////////////////////
+    scc::stream_redirection cout_redir(std::cout, scc::log::INFO);
+    scc::stream_redirection cerr_redir(std::cerr, scc::log::ERROR);
     CLIParser parser(argc, argv);
     if (!parser.is_valid()) return ERROR_IN_COMMAND_LINE;
     ///////////////////////////////////////////////////////////////////////////
@@ -90,6 +94,7 @@ int sc_main(int argc, char *argv[]) {
     ///////////////////////////////////////////////////////////////////////////
     // instantiate top level
     ///////////////////////////////////////////////////////////////////////////
+    auto estimator = scc::make_unique<scc::perf_estimator>(parser.is_set("heart-beat") ? 10_us : SC_ZERO_TIME);
     auto i_system = scc::make_unique<sysc::system>("i_system");
     ///////////////////////////////////////////////////////////////////////////
     // add non-implemented 'enableTracing' properties
@@ -106,6 +111,7 @@ int sc_main(int argc, char *argv[]) {
     ///////////////////////////////////////////////////////////////////////////
     // overwrite config with command line settings
     ///////////////////////////////////////////////////////////////////////////
+    cfg.set_value("i_system.i_hifive1.i_fe310.i_core_complex.backend", parser.get<std::string>("backend"));
 	cfg.set_value("i_system.i_hifive1.i_fe310.i_core_complex.gdb_server_port", parser.get<unsigned short>("gdb-port"));
     cfg.set_value("i_system.i_hifive1.i_fe310.i_core_complex.dump_ir", parser.is_set("dump-ir"));
     if (parser.is_set("elf"))
@@ -116,7 +122,7 @@ int sc_main(int argc, char *argv[]) {
             cfg.set_value("i_system.i_hifive1.i_fe310.i_core_complex.elf_file", args[0]);
     }
     if (parser.is_set("quantum"))
-        tlm::tlm_global_quantum::instance().set(sc_core::sc_time(parser.get<unsigned>("quantum"), sc_core::SC_NS));
+        tlm::tlm_global_quantum::instance().set(sc_time(parser.get<unsigned>("quantum"), SC_NS));
     if (parser.is_set("reset")) {
         auto str = parser.get<std::string>("reset");
         uint64_t start_address = str.find("0x") == 0 ? std::stoull(str.substr(2), nullptr, 16) : std::stoull(str, nullptr, 10);
@@ -137,12 +143,22 @@ int sc_main(int argc, char *argv[]) {
     ///////////////////////////////////////////////////////////////////////////
     try {
         if (parser.is_set("max_time")) {
-            sc_core::sc_start(scc::parse_from_string(parser.get<std::string>("max_time")));
+            sc_start(scc::parse_from_string(parser.get<std::string>("max_time")));
         } else
-            sc_core::sc_start();
-        if (!sc_core::sc_end_of_simulation_invoked()) sc_core::sc_stop();
-    } catch (sc_core::sc_report &rep) {
-        sc_core::sc_report_handler::get_handler()(rep, sc_core::SC_DISPLAY | sc_core::SC_STOP);
+            sc_start();
+    } catch(sc_report& e) {
+        SCCERR() << "Caught sc_report exception during simulation: " << e.what() << ":" << e.get_msg();
+    } catch(std::exception& e) {
+        SCCERR() << "Caught exception during simulation: " << e.what();
+    } catch(...) {
+        SCCERR() << "Caught unspecified exception during simulation";
     }
-    return 0;
+    if(sc_is_running()) {
+        SCCERR() << "Simulation timeout!"; // calls sc_stop
+    }
+    auto errcnt = sc_report_handler::get_count(SC_ERROR);
+    auto warncnt = sc_report_handler::get_count(SC_WARNING);
+    SCCINFO() << "Finished, there were " << errcnt << " error" << (errcnt == 1 ? "" : "s") << " and " << warncnt << " warning"
+              << (warncnt == 1 ? "" : "s");
+    return errcnt + warncnt;
 }
diff --git a/riscv b/riscv
index edeff7a..71b9768 160000
--- a/riscv
+++ b/riscv
@@ -1 +1 @@
-Subproject commit edeff7add807ab0e524b5d05b16defe58be2a867
+Subproject commit 71b976811b43557fa0610aef01989d54df841a2c
diff --git a/scc b/scc
index 0145853..529cb29 160000
--- a/scc
+++ b/scc
@@ -1 +1 @@
-Subproject commit 01458535fa10e3bd5794d50df82ce94f214bfbe1
+Subproject commit 529cb29a483e00bc2bfc1fba25dbbf595b077235