diff --git a/dbt-rise-riscv b/dbt-rise-riscv
index 8a528fc..dab4c69 160000
--- a/dbt-rise-riscv
+++ b/dbt-rise-riscv
@@ -1 +1 @@
-Subproject commit 8a528fceadae055c02197e194d188bbd0f78a03d
+Subproject commit dab4c69f59e0f33b979ac43b40a29d6ec5c67d68
diff --git a/scc b/scc
index 82602d0..3f5d963 160000
--- a/scc
+++ b/scc
@@ -1 +1 @@
-Subproject commit 82602d000fa1ed177ad0872dd3f82298f411efbc
+Subproject commit 3f5d963ae0f7e83a340674d44c3a8e5125d221ef
diff --git a/src/CLIParser.cpp b/src/CLIParser.cpp
index f0ee526..0d3bbab 100644
--- a/src/CLIParser.cpp
+++ b/src/CLIParser.cpp
@@ -85,8 +85,8 @@ void CLIParser::build() {
                     "core or isa name to use for simulation, use '?' to get list")
             ("dump-ir",
                     "dump the intermediate representation")
-			("dump-structure", po::value<std::string>(),
-					"dump model structure to ELK file")
+            ("dump-structure", po::value<std::string>(),
+                    "dump model structure to ELK file")
             ("quantum", po::value<unsigned>()->default_value(100),
                     "SystemC quantum time in ns")
             ("reset,r", po::value<std::string>(),
@@ -99,6 +99,8 @@ void CLIParser::build() {
                     "set th ename of the trace file")
             ("max_time,m", po::value<std::string>(),
                     "maximum time to run")
+            ("parameter,p", po::value<std::vector<std::string>>(),
+                    "parameter to set, value has the form of <parm name>=<parm value>")
             ("config-file,c", po::value<std::string>()->default_value(""),
                     "read configuration from file")
             ("plugin,p", po::value<std::vector<std::string>>(),
diff --git a/src/sc_main.cpp b/src/sc_main.cpp
index 4830914..f432a30 100644
--- a/src/sc_main.cpp
+++ b/src/sc_main.cpp
@@ -73,18 +73,30 @@ int sc_main(int argc, char* argv[]) {
     ///////////////////////////////////////////////////////////////////////////
     scc::configurer cfg(parser.get<std::string>("config-file"));
     ///////////////////////////////////////////////////////////////////////////
+    // process CLI paramter settings
+    ///////////////////////////////////////////////////////////////////////////
+    if(parser.is_set("parameter"))
+        for(auto& p : parser.get<std::vector<std::string>>("parameter")) {
+            auto token = util::split(p, '=');
+            if(token.size() == 2)
+                cfg.set_value_from_str(token[0], token[1]);
+            else
+                SCCERR() << "Invalid parameter specification '" << p << "', should be '<param name>=<param_value>'";
+        }
+    ///////////////////////////////////////////////////////////////////////////
     // set up tracing & transaction recording
     ///////////////////////////////////////////////////////////////////////////
-
     std::unique_ptr<scc::configurable_tracer> tracer;
     if(auto trace_level = parser.get<unsigned>("trace-level")) {
         auto file_name = parser.get<std::string>("trace-file");
         auto trace_default_on = parser.is_set("trace-default-on");
+        auto enable_tx_trace = static_cast<bool>(trace_level & 0x2);
         cfg.set_value("scc_tracer.default_trace_enable", !parser.is_set("trace-default-off"));
         cfg.set_value("scc_tracer.tx_trace_type", static_cast<unsigned>(scc::tracer::file_type::FTR));
         cfg.set_value("scc_tracer.sig_trace_type", static_cast<unsigned>(scc::tracer::file_type::FST));
-        tracer = scc::make_unique<scc::configurable_tracer>(file_name, static_cast<bool>(trace_level & 0x2),
-                                                            static_cast<bool>(trace_level & 0x1));
+        tracer = scc::make_unique<scc::configurable_tracer>(file_name, enable_tx_trace, static_cast<bool>(trace_level & 0x1));
+        if(enable_tx_trace)
+            cfg.set_value(core_path + ".enable_instr_trace", true);
     }
     ///////////////////////////////////////////////////////////////////////////
     // instantiate top level