diff --git a/src/harptool.cpp b/src/harptool.cpp
index c3a61a37..ffceac46 100644
--- a/src/harptool.cpp
+++ b/src/harptool.cpp
@@ -207,7 +207,7 @@ int disasm_main(int argc, char **argv) {
 
 int emu_main(int argc, char **argv) {
   string archString("8w32/32/8/8"), imgFileName("a.out.bin");
-  bool showHelp, showStats, basicMachine;
+  bool showHelp, showStats, basicMachine, batch;
 
   /* Read the command line arguments. */
   CommandLineArgFlag          fh("-h", "--help", "", showHelp);
@@ -215,6 +215,7 @@ int emu_main(int argc, char **argv) {
   CommandLineArgSetter<string>fa("-a", "--arch", "", archString);
   CommandLineArgFlag          fs("-s", "--stats", "", showStats);
   CommandLineArgFlag          fb("-b", "--basic", "", basicMachine);
+  CommandLineArgFlag          fi("-i", "--batch", "", batch);
   
   CommandLineArg::readArgs(argc, argv);
 
@@ -240,7 +241,7 @@ int emu_main(int argc, char **argv) {
   Core core(arch, *dec, mu/*, ID in multicore implementations*/);
 
   RamMemDevice mem(imgFileName.c_str(), arch.getWordSize());
-  ConsoleMemDevice console(arch.getWordSize(), cout, core);
+  ConsoleMemDevice console(arch.getWordSize(), cout, core, batch);
   mu.attach(mem,     0);
   mu.attach(console, 1ll<<(arch.getWordSize()*8 - 1));
 
diff --git a/src/include/help.h b/src/include/help.h
index 1da55bff..9c495bbb 100644
--- a/src/include/help.h
+++ b/src/include/help.h
@@ -19,7 +19,8 @@ namespace HarpTools {
                   "  -c, --core <filename>    RAM image\n"
                   "  -a, --arch <arch string> Architecture string\n"
                   "  -s, --stats              Print stats on exit.\n"
-                  "  -b, --basic              Disable virtual memory.\n",
+                  "  -b, --basic              Disable virtual memory.\n"
+                  "  -i, --batch              Disable console input.\n",
       *asmHelp = "HARP Assembler command line arguments:\n"
                   "  -a, --arch <arch string>\n"
                   "  -o, --output <filename>\n",
diff --git a/src/include/mem.h b/src/include/mem.h
index 7ea8e5d0..79873658 100644
--- a/src/include/mem.h
+++ b/src/include/mem.h
@@ -55,7 +55,7 @@ namespace Harp {
   class Core;
   class ConsoleMemDevice : public MemDevice {
   public:
-    ConsoleMemDevice(Size wS, std::ostream &o, Core &core);
+    ConsoleMemDevice(Size wS, std::ostream &o, Core &core, bool batch = false);
     ~ConsoleMemDevice() {} 
 
     //virtual Size wordSize() const { return wordSize; }
diff --git a/src/mem.cpp b/src/mem.cpp
index 18446d6b..73b6f3ac 100644
--- a/src/mem.cpp
+++ b/src/mem.cpp
@@ -187,11 +187,15 @@ void *Harp::consoleInputThread(void* arg_vp) {
   exit(4);
 }
 
-ConsoleMemDevice::ConsoleMemDevice(Size wS, std::ostream &o, Core &core) : 
+ConsoleMemDevice::ConsoleMemDevice(Size wS, std::ostream &o, Core &core,
+                                   bool batch) : 
   wordSize(wS), output(o), core(core), cBuf()
 {
-  pthread_t *thread = new pthread_t;
-  pthread_create(thread, NULL, consoleInputThread, (void*)this);
+  // Create a console input thread if we are running in interactive mode.
+  if (!batch) {
+    pthread_t *thread = new pthread_t;
+    pthread_create(thread, NULL, consoleInputThread, (void*)this);
+  }
   pthread_mutex_init(&cBufLock, NULL);
 }
 
diff --git a/src/test/Makefile b/src/test/Makefile
index 9e69e374..bf9afbb0 100644
--- a/src/test/Makefile
+++ b/src/test/Makefile
@@ -1,6 +1,6 @@
 HARPLD  = ../harptool -L
 HARPAS  = ../harptool -A
-HARPEM  = ../harptool -E
+HARPEM  = ../harptool -E -i
 HARPDIS = ../harptool -D
 4BARCH  = 4b16/16/2/1