2 files changed, 5 insertions, 2 deletions
diff --git a/sim/gdbstub.py b/sim/gdbstub.py
index c01a4a7..8d20f39 100644
--- a/sim/gdbstub.py
+++ b/sim/gdbstub.py
@@ -1,6 +1,7 @@
 import sys, socket
 
 cycles = None
+enable_tty = True
 start_halted = True
 
 def init():
@@ -77,7 +78,6 @@ def halt():
         elif data == b's':
             return 'step'
         else:
-            print('unhandled packet:', data, file=sys.stderr)
             out = b''
 
         reply(out)
diff --git a/sim/sim.py b/sim/sim.py
index b0a194a..189ecfc 100755
--- a/sim/sim.py
+++ b/sim/sim.py
@@ -280,12 +280,15 @@ mem_dumps = module_get('mem_dumps', [])
 if init := module_get('init'):
     init()
 
-exec_args = [verilated, '--headless', '--no-tty', '--dump-regs']
+exec_args = [verilated, '--headless', '--dump-regs']
 
 cycles = module_get('cycles', 1024)
 if cycles is not None:
     exec_args.extend(['--cycles', str(cycles)])
 
+if not module_get('enable_tty', False):
+    exec_args.append('--no-tty')
+
 for rng in mem_dumps:
     length = rng.stop - rng.start
     assert rng.start >= 0 and rng.stop > rng.start \