diff --git a/boot-qemu.py b/boot-qemu.py
index 7e91ba5..814022d 100755
--- a/boot-qemu.py
+++ b/boot-qemu.py
@@ -523,10 +523,12 @@ def __init__(self):
         self._default_kernel_path = Path('vmlinux')
         self._initrd_arch = self._qemu_arch = 'm68k'
         self._qemu_args += [
+            '-audio', 'none',
             '-cpu', 'm68040',
             '-M', 'q800',
             '-no-reboot',
         ]  # fmt: off
+        self.memory = '512m'
 
 
 class MIPSQEMURunner(QEMURunner):