diff --git a/config/chips/U535_U545.chip b/config/chips/U535_U545.chip
index 84ca3c9..adc0560 100644
--- a/config/chips/U535_U545.chip
+++ b/config/chips/U535_U545.chip
@@ -11,4 +11,4 @@ bootrom_base 0x0bf90000
 bootrom_size 0x8000          // 32 KB
 option_base 0x0
 option_size 0x0
-flags none
+flags swo dualbank
diff --git a/config/chips/U55Fx_U5Gx.chip b/config/chips/U55Fx_U5Gx.chip
index 6c7eca7..b9c79b2 100644
--- a/config/chips/U55Fx_U5Gx.chip
+++ b/config/chips/U55Fx_U5Gx.chip
@@ -11,4 +11,4 @@ bootrom_base 0x0bf90000
 bootrom_size 0x8000          // 32 KB
 option_base 0x0
 option_size 0x0
-flags none
+flags swo dualbank
diff --git a/config/chips/U575_U585.chip b/config/chips/U575_U585.chip
index fa2fb86..6724d00 100644
--- a/config/chips/U575_U585.chip
+++ b/config/chips/U575_U585.chip
@@ -11,4 +11,4 @@ bootrom_base 0x0bf90000
 bootrom_size 0x10000         // 64 KB
 option_base 0x0
 option_size 0x0
-flags none
+flags swo dualbank
diff --git a/config/chips/U59x_U5Ax.chip b/config/chips/U59x_U5Ax.chip
index 6be2085..9b45a41 100644
--- a/config/chips/U59x_U5Ax.chip
+++ b/config/chips/U59x_U5Ax.chip
@@ -11,4 +11,4 @@ bootrom_base 0x0bf90000
 bootrom_size 0x8000          // 32 KB
 option_base 0x0
 option_size 0x0
-flags none
+flags swo dualbank