diff --git a/fpga/src/main/scala/arty100t/Configs.scala b/fpga/src/main/scala/arty100t/Configs.scala
index 20790e12..4a0fb293 100644
--- a/fpga/src/main/scala/arty100t/Configs.scala
+++ b/fpga/src/main/scala/arty100t/Configs.scala
@@ -22,12 +22,14 @@ class WithNoDesignKey extends Config((site, here, up) => {
 })
 
 class WithArty100TTweaks extends Config(
-  new chipyard.harness.WithAllClocksFromHarnessClockInstantiator ++
   new WithArty100TUARTTSI ++
   new WithArty100TDDRTL ++
   new WithNoDesignKey ++
+  new testchipip.WithUARTTSIClient ++
+  new chipyard.harness.WithSerialTLTiedOff ++
   new chipyard.harness.WithHarnessBinderClockFreqMHz(50) ++
   new chipyard.config.WithMemoryBusFrequency(50.0) ++
+  new chipyard.config.WithFrontBusFrequency(50.0) ++
   new chipyard.config.WithSystemBusFrequency(50.0) ++
   new chipyard.config.WithPeripheryBusFrequency(50.0) ++
   new chipyard.harness.WithAllClocksFromHarnessClockInstantiator ++
diff --git a/fpga/src/main/scala/arty100t/HarnessBinders.scala b/fpga/src/main/scala/arty100t/HarnessBinders.scala
index f6750d37..060e3d8d 100644
--- a/fpga/src/main/scala/arty100t/HarnessBinders.scala
+++ b/fpga/src/main/scala/arty100t/HarnessBinders.scala
@@ -21,29 +21,17 @@ import chipyard.iobinders.JTAGChipIO
 import testchipip._
 
 class WithArty100TUARTTSI(uartBaudRate: BigInt = 115200) extends OverrideHarnessBinder({
-  (system: CanHavePeripheryTLSerial, th: HasHarnessInstantiators, ports: Seq[ClockedIO[SerialIO]]) => {
+  (system: CanHavePeripheryUARTTSI, th: HasHarnessInstantiators, ports: Seq[UARTTSIIO]) => {
     implicit val p = chipyard.iobinders.GetSystemParameters(system)
+    require(ports.size <= 1)
+    val ath = th.asInstanceOf[LazyRawModuleImp].wrapper.asInstanceOf[Arty100THarness]
     ports.map({ port =>
-      val ath = th.asInstanceOf[LazyRawModuleImp].wrapper.asInstanceOf[Arty100THarness]
-      val freq = p(PeripheryBusKey).dtsFrequency.get
-      val bits = port.bits
-      port.clock := th.harnessBinderClock
-      val ram = TSIHarness.connectRAM(system.serdesser.get, bits, th.harnessBinderReset)
-      val uart_to_serial = Module(new UARTToSerial(
-        freq, UARTParams(0, initBaudRate=uartBaudRate)))
-      val serial_width_adapter = Module(new SerialWidthAdapter(
-        narrowW = 8, wideW = TSI.WIDTH))
-      serial_width_adapter.io.narrow.flipConnect(uart_to_serial.io.serial)
-
-      ram.module.io.tsi.flipConnect(serial_width_adapter.io.wide)
-
-      ath.io_uart_bb.bundle <> uart_to_serial.io.uart
-      ath.other_leds(1) := uart_to_serial.io.dropped
-
-      ath.other_leds(9) := ram.module.io.tsi2tl_state(0)
-      ath.other_leds(10) := ram.module.io.tsi2tl_state(1)
-      ath.other_leds(11) := ram.module.io.tsi2tl_state(2)
-      ath.other_leds(12) := ram.module.io.tsi2tl_state(3)
+      ath.io_uart_bb.bundle <> port.uart
+      ath.other_leds(1) := port.dropped
+      ath.other_leds(9) := port.tsi2tl_state(0)
+      ath.other_leds(10) := port.tsi2tl_state(1)
+      ath.other_leds(11) := port.tsi2tl_state(2)
+      ath.other_leds(12) := port.tsi2tl_state(3)
     })
   }
 })
diff --git a/generators/chipyard/src/main/scala/IOBinders.scala b/generators/chipyard/src/main/scala/IOBinders.scala
index 11dff842..d00067b4 100644
--- a/generators/chipyard/src/main/scala/IOBinders.scala
+++ b/generators/chipyard/src/main/scala/IOBinders.scala
@@ -414,9 +414,9 @@ class WithCustomBootPin extends OverrideIOBinder({
 class WithUARTTSIPunchthrough extends OverrideIOBinder({
   (system: CanHavePeripheryUARTTSI) => system.uart_tsi.map({ p =>
     val sys = system.asInstanceOf[BaseSubsystem]
-    val port = IO(new UARTPortIO(p.c))
-    port <> p
-    (Seq(port), Nil)
+    val uart_tsi = IO(new UARTTSIIO(p.uartParams))
+    uart_tsi <> p
+    (Seq(uart_tsi), Nil)
   }).getOrElse((Nil, Nil))
 })
 
diff --git a/generators/chipyard/src/main/scala/harness/HarnessBinders.scala b/generators/chipyard/src/main/scala/harness/HarnessBinders.scala
index 69d6f6d3..2c8a7a75 100644
--- a/generators/chipyard/src/main/scala/harness/HarnessBinders.scala
+++ b/generators/chipyard/src/main/scala/harness/HarnessBinders.scala
@@ -318,14 +318,16 @@ class WithSimTSIOverSerialTL extends OverrideHarnessBinder({
 })
 
 class WithSimUARTToUARTTSI extends OverrideHarnessBinder({
-  (system: CanHavePeripheryUARTTSI, th: HasHarnessInstantiators, ports: Seq[UARTPortIO]) => {
+  (system: CanHavePeripheryUARTTSI, th: HasHarnessInstantiators, ports: Seq[UARTTSIIO]) => {
     implicit val p = chipyard.iobinders.GetSystemParameters(system)
-    ports.map({ port =>
-      UARTAdapter.connect(Seq(port),
-        baudrate=port.c.initBaudRate,
+    require(ports.size <= 1)
+    ports.map { port => {
+      UARTAdapter.connect(Seq(port.uart),
+        baudrate=port.uartParams.initBaudRate,
         clockFrequency=th.getHarnessBinderClockFreqHz.toInt,
         forcePty=true)
-    })
+      assert(!port.dropped)
+    }}
   }
 })
 
diff --git a/generators/testchipip b/generators/testchipip
index 518a36af..e2ab39f2 160000
--- a/generators/testchipip
+++ b/generators/testchipip
@@ -1 +1 @@
-Subproject commit 518a36afc9b1a64d7007689824a258affd4daef3
+Subproject commit e2ab39f2777f92e8ebc467ebf9c7bf1974793e1e