diff --git a/app/application.cpp b/app/application.cpp
index 2f2648c..c6dca81 100644
--- a/app/application.cpp
+++ b/app/application.cpp
@@ -38,7 +38,7 @@ class EP9442Matrix {
         uint8_t tx1_oe :1;
         enum reg49_sel tx0_sel :1;
         enum reg49_sel tx1_sel :1;
-    } reg49 = {1, 1, true, true, reg49_sel::SECONDARY, reg49_sel::PRIMARY};
+    } reg49 = {0, 1, true, true, reg49_sel::PRIMARY, reg49_sel::SECONDARY};
 
     struct {
         uint8_t rx0_on :1;
@@ -112,22 +112,28 @@ public:
         Wire.begin(4, 5);
         Wire.setClock(300000);
         Wire.setClockStretchLimit(5*230);
-
+        if (0) {
         debugf("basic registers");
         // Disable RX on all inputs
         //delay(1000);
+
+        i2cWrite(0x64, 0x4a, 0x00);
+
         i2cWrite(0x64, 0x2d, 0x82);
         i2cWrite(0x64, 0x40, 0x00);
         i2cWrite(0x64, 0x41, 0x00);
         i2cWrite(0x64, 0x42, 0x3f);
         i2cWrite(0x64, 0x43, 0x01);
-        i2cWrite(0x64, 0x44, 0x43);
+        i2cWrite(0x64, 0x44, 0x40);
         i2cWrite(0x64, 0x45, 0x14);
         i2cWrite(0x64, 0x46, 0xe4);
         i2cWrite(0x64, 0x47, 0x80);
         i2cWrite(0x64, 0x48, 0x04);
         i2cWrite(0x64, 0x4b, 0b111111);
 
+        i2cWrite(0x64, 0x51, 0x00);
+        i2cWrite(0x64, 0x52, 0x00);
+
         i2cWrite(0x64, 0x4a, 0x00);
         i2cWrite(0x64, 0x4a, *(uint8_t*)&reg4a); // 0xff
         i2cWrite(0x64, 0x4a, 0x00);
@@ -150,10 +156,65 @@ public:
         debugf("updating routing...");
         updateRouting();
         debugf("done");
+        }
 
-        pollTimer.initializeMs(500, TimerDelegate(&EP9442Matrix::pollStatus, this)).start();
+        pinMode(0, OUTPUT);
+        digitalWrite(0, LOW);
+        delay(50);
+        digitalWrite(0, HIGH);
+        // ...let it boot
+        pollTimer.initializeMs(10000, TimerDelegate(&EP9442Matrix::finalizeInit, this)).start();
     }
 
+    void finalizeInit() {
+        Serial.println("Init end");
+        digitalWrite(0, LOW);
+        pollTimer.initializeMs(3000, TimerDelegate(&EP9442Matrix::pollStatus, this)).start();
+    }
+
+    void testOut2() {
+        reg4a.tx0_on = 0;
+        reg4a.tx1_on = 0;
+
+        reg49.tx0_oe = 0;
+        reg49.tx1_oe = 0;
+
+        i2cWrite(0x64, 0x4a, *(uint8_t*)&reg4a); // 0xff
+        updateRouting();
+
+        enableOutput(0);
+        delay(3);
+        enableOutput(1);
+    }
+
+    void enableOutput(uint8_t target) {
+        uint8_t err;
+        if (target == 0) {
+            reg4a.tx0_on = 1;
+        } else {
+            reg4a.tx1_on = 1;
+        }
+        i2cWrite(0x64, 0x4a, *(uint8_t*)&reg4a); // 0xff
+
+        delay(3);
+
+        if ((err = twi_writeTo(0x64, rxphy, sizeof(rxphy), true)) != 0) {
+            debugf("rx phy settings failed: %d", err);
+        }
+
+        if ((err = twi_writeTo(0x64, txphy, sizeof(txphy), true)) != 0) {
+            debugf("tx phy settings failed: %d", err);
+        }
+
+        if (target == 0) {
+            reg49.tx0_oe = 1;
+        } else {
+            reg49.tx1_oe = 1;
+        }
+        updateRouting();
+    }
+
+
     void updateRouting() {
         uint8_t new_reg = *(uint8_t*)&reg49;
         i2cWrite(0x64, 0x49, new_reg);
@@ -244,7 +305,8 @@ public:
 
         // FIXME
         matrix.init();
-        matrix.init();
+        //matrix.init();
+        //matrix.testOut2();
         //matrix.init();
     }