diff --git a/src/main/kotlin/Main.kt b/src/main/kotlin/Main.kt
index 8b5e2df..c197c39 100644
--- a/src/main/kotlin/Main.kt
+++ b/src/main/kotlin/Main.kt
@@ -1,7 +1,9 @@
+import ch.qos.logback.classic.LoggerContext
 import com.thequux.mcpdp.core.CPU
 import com.thequux.mcpdp.loadAbs
 import com.thequux.mcpdp.peripheral.DL11
 import com.thequux.mcpdp.peripheral.MemBus
+import org.slf4j.LoggerFactory
 import java.io.File
 
 fun main(args: Array<String>) {
@@ -19,7 +21,7 @@ fun main(args: Array<String>) {
         cpu.runState = CPU.RunState.RUNNING
         cpu.pc = 0x80u
         val start = System.nanoTime()
-        val ninsn = cpu.run(600000000)
+        val ninsn = cpu.run(200000000)
         val end = System.nanoTime()
 
         System.err.println("Halted at 0${cpu.pc.toString(8)}")
@@ -29,5 +31,7 @@ fun main(args: Array<String>) {
         println("Exiting")
         console.stop()
     }
+    val loggerContext = LoggerFactory.getILoggerFactory() as LoggerContext
+    loggerContext.stop()
     System.exit(0)
 }
diff --git a/src/main/kotlin/com/thequux/mcpdp/core/CPU.kt b/src/main/kotlin/com/thequux/mcpdp/core/CPU.kt
index 46e8540..8ff021e 100644
--- a/src/main/kotlin/com/thequux/mcpdp/core/CPU.kt
+++ b/src/main/kotlin/com/thequux/mcpdp/core/CPU.kt
@@ -865,6 +865,7 @@ class CPU(val mbus: MemBus) {
             } else {
                 val pirqLvl = pirq.toInt() shr 1 and 7;
                 if (pirqLvl > psw_priority) {
+                    logger.debug("PIRQ{} trap to 0xA0", pirqLvl)
                     trap(0xA0u)
                 }
             }
@@ -906,7 +907,7 @@ class CPU(val mbus: MemBus) {
     }
 
     fun trap(vector: UShort) {
-//        logger.debug("Trap to {}", vector.toString(8))
+        logger.info("Trap to {}", vector.toString(8))
         val old_psw = psw
         // update PSW first so that this gets pushed to the
         psw = core.getw((vector + 2u).toUShort())
diff --git a/src/main/kotlin/com/thequux/mcpdp/util/DebugTools.kt b/src/main/kotlin/com/thequux/mcpdp/util/DebugTools.kt
index 5949ee7..bebeb85 100644
--- a/src/main/kotlin/com/thequux/mcpdp/util/DebugTools.kt
+++ b/src/main/kotlin/com/thequux/mcpdp/util/DebugTools.kt
@@ -108,7 +108,7 @@ class Disassembler(val core: VAddressSpace) {
                     0x0000 -> when (opcode) {
                         0x0000 -> fmt("HALT") // HALT
                         0x0001 -> fmt("WAIT")
-                        0x0002 -> fmt("WTI")
+                        0x0002 -> fmt("RTI")
                         0x0003 -> fmt("BPT")
                         0x0004 -> fmt("IOT")
                         0x0005 -> fmt("RESET")