diff --git a/scripts/tdp b/scripts/tdp
index ec9009e..8fc4333 100755
--- a/scripts/tdp
+++ b/scripts/tdp
@@ -1,7 +1,12 @@
 #! /usr/bin/bash
 
-# Set up help text
+# Global vars/settings
 command_name=$(basename $0)
+rapl_base="/sys/class/powercap/intel-rapl:0"
+pl1_path="${rapl_base}/constraint_0_power_limit_uw"
+pl2_path="${rapl_base}/constraint_1_power_limit_uw"
+
+# Set up help text
 help_text="${command_name}: GDP Win 3 TDP management script
 
 This script checks and sets the TDP using intel_rapl
@@ -55,14 +60,33 @@ print_unknown () {
 }
 # End of help text
 
+# Conversion tools
+uw_to_w () {
+  if ! [[ $1 =~ ^-?[0-9]+$ ]]; then
+    exit
+  else
+    echo $(expr $1 / 1000000)
+  fi
+}
+
+w_to_uw () {
+  if ! [[ $1 =~ ^-?[0-9]+$ ]]; then
+    exit
+  else
+    echo $(expr $1 '*' 1000000)
+  fi
+}
+
 # Retrieves current TDP and prints it
 check_tdp () {
   if [[ "$@" == *"--detail"* ]] || [[ "$@" == *"-d"* ]]; then
-      echo "Placeholder"
-      echo "Extra placeholder"
+      local detailed=yes
+  fi
 
-  elif [ -z "$1" ]; then
-      echo "Placeholder"
+  if [ -z "$1" ]; then
+      echo "PL1 is $(uw_to_w 10000000)W" # Placeholder
+      if [ $detailed == "yes" ]; then
+        echo "PL2 is $(uw_to_w 12000000)W" # Placeholder
 
   elif [ "$1" == "--help" ]; then
     print_help "check"
@@ -72,7 +96,7 @@ check_tdp () {
   fi
 }
 
-# Sets TDP to number provided as first argument
+# Sets PL1 to number provided as first argument, and PL2 2W higher
 set_tdp () {
   if [ -z "$1" ]; then
     echo "Please specify wattage"
@@ -92,11 +116,11 @@ set_tdp () {
   else
     #PL1
     local watts=$1
-    local uwatts=$(expr $watts '*' 1000000)
+    local uwatts=$(w_to_uw $watts)
 
     #PL2
     local watts2=$(expr $watts + 2)
-    local uwatts2=$(expr $watts2 '*' 1000000)
+    local uwatts2=$(w_to_uw $watts2)
 
     echo $uwatts
     echo "PL1 is now ${watts}W (Long-term)"