diff --git a/modules/debug/ocemu-display.lua b/modules/debug/ocemu-display.lua
new file mode 100644
index 0000000..ccc75f6
--- /dev/null
+++ b/modules/debug/ocemu-display.lua
@@ -0,0 +1,7 @@
+s("ocemu display server",function()
+ while true do
+  if ev[1] == "display" then
+   component.invoke(component.list("ocemu")(),"log",ev[2] or "")
+  end
+ end
+end)
diff --git a/modules/debug/ocemu-heartbeat.lua b/modules/debug/ocemu-heartbeat.lua
new file mode 100644
index 0000000..1753748
--- /dev/null
+++ b/modules/debug/ocemu-heartbeat.lua
@@ -0,0 +1,9 @@
+_G.DEBUG=true
+s("heartbeat",function()
+ while true do
+  if _G.DEBUG then
+   component.invoke(component.list("ocemu")(),"log","heartbeat:"..tostring(computer.uptime()))
+  end
+  C.yield()
+ end
+end)