fix: draw from bottom to start

lua/CC Tweaked/tutel/tutel-host.lua

@@ -182,8 +182,20 @@ function handleMessages(side, channel, replyChannel, message, dist)
 end
 registerEventListener("modem_message", handleMessages)
 
+local logOffset = 0
+
+-- to-do: add key handlers
 function handleKey(key, isHeld)
     log.info("key pressed (%d)", key)
+
+    if key == 265 then
+        logOffset = logOffset - 1
+    elseif key == 264 then
+        logOffset = logOffset + 1
+    end
+
+    if logOffset < 0 then logOffset = 0 end
+    if logOffset >= #log.buffer then  logOffset = #log.buffer - 1 end
 end
 registerEventListener("key", handleKey)
 
@@ -232,7 +244,7 @@ function updateScreen()
             local entry = log.buffer[i]
             local format = logTypes[entry.type]
 
-            term.setCursorPos(0, startY - 1 + i)
+            term.setCursorPos(0, endY - i)
 
             local prevColourBg = term.getBackgroundColour()
             local prevColourFg = term.getTextColour()
@@ -273,6 +285,6 @@ end
 ]]
 sendToAll("SCAN", { ["hostChannel"] = HOST_CHANNEL })
 while true do
-    pollEvents()
     updateScreen()
+    pollEvents()
 end