diff --git a/Lua/classes/Monitor.lua b/Lua/classes/Monitor.lua
index bb4aaa8..52b2118 100644
--- a/Lua/classes/Monitor.lua
+++ b/Lua/classes/Monitor.lua
@@ -12,10 +12,12 @@ function Monitor:init(name, a)
 end
 
 function Monitor:read()
-    local raw = mainmemory.readbyterange(self.begin, self.len)
+    -- bizhawk has an off-by-one bug where this returns length + 1 bytes
+    local raw = mainmemory.readbyterange(self.begin, self.len-1)
     local bytes = {}
+    local begin = self.begin
     for k, v in pairs(raw) do
-        bytes[k] = v
+        bytes[k - begin] = v
     end
     return bytes
 end
diff --git a/Lua/test chests.lua b/Lua/test chests.lua
index 0f20e96..52aa31a 100755
--- a/Lua/test chests.lua	
+++ b/Lua/test chests.lua	
@@ -43,7 +43,7 @@ function read_ascii(addr, len)
     -- so we'll set up a table we can use ipairs() on
     local ordered_bytes = {}
     for a, v in pairs(bytes) do
-        ordered_bytes[tonumber(a, 16) + 1] = v
+        ordered_bytes[tonumber(a, 16) - begin + 1] = v
     end
 
     local seq = false