altered the way callbacks work and finished tape

StartBackend.bat

@@ -1,4 +1,7 @@
 @echo off
+set savefolder=savedata
+if not exist %savefolder% mkdir %savefolder%
+set saveloc=%cd%\%savefolder%\
 cd "sim"
-luajit "main.lua"
+luajit "main.lua" %saveloc%
 pause

sim/main.lua

@@ -1,9 +1,15 @@
+
+OPT_SAVE_DIR = arg[1] or error("must specify save location")
+OPT_SAVE_DIR = OPT_SAVE_DIR:gsub("\\$", "").."\\"
+print("Save location set to \""..OPT_SAVE_DIR.."\"")
+
 dofile("simulation.lua")
 dofile("group.lua")
 dofile("wire.lua")
 dofile("gatedef.lua")
 dofile("gate.lua")
 dofile("port.lua")
+dofile("save.lua")
 
 OPT_TICK_ENABLED = true
 OPT_TICK_TIME = 0
@@ -108,6 +114,8 @@ while 1 do
 		local data = {}
 		local i = 1
 		line = line:gsub(";;", "; ;")
+		line = line:gsub(";$", "; ")
+		
 		for str in string.gmatch(line, "([^;]+)") do
 			data[i] = str or ""
 			i = i + 1
@@ -264,6 +272,11 @@ while 1 do
 				sim:queuegateinput(gate, argv)
 
 				i = i+2+argc
+			elseif data[i] == "SAVE" then
+				print("saving all data")
+				logicsave()
+			else
+				print("invalid data "..data[i])
 			end
 
 			i = i + 1

sim/utility.lua

@@ -65,3 +65,4 @@ function tobitstring(num, len)
 	
 	return bitstring
 end
+