diff --git a/assets/tbas/basic.js b/assets/basic.js
similarity index 96%
rename from assets/tbas/basic.js
rename to assets/basic.js
index fe6bcb6..998b262 100644
--- a/assets/tbas/basic.js
+++ b/assets/basic.js
@@ -238,7 +238,9 @@ let literalTypes = ["string", "number", "bool", "array"];
         BASIC variable table and return the literal value of the BasicVar; undefined will be returned if no such var exists.
 */
 let resolve = function(variable) {
-    if (literalTypes.includes(variable.troType) || variable.troType.startsWith("internal_"))
+    if (variable.troType === "internal_arrindexing_lazy")
+        return variable.troValue.arrValue;
+    else if (literalTypes.includes(variable.troType) || variable.troType.startsWith("internal_"))
         return variable.troValue;
     else if (variable.troType == "literal") {
         var basicVar = bStatus.vars[parseSigil(variable.troValue).sgName];
@@ -252,55 +254,55 @@ let resolve = function(variable) {
 let oneArg = function(lnum, args, action) {
     if (args.length != 1) throw lang.syntaxfehler(lnum, args.length + " arguments were given");
     var rsvArg0 = resolve(args[0]);
-    if (rsvArg0 === undefined) throw lang.refError(lnum, rsvArg0);
+    if (rsvArg0 === undefined) throw lang.refError(lnum, args[0]);
     return action(rsvArg0);
 }
 let oneArgNum = function(lnum, args, action) {
     if (args.length != 1) throw lang.syntaxfehler(lnum, args.length + " arguments were given");
     var rsvArg0 = resolve(args[0]);
-    if (rsvArg0 === undefined) throw lang.refError(lnum, rsvArg0);
-    if (isNaN(rsvArg0)) throw lang.illegalType(lnum, rsvArg0);
+    if (rsvArg0 === undefined) throw lang.refError(lnum, args[0]);
+    if (isNaN(rsvArg0)) throw lang.illegalType(lnum, args[0]);
     return action(rsvArg0);
 }
 let twoArg = function(lnum, args, action) {
     if (args.length != 2) throw lang.syntaxfehler(lnum, args.length + " arguments were given");
     var rsvArg0 = resolve(args[0]);
-    if (rsvArg0 === undefined) throw lang.refError(lnum, rsvArg0);
+    if (rsvArg0 === undefined) throw lang.refError(lnum, args[0]);
     var rsvArg1 = resolve(args[1]);
-    if (rsvArg1 === undefined) throw lang.refError(lnum, rsvArg1);
+    if (rsvArg1 === undefined) throw lang.refError(lnum, args[1]);
     return action(rsvArg0, rsvArg1);
 }
 let twoArgNum = function(lnum, args, action) {
     if (args.length != 2) throw lang.syntaxfehler(lnum, args.length + " arguments were given");
     var rsvArg0 = resolve(args[0]);
-    if (rsvArg0 === undefined) throw lang.refError(lnum, rsvArg0);
-    if (isNaN(rsvArg0)) throw lang.illegalType(lnum, rsvArg0);
+    if (rsvArg0 === undefined) throw lang.refError(lnum, args[0]);
+    if (isNaN(rsvArg0)) throw lang.illegalType(lnum, args[0]);
     var rsvArg1 = resolve(args[1]);
-    if (rsvArg1 === undefined) throw lang.refError(lnum, rsvArg1);
-    if (isNaN(rsvArg1)) throw lang.illegalType(lnum, rsvArg1);
+    if (rsvArg1 === undefined) throw lang.refError(lnum, args[1]);
+    if (isNaN(rsvArg1)) throw lang.illegalType(lnum, args[1]);
     return action(rsvArg0, rsvArg1);
 }
 let threeArg = function(lnum, args, action) {
     if (args.length != 3) throw lang.syntaxfehler(lnum, args.length + " arguments were given");
     var rsvArg0 = resolve(args[0]);
-    if (rsvArg0 === undefined) throw lang.refError(lnum, rsvArg0);
+    if (rsvArg0 === undefined) throw lang.refError(lnum, args[0]);
     var rsvArg1 = resolve(args[1]);
-    if (rsvArg1 === undefined) throw lang.refError(lnum, rsvArg1);
+    if (rsvArg1 === undefined) throw lang.refError(lnum, args[1]);
     var rsvArg2 = resolve(args[2]);
-    if (rsvArg2 === undefined) throw lang.refError(lnum, rsvArg2);
+    if (rsvArg2 === undefined) throw lang.refError(lnum, args[2]);
     return action(rsvArg0, rsvArg1, rsvArg2);
 }
 let threeArgNum = function(lnum, args, action) {
     if (args.length != 3) throw lang.syntaxfehler(lnum, args.length + " arguments were given");
     var rsvArg0 = resolve(args[0]);
-    if (rsvArg0 === undefined) throw lang.refError(lnum, rsvArg0);
-    if (isNaN(rsvArg0)) throw lang.illegalType(lnum, rsvArg0);
+    if (rsvArg0 === undefined) throw lang.refError(lnum, args[0]);
+    if (isNaN(rsvArg0)) throw lang.illegalType(lnum, args[0]);
     var rsvArg1 = resolve(args[1]);
-    if (rsvArg1 === undefined) throw lang.refError(lnum, rsvArg1);
-    if (isNaN(rsvArg1)) throw lang.illegalType(lnum, rsvArg1);
+    if (rsvArg1 === undefined) throw lang.refError(lnum, args[1]);
+    if (isNaN(rsvArg1)) throw lang.illegalType(lnum, args[1]);
     var rsvArg2 = resolve(args[2]);
-    if (rsvArg2 === undefined) throw lang.refError(lnum, rsvArg2);
-    if (isNaN(rsvArg2)) throw lang.illegalType(lnum, rsvArg2);
+    if (rsvArg2 === undefined) throw lang.refError(lnum, args[2]);
+    if (isNaN(rsvArg2)) throw lang.illegalType(lnum, args[2]);
     return action(rsvArg0, rsvArg1, rsvArg2);
 }
 let initBvars = function() {
@@ -319,7 +321,7 @@ bStatus.vars = initBvars(); // contains instances of BasicVars
 bStatus.consts = {"NIL":1}; Object.freeze(bStatus.consts);
 bStatus.defuns = {};
 bStatus.rnd = 0; // stores mantissa (23 bits long) of single precision floating point number
-bStatus.getArrayIndexFun = function(lnum, array) {
+bStatus.getArrayIndexFun = function(lnum, arrayName, array) {
     return function(lnum, args) {
         // TODO test 1-d array
         // NOTE: BASIC arrays are index in column-major order, which is OPPOSITE of C/JS/etc.
@@ -327,7 +329,7 @@ bStatus.getArrayIndexFun = function(lnum, array) {
         if (rsvArg0 === undefined) throw lang.refError(lnum, rsvArg0);
         if (isNaN(rsvArg0)) throw lang.illegalType(lnum, rsvArg0);
 
-        return array[rsvArg0];
+        return {arrValue: array[rsvArg0], arrObj: array, arrIndex: rsvArg0, arrName: arrayName}; //array[rsvArg0];
     };
 };
 bStatus.builtin = {
@@ -341,13 +343,27 @@ if no arg text were given (e.g. "10 NEXT"), args will have zero length
 "REM" : function(lnum, args) {},
 "=" : function(lnum, args) {
     if (args.length != 2) throw lang.syntaxfehler(lnum, args.length + " arguments were given");
-    var sigil = parseSigil(args[0].troValue);
+    var troValue = args[0].troValue;
+
     var rh = resolve(args[1]);
-    if (rh === undefined) throw lang.refError(lnum, args[1].troValue);
-    var type = sigil.sgType || JStoBASICtype(rh);
-    if (bStatus.consts[sigil.sgName]) throw lang.asgnOnConst(lnum, sigil.sgName);
-    bStatus.vars[sigil.sgName] = new BasicVar(rh, type);
-    return {asgnVarName: sigil.sgName, asgnValue: rh};
+    if (rh === undefined) throw lang.refError(lnum, "RH:"+args[1].troValue);
+
+    if (troValue.arrObj !== undefined) {
+        if (isNaN(rh)) throw lang.illegalType(lnum, rh);
+
+        troValue.arrObj[troValue.arrIndex] = rh;
+        return {asgnVarName: troValue.arrName, asgnValue: rh};
+    }
+    else {
+        var sigil = parseSigil(troValue);
+        var type = sigil.sgType || JStoBASICtype(rh);
+
+        if (bStatus.consts[sigil.sgName]) throw lang.asgnOnConst(lnum, sigil.sgName);
+
+        bStatus.vars[sigil.sgName] = new BasicVar(rh, type);
+        return {asgnVarName: sigil.sgName, asgnValue: rh};
+    }
+
 },
 "==" : function(lnum, args) {
     return twoArg(lnum, args, function(lh, rh) { return lh == rh; });
@@ -601,7 +617,7 @@ if no arg text were given (e.g. "10 NEXT"), args will have zero length
     if (asgnObj === undefined) throw  lang.syntaxfehler(lnum);
     if (!Array.isArray(asgnObj.asgnValue)) throw lang.illegalType(lnum, asgnObj);
 
-    let varname = asgnObj.asgnVarName
+    let varname = asgnObj.asgnVarName;
 
     // assign new variable
     // the var itself will have head of the array, and the head itself will be removed from the array
@@ -1499,6 +1515,7 @@ let JStoBASICtype = function(object) {
     else if (typeof object === "string" || object instanceof String) return "string";
     else if (object === undefined) return "null";
     else if (object.asgnVarName !== undefined) return "internal_assignment_object";
+    else if (object.arrValue !== undefined) return "internal_arrindexing_lazy";
     else throw "BasicIntpError: un-translatable object with typeof "+(typeof object)+",\ntoString = "+object+",\nentries = "+Object.entries(object);
 }
 let SyntaxTreeReturnObj = function(type, value, nextLine) {
@@ -1571,7 +1588,7 @@ bF._executeSyntaxTree = function(lnum, syntaxTree, recDepth) {
 
                 // TODO calling from bStatus.defuns
 
-                func = bStatus.getArrayIndexFun(lnum, someVar.bvLiteral);
+                func = bStatus.getArrayIndexFun(lnum, funcName, someVar.bvLiteral);
             }
             // call whatever the 'func' has whether it's builtin or we just made shit up right above
             try {
diff --git a/assets/bios/TBMBIOS.js b/assets/bios/TBMBIOS.js
index 3362740..f402b78 100644
--- a/assets/bios/TBMBIOS.js
+++ b/assets/bios/TBMBIOS.js
@@ -76,7 +76,7 @@ if (portNumber < 4) {
 }
 else {
     sys.mapRom(1);
-    let response = eval("let _appStub=function(exec_args){"+sys.romReadAll()+"};_appStub;")();
+    let response = eval("let basica=function(exec_args){"+sys.romReadAll()+"};basica;")();
 
     if (response !== 0) println("No ROM BASIC system halted");
 }
\ No newline at end of file
diff --git a/assets/bios/basicbios.js b/assets/bios/basicbios.js
index 9e41382..f5fbae3 100644
--- a/assets/bios/basicbios.js
+++ b/assets/bios/basicbios.js
@@ -18,4 +18,4 @@ Object.freeze(_BIOS);
 
 // load a BASIC rom
 sys.mapRom(1);
-eval("let _appStub=function(exec_args){"+sys.romReadAll()+"};_appStub;")();
\ No newline at end of file
+eval("let basicrom=function(exec_args){"+sys.romReadAll()+"};basicrom;")();
\ No newline at end of file
diff --git a/hp2640.kra b/hp2640.kra
index 5681544..7ac5d0d 100644
--- a/hp2640.kra
+++ b/hp2640.kra
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:f4cf87ec24d7ff20221145c216694a2d12d8b8989e4b6269b2b04679af27dd89
-size 240385
+oid sha256:51e05d19dfb769edd6a8fc3876e8004f9ff810471742ef652f9a6111eceaeb9f
+size 240505
diff --git a/hp2640.png b/hp2640.png
index abbc696..6e9ac7c 100644
Binary files a/hp2640.png and b/hp2640.png differ
diff --git a/src/net/torvald/tsvm/AppLoader.java b/src/net/torvald/tsvm/AppLoader.java
index 3703ea3..8a8d888 100644
--- a/src/net/torvald/tsvm/AppLoader.java
+++ b/src/net/torvald/tsvm/AppLoader.java
@@ -27,9 +27,9 @@ public class AppLoader {
 
 
         // val vm = VM(64.kB(), TheRealWorld(), arrayOf(GenericBios))
-        //VM vm = new VM(64 << 10, new TheRealWorld(), new VMProgramRom[]{GenericBios.INSTANCE});
+        VM vm = new VM(64 << 10, new TheRealWorld(), new VMProgramRom[]{GenericBios.INSTANCE});
         //VM vm = new VM(64 << 10, new TheRealWorld(), new VMProgramRom[]{BasicBios.INSTANCE, BasicRom.INSTANCE});
-        VM vm = new VM(64 << 10, new TheRealWorld(), new VMProgramRom[]{OEMBios.INSTANCE, BasicRom.INSTANCE});
+        //VM vm = new VM(64 << 10, new TheRealWorld(), new VMProgramRom[]{OEMBios.INSTANCE, BasicRom.INSTANCE});
         new LwjglApplication(new VMGUI(vm, appConfig), appConfig);
     }
 
diff --git a/src/net/torvald/tsvm/peripheral/VMProgramRom.kt b/src/net/torvald/tsvm/peripheral/VMProgramRom.kt
index d8f1e3e..c4f9f1b 100644
--- a/src/net/torvald/tsvm/peripheral/VMProgramRom.kt
+++ b/src/net/torvald/tsvm/peripheral/VMProgramRom.kt
@@ -53,7 +53,7 @@ object BasicRom : VMProgramRom {
     private val contents: ByteArray
 
     init {
-        val bytes = File("./assets/tbas/basic.js").readBytes()
+        val bytes = File("./assets/basic.js").readBytes()
         contents = bytes.sliceArray(0 until minOf(65536, bytes.size))
     }