diff --git a/runner/index.html b/runner/index.html
index 64eeb9b..9fe9d54 100644
--- a/runner/index.html
+++ b/runner/index.html
@@ -6,7 +6,7 @@
     if (!('WebAssembly' in window)) {
       alert('you need a browser with wasm support enabled :(');
     }
-
+    
     function loadWebAssembly(filename, imports) {
       return fetch(filename)
         .then(response => response.arrayBuffer())
@@ -15,7 +15,7 @@
           imports = imports || {};
           imports.env = imports.env || {};
           var env = imports.env;
-          imports.env.memoryBase = imports.env.memoryBase || 0;
+          imports.env.memoryBase = imports.env.memoryBase || 1024;
           imports.env.tableBase = imports.env.tableBase || 0;
 
           /* rust/emscripten imports
@@ -44,11 +44,18 @@
             (import "env" "tableBase" (global (;4;) i32))
           */
 
-          env.DYNAMICTOP_PTR = env.DYNAMICTOP_PTR || 0;
+          var memory = new WebAssembly.Memory({ initial: 256, maximum: 256 });
+
           env.STACKTOP = env.STACKTOP || 0;
           env.STACK_MAX = env.STACK_MAX || 5*1024*1024;
-          env.enlargeMemory = env.enlargeMemory || function() { throw "error enlarging memory"; };
-          env.getTotalMemory = env.getTotalMemory || function() { return 65536 * 256; };
+          env.DYNAMICTOP_PTR = env.STACK_MAX;
+          env.enlargeMemory = env.enlargeMemory || function() { 
+            console.log("called enlargeMemory(" + JSON.stringify(arguments) + ");");
+            return 1;
+          };
+          env.getTotalMemory = env.getTotalMemory || function() {
+              return 16 * 1024 * 1024;
+          };
           env.abortOnCannotGrowMemory = env.abortOnCannotGrowMemory || function() { throw "abort growing memory"; };
           env._abort = env._abort || function() { throw "_abort"; };
           env.abort = env.abort || function() { throw "abort"; };
@@ -77,7 +84,7 @@
           }
 
           if (!imports.env.memory) {
-            imports.env.memory = new WebAssembly.Memory({ initial: 256, maximum: 256 });
+            imports.env.memory = memory;
           }
           if (!imports.env.table) {
             imports.env.table = new WebAssembly.Table({ initial: 0, maximum: 0, element: 'anyfunc' });
@@ -88,8 +95,14 @@
 
     loadWebAssembly('out/contract.wasm')
       .then(instance => {
+        debugger;
         var exports = instance.exports;
         var call = exports._call;
+        var malloc = exports._malloc;
+        var data_ptr = malloc(1024*8);
+
+        console.log("data_ptr: " + data_ptr);
+
         var button = document.getElementById('do-call');
         button.value = 'Execute call';
         button.addEventListener('click', function() {