Implement branches; debug CC test loader and character mode tests.

webUI/tools/B5500SyllableDebugger.html

@@ -280,6 +280,7 @@ function displayProcessorState() {
     displayStack();
     displayMemory();
     displayRegisters();
+    window.focus();
 }
 
 function stepIt(exec) {
@@ -387,7 +388,55 @@ function tos_onChange(ev, bicID, valueID, origID) {
     return value;
 }
 
-window.onload = function() {
+function fileLoader_onLoad(ev) {
+    /* Handle the onload event for an ArrayBuffer FileReader */
+    var addr = 0;                   // starting B5500 memory address
+    var buf = ev.target.result;
+    var words = 0;
+
+    try {
+        words = cc.loadTest(buf, addr);
+        alert("File loaded: " + buf.byteLength + " bytes, " +
+              words + " words, last addr = @" + (addr+words-1).toString(8));
+    } catch (e) {
+        words = 0;
+        alert("File load failed: " + e.toString());
+    }
+    if (words > 0) {
+        cc.P1.preset(0x10);             // execute from address @20
+        displayProcessorState();
+    }
+}
+
+function fileSelector_onChange(ev) {
+    /* Handle the <input type=file> onchange event when a file is selected */
+    var f = ev.target.files[0];
+    var reader = new FileReader();
+
+    reader.onload = fileLoader_onLoad;
+    reader.readAsArrayBuffer(f);
+}
+
+function checkBrowser() {
+    /* Checks whether this browser can support the necessary stuff */
+    var missing = "";
+
+    if (!window.File) {missing += ", File"}
+    if (!window.FileReader) {missing += ", FileReader"}
+    if (!window.FileList) {missing += ", FileList"}
+    if (!window.Blob) {missing += ", Blob"}
+    if (!window.ArrayBuffer) {missing += ", ArrayBuffer"}
+    if (!window.DataView) {missing += ", DataView"}
+
+    if (missing.length == 0) {
+        return true;
+    } else {
+        alert("No can do... your browser does not support the following features:\n" + missing.substring(2));
+        return false;
+    }
+}
+
+function initialize() {
 
     $$("LogoDiv").onclick = function(ev) {
         displayProcessorState();
@@ -523,6 +572,8 @@ window.onload = function() {
     $$("MWordP3").onchange = word_onChange;
     $$("MWordP4").onchange = word_onChange;
 
+    document.getElementById("FileSelector").addEventListener("change", fileSelector_onChange, false);
+
     cc = new B5500CentralControl();
     cc.powerOn();
     cc.clear();
@@ -540,6 +591,12 @@ window.onload = function() {
 
     displayProcessorState();
 }
+
+window.onload = function() {
+    if (checkBrowser()) {
+        initialize();
+    }
+}
 </script>
 </head>
 
@@ -554,6 +611,9 @@ window.onload = function() {
 </div>
 
 <h3>B5500 Syllable Debugger</h3>
+<p>
+    <input id=FileSelector type=file size=60>
+</p>
 
 <table id=RegisterBank1 class="normal border">
 <thead>