Add support for switching ROMs in the web interface.

nelhage · Jun 2, 2011 · 643f62e · 643f62e
1 parent b59ba9a
commit 643f62e
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Showing 2 changed files with 39 additions and 3 deletions.
diff --git a/beta.html b/beta.html
@@ -11,6 +11,11 @@
     <script language="javascript" type="text/javascript" src="tests/litmus.js"></script>
     <link rel="stylesheet" type="text/css" href="termlib/term_styles.css" />
     <link rel="stylesheet" type="text/css" href="beta.css" />
+    <script language="javascript" type="text/javascript">
+      betaROMs.push(new BetaROM("Lab 8", lab8_rom));
+      betaROMs.push(new BetaROM("litmus", litmus_rom));
+      betaROMs.push(new BetaROM("hello", hello_rom));
+    </script>
   </head>
   <body onload="initBeta();">
     <div id='beta'>
@@ -19,6 +24,11 @@
       <div id='controls'>
         <input id='resetbutton' type="button" value="reset" onclick='resetBeta();'/>
         <input id='playplausebutton' type="button" value="run" onclick='playPauseBeta();'/>
+        Load ROM:
+        <select id='romselector'>
+          <option></option>
+        </select>
+        <input id='loadrombutton' type="button" value="Go!" onclick='loadROM();'/>
         <div id='betapc'>
         </div>
       </div>

diff --git a/betaweb.js b/betaweb.js
@@ -1,5 +1,11 @@
 var betaTerm;
 var betaDiv;
+var betaROMs = [];
+
+function BetaROM(name, rom) {
+    this.name = name;
+    this.rom  = rom;
+}
 
 function initBeta() {
     betaTerm = new Terminal( {handler: termHandler, initHandler: initTerm} );
@@ -8,13 +14,33 @@ function initBeta() {
 
     betaDiv = document.getElementById('termDiv');
     betaDiv.onmousedown = mouseHandler;
+
+    var select = document.getElementById('romselector');
+    var i, option;
+    while (select.firstChild)
+        select.removeChild(select.firstChild);
+    for (i = 0; i < betaROMs.length; i++) {
+        option = document.createElement('option');
+        option.value = i;
+        option.appendChild(document.createTextNode(betaROMs[i].name));
+        select.appendChild(option);
+    }
+
     resetBeta();
 }
 
-function resetBeta() {
+function loadROM() {
+    var select = document.getElementById('romselector');
+    var rom = betaROMs[select.children[select.selectedIndex].value];
+    resetBeta(rom)
+}
+
+function resetBeta(rom) {
+    if (rom === undefined)
+        rom = betaROMs[0];
     betaTerm.clear();
 
-    MMU.load(lab8_rom);
+    MMU.load(rom.rom);
     CPU.reset({timer: true,
                write: function(ch){
                    if (ch == 10)
@@ -23,7 +49,7 @@ function resetBeta() {
                        betaTerm.type(String.fromCharCode(ch));
                },
                halt: function() {
-                   term.type("--- Program terminated ----");
+                   betaTerm.type("--- Program terminated ----");
                }});
     playPauseBeta();
 }