diff --git a/emulator/B220Processor.js b/emulator/B220Processor.js
index 88c65de..174c2db 100644
--- a/emulator/B220Processor.js
+++ b/emulator/B220Processor.js
@@ -260,22 +260,20 @@ function B220Processor(config, devices) {
 *   Global Constants                                                   *
 ***********************************************************************/
 
-B220Processor.version = "1.00a";
+B220Processor.version = "1.01";
 
 B220Processor.tick = 1000/200000;       // milliseconds per clock cycle (200KHz)
 B220Processor.cyclesPerMilli = 1/B220Processor.tick;
                                         // clock cycles per millisecond (200 => 200KHz)
-B220Processor.timeSlice = 10;           // maximum processor time slice, ms
-B220Processor.delayAlpha = 0.0001;      // decay factor for exponential weighted average delay
+B220Processor.timeSlice = 13;           // maximum processor time slice, ms
+B220Processor.delayAlpha = 0.000001;    // decay factor for exponential weighted average delay
 B220Processor.delayAlpha1 = 1-B220Processor.delayAlpha;
-B220Processor.slackAlpha = 0.0001;      // decay factor for exponential weighted average slack
+B220Processor.slackAlpha = 0.000001;    // decay factor for exponential weighted average slack
 B220Processor.slackAlpha1 = 1-B220Processor.slackAlpha;
 
-B220Processor.neonPersistence = 1000/60;
-                                        // persistence of neon bulb glow [ms]
+B220Processor.neonPersistence = 7;      // persistence of neon bulb glow [ms]
 B220Processor.maxGlowTime = B220Processor.neonPersistence;
                                         // panel bulb glow persistence [ms]
-B220Processor.lampGlowInterval = 50;    // background lamp sampling interval (ms)
 B220Processor.adderGlowAlpha = B220Processor.neonPersistence/12;
                                         // adder and carry toggle glow decay factor,
                                         // based on one digit (1/12 word) time [ms]
@@ -1833,7 +1831,7 @@ B220Processor.prototype.floatingAdd__WITH_ROUND = function floatingAdd(absolute)
             this.OFT.set(1);
             sign = ax = dx = limiter = 0;
         }
-    } else if (am < 0x50) {             // mantissa is zero
+    } else if (am == 0) {               // mantissa is zero
         ax = sign = limiter = 0;
         timing += 0.065;
     } else {                            // normalize the result as necessary
@@ -1870,12 +1868,16 @@ B220Processor.prototype.floatingAdd__WITH_ROUND = function floatingAdd(absolute)
 
     // Set toggles for display purposes and set the result.
     d = am%0x100;                       // get the rounding digits
-    am = (am - am%0x100)/0x100;         // scale back to 8 digits
-    if (d > 0x50) {                     // round required
+    am = (am - d)/0x100;                // scale back to 8 digits
+    if (d >= 0x50) {                    // round required
         am = this.bcdAdd(1, am, 11, 0, 0);
         if (am >= 0x100000000) {
-            am = (am - am%0x10)/0x10;
             ax = this.bcdAdd(1, ax, 3, 0, 0); // ignore exponent overflow, for now
+            d = am%0x10;
+            am = (am - d)/0x10;
+            if (d >= 5) {               // round again after scale right
+                am = this.bcdAdd(1, am, 11, 0, 0);
+            }
         }
     }
 
@@ -4294,7 +4296,6 @@ B220Processor.prototype.ioInitiate = function ioInitiate() {
 
     this.AST.set(1);
     this.asyncOn();
-    this.updateLampGlow(0);             // update the console lamps
     this.execLimit = 0;                 // kill the run() loop
 };
 
diff --git a/webUI/B220ConsolePrinter.js b/webUI/B220ConsolePrinter.js
index db773da..314e4e5 100644
--- a/webUI/B220ConsolePrinter.js
+++ b/webUI/B220ConsolePrinter.js
@@ -64,7 +64,7 @@ B220ConsolePrinter.ttySpeed = 10;       // TTY printer speed, char/sec
 B220ConsolePrinter.ttyNewLine = 200;    // TTY carriage-return delay, ms
 B220ConsolePrinter.whippetSpeed = 1000; // Whippet printer speed, char/sec
 B220ConsolePrinter.whippetNewLine = 75; // Whippet carriage-return delay, ms
-B220ConsolePrinter.formFeedPeriod = 500;// form-feed average delay, ms
+B220ConsolePrinter.formFeedPeriod = 500;// full-page form-feed delay, ms
 
 B220ConsolePrinter.pageSize = 66;       // lines/page for form-feed
 B220ConsolePrinter.maxScrollLines = 15000;
@@ -122,19 +122,25 @@ B220ConsolePrinter.prototype.emptyPaper = function emptyPaper() {
     while (this.paper.firstChild) {
         this.paper.removeChild(this.paper.firstChild);
     }
+
     this.paper.appendChild(this.doc.createTextNode(""));
+    this.printerLine = 0;
+    this.printerCol = 0;
+    this.printerEOP.scrollIntoView();
 };
 
 /**************************************/
-B220ConsolePrinter.prototype.emptyLine = function emptyLine(text) {
-    /* Removes excess lines already output, then appends a new text node to the
-   <pre> element within the paper element. Note that "text" is an ANSI string */
+B220ConsolePrinter.prototype.printNewLine = function printNewLine(text) {
+    /* Removes excess lines already output, then appends a newline to the
+    current text node, and then a new text node to the end of the <pre> element
+    within the paper element. Note that "text" is an ANSI string */
     var paper = this.paper;
     var line = text || "";
 
     while (paper.childNodes.length > B220ConsolePrinter.maxScrollLines) {
         paper.removeChild(paper.firstChild);
     }
+
     paper.lastChild.nodeValue += "\n";     // newline
     paper.appendChild(this.doc.createTextNode(line));
     ++this.printerLine;
@@ -152,14 +158,14 @@ B220ConsolePrinter.prototype.printChar = function printChar(code) {
     if (c != "?") {                     // some 220 codes just don't print
         line = this.paper.lastChild.nodeValue;
         len = line.length;
-        if (len < 1) {
+        if (len < 1) {                  // first char on line
             this.paper.lastChild.nodeValue = c;
             this.printerCol = 1;
-        } else if (len < this.columns) {
+        } else if (len < this.columns) {// normal char
             this.paper.lastChild.nodeValue = line + c;
             ++this.printerCol;
-        } else {
-             this.emptyLine(c);
+        } else {                        // right margin overflow
+             this.printNewLine(c);
         }
     }
 };
@@ -178,22 +184,35 @@ B220ConsolePrinter.prototype.printTab = function printTab() {
     } // for x
 
     if (this.columns < tabCol) {
-        this.emptyLine();                   // tab would overflow right margin
+        this.printNewLine();            // tab would overflow right margin
     } else {
         while (this.printerCol < tabCol) {
-            this.printChar(0x00);           // output a space
+            this.printChar(0x00);       // output a space
         }
     }
 };
 
 /**************************************/
 B220ConsolePrinter.prototype.printFormFeed = function printFormFeed() {
-    /* Simulates a form feed by outputting an appropriate number of blank lines */
+    /* Simulates a form feed by appending a newline and form feed to the
+    current text node, and then a new text node to the end of the <pre> element
+    within the paper element, with sufficient spaces to position the print head
+    to the same position on the line */
+    var paper = this.paper;
+    var line = "";
 
-    this.printerLine %= B220ConsolePrinter.pageSize;
-    while (this.printerLine < B220ConsolePrinter.pageSize) {
-        this.emptyLine();
+    while (line.length < this.printerCol-8) {
+        line += "        ";
     }
+
+    while (line.length < this.printerCol) {
+        line += " ";
+    }
+
+    paper.lastChild.nodeValue += "\n\f";        // newline + formfeed
+    paper.appendChild(this.doc.createTextNode(line));
+    this.printerLine = 0;
+    this.printerEOP.scrollIntoView();
 };
 
 /**************************************/
@@ -223,7 +242,6 @@ B220ConsolePrinter.prototype.copyPaper = function copyPaper(ev) {
     });
 
     this.emptyPaper();
-    this.emptyLine();
     ev.preventDefault();
     ev.stopPropagation();
 };
@@ -234,11 +252,11 @@ B220ConsolePrinter.prototype.button_Click = function button_Click(ev) {
 
     switch (ev.target.id) {
     case "LineFeedBtn":
-        this.emptyLine();
+        this.printNewLine();
         break;
     case "CarriageReturnBtn":
         if (this.printerCol > 0) {
-            this.emptyLine();
+            this.printNewLine();
         }
         break;
     case "OpenPanelBtn":
@@ -410,7 +428,6 @@ B220ConsolePrinter.prototype.printerOnLoad = function printerOnLoad(ev) {
     this.paper = this.$$("Paper");
     this.printerEOP = this.$$("EndOfPaper");
     this.emptyPaper();
-    this.emptyLine();
 
     body = this.$$("FormatControlsDiv");
     this.remoteKnob = new BlackControlKnob(body, null, null, "RemoteKnob",
@@ -536,7 +553,7 @@ B220ConsolePrinter.prototype.receiveSign = function receiveSign(char, successor)
         break;
     } // switch
 
-    if (this.nextCharTime <= stamp) {
+    if (this.nextCharTime < stamp) {
         this.nextCharTime = stamp;
     }
 
@@ -548,7 +565,7 @@ B220ConsolePrinter.prototype.receiveSign = function receiveSign(char, successor)
 B220ConsolePrinter.prototype.receiveChar = function receiveChar(char, successor) {
     /* Receives a non-sign character from the processor and outputs it. Special handling
     is provided for tabs, carriage returns, form feeds, and end-of-word characters */
-    var delay = this.charPeriod;                // default character delay
+    var delay = this.charPeriod;                // default character delay, ms
     var nextReceiver = this.boundReceiveChar;   // default routine to receive next char
     var stamp = performance.now();              // current time
 
@@ -558,10 +575,12 @@ B220ConsolePrinter.prototype.receiveChar = function receiveChar(char, successor)
         break;
 
     case 0x02:                          // blank (non-print)
+        delay = 10;                             // a guess...
         break;
 
     case 0x15:                          // form-feed
-        delay = B220ConsolePrinter.formFeedPeriod;
+        delay = this.newLinePeriod + B220ConsolePrinter.formFeedPeriod *
+                    (1 - (this.printerLine%B220ConsolePrinter.pageSize)/B220ConsolePrinter.pageSize);
         this.suppressLZ = 0;
         this.printFormFeed();
         break;
@@ -569,7 +588,7 @@ B220ConsolePrinter.prototype.receiveChar = function receiveChar(char, successor)
     case 0x16:                          // carriage-return
         delay = this.newLinePeriod;
         this.suppressLZ = 0;
-        this.emptyLine();
+        this.printNewLine();
         break;
 
     case 0x26:                          // tab
@@ -589,7 +608,7 @@ B220ConsolePrinter.prototype.receiveChar = function receiveChar(char, successor)
                 break;
             case 2:                             // EOW = carriage-return
                 delay = this.newLinePeriod;
-                this.emptyLine();
+                this.printNewLine();
                 break;
             }
         }
diff --git a/webUI/B220ControlConsole.js b/webUI/B220ControlConsole.js
index f8a158f..344e18d 100644
--- a/webUI/B220ControlConsole.js
+++ b/webUI/B220ControlConsole.js
@@ -103,7 +103,7 @@ function B220ControlConsole(p, systemShutdown) {
 }
 
 /**************************************/
-B220ControlConsole.displayRefreshPeriod = 100;  // milliseconds
+B220ControlConsole.displayRefreshPeriod = 50;   // milliseconds
 B220ControlConsole.offSwitchImage = "./resources/ToggleDown.png";
 B220ControlConsole.onSwitchImage = "./resources/ToggleUp.png";
 B220ControlConsole.offOrganSwitchImage = "./resources/Organ-Switch-Up.png"
@@ -470,7 +470,7 @@ B220ControlConsole.prototype.updatePanel = function updatePanel() {
     text = (timer/1000 + 10000).toFixed(1);
     this.intervalTimer.textContent = text.substring(text.length-6);
 
-    p.updateLampGlow(p.AST.value ? 0.75 : 0);
+    p.updateLampGlow(p.AST.value ? 1 : 0);
     eLevel = (p.RUT.value ? p.EXT.glow : p.EXT.value);
 
     // Primary Registers