diff --git a/devices/pc8080/machine/vt100/README.md b/devices/pc8080/machine/vt100/README.md
index d0fd8bb8e..8c6e3c546 100644
--- a/devices/pc8080/machine/vt100/README.md
+++ b/devices/pc8080/machine/vt100/README.md
@@ -14,10 +14,15 @@ VT100 Terminal
 This is where we'll be testing another 8080-based machine: the VT100 Terminal. Unlike other VT100 emulations,
 this will simulate a VT100 by running the terminal's original firmware inside the [PC8080](/modules/pc8080/) CPU emulator.
 
+{% include machine.html id="vt100" %}
+
+VT100 Memory Usage
+------------------
+
 As described in the [Technical Manual (July 1982)](http://bitsavers.informatik.uni-stuttgart.de/pdf/dec/terminal/vt100/EK-VT100-TM-003_VT100_Technical_Manual_Jul82.pdf),
 p. 4-15, 8Kb (0x2000) of ROM is located at 0x0000, and 3Kb (0x0C00) of RAM immediately follows it at 0x2000.  The ROM at
-0x0000 contains all the VT100's 8080 code.  The VT100 also contains a 2Kb character generator ROM, but it is not
-mapped into the 8080's address space.
+0x0000 contains all the VT100's 8080 code.  The VT100 also contains a 2Kb character generator ROM, but that ROM is not
+addressable by the CPU; it is used directly by the Video Processor.
 
 [vt100romhax](http://vt100romhax.tumblr.com/post/90697428973/the-vt100-memory-map-and-8080-disassembly)
 (aka [phooky](https://github.com/phooky)) further explains VT100 memory usage:
@@ -29,18 +34,47 @@ mapped into the 8080's address space.
 	0x204f  0x22d0  641B    Scratch Pad/Setup Area(?)
 	0x22d0  0x2c00  2352B   Screen RAM
 
+VT100 I/O Ports
+---------------
+
+From p. 4-17 of the Technical Manual:
+
+	READ OR WRITE
+	00H     PUSART data bus
+	01H     PUSART command port
+	
+	WRITE ONLY (Decoded with I/O WR L)
+	02H     Baud rate generator
+	42H     Brightness D/A latch
+	62H     NVR latch
+	82H     Keyboard UART data input
+	A2H     Video processor DC012
+	C2H     Video processor DC011
+	E2H     Graphics port
+	
+	READ ONLY (Decoded with I/O RD L)
+	22H     Modem buffer
+	42H     Flags buffer
+	82H     Keyboard UART data output
+
+The PC8080 ChipSet component deals with the ER1400's Non-volatile RAM (NVR) ports, while the Keyboard component
+deals with the Keyboard UART ports.
+
+VT100 Video Processor
+---------------------
+
 Normally, the PC8080 Video component allocates its own video buffer, based on the specified buffer address
 (*bufferAddr*) and other dimensions (eg, *bufferCols* and *bufferRows*), but the VT100 is a little unusual:
 it has a custom Video Processor that uses DMA to request character data from any region of RAM, one line at a time.
 It always defaults to address 0x2000 for the first line of character data, but each line terminates with 3 bytes
-containing line attributes and the address of the next line, so the location of subsequent lines will vary,
-depending on the following line attributes:
+containing the attributes and address of the next line, so the location of subsequent lines will vary, depending
+on the type of line:
 
-- Single-width characters (80 or 132 columns)
-- Double-width characters (40 or 66 columns)
+- Single-wide characters (80 or 132 columns)
+- Double-wide characters (40 or 66 columns)
 
-In addition to single-width vs. double-width, line attributes can also specify double-height, along with whether the
-top or bottom halves of the double-high characters should be displayed.  Also, double-high always implies double-wide
+In addition to single-wide vs. double-wide, line attributes can also specify double-high, along with whether the
+top or bottom halves of the double-high characters should be displayed, because double-high always implies double-wide
 (ie, there is no support for double-high, single-wide characters).
 
 Conssequently, a VT100 [machine XML file](machine.xml) must set the Video component's *bufferRAM* property
@@ -50,6 +84,9 @@ enabling support for the VT100's line data format; eg:
 	<ram id="ram" addr="0x2000" size="0x0C00"/>
 	<video id="video" screenWidth="1600" screenHeight="960" bufferAddr="0x2000" bufferRAM="true" bufferFormat="vt100" bufferCols="80" bufferRows="24" ...>
 
+VT100 Screen and Character Dimensions
+-------------------------------------
+
 Ordinarily, the VT100 screen displays 800 dots per horizontal scan, and a total of 240 horizontal scans, and by default,
 it uses a 10x10 character cell, for a total of 80 columns and 24 rows of characters.  However, in 132-column mode, it
 uses a 9x10 character cell instead, implying a total of 1188 dots displayed per horizontal scan.  This means we will have
@@ -64,9 +101,7 @@ measure 2.0mm x 3.35mm (in 132-column mode, they measure 1.3mm x 3.35mm), which
 roughly 160mm x 80mm, implying a screen aspect ratio of 2.0.  However, after visually comparing the Technical Manual's SET-UP
 screenshots to our test screens, 1.67 appears to be closer to reality than 2.0.  I'll revisit this issue at a later date.  
 
-{% include machine.html id="vt100" %}
-
-VT100 Resources
----------------
+Additional VT100 Resources
+--------------------------
 
 [VT100 Publications](/pubs/dec/vt100/)
diff --git a/modules/pc8080/lib/keyboard.js b/modules/pc8080/lib/keyboard.js
index ff6a01818..f21fffb0a 100644
--- a/modules/pc8080/lib/keyboard.js
+++ b/modules/pc8080/lib/keyboard.js
@@ -57,6 +57,20 @@ function Keyboard(parmsKbd)
 
 Component.subclass(Keyboard);
 
+Keyboard.VT100 = {
+    STATUS: {
+        PORT:       0x82,               // write-only
+        LED4:       0x01,
+        LED3:       0x02,
+        LED2:       0x04,
+        LED1:       0x08,
+        LOCKED:     0x10,
+        ONLINE:     0x20,
+        START:      0x40,
+        CLICK:      0x80
+    }
+};
+
 /**
  * Alphanumeric and other common (printable) ASCII codes.
  *
@@ -234,6 +248,8 @@ Keyboard.SOFTCODES = {
     'fire':     Keyboard.KEYCODE.SPACE
 };
 
+Keyboard.MINPRESSTIME = 100;            // 100ms
+
 /**
  * Alternate keyCode mappings (to support the popular WASD directional mappings)
  *
@@ -246,44 +262,13 @@ Keyboard.ALTCODES[Keyboard.ASCII.D] = Keyboard.KEYCODE.RIGHT;
 Keyboard.ALTCODES[Keyboard.ASCII.L] = Keyboard.KEYCODE.SPACE;
 
 Keyboard.LEDSTATES = {
-    'l1':       0x01,
-    'l2':       0x02,
-    'l3':       0x04,
-    'l4':       0x08,
-    'locked':   0x10,
-    'local':    0x20,
-    'online':   0x40
-};
-
-/**
- * getSoftCode(keyCode)
- *
- * @this {Keyboard}
- * @return {string|null}
- */
-Keyboard.prototype.getSoftCode = function(keyCode)
-{
-    keyCode = Keyboard.ALTCODES[keyCode] || keyCode;
-    for (var sSoftCode in Keyboard.SOFTCODES) {
-        if (Keyboard.SOFTCODES[sSoftCode] === keyCode) {
-            return sSoftCode;
-        }
-    }
-    return null;
-};
-
-/**
- * reset()
- *
- * @this {Keyboard}
- */
-Keyboard.prototype.reset = function()
-{
-    /*
-     * As SOFTCODE keyDown events are encountered, a corresponding property is set to true in
-     * keysPressed, and as SOFTCODE keyUp events are encountered, the property is set to false.
-     */
-    this.keysPressed = {};
+    'l4':       Keyboard.VT100.STATUS.LED4,
+    'l3':       Keyboard.VT100.STATUS.LED3,
+    'l2':       Keyboard.VT100.STATUS.LED2,
+    'l1':       Keyboard.VT100.STATUS.LED1,
+    'locked':   Keyboard.VT100.STATUS.LOCKED,
+    'online':   Keyboard.VT100.STATUS.ONLINE,
+    'local':   ~Keyboard.VT100.STATUS.ONLINE
 };
 
 /**
@@ -372,6 +357,138 @@ Keyboard.prototype.setBinding = function(sHTMLType, sBinding, control, sValue)
     return false;
 };
 
+/**
+ * initBus(cmp, bus, cpu, dbg)
+ *
+ * @this {Keyboard}
+ * @param {Computer} cmp
+ * @param {Bus} bus
+ * @param {CPUState} cpu
+ * @param {Debugger} dbg
+ */
+Keyboard.prototype.initBus = function(cmp, bus, cpu, dbg)
+{
+    this.dbg = dbg;     // NOTE: The "dbg" property must be set for the message functions to work
+    this.chipset = cmp.getMachineComponent("ChipSet");
+    this.model = this.chipset.model;
+    switch(this.model) {
+    case ChipSet.VT100.MODEL:
+        this.config = Keyboard.VT100;
+        break;
+    }
+    if (this.config) {
+        bus.addPortInputTable(this, this.config.portsInput);
+        bus.addPortOutputTable(this, this.config.portsOutput);
+    }
+};
+
+/**
+ * powerUp(data, fRepower)
+ *
+ * @this {Keyboard}
+ * @param {Object|null} data
+ * @param {boolean} [fRepower]
+ * @return {boolean} true if successful, false if failure
+ */
+Keyboard.prototype.powerUp = function(data, fRepower)
+{
+    if (!fRepower) {
+        if (!data) {
+            this.reset();
+        } else {
+            if (!this.restore(data)) return false;
+        }
+    }
+    return true;
+};
+
+/**
+ * powerDown(fSave, fShutdown)
+ *
+ * @this {Keyboard}
+ * @param {boolean} [fSave]
+ * @param {boolean} [fShutdown]
+ * @return {Object|boolean} component state if fSave; otherwise, true if successful, false if failure
+ */
+Keyboard.prototype.powerDown = function(fSave, fShutdown)
+{
+    return fSave? this.save() : true;
+};
+
+Keyboard.VT100.init = [
+    [
+        0
+    ]
+];
+
+/**
+ * reset()
+ *
+ * @this {Keyboard}
+ */
+Keyboard.prototype.reset = function()
+{
+    /*
+     * As keyDown events are encountered, a corresponding "softcode" property in keysPressed
+     * is set to the timestamp of the keyDown event.  When the corresponding keyUp event occurs,
+     * we look at the elapsed time: if it is less than MINPRESSTIME, then we move the key
+     * to keysToRelease and set a timeout handler to release the key later; otherwise, we process
+     * the keyUp event immediately.
+     */
+    this.keysPressed = {};
+    this.keysToRelease = {};
+
+    if (this.config && !this.restore(this.config.init)) {
+        this.notice("reset error");
+    }
+};
+
+/**
+ * save()
+ *
+ * This implements save support for the Keyboard component.
+ *
+ * @this {Keyboard}
+ * @return {Object}
+ */
+Keyboard.prototype.save = function()
+{
+    var state = new State(this);
+    switch(this.model) {
+    case ChipSet.SI1978.MODEL:
+        break;
+    case ChipSet.VT100.MODEL:
+        state.set(0, [this.bLEDs]);
+        break;
+    }
+    return state.data();
+};
+
+/**
+ * restore(data)
+ *
+ * This implements restore support for the Keyboard component.
+ *
+ * @this {Keyboard}
+ * @param {Object} data
+ * @return {boolean} true if successful, false if failure
+ */
+Keyboard.prototype.restore = function(data)
+{
+    var a;
+    if (data && (a = data[0]) && a.length) {
+        switch(this.model) {
+        case ChipSet.SI1978.MODEL:
+            return true;
+        case ChipSet.VT100.MODEL:
+            this.bLEDs = a[0];
+            this.updateLEDs();
+            return true;
+        }
+    }
+    return false;
+};
+
 /**
  * setLED(control, f)
  *
@@ -388,36 +505,41 @@ Keyboard.prototype.setLED = function(control, f)
 };
 
 /**
- * updateLEDs(bitState)
+ * updateLEDs()
  *
  * @this {Keyboard}
- * @param {number} [bitState] is the bit in bitsStateSim that may have changed, if known; undefined if not
  */
-Keyboard.prototype.updateLEDs = function(bitState)
+Keyboard.prototype.updateLEDs = function()
 {
-    var control;
     for (var sBinding in Keyboard.LEDSTATES) {
         var id = "led-" + sBinding;
-        var bitLED = Keyboard.LEDSTATES[sBinding];
-        if ((!bitState || bitState == bitLED) && (control = this.bindings[id])) {
-            this.setLED(control, !!bitLED);     // !!(this.bKeyboardState & bitLED)
+        var control = this.bindings[id];
+        if (control) {
+            var bitLED = Keyboard.LEDSTATES[sBinding];
+            var fOn = !!(this.bLEDs & bitLED);
+            if (bitLED & (bitLED-1)) {
+                fOn = !(this.bLEDs & ~bitLED);
+            }
+            this.setLED(control, fOn);
         }
     }
 };
 
 /**
- * initBus(cmp, bus, cpu, dbg)
+ * getSoftCode(keyCode)
  *
  * @this {Keyboard}
- * @param {Computer} cmp
- * @param {Bus} bus
- * @param {CPUState} cpu
- * @param {Debugger} dbg
+ * @return {string|null}
  */
-Keyboard.prototype.initBus = function(cmp, bus, cpu, dbg)
+Keyboard.prototype.getSoftCode = function(keyCode)
 {
-    this.dbg = dbg;     // NOTE: The "dbg" property must be set for the message functions to work
-    this.chipset = cmp.getMachineComponent("ChipSet");
+    keyCode = Keyboard.ALTCODES[keyCode] || keyCode;
+    for (var sSoftCode in Keyboard.SOFTCODES) {
+        if (Keyboard.SOFTCODES[sSoftCode] === keyCode) {
+            return sSoftCode;
+        }
+    }
+    return null;
 };
 
 /**
@@ -425,7 +547,7 @@ Keyboard.prototype.initBus = function(cmp, bus, cpu, dbg)
  *
  * @this {Keyboard}
  * @param {Object} event
- * @param {boolean} fDown is true for a keyDown event, false for a keyUp event
+ * @param {boolean} fDown is true for a keyDown event, false for up
  * @return {boolean} true to pass the event along, false to consume it
  */
 Keyboard.prototype.onKeyDown = function(event, fDown)
@@ -454,12 +576,27 @@ Keyboard.prototype.onKeyDown = function(event, fDown)
  *
  * @this {Keyboard}
  * @param {string} sSoftCode
- * @param {boolean} fDown is true for a down event, false for an up event
+ * @param {boolean} fDown is true for a down event, false for up
  * @return {boolean} true to pass the event along, false to consume it
  */
 Keyboard.prototype.onSoftKeyDown = function(sSoftCode, fDown)
 {
-    this.keysPressed[sSoftCode] = fDown;
+    if (fDown) {
+        this.keysPressed[sSoftCode] = Date.now();
+        delete this.keysToRelease[sSoftCode];
+    } else {
+        var msDown = this.keysPressed[sSoftCode];
+        this.assert(msDown);
+        if (msDown) {
+            var msElapsed = Date.now() - msDown;
+            if (msElapsed < Keyboard.MINPRESSTIME) {
+                this.keysToRelease[sSoftCode] = msDown;
+                this.checkSoftKeysToRelease();
+                return true;
+            }
+        }
+        delete this.keysPressed[sSoftCode];
+    }
 
     if (this.chipset) {
         switch(sSoftCode) {
@@ -488,7 +625,60 @@ Keyboard.prototype.onSoftKeyDown = function(sSoftCode, fDown)
             break;
         }
     }
-    return false;
+    return true;
+};
+
+/**
+ * checkSoftKeysToRelease()
+ *
+ * @this {Keyboard}
+ */
+Keyboard.prototype.checkSoftKeysToRelease = function()
+{
+    var msDelayMin = -1;
+    var asSoftCodes = Object.keys(this.keysToRelease);
+    for (var sSoftCode in asSoftCodes) {
+        var msDown = this.keysToRelease[sSoftCode];
+        var msElapsed = Date.now() - msDown;
+        var msDelay = Keyboard.MINPRESSTIME - msElapsed;
+        if (msDelay > 0) {
+            if (msDelayMin < 0 || msDelayMin > msDelay) {
+                msDelayMin = msDelay;
+            }
+        } else {
+            delete this.keysToRelease[sSoftCode];
+            this.onSoftKeyDown(sSoftCode, false);
+        }
+    }
+    if (msDelayMin >= 0) {
+        var kbd = this;
+        setTimeout(function() { kbd.checkSoftKeysToRelease(); }, msDelayMin);
+    }
+};
+
+/**
+ * outVT100UARTStatus(port, b, addrFrom)
+ *
+ * @this {Keyboard}
+ * @param {number} port (0x82)
+ * @param {number} b
+ * @param {number} [addrFrom] (not defined if the Debugger is trying to write the specified port)
+ */
+Keyboard.prototype.outVT100UARTStatus = function(port, b, addrFrom)
+{
+    this.printMessageIO(port, b, addrFrom, "KBDUART.STATUS", null, true);
+    this.bLEDs = b;
+    this.updateLEDs();
+};
+
+/*
+ * Port notification tables
+ */
+Keyboard.VT100.portsInput = {
+};
+
+Keyboard.VT100.portsOutput = {
+    0x82: Keyboard.prototype.outVT100UARTStatus
 };
 
 /**
diff --git a/versions/pc8080/1.23.3/pc8080-dbg.js b/versions/pc8080/1.23.3/pc8080-dbg.js
index b91d1fddd..fff9ab66d 100644
--- a/versions/pc8080/1.23.3/pc8080-dbg.js
+++ b/versions/pc8080/1.23.3/pc8080-dbg.js
@@ -1,224 +1,227 @@
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+function q(a,b){var c="";void 0===b?b=8:8<b&&(b=8);if(null==a||isNaN(a))for(;0<b--;)c="?"+c;else for(;0<b--;){var d=a&15,d=d+(0<=d&&9>=d?48:55),c=String.fromCharCode(d)+c;a>>=4}return c}function t(a){return"0x"+q(a,4)}function ba(a,b){var c=a,d=a.lastIndexOf("/");0<=d&&(c=a.substr(d+1));d=c.indexOf("&");0<d&&(c=c.substr(0,d));b&&(d=c.lastIndexOf("."),0<d&&(c=c.substring(0,d)));return c}function ca(a){var b="",c=a.lastIndexOf(".");0<=c&&(b=a.substr(c+1).toLowerCase());return b}
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