diff --git a/apps/pdp11/tapes/diags/README.md b/apps/pdp11/tapes/diags/README.md
index 6866f20dd..2bae0b8e5 100644
--- a/apps/pdp11/tapes/diags/README.md
+++ b/apps/pdp11/tapes/diags/README.md
@@ -43,8 +43,8 @@ p. 19:
 	
 	ABSTRACT
 	
-	This is a group of 12 tests that incrementally test and isolate simple malfunctions of the PDP-11. The tests
-	should be run in the indicated numerical sequence. The sequence is:
+	This is a group of 12 tests that incrementally test and isolate simple malfunctions of
+	the PDP-11. The tests should be run in the indicated numerical sequence. The sequence is:
 	
 	1. Branch
 	2. Conditional Branch
@@ -75,8 +75,8 @@ p. 19:
 	 
 	SWITCH REGISTER OPTIONS = No
 
-The code for "TEST 1 - BRANCH" is not terribly exciting.  Most of its 8Kb length is filled repeatedly with these
-three instructions:
+The code for "TEST 1 - BRANCH" is not terribly exciting.  Most of its 8Kb length is filled with these
+three repeated instructions:
 
 	000210: 060100                 ADD   R1,R0
 	000212: 000401                 BR    000216
diff --git a/modules/pdp11/lib/cpu.js b/modules/pdp11/lib/cpu.js
index 0498a56b4..a1019234a 100644
--- a/modules/pdp11/lib/cpu.js
+++ b/modules/pdp11/lib/cpu.js
@@ -959,9 +959,12 @@ CPUPDP11.prototype.setTimer = function(iTimer, ms, fReset)
              * We must now confront the following problem: if the CPU is currently executing a burst of cycles,
              * the number of cycles it has executed in that burst so far must NOT be charged against the cycle
              * timeout we're about to set.  The simplest way to resolve that is to immediately call endBurst()
-             * and bias the above cycle timeout by the number of cycles that the burst executed.
+             * and bias the cycle timeout by the number of cycles that the burst executed.
              */
-            this.aTimers[iTimer][0] = nCycles + this.endBurst();
+            if (this.flags.running) {
+                nCycles += this.endBurst();
+            }
+            this.aTimers[iTimer][0] = nCycles;
         }
     }
     return nCycles;
@@ -992,6 +995,7 @@ CPUPDP11.prototype.getBurstCycles = function(nCycles)
 {
     for (var i = this.aTimers.length - 1; i >= 0; i--) {
         var timer = this.aTimers[i];
+        this.assert(!isNaN(timer[0]));
         if (timer[0] < 0) continue;
         if (nCycles > timer[0]) {
             nCycles = timer[0];
@@ -1014,6 +1018,7 @@ CPUPDP11.prototype.updateTimers = function(nCycles)
 {
     for (var i = this.aTimers.length - 1; i >= 0; i--) {
         var timer = this.aTimers[i];
+        this.assert(!isNaN(timer[0]));
         if (timer[0] < 0) continue;
         timer[0] -= nCycles;
         if (timer[0] <= 0) {
diff --git a/modules/pdp11/lib/cpuops.js b/modules/pdp11/lib/cpuops.js
index 94aac8e89..bffa7785b 100644
--- a/modules/pdp11/lib/cpuops.js
+++ b/modules/pdp11/lib/cpuops.js
@@ -140,7 +140,7 @@ PDP11.fnASR = function(src, dst)
  */
 PDP11.fnASRB = function(src, dst)
 {
-    var result = (dst & 0x800) | (dst >> 1) | (dst << 8);
+    var result = (dst & 0x80) | (dst >> 1) | (dst << 8);
     this.updateShiftFlags(result << 8);
     return result & 0xff;
 };
diff --git a/modules/pdp11/lib/cpustate.js b/modules/pdp11/lib/cpustate.js
index e5a431362..081c69096 100644
--- a/modules/pdp11/lib/cpustate.js
+++ b/modules/pdp11/lib/cpustate.js
@@ -2016,7 +2016,7 @@ CPUStatePDP11.prototype.updateDstByte = function(opCode, src, fnOp)
     var reg = this.dstReg = opCode & PDP11.OPREG.MASK;
     var mode = this.dstMode = (opCode & PDP11.OPMODE.MASK) >> PDP11.OPMODE.SHIFT;
     if (!mode) {
-        this.regsGen[reg] = (this.regsGen[reg] & 0xff00) | fnOp.call(this, src, this.regsGen[reg]);
+        this.regsGen[reg] = (this.regsGen[reg] & 0xff00) | fnOp.call(this, src, this.regsGen[reg] & 0xff);
     } else {
         var addr = this.dstAddr = this.getAddr(mode, reg, PDP11.ACCESS.UPDATE_BYTE);
         this.writeByteToPhysical(addr, fnOp.call(this, src, this.readByteFromPhysical(addr)));
diff --git a/modules/pdp11/lib/debugger.js b/modules/pdp11/lib/debugger.js
index f5be91339..977597e3d 100644
--- a/modules/pdp11/lib/debugger.js
+++ b/modules/pdp11/lib/debugger.js
@@ -2946,8 +2946,13 @@ if (DEBUGGER) {
         if (!dbgAddr) return;
 
         var len = 0;                            // 0 is not a default; it triggers the appropriate default below
+        var fRange = false;
+        var fJSON = (sCmd == "ds");
+
         if (sLen) {
+            fRange = true;
             if (sLen.charAt(0) == 'l') {
+                fRange = false;
                 sLen = sLen.substr(1) || sBytes;
             }
             len = this.parseValue(sLen) >>> 0;  // negative lengths not allowed
@@ -2959,8 +2964,9 @@ if (DEBUGGER) {
          * since this is primarily a word-oriented machine.
          */
         var size = (sCmd == "dd"? 4 : (sCmd == "db"? 1 : 2));
-        var nBytes = (size * len) || 128;
-        var nLines = ((nBytes + 15) >> 4) || 1;
+        var nBytes = (fRange? (len - dbgAddr.addr) : (size * len)) || 128;
+        var nBytesPerLine = fJSON? 16 : this.nBase;
+        var nLines = (((nBytes + nBytesPerLine - 1) / nBytesPerLine)|0) || 1;
 
         var sDump = "";
         while (nLines-- && nBytes > 0) {
@@ -2977,20 +2983,29 @@ if (DEBUGGER) {
              */
             var i, n;
             var data = 0, shift = 0;
-            for (i = this.nBase; i > 0 && nBytes > 0; i -= n, nBytes -= n) {
+            for (i = nBytesPerLine; i > 0 && nBytes > 0; i -= n, nBytes -= n) {
                 n = 1;
                 var v = size == 1? this.getByte(dbgAddr, n) : this.getWord(dbgAddr, (n = 2));
                 data |= (v << (shift << 3));
                 shift += n;
                 if (shift == size) {
-                    sData += this.toStrBase(data, size);
-                    sData += (size == 1? (i == 9? '-' : ' ') : "  ");
+                    if (fJSON) {
+                        if (sData) sData += ",";
+                        sData += "0x"+ str.toHex(data, size * 2);
+                    } else {
+                        sData += this.toStrBase(data, size);
+                        sData += (size == 1? (i == 9? '-' : ' ') : "  ");
+                    }
                     data = shift = 0;
                 }
                 sChars += (v >= 32 && v < 128? String.fromCharCode(v) : '.');
             }
-            if (sDump) sDump += '\n';
-            sDump += sAddr + "  " + sData + ((i == 0)? (' ' + sChars) : "");
+            if (sDump) sDump += "\n";
+            if (fJSON) {
+                sDump += sData + ",";
+            } else {
+                sDump += sAddr + "  " + sData + ((i == 0)? (' ' + sChars) : "");
+            }
         }
 
         if (sDump) this.println(sDump);
diff --git a/modules/pdp11/lib/messages.js b/modules/pdp11/lib/messages.js
index 3982a6985..ba510708f 100644
--- a/modules/pdp11/lib/messages.js
+++ b/modules/pdp11/lib/messages.js
@@ -42,7 +42,8 @@ var MessagesPDP11 = {
     DEVICE:     0x00000200,
     KEYBOARD:   0x00010000,
     KEYS:       0x00020000,
-    DISK:       0x00200000,
+    PAPER:      0x00100000,
+    DISK:       0x00400000,
     SERIAL:     0x00800000,
     SPEAKER:    0x02000000,
     COMPUTER:   0x04000000,
@@ -76,6 +77,7 @@ MessagesPDP11.CATEGORIES = {
     "device":   MessagesPDP11.DEVICE,
     "keyboard": MessagesPDP11.KEYBOARD, // "kbd" is also allowed as shorthand for "keyboard"; see doMessages()
     "key":      MessagesPDP11.KEYS,     // using "key" instead of "keys", since the latter is a method on JavasScript objects
+    "paper":    MessagesPDP11.PAPER,
     "disk":     MessagesPDP11.DISK,
     "serial":   MessagesPDP11.SERIAL,
     "speaker":  MessagesPDP11.SPEAKER,
diff --git a/modules/pdp11/lib/ram.js b/modules/pdp11/lib/ram.js
index efc8271b1..2c79b4ff9 100644
--- a/modules/pdp11/lib/ram.js
+++ b/modules/pdp11/lib/ram.js
@@ -33,13 +33,14 @@
 "use strict";
 
 if (NODE) {
-    var str          = require("../../shared/lib/strlib");
-    var web          = require("../../shared/lib/weblib");
-    var DumpAPI      = require("../../shared/lib/dumpapi");
-    var Component    = require("../../shared/lib/component");
-    var State        = require("../../shared/lib/state");
-    var PDP11        = require("./defines");
-    var MemoryPDP11  = require("./memory");
+    var str           = require("../../shared/lib/strlib");
+    var web           = require("../../shared/lib/weblib");
+    var DumpAPI       = require("../../shared/lib/dumpapi");
+    var Component     = require("../../shared/lib/component");
+    var State         = require("../../shared/lib/state");
+    var PDP11         = require("./defines");
+    var MemoryPDP11   = require("./memory");
+    var MessagesPDP11 = require("./messages");
 }
 
 /**
@@ -254,8 +255,8 @@ RAMPDP11.prototype.reset = function()
 /**
  * loadImage(aBytes, addrLoad, addrExec, addrInit, fReset)
  *
- * If the array contains an image in the "Absolute Format," load it as specified by
- * the format; otherwise, load it as-is using the address(es) supplied.
+ * If the array contains a PAPER tape image in the "Absolute Format," load it as specified
+ * by the format; otherwise, load it as-is using the address(es) supplied.
  *
  * @this {RAMPDP11}
  * @param {Array|Uint8Array} aBytes
@@ -339,7 +340,9 @@ RAMPDP11.prototype.loadImage = function(aBytes, addrLoad, addrExec, addrInit, fR
                 } else {
                     if (addrExec == null) addrExec = addr;
                 }
+                if (addrExec != null) this.printMessage("starting address: " + str.toHexWord(addrExec), MessagesPDP11.PAPER);
             } else {
+                this.printMessage("loading " + str.toHexWord(cbData) + " bytes at " + str.toHexWord(addr) + "-" + str.toHexWord(addr + cbData - 1), MessagesPDP11.PAPER);
                 while (cbData--) {
                     this.cpu.setByteDirect(addr++, aBytes[offData++] & 0xff);
                 }
@@ -361,9 +364,9 @@ RAMPDP11.prototype.loadImage = function(aBytes, addrLoad, addrExec, addrInit, fR
          * Set the start address to whatever the caller provided, or failing that, whatever start
          * address was specified inside the image.
          *
-         * For example, the diagnostic "MAINDEC-11-D0AA-PB" doesn't include a start address inside
-         * the image, but because we know that the directions for that diagnostic say to "Start and
-         * Restart at 200", we have manually inserted an "exec":128 in the JSON containing the image.
+         * For example, the diagnostic "MAINDEC-11-D0AA-PB" doesn't include a start address inside the
+         * image, but we know that the directions for that diagnostic say to "Start and Restart at 200",
+         * so we have manually inserted an "exec":128 in the JSON containing the image.
          */
         if (addrExec != null) this.cpu.setReset(addrExec, fReset);
     }
diff --git a/versions/pdpjs/1.30.3/pdp11-dbg.js b/versions/pdpjs/1.30.3/pdp11-dbg.js
index 1af4e9a33..2518ad5e5 100644
--- a/versions/pdpjs/1.30.3/pdp11-dbg.js
+++ b/versions/pdpjs/1.30.3/pdp11-dbg.js
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+function lh(a,b,c){t.call(this,"Disk",{id:a.Qa+".disk"+p(++mh,4)},lh,4194304);this.controller=a;this.C=a.C;this.i=a.i;this.B=b;this.Xa=b.name;this.fc=b.fc;nh(this,c,b.va,b.Aa,b.ra,b.La);H(this)}var mh=0;z(lh);k=lh.prototype;k.Fa=function(a,b,c,d){this.i=d};
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+function ph(a,b,c,d,e){var f=c;if(a.v)return!0;a.Xa=b;a.gb=c;a.Gc=ra(c);a.v=e;a.w=a.controller;if(d){var g=new FileReader;g.onload=function(){var b=g.result,c,d=b?b.byteLength:0,e=ka[d];if(e){a.va=e[0];a.Aa=e[1];a.ra=e[2];a.La=e[3]||512;c=a.La>>2;var f=e=0,b=new DataView(b,0,d);a.b=Array(a.va);for(d=0;d<a.b.length;d++)for(var r=a.b[d]=Array(a.Aa),w=0;w<r.length;w++)for(var y=r[w]=Array(a.ra),x=0;x<y.length;x++){for(var C=oh(null,d,w,x+1,a.La,0),ia=C.data,Ja=0;Ja<c;Ja++,f+=4)var P=ia[Ja]=b.getInt32(f,
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+null,!0,function(b,c,d){qh(a,b,c,d)})}
+function qh(a,b,c,d){var e=null;a.g=!1;var f=0>d&&a.C&&!a.C.A.ia;if(d)a.controller.P('Unable to load disk "'+a.Xa+'" (error '+d+": "+b+")",f);else{qb(a.controller.Qa,b,c);try{if(0<ra(a.Gc,!0).toLowerCase().indexOf("-readonly"))a.g=!0;else{var g=c.indexOf("\n");0<g&&1024>g&&0<c.substring(0,g).indexOf("write-protected")&&(a.g=!0)}var h;"<"==c.substr(0,1)?h=["Missing disk image: "+a.Xa]:h=0>c.indexOf("0x")&&'["'!=c.substr(0,2)?JSON.parse(c.replace(/([a-z]+):/gm,'"$1":').replace(/\/\/[^\n]*/gm,"")):eval("("+
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+k.seek=function(a,b,c,d,e){d=null;var f=this.B,g=this.b[a];if(g){var h=g[b];if(!h&&f.Mc&&b<f.Aa)for(h=g[b]=Array(f.Nc),g=0;g<h.length;g++)h[g]=oh(null,a,b,g+1,f.Ac,0);if(h){for(g=0;g<h.length;g++)if(h[g]&&h[g].sector==c){d=h[g];break}!d&&f.Mc&&9==f.pc&&(d=h[g]=oh(null,a,b,f.pc,f.Ac,0))}}e&&e(d,!1);return d};function rh(a,b){for(var c=0,d=a.length>>2,e=Array(d),f=0;f<d;f++)e[f]=b[c]|b[c+1]<<8|b[c+2]<<16|b[c+3]<<24,c+=4;a.data=e}
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-function qh(a,b){var c=a.Aa*a.ra,d=b/c|0;return d<a.va?(b%=c,a.seek(d,b/a.ra|0,b%a.ra+1)):null}function rh(a,b,c){for(var d=1,e=0,f=0;d--;){var g=a.read(b,c++);if(0>g)break;e|=g<<f;f+=8}return e}
+function sh(a,b){var c=a.Aa*a.ra,d=b/c|0;return d<a.va?(b%=c,a.seek(d,b/a.ra|0,b%a.ra+1)):null}function th(a,b,c){for(var d=1,e=0,f=0;d--;){var g=a.read(b,c++);if(0>g)break;e|=g<<f;f+=8}return e}
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-k.restore=function(a){var b=0,c="unsupported restore format";if(a&&0<a.length){var d=0,e=a[d++];e&&2<=e.length&&(!this.b.length&&6<=e.length?lh(this,"local",e[2],e[3],e[4],e[5]):null!=e[1]&&null!=this.f&&e[1]!=this.f&&(c="original checksum ("+e[1]+") differs from current checksum ("+this.f+")",b=-2));for(this.b.length||(b=-1);d<a.length&&0<=b;){var f=0,g=a[d++],h=g[f++],l=g[f++],m=g[f++];if(h>=this.b.length||l>=this.b[h].length||m>=this.b[h][l].length){c="sector (CHS="+h+":"+l+":"+m+") out of range ("+
+k.restore=function(a){var b=0,c="unsupported restore format";if(a&&0<a.length){var d=0,e=a[d++];e&&2<=e.length&&(!this.b.length&&6<=e.length?nh(this,"local",e[2],e[3],e[4],e[5]):null!=e[1]&&null!=this.f&&e[1]!=this.f&&(c="original checksum ("+e[1]+") differs from current checksum ("+this.f+")",b=-2));for(this.b.length||(b=-1);d<a.length&&0<=b;){var f=0,g=a[d++],h=g[f++],l=g[f++],m=g[f++];if(h>=this.b.length||l>=this.b[h].length||m>=this.b[h][l].length){c="sector (CHS="+h+":"+l+":"+m+") out of range ("+
 b+" changes applied)";b=-1;break}if(this.g){c="unable to modify write-protected disk";b=-1;break}e=g[f++];f=g[f++];g=e+f.length;if(h=this.b[h][l][m]){for(l=h.data.length;l<e;)h.data[l++]=h.pattern;l=0;h.Pa=e;for(h.Ca=f.length;e<g;)h.data[e++]=f[l++];b++}}}0>b&&-2!=b&&this.controller.P("Unable to restore disk '"+this.Xa+": "+c);return b};
-k.toJSON=function(){var a;a=0;for(var b;b=qh(this,a++);)sh(b);a=JSON.stringify(this.b,function(a,b){if("file"!=a)return b});a=a.replace(/,"length":512/gm,"").replace(/,"pattern":0/gm,"");a=a.replace(/"(sector|length|data|pattern)":/gm,"$1:");a=a.replace(/,"[^"]*":([0-9]+|true|false)/gm,"");a=a.replace(/(sector|length|data|pattern):/gm,'"$1":');return a=a.replace(/([\]}]),/gm,"$1,\n")};
-function sh(a){var b=a.data,c=b.length;if(c<<2==a.length){for(var d=c-1,e=b[d],f=0;d--&&b[d]===e;)f++;f++&&(b.length=c-f,a.pattern=e)}}function M(a){t.call(this,"RL11",a,M,2097152);this.B=a.autoMount||null;this.H=0;this.f=Array(4);this.L=!Oa("Mobi")&&window&&"FileReader"in window}z(M);k=M.prototype;
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-function ni(a,b,c,d){var e={},f=a.J[b].oc,g=0,h=null;0<=c&&c<f.length&&(g=f[c][0],h=f[c][1]);h&&(e=a.J[b].ha[h],h="."==h.charAt(0)?null:e.l||h);d.push(h);d.push(g);d.push(e.a);d.push(e.c)}function oi(a,b){var c=b.match(/^\s*([A-Z_]?[A-Z0-9_]*)\s*(=?)\s*(.*)$/i);if(c){if(!c[1])return Kh(a)||a.j("no variables"),!0;if(!c[2])return Kh(a,c[1]);if(!c[3])return delete a.W[c[1]],!0;b=Gh(a,c[3]);return void 0!==b?(a.W[c[1]]=b,!0):!1}a.j("invalid assignment:"+b);return!1}
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-function bi(a,b){var c;if(b&&"?"==b[1])a.j("register commands:"),a.j("\tr\tdump registers"),a.j("\trx [#]\tset flag or register x to [#]");else{var d=a.b;null==c&&(c=!0);if(b&&1<b.length){var e=b[1],f=e.indexOf("=");if(0<f)b=e.substr(f+1),e=e.substr(0,f);else if(2<b.length)b=b[2];else{a.j("missing value for "+b[1]);return}f=Gh(a,b);if(void 0===f)return;b=e.toUpperCase();switch(b){case "SP":case "R6":d.u[6]=f&65535;break;case "PC":case "R7":N(d,f);a.L=Y(d.u[7]);break;case "N":d.Y=f?32768:0;break;case "Z":d.aa=
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+a.j("\tbn [n]\tbreak after [n] instruction(s)");else{var ia=y.charAt(1);if("l"==ia){var Ja;Ja=0+ii(a,a.f);Ja+=ii(a,a.M);(Ja+=ii(a,a.D))||a.j("no breakpoints")}else if("n"==ia)a.ua=Kh(a,x),a.j("break after "+a.ua+" instruction(s)");else if(void 0===x)a.j("missing breakpoint address");else{var P=Y();if("*"!=x&&(P=Xh(a,x,!0),!P))break a;"c"==ia?null==P.F?(Oh(a),a.j("all breakpoints cleared")):gi(a,a.f,P)||gi(a,a.M,P)||gi(a,a.D,P)||a.j("breakpoint missing: "+J(a,P.F)):null!=P.F&&(ai(a,P,C),"p"==ia?a.nb(a.f,
+P):"r"==ia?a.nb(a.M,P):"w"==ia?a.nb(a.D,P):a.j("unknown breakpoint command: "+ia))}}}break;case "c":a.Ra&&(a.Ra.value="");break;case "d":a:{var hb,La=g[0],la=g[1],Ma=g[2],Mi=g[3];if("?"==la){var ib="";for(hb in Ab)a.Na[hb]&&(ib&&(ib+=","),ib+=hb);ib+=",state,symbols";a.j("dump memory commands:");a.j("\tdb [a] [#]    dump # bytes at address a");a.j("\tdw [a] [#]    dump # words at address a");a.j("\tdd [a] [#]    dump # dwords at address a");a.j("\tdh [#] [#]    dump # instructions from history");
+ib.length&&a.j("dump extension commands:\n\t"+ib)}else if("state"==la){var yg=ui(a.C,!0);"console"==Ma?console.log(yg):(a.Ra&&(a.Ra.value=""),a.j(yg))}else if("symbols"==la)for(var Id=0;Id<a.J.length;Id++){var Jd=a.J[Id],jb;for(jb in Jd.ha)if("."!=jb.charAt(0)){var zg=Jd.ha[jb].o;if(void 0!==zg){var Ag=Jd.ha[jb].l;Ag&&(jb=Ag);a.j(J(a,zg)+" "+jb)}}}else{if("d"==La){for(hb in Ab)if(g[1]==hb){var Bg=a.Na[hb];Bg?(g.shift(),g.shift(),Bg(g)):a.j("no dump registered for "+la);break a}la||(La=a.Vb||"dw")}else a.Vb=
+La;if("dh"==La){var Cg=la,Dg=Ma,Eg="",Fg=0,fa=a.$,ma=a.H;if(ma.length){var Z=+Cg||a.ub,Nb=+Dg||10;isNaN(Z)?Z=Nb:Eg="more ";Z>ma.length&&(a.j("note: only "+ma.length+" available"),Z=ma.length);fa-=Z;0>fa&&(null==ma[ma.length-1].F?(Z=fa+Z,fa=0):fa+=ma.length);var Kd=[];"call"==Dg&&(Nb=1E5,Kd=["CALL"]);for(void 0!==Cg&&a.j(Z+" instructions earlier:");0<Nb&&fa!=a.$;){var Gg=ma[fa++];if(null==Gg.F)break;var Ob=Y(Gg.F),Ni=Z--,Hg=ki(a,Ob,"history",Ni);(!Kd.length||0<=Hg.indexOf(Kd[0]))&&a.j(Hg);Ob.bc&&(fa+=
+Ob.bc,Nb-=Ob.bc,Z-=Ob.bc);fa>=ma.length&&(fa=0);a.ub=Z;Fg++;Nb--}}Fg||(a.j("no "+Eg+"history available"),a.ub=void 0)}else{var kb=Xh(a,la);if(kb){var Pb=0,Ld=!1,Md="ds"==La;Ma&&(Ld=!0,"l"==Ma.charAt(0)&&(Ld=!1,Ma=Ma.substr(1)||Mi),Pb=Kh(a,Ma)>>>0,65536<Pb&&(Pb=65536));for(var lb="dd"==La?4:"db"==La?1:2,Ec=(Ld?Pb-kb.F:lb*Pb)||128,Nd=Md?16:a.ca,Oi=(Ec+Nd-1)/Nd|0||1,Na="";Oi--&&0<Ec;){var Oa="",Ig="",la=J(a,kb.F),Qb,mb,Rb=0,Sb=0;for(Qb=Nd;0<Qb&&0<Ec;Qb-=mb,Ec-=mb){mb=1;var Fc=1==lb?a.Gb(kb,mb):a.pa(kb,
+mb=2),Rb=Rb|Fc<<(Sb<<3),Sb=Sb+mb;Sb==lb&&(Md?(Oa&&(Oa+=","),Oa+="0x"+p(Rb,2*lb)):(Oa+=J(a,Rb,lb),Oa+=1==lb?9==Qb?"-":" ":"  "),Rb=Sb=0);Ig+=32<=Fc&&128>Fc?String.fromCharCode(Fc):"."}Na&&(Na+="\n");Na=Md?Na+(Oa+","):Na+(la+"  "+Oa+(0==Qb?" "+Ig:""))}Na&&a.j(Na);a.lb=kb}}}}break;case "e":if("else"==g[0])break;var nb,Od,Pd,Qd,Rd=g[0],Sd=g[1];"eb"==Rd?(nb=1,Od=255,Pd=a.Gb,Qd=a.Xb):"e"==Rd||"ew"==Rd?(nb=2,Od=65535,Pd=a.pa,Qd=a.hb):Sd=null;if(null==Sd)a.j("edit memory commands:"),a.j("\teb [a] [...]  edit bytes at address a"),
+a.j("\tew [a] [...]  edit words at address a");else{var Gc=Xh(a,Sd);if(Gc)for(var Hc=2;Hc<g.length;Hc++){var Tb=Ih(a,g[Hc]);if(void 0===Tb){a.j("unrecognized value: "+g[Hc]);break}Tb&~Od&&a.j("warning: "+p(Tb)+" exceeds "+nb+"-byte value");a.j("changing "+J(a,Gc.F)+(F(a,64)?"":" from "+J(a,Pd.call(a,Gc),nb))+" to "+J(a,Tb,nb));Qd.call(a,Gc,Tb,nb)}}break;case "g":a:{var Jg=g[1],Pi=b;if(void 0!==Jg){var Td=Xh(a,Jg,!0);if(!Td)break a;ai(a,Td,Pi);a.nb(a.f,Td,!0)}a.ib(!0,c)}break;case "h":a.A.W?(c||a.j("halting"),
+a.ga()):vb(a,!0)||c||a.j("already halted");break;case "i":if("if"==g[0]){var Ud;var Ub=b.substr(2),Ub=xa(Ub);Ih(a,Ub)?(c||a.j("true: "+Ub),Ud=!0):(c||a.j("false: "+Ub),Ud=!1);Ud||(d=!1);break}f=!0;break;case "k":var Qi=g[0];if("?"==g[1])a.j("stack trace commands:"),a.j("\tk\tshow frame addresses"),a.j("\tks\tshow symbol information");else{var Vd=0,Wd=Y(),Vb=Y(a.b.u[6]);for(a.j("stack trace for "+J(a,Vb.F));10>Vd;){for(var Pa=null,Ri=256;65536>Vb.F>>>0;){Wd.F=a.pa(Vb,2);if(null==Vb.F||!Ri--)break;
+if(!(Wd.F&1)){for(var Si=a,Ic=Wd,Kg=null,Wb=Ic.F,Lg=Wb,Xd=1;6>=Xd&&Wb;Xd++){if(2<Xd){Ic.F=Wb;var Jc=ki(Si,Ic);if(0<=Jc.indexOf("JSR")){var Mg=Jc.indexOf(" ");if(Wb+(Jc.indexOf(" ",Mg+1)-Mg-1)/2==Lg){Kg=Jc;break}}}Wb-=2}Ic.F=Lg;if(Pa=Kg)break}}if(!Pa||null==Pa)break;var Ng=null;if("ks"==Qi){var Og=Pa.match(/[0-9A-F]+$/);Og&&(Ng=ri(a,Og[0]))}Pa=wa(Pa,50)+"  ;"+(Ng||"stack="+J(a,Vb.F));a.j(Pa);Vd++}Vd||a.j("no return addresses found")}break;case "l":if("ln"==g[0]){ri(a,g[1],!0);break}f=!0;break;case "m":a:{var na,
+oa=null,G=g[1];"?"==G&&(G=void 0);if(void 0!==G){var Ca=0;if("all"==G)Ca=1878917119,G=null;else if("on"==G)oa=!0,G=null;else if("off"==G)oa=!1,G=null;else{"keys"==G&&(G="key");"kbd"==G&&(G="keyboard");for(na in Ab)if(G==na){Ca=Ab[na];oa=!!(a.oa&Ca);break}if(!Ca){a.j("unknown message category: "+G);break a}}if(Ca)if("on"==g[2])a.oa|=Ca,oa=!0;else if("off"==g[2]&&(a.oa&=~Ca,oa=!1,1073741824==Ca)){for(var Yd=0;Yd<a.wa.length;Yd++)a.j(a.wa[Yd]);a.wa=[]}}var Ti=0,Xb="";for(na in Ab)if(!G||G==na){var Ui=
+!!(a.oa&Ab[na]);if(null===oa||oa==Ui)Xb&&(Xb+=","),++Ti%10||(Xb+="\n\t"),"key"==na&&(na="keys"),Xb+=na}void 0===G&&a.j("message commands:\n\tm [category] [on|off]\tturn categories on/off");a.j((null!==oa?oa?"messages on:  ":"messages off: ":"message categories:\n\t")+(Xb||"none"));Ph(a)}break;case "p":if("print"==g[0]){si(a,b.substr(5));break}var Vi="pr"==g[0]?1:0;if(a.S)a.j("step in progress");else{var Pg=Y(a.b.u[7]);a.Gb(Pg);a.S?(a.nb(a.f,Pg,!0),a.ib()||(a.C&&a.C.sb(),a.S=0)):ti(a,Vi?"tr":"t")}break;
+case "r":if("reset"==b){a.C&&a.C.reset();break}di(a,g);break;case "s":a:switch(g[1]){case "base":if(g[2]){var Yb=+g[2];if(8==Yb||10==Yb||16==Yb)a.ca=Yb;else{a.j("invalid base: "+Yb);break}}a.j("default base: "+a.ca);break;case "cs":var Zb;void 0!==g[3]&&(Zb=+g[3]);switch(g[2]){case "int":a.b.xb=Zb;break;case "start":a.b.Jb=Zb;break;case "stop":a.b.yb=Zb;break;default:a.j("unknown cs option");break a}void 0!==Zb&&od(a.b);a.j("checksums "+(a.b.A.wb?"enabled":"disabled"));break;case "sp":void 0!==g[2]&&
+(sd(a.b,+g[2])||a.j("warning: using 1x multiplier, previous target not reached"));a.j("target speed: "+(a.b.ob.toFixed(2)+"Mhz")+" ("+a.b.cb+"x)");break;default:if(g[1]){a.j("unknown option: "+g[1]);break}case "?":a.j("debugger options:"),a.j("\tbase #\t\tset default base to #"),a.j("\tcs int #\tset checksum cycle interval to #"),a.j("\tcs start #\tset checksum cycle start count to #"),a.j("\tcs stop #\tset checksum cycle stop count to #"),a.j("\tsp #\t\tset speed multiplier to #")}break;case "t":ti(a,
+g[0],g[1]);break;case "u":ei(a,g[1],g[2],8);break;case "v":if("var"==g[0]){qi(a,b.substr(3))||(d=!1);break}if("ver"==g[0]){a.j("PDPjs version 1.30.3 ("+a.b.pb+",RELEASE"+(zb?",TYPEDARRAYS":",LONGARRAYS")+")");a.j(window?window.navigator.userAgent:"");break}f=!0;break;case "?":if(g[1]){si(a,b.substr(1));break}var Zd="commands:",$d;for($d in Rh)Zd+="\n"+wa($d,9)+Rh[$d];re(a)||(Zd+="\nnote: history disabled if no exec breakpoints");a.j(Zd);break;default:f=!0}f&&(a.j("unknown command: "+b),d=!1)}}catch(Qg){a.j("debugger error: "+
+(Qg.stack||Qg.message)),d=!1}return d}function qd(a,b,c){b=Gh(a,b,c);for(var d in b)if(!ji(a,b[+d]))return!1;return!0}Za(function(){for(var a=D(document,"pdp11","debugger"),b=0;b<a.length;b++){var c=a[b],d=A(c),d=new Nh(d);B(d,c)}});
+function vi(a,b,c){t.call(this,"Computer",a,vi,67108864);this.A.ia=!1;wi(this,b);this.L=md(this,"autoPower",a);this.C=0;this.X=a.busWidth||a.buswidth;this.f=xi;this.J=null;this.D=this.R=!1;this.$=md(this,"url")||"";(Math.random()+.1).toString(36);this.g=yi(this);if(this.b=tb("CPU",this.id)){this.i=tb("Debugger",this.id);this.v=new mc({id:this.Qa+".bus",busWidth:this.X},this.b,this.i);var d,e=rb(this.id);if((this.B=tb("Panel",this.id))&&this.B.Ra)for(b=0;b<e.length;b++)d=e[b],d.P=this.B.P,d.j=this.B.j,
+d.Ra=this.B.Ra;this.j("PDPjs v1.30.3\nCopyright \u00a9 2012-2016 Jeff Parsons <Jeff@pcjs.org>\nLicense: GPL version 3 or later <http://gnu.org/licenses/gpl.html>");this.j("Portions adapted from the PDP-11/70 Emulator v1.4 by Paul Nankervis <paulnank@hotmail.com>");for(b=0;b<e.length;b++)d=e[b],d.Fa&&d.Fa(this,this.v,this.b,this.i);b=null;d=a.resume;void 0!==d&&(1<d.length?b=this.H=d:this.f=parseInt(d,10));var f;if(a=md(this,"state")||(f=!0,a.state))b=this.M=a,f||(this.D=!0,this.f=xi),this.f&&(this.K=
+new N(this,"1.30.3"),zi(this.K)?b=null:delete this.K);!b&&this.f&&(b=Ai(this))&&(this.D=!0);if(b){var g=this;Da(b,null,!0,function(a,b,c){c?(g.H=null,g.D=!1,g.P("Unable to load machine state from server (error "+c+(b?": "+xa(b):"")+")")):(g.J=b,g.R=!0);H(g)})}else H(this);this.G.power||(this.L=!0);!c&&this.L&&Bi(this,this.Kb)}else q("Unable to find CPU component")}z(vi);var xi=0;
+function wi(a,b){if(!b){var c;if("object"==typeof resources&&(c=resources.parms))try{b=eval("("+c+")")}catch(d){q(d.message+" ("+c+")")}}a.S=b}function md(a,b,c){var d=b.toLowerCase(),d=db[b]||db[d];void 0===d&&a.S&&(d=a.S[b]);void 0===d&&c&&(d=c[b]);void 0===d&&"object"==typeof resources&&resources[b]&&(d=b);return d}function Bi(a,b,c){for(var d=rb(a.id),e=0;e<=d.length;e++){var f=e<d.length?d[e]:a;if(!wb(f)){wb(f,function(){Bi(a,b,c)});return}}b.call(a,c)}
+function Ci(a,b){var c=new N(a,"1.30.3","validate");if(zi(c)&&Di(c)){var d=c.get("timestamp"),e=b?b.get("timestamp"):"unknown";d!=e&&(a.P("Machine state may be out-of-date\n("+d+" vs. "+e+")\nCheck your browser's local storage limits"),b||c.clear())}}k=vi.prototype;
+k.Kb=function(a){void 0===a&&(a=this.f||(this.J?1:xi));if(!this.C){this.C++;var b=!1,c=!1;this.O=!1;var d=this.K||new N(this,"1.30.3");if(-1==a)b=!0;else if(a>xi){if(zi(d,this.J)){this.w=new N(this,"1.30.3","failsafe");zi(this.w)&&(Ei(this,d),a=2,Fi(this.w));this.w.set("timestamp",Ba());Gi(this.w);var e=this.f&&!this.D;if(1==a||Ga("Click OK to restore the previous PDPjs machine state, or CANCEL to reset the machine.")){if(c=Di(d)){var f=d.get("code"),g=d.get("data");f&&("ok"==f?zi(d,g):("error"==
+f&&"no machine state"!=g?(this.P("Error: "+g),"unable to verify user"==g&&(Qa("user",""),this.g=null)):this.j(f+": "+g),Fi(d),zi(d)?(c=Di(d),e=!0):c=!1))}e&&Ci(this,c?d:null)}else 2==a&&d.clear()}else Ci(this);delete this.J;delete this.K}e=rb(this.id);for(f=0;f<e.length;f++)g=e[f],g!==this&&g!=this.b&&(c=Hi(this,g,d,b,c));b=[d,a,c];-1!=a?Bi(this,this.rc,b):this.rc(b)}};
+function Hi(a,b,c,d,e){if(!b.A.ia){b.A.ia=!0;if(b.Ha){var f=null;e&&((f=c.get(b.id))||(f=c.get(b.id.replace(/[a-z0-9]\./i,"."))));"string"===typeof f&&(f=null);!b.Ha(f,d)&&f&&(q("Unable to restore state for "+b.type),a.M&&!a.R?(c.clear(),a.f=xi,window&&window.location.reload()):a.O=!0,b.Ha(null),e=!1)}if(!d&&b.tc)for(a=b.tc.split("|"),c=0;c<a.length;c++)b.status(a[c])}return e}
+k.rc=function(a){var b=a[0],c=0>a[1];a=a[2];this.ca=!0;this.A.ia=!0;var d=this.G.power;d&&(d.textContent="Shutdown");this.b&&(Hi(this,this.b,b,c,a),this.qa(),this.b.tb());this.O&&(Ei(this,b),b.clear());!c&&this.w&&(this.w.clear(),delete this.w);this.C=0};
+function Ei(a,b){if(Ga("There may be a problem with your PDPjs machine.\n\nTo help us diagnose it, click OK to send this PDPjs machine state to http://www.pcjs.org.")){var c=a.g||"";b=b.toString();var d={app:"PDPjs",ver:"1.30.3"};d.url=a.$;d.user=c;d.type="bug";d.data=b;Da("http://www.pcjs.org/api/v1/report",d,!0)}}
+function ui(a,b,c){var d,e="none";if(a.C)return null;a.C--;var f=new N(a,"1.30.3"),g=new N(a,"1.30.3","validate"),h=Ba();g.set("timestamp",h);f.set("timestamp",h);f.set("version","1.30.3");f.set("url",window?window.location.href:null);f.set("browser",window?window.navigator.userAgent:"");a.b&&a.b.Ga&&(c&&a.b.ga(),d=a.b.Ga(b,c),"object"===typeof d&&f.set(a.b.id,d),c&&(a.b.A.ia=!1,!1===d&&(e=null)));for(var h=rb(a.id),l=0;l<h.length;l++){var m=h[l];m.A.ia&&(m.Ga&&(d=m.Ga(b,c),"object"===typeof d&&f.set(m.id,
+d)),c&&(m.A.ia=!1,!1===d&&(e=null)))}e&&(c?(h=d=!1,b?(a.g&&Ii(a,a.g,f.toString()),Gi(g)&&Gi(f)||(e=null,d=h=!0)):a.f&&(d=!0,h=3==a.f),d&&f.clear(h)):e=f.toString());c&&(a.A.ia=!1,b=a.G.power)&&(b.textContent="Power");a.C=0;return e}
+k.reset=function(){this.v&&this.v.reset&&(E(this,"Resetting "+this.v.type),this.v.reset());this.b&&this.b.reset&&(E(this,"Resetting "+this.b.type),this.b.reset());for(var a=rb(this.id),b=0;b<a.length;b++){var c=a[b];c!==this&&c!==this.v&&c!==this.b&&c.reset&&(E(this,"Resetting "+c.type),c.reset())}this.qa(-1)};k.start=function(a,b){for(var c=rb(this.id),d=0;d<c.length;d++){var e=c[d];"CPU"!=e.type&&e!==this&&e.start&&e.start(a,b)}this.qa(-1)};
+k.stop=function(a,b){for(var c=rb(this.id),d=0;d<c.length;d++){var e=c[d];"CPU"!=e.type&&e!==this&&e.stop&&e.stop(a,b)}this.qa(-1)};
+k.qa=function(a){if(this.b){var b=this.b,c=b.G.speed;c&&(c.textContent=b.A.W&&b.$?b.$.toFixed(2)+"Mhz":"Stopped")}if(this.B&&(b=this.B,b.H)){var c=b.b.A.W,d=!!(b.b.I&4);if(!(0<a&&60>(b.K+=a))){for(var e=0;e<b.b.u.length;e++)ac(b,"R"+e,b.b.u[e]);e=Sc(b.b);ac(b,"PS",e);ac(b,"NF",e&8?1:0,1);ac(b,"ZF",e&4?1:0,1);ac(b,"VF",e&2?1:0,1);ac(b,"CF",e&1?1:0,1);b.K=0}hc(b,0<a&&c&&!d?b.b.u[7]:b.f);gc(b,b.D);a=b.b.Ua?b.b.qb&16?1:2:4;jc(b,"B22",a&1);jc(b,"B18",a&2);jc(b,"B16",a&4)}};
+k.ta=function(a,b,c){var d=this;switch(b){case "power":return this.G[b]=c,c.onclick=function(){d.C||(d.A.ia?ui(d,!1,!0):Bi(d,d.Kb))},!0;case "reset":return this.G[b]=c,c.onclick=function(){if(d.A.ia&&!d.C)if(d.f&&!d.H){var a=Ga("Click OK to save changes to this PDPjs machine.\n\nWARNING: If you CANCEL, all disk changes will be discarded.");ui(d,a,!0);!a&&d.M?window&&window.location.reload():(a||(d.sc=!0),d.Kb(xi),d.sc=!1)}else d.reset(),d.b&&d.b.tb()},!0;case "save":if(ta(Fa(),"pcjs.org"))c.parentNode.removeChild(c);
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