diff --git a/modules/pdp11/lib/bus.js b/modules/pdp11/lib/bus.js
index 4f05e514c..b70022215 100644
--- a/modules/pdp11/lib/bus.js
+++ b/modules/pdp11/lib/bus.js
@@ -1356,7 +1356,7 @@ BusPDP11.prototype.addIOTable = function(component, table)
 
         for (var iReg = 0; iReg < nRegs; iReg++, addr += 2) {
             if (sReg && nRegs > 1) sReg = afn[4] + iReg;
-            if (!this.addIOHandlers(addr, addr, fnReadByte, fnWriteByte, fnReadWord, fnWriteWord, component.bitsMessage || MessagesPDP11.BUS, sReg || component.idComponent)) {
+            if (!this.addIOHandlers(addr, addr, fnReadByte, fnWriteByte, fnReadWord, fnWriteWord, afn[7] || component.bitsMessage || MessagesPDP11.BUS, sReg || component.idComponent)) {
                 return false;
             }
         }
diff --git a/modules/pdp11/lib/cpustate.js b/modules/pdp11/lib/cpustate.js
index 0e70fc06f..92ffd26c2 100644
--- a/modules/pdp11/lib/cpustate.js
+++ b/modules/pdp11/lib/cpustate.js
@@ -1577,7 +1577,7 @@ CPUStatePDP11.prototype.mapVirtualToPhysical = function(virtualAddress, accessFl
         /* falls through */
 
     case PDP11.PDR.ACF.RW:      // 0x6: read/write, no system trap/abort action
-        pdr |= ((accessFlags & PDP11.ACCESS.WRITE) ? 0xc0 : 0x80);
+        pdr |= ((accessFlags & PDP11.ACCESS.WRITE) ? (PDP11.PDR.ACCESSED | PDP11.PDR.MODIFIED) : PDP11.PDR.ACCESSED);
         break;
 
     default:                    // 0x0 (non-resident, abort all accesses) or 0x3 or 0x7 (unused, abort all accesses)
diff --git a/modules/pdp11/lib/debugger.js b/modules/pdp11/lib/debugger.js
index 077be096c..3bc0b216f 100644
--- a/modules/pdp11/lib/debugger.js
+++ b/modules/pdp11/lib/debugger.js
@@ -1270,9 +1270,10 @@ if (DEBUGGER) {
         if (this.sMessagePrev && sMessage == this.sMessagePrev) return;
         this.sMessagePrev = sMessage;
 
-        if ((this.bitsMessage & MessagesPDP11.HALT) && this.cpu && this.cpu.isRunning() || this.isBusy(true)) {
+        var fRunning = false;
+        if ((this.bitsMessage & MessagesPDP11.HALT) && this.cpu && (fRunning = this.cpu.isRunning()) || this.isBusy(true)) {
             this.stopCPU();
-            sMessage += " (cpu halted)";
+            if (fRunning) sMessage += " (cpu halted)";
         }
 
         this.println(sMessage); // + " (" + this.cpu.getCycles() + " cycles)"
diff --git a/modules/pdp11/lib/defines.js b/modules/pdp11/lib/defines.js
index 3a2b271b0..fac1d490e 100644
--- a/modules/pdp11/lib/defines.js
+++ b/modules/pdp11/lib/defines.js
@@ -330,21 +330,21 @@ var PDP11 = {
     MMR0: {                     // 177572
         ENABLED:    0x0001,     // 000001 address relocation enabled
         PAGE_NUM:   0x000E,     // 000016 page number of last fault
-        PAGE_D:     0x0010,     // 000020 last fault occurred in D space
+        PAGE_D:     0x0010,     // 000020 last fault occurred in D space (11/44 and 11/70 only)
         PAGE:       0x001E,     // 000176 (all of the PAGE bits)
         MODE:       0x0060,     // 000140 processor mode as of last fault
-        COMPLETED:  0x0080,     // 000200 last instruction completed (R/O)
+        COMPLETED:  0x0080,     // 000200 last instruction completed (R/O) (11/70 only)
         DSTMODE:    0x0100,     // 000400 only destination mode references will be relocated (aka MAINT bit)
-        MMU_TRAPS:  0x0200,     // 001000 enable MMU traps
+        MMU_TRAPS:  0x0200,     // 001000 enable MMU traps (11/70 only)
         UNUSED:     0x0C00,     // 006000
-        TRAP_MMU:   0x1000,     // 010000 trap: MMU
+        TRAP_MMU:   0x1000,     // 010000 trap: MMU (11/70 only)
         ABORT_RO:   0x2000,     // 020000 abort: read-only
         ABORT_PL:   0x4000,     // 040000 abort: page length
         ABORT_NR:   0x8000,     // 100000 abort: non-resident
         ABORT:      0xE000,     // 160000 (all of the ABORT bits)
-        UPDATE:     0xF0FE      // Includes all of: ABORT, TRAP, COMPLETED, MODE, and PAGE bits
+        UPDATE:     0xE0FE      // Includes all of: ABORT, COMPLETED, MODE, and PAGE bits
     },
-    MMR1: {                     // 177574: general purpose auto-inc/auto-dec register
+    MMR1: {                     // 177574: general purpose auto-inc/auto-dec register (11/44 and 11/70 only)
         REG1_NUM:   0x0007,     //
         REG1_DELTA: 0x00F8,     //
         REG2_NUM:   0x0700,     //
@@ -352,7 +352,7 @@ var PDP11 = {
     },
     MMR2: {                     // 177576: virtual program counter register
     },
-    MMR3: {                     // 172516: mapping register
+    MMR3: {                     // 172516: mapping register (11/44 and 11/70 only)
         USER_D:     0x0001,
         SUPER_D:    0x0002,
         KERNEL_D:   0x0004,
diff --git a/modules/pdp11/lib/device.js b/modules/pdp11/lib/device.js
index c1c808337..334e36c90 100644
--- a/modules/pdp11/lib/device.js
+++ b/modules/pdp11/lib/device.js
@@ -1130,23 +1130,23 @@ DevicePDP11.prototype.writeIgnored = function(data, addr)
  */
 DevicePDP11.UNIBUS_IOTABLE = {
     [PDP11.UNIBUS.UNIMAP]:  /* 170200 */    [null, null, DevicePDP11.prototype.readUNIMAP,  DevicePDP11.prototype.writeUNIMAP,  "UNIMAP",   64, PDP11.MODEL_1170],
-    [PDP11.UNIBUS.SIPDR0]:  /* 172200 */    [null, null, DevicePDP11.prototype.readSIPDR,   DevicePDP11.prototype.writeSIPDR,   "SIPDR",    8,  PDP11.MODEL_1145],
-    [PDP11.UNIBUS.SDPDR0]:  /* 172220 */    [null, null, DevicePDP11.prototype.readSDPDR,   DevicePDP11.prototype.writeSDPDR,   "SDPDR",    8,  PDP11.MODEL_1145],
-    [PDP11.UNIBUS.SIPAR0]:  /* 172240 */    [null, null, DevicePDP11.prototype.readSIPAR,   DevicePDP11.prototype.writeSIPAR,   "SIPAR",    8,  PDP11.MODEL_1145],
-    [PDP11.UNIBUS.SDPAR0]:  /* 172260 */    [null, null, DevicePDP11.prototype.readSDPAR,   DevicePDP11.prototype.writeSDPAR,   "SDPAR",    8,  PDP11.MODEL_1145],
-    [PDP11.UNIBUS.KIPDR0]:  /* 172300 */    [null, null, DevicePDP11.prototype.readKIPDR,   DevicePDP11.prototype.writeKIPDR,   "KIPDR",    8,  PDP11.MODEL_1145],
-    [PDP11.UNIBUS.KDPDR0]:  /* 172320 */    [null, null, DevicePDP11.prototype.readKDPDR,   DevicePDP11.prototype.writeKDPDR,   "KDPDR",    8,  PDP11.MODEL_1145],
-    [PDP11.UNIBUS.KIPAR0]:  /* 172340 */    [null, null, DevicePDP11.prototype.readKIPAR,   DevicePDP11.prototype.writeKIPAR,   "KIPAR",    8,  PDP11.MODEL_1145],
-    [PDP11.UNIBUS.KDPAR0]:  /* 172360 */    [null, null, DevicePDP11.prototype.readKDPAR,   DevicePDP11.prototype.writeKDPAR,   "KDPAR",    8,  PDP11.MODEL_1145],
-    [PDP11.UNIBUS.MMR3]:    /* 172516 */    [null, null, DevicePDP11.prototype.readMMR3,    DevicePDP11.prototype.writeMMR3,    "MMR3",     1,  PDP11.MODEL_1145],
+    [PDP11.UNIBUS.SIPDR0]:  /* 172200 */    [null, null, DevicePDP11.prototype.readSIPDR,   DevicePDP11.prototype.writeSIPDR,   "SIPDR",    8,  PDP11.MODEL_1145, MessagesPDP11.MMU],
+    [PDP11.UNIBUS.SDPDR0]:  /* 172220 */    [null, null, DevicePDP11.prototype.readSDPDR,   DevicePDP11.prototype.writeSDPDR,   "SDPDR",    8,  PDP11.MODEL_1145, MessagesPDP11.MMU],
+    [PDP11.UNIBUS.SIPAR0]:  /* 172240 */    [null, null, DevicePDP11.prototype.readSIPAR,   DevicePDP11.prototype.writeSIPAR,   "SIPAR",    8,  PDP11.MODEL_1145, MessagesPDP11.MMU],
+    [PDP11.UNIBUS.SDPAR0]:  /* 172260 */    [null, null, DevicePDP11.prototype.readSDPAR,   DevicePDP11.prototype.writeSDPAR,   "SDPAR",    8,  PDP11.MODEL_1145, MessagesPDP11.MMU],
+    [PDP11.UNIBUS.KIPDR0]:  /* 172300 */    [null, null, DevicePDP11.prototype.readKIPDR,   DevicePDP11.prototype.writeKIPDR,   "KIPDR",    8,  PDP11.MODEL_1145, MessagesPDP11.MMU],
+    [PDP11.UNIBUS.KDPDR0]:  /* 172320 */    [null, null, DevicePDP11.prototype.readKDPDR,   DevicePDP11.prototype.writeKDPDR,   "KDPDR",    8,  PDP11.MODEL_1145, MessagesPDP11.MMU],
+    [PDP11.UNIBUS.KIPAR0]:  /* 172340 */    [null, null, DevicePDP11.prototype.readKIPAR,   DevicePDP11.prototype.writeKIPAR,   "KIPAR",    8,  PDP11.MODEL_1145, MessagesPDP11.MMU],
+    [PDP11.UNIBUS.KDPAR0]:  /* 172360 */    [null, null, DevicePDP11.prototype.readKDPAR,   DevicePDP11.prototype.writeKDPAR,   "KDPAR",    8,  PDP11.MODEL_1145, MessagesPDP11.MMU],
+    [PDP11.UNIBUS.MMR3]:    /* 172516 */    [null, null, DevicePDP11.prototype.readMMR3,    DevicePDP11.prototype.writeMMR3,    "MMR3",     1,  PDP11.MODEL_1145, MessagesPDP11.MMU],
     [PDP11.UNIBUS.LKS]:     /* 177546 */    [null, null, DevicePDP11.prototype.readLKS,     DevicePDP11.prototype.writeLKS,     "LKS"],
-    [PDP11.UNIBUS.MMR0]:    /* 177572 */    [null, null, DevicePDP11.prototype.readMMR0,    DevicePDP11.prototype.writeMMR0,    "MMR0",     1,  PDP11.MODEL_1145],
-    [PDP11.UNIBUS.MMR1]:    /* 177574 */    [null, null, DevicePDP11.prototype.readMMR1,    DevicePDP11.prototype.writeIgnored, "MMR1",     1,  PDP11.MODEL_1145],
-    [PDP11.UNIBUS.MMR2]:    /* 177576 */    [null, null, DevicePDP11.prototype.readMMR2,    DevicePDP11.prototype.writeIgnored, "MMR2",     1,  PDP11.MODEL_1145],
-    [PDP11.UNIBUS.UIPDR0]:  /* 177600 */    [null, null, DevicePDP11.prototype.readUIPDR,   DevicePDP11.prototype.writeUIPDR,   "UIPDR",    8,  PDP11.MODEL_1145],
-    [PDP11.UNIBUS.UDPDR0]:  /* 177620 */    [null, null, DevicePDP11.prototype.readUDPDR,   DevicePDP11.prototype.writeUDPDR,   "UDPDR",    8,  PDP11.MODEL_1145],
-    [PDP11.UNIBUS.UIPAR0]:  /* 177640 */    [null, null, DevicePDP11.prototype.readUIPAR,   DevicePDP11.prototype.writeUIPAR,   "UIPAR",    8,  PDP11.MODEL_1145],
-    [PDP11.UNIBUS.UDPAR0]:  /* 177660 */    [null, null, DevicePDP11.prototype.readUDPAR,   DevicePDP11.prototype.writeUDPAR,   "UDPAR",    8,  PDP11.MODEL_1145],
+    [PDP11.UNIBUS.MMR0]:    /* 177572 */    [null, null, DevicePDP11.prototype.readMMR0,    DevicePDP11.prototype.writeMMR0,    "MMR0",     1,  PDP11.MODEL_1145, MessagesPDP11.MMU],
+    [PDP11.UNIBUS.MMR1]:    /* 177574 */    [null, null, DevicePDP11.prototype.readMMR1,    DevicePDP11.prototype.writeIgnored, "MMR1",     1,  PDP11.MODEL_1145, MessagesPDP11.MMU],
+    [PDP11.UNIBUS.MMR2]:    /* 177576 */    [null, null, DevicePDP11.prototype.readMMR2,    DevicePDP11.prototype.writeIgnored, "MMR2",     1,  PDP11.MODEL_1145, MessagesPDP11.MMU],
+    [PDP11.UNIBUS.UIPDR0]:  /* 177600 */    [null, null, DevicePDP11.prototype.readUIPDR,   DevicePDP11.prototype.writeUIPDR,   "UIPDR",    8,  PDP11.MODEL_1145, MessagesPDP11.MMU],
+    [PDP11.UNIBUS.UDPDR0]:  /* 177620 */    [null, null, DevicePDP11.prototype.readUDPDR,   DevicePDP11.prototype.writeUDPDR,   "UDPDR",    8,  PDP11.MODEL_1145, MessagesPDP11.MMU],
+    [PDP11.UNIBUS.UIPAR0]:  /* 177640 */    [null, null, DevicePDP11.prototype.readUIPAR,   DevicePDP11.prototype.writeUIPAR,   "UIPAR",    8,  PDP11.MODEL_1145, MessagesPDP11.MMU],
+    [PDP11.UNIBUS.UDPAR0]:  /* 177660 */    [null, null, DevicePDP11.prototype.readUDPAR,   DevicePDP11.prototype.writeUDPAR,   "UDPAR",    8,  PDP11.MODEL_1145, MessagesPDP11.MMU],
     [PDP11.UNIBUS.R0SET0]:  /* 177700 */    [null, null, DevicePDP11.prototype.readRSET0,   DevicePDP11.prototype.writeRSET0,   "R0SET0"],
     [PDP11.UNIBUS.R1SET0]:  /* 177701 */    [null, null, DevicePDP11.prototype.readRSET0,   DevicePDP11.prototype.writeRSET0,   "R1SET0"],
     [PDP11.UNIBUS.R2SET0]:  /* 177702 */    [null, null, DevicePDP11.prototype.readRSET0,   DevicePDP11.prototype.writeRSET0,   "R2SET0"],
diff --git a/versions/pdpjs/1.30.3/pdp11-dbg.js b/versions/pdpjs/1.30.3/pdp11-dbg.js
index d812dd99c..a6a887507 100644
--- a/versions/pdpjs/1.30.3/pdp11-dbg.js
+++ b/versions/pdpjs/1.30.3/pdp11-dbg.js
@@ -78,7 +78,7 @@ function yc(a,b,c){var d=[];for(b>>>=a.ka;0<c&&b<a.Y.length;)d.push(a.Y[b++]),c-
 k.ma=function(a){3932160<=a&&(a=Ec(this.b,a));return this.Y[(a&this.Qa)>>>this.ka].sa(a&this.v,a)};k.fb=function(a){3932160<=a&&(a=Ec(this.b,a));var b=a&this.v,c=(a&this.Qa)>>>this.ka;this.f=!1;this.na++;a=this.Y[c].mc(b,a);this.na--;return a};k.Eb=function(a,b){3932160<=a&&(a=Ec(this.b,a));this.Y[(a&this.Qa)>>>this.ka].cc(a&this.v,b&255,a)};k.tb=function(a,b){3932160<=a&&(a=Ec(this.b,a));this.f=!1;this.na++;this.Y[(a&this.Qa)>>>this.ka].dc(a&this.v,b&255,a);this.na--};
 k.ib=function(a,b){3932160<=a&&(a=Ec(this.b,a));this.Y[(a&this.Qa)>>>this.ka].Ub(a&this.v,b&65535,a)};k.Fb=function(a,b){3932160<=a&&(a=Ec(this.b,a));var c=a&this.v,d=(a&this.Qa)>>>this.ka;this.f=!1;this.na++;this.Y[d].pc(c,b&65535,a);this.na--};
 function Fc(a){for(var b=0,c=[],d=0;d<a.D;d++){var e=a.Y[d];if(e.Wa||e.Vc){c[b++]=d;var f=b++;if(e=e.save()){for(var g=0,h=0,l=[];g<e.length;){for(var m=e[g],n=g+1;n<e.length&&e[n]===m;)n++;l[h++]=n-g;l[h++]=m;g=n}l.length<e.length&&(e=l)}c[f]=e}}return c}function Gc(a,b,c,d,e,f,g,h,l){for(;b<=c;b+=2){var m=b&vc;if(void 0!==a.cb[m])return q("I/O address already registered: "+p(b,8,!0)),!1;a.cb[m]=[d,e,f,g,l||"unknown",h,!1]}return!0}
-function Ib(a,b,c){for(var d in c){var e=+d,f=c[d];if(!(f[6]&&f[6]>a.b.Xa)){var g=f[0]?f[0].bind(b):null,h=f[1]?f[1].bind(b):null,l=f[2]?f[2].bind(b):null,m=f[3]?f[3].bind(b):null;65472<=e&&65487>=e&&(!g&&l&&(g=function(a){return function(b){return a(b)&255}.bind(b)}(l)),!h&&m&&(h=function(a){return function(b,c){return a(b,c)}.bind(b)}(m)));for(var n=f[4],v=f[5]||1,r=0;r<v;r++,e+=2)if(n&&1<v&&(n=f[4]+r),!Gc(a,e,e,g,h,l,m,b.la||64,n||b.ab))return!1}}return!0}function Kb(a,b){a.B.push(b)}
+function Ib(a,b,c){for(var d in c){var e=+d,f=c[d];if(!(f[6]&&f[6]>a.b.Xa)){var g=f[0]?f[0].bind(b):null,h=f[1]?f[1].bind(b):null,l=f[2]?f[2].bind(b):null,m=f[3]?f[3].bind(b):null;65472<=e&&65487>=e&&(!g&&l&&(g=function(a){return function(b){return a(b)&255}.bind(b)}(l)),!h&&m&&(h=function(a){return function(b,c){return a(b,c)}.bind(b)}(m)));for(var n=f[4],v=f[5]||1,r=0;r<v;r++,e+=2)if(n&&1<v&&(n=f[4]+r),!Gc(a,e,e,g,h,l,m,f[7]||b.la||64,n||b.ab))return!1}}return!0}function Kb(a,b){a.B.push(b)}
 k.Ha=function(a,b,c){this.f=!0;this.na||(this.j&&F(this.j,32)&&E(this.j,"memory fault ("+c+") on "+J(this.j,a),!0,!0),b&&(this.b.ua|=b),this.b.wa(4,0,a))};function Hc(a){var b=a.f;a.f=!1;return b}function Bc(a,b,c){q("Memory block error ("+a+": "+p(b)+","+p(c)+")");return!1}function K(a){t.call(this,"Device",a,K,1024);this.f={fa:0,oc:-1}}z(K);k=K.prototype;
 k.Ia=function(a,b,c,d){this.v=b;this.C=a;this.b=c;this.j=d;var e=this;this.f.oc=Ic(c,function(){e.f.Nb|=128;e.f.Nb&64&&Jc(e.b,e.f.fe);e.C&&e.C.qa(1);Kc(e.b,e.f.oc,1E3/60)});this.f.fe=Tc(64,6);Ib(b,this,Uc);Kb(b,this.reset.bind(this));d&&Vc(d,256,function(a){var b=e.b;L(e,"KIPDR",b.P[0],0,a[0]);L(e,"KDPDR",b.P[0],8,a[0]);L(e,"KIPAR",b.ha[0],0,a[0]);L(e,"KDPAR",b.ha[0],8,a[0],!0);L(e,"SIPDR",b.P[1],0,a[0]);L(e,"SDPDR",b.P[1],8,a[0]);L(e,"SIPAR",b.ha[1],0,a[0]);L(e,"SDPAR",b.ha[1],8,a[0],!0);L(e,"UIPDR",
 b.P[3],0,a[0]);L(e,"UDPDR",b.P[3],8,a[0]);L(e,"UIPAR",b.ha[3],0,a[0]);L(e,"UDPAR",b.ha[3],8,a[0],!0)});H(this)};function L(a,b,c,d,e,f){a=a.j;if(!(e&&0>b.indexOf(e.toUpperCase()))){b+=":";for(e=0;8>e;e++)b+=" "+J(a,c[d+e]);a.i(b+(f?"\n":""))}}k.reset=function(){this.f.Nb=128;Kc(this.b,this.f.oc,1E3/60,!0)};k.vd=function(){return this.f.Nb};k.pe=function(a){this.f.Nb=a&192};k.xd=function(){return Wc(this.b)};k.re=function(a){Xc(this.b,a&-129|this.b.Da&128)};k.yd=function(){return Yc(this.b)};
@@ -89,13 +89,13 @@ k.Re=function(a,b){b=b>>1&7;this.b.ha[3][b]=a;this.b.P[3][b]&=65295};k.Xd=functi
 k.Ae=function(a){this.b.u[7]=a};k.Db=function(a){a&=7;return this.b.N&2048?this.b.u[a]:this.b.Za[a]};k.Hb=function(a,b){b&=7;this.b.N&2048?this.b.u[b]=a:this.b.Za[b]=a};k.Gd=function(){return 1==(this.b.N&49152)>>14?this.b.u[6]:this.b.La[1]};k.ye=function(a){1==(this.b.N&49152)>>14?this.b.u[6]=a:this.b.La[1]=a};k.Hd=function(){return 3==(this.b.N&49152)>>14?this.b.u[6]:this.b.La[3]};k.ze=function(a){3==(this.b.N&49152)>>14?this.b.u[6]=a:this.b.La[3]=a};k.pd=function(a){return this.b.Jc[a-65504>>1]};
 k.je=function(a,b){this.b.Jc[b-65504>>1]=a};k.Gc=function(a){if(65520==a){a=0;switch(Cc){case Cc:a=this.v.gc}a=(a>>6)-1}else a=0;return a};k.Nc=function(){};k.Wd=function(){return 1};k.Oe=function(){};k.od=function(){return this.b.ua};k.ie=function(){this.b.ua=0};k.wd=function(){return this.b.Ic};k.qe=function(a,b){b&1||(a&=255);this.b.Ic=a};k.Bd=function(a,b){return b?0:this.b.Rb};k.te=function(a){ad(this.b,a)};k.Vd=function(a,b){return b?0:this.b.sb&65280};k.Ne=function(a){this.b.sb=a|255};
 k.Ed=function(){return bd(this.b)};k.we=function(a){cd(this.b,a&-1793|bd(this.b)&1792);this.b.J|=128};k.Mc=function(a,b){F(this)&&E(this,"writeIgnored("+na(b)+"): "+na(a),!0,!0)};
-var M={},Uc=(M[61568]=[null,null,K.prototype.ae,K.prototype.Te,"UNIMAP",64,1170],M[62592]=[null,null,K.prototype.Ud,K.prototype.Me,"SIPDR",8,1145],M[62608]=[null,null,K.prototype.Sd,K.prototype.Ke,"SDPDR",8,1145],M[62624]=[null,null,K.prototype.Td,K.prototype.Le,"SIPAR",8,1145],M[62640]=[null,null,K.prototype.Rd,K.prototype.Je,"SDPAR",8,1145],M[62656]=[null,null,K.prototype.ud,K.prototype.oe,"KIPDR",8,1145],M[62672]=[null,null,K.prototype.sd,K.prototype.me,"KDPDR",8,1145],M[62688]=[null,null,K.prototype.td,
-K.prototype.ne,"KIPAR",8,1145],M[62704]=[null,null,K.prototype.rd,K.prototype.le,"KDPAR",8,1145],M[62798]=[null,null,K.prototype.Ad,K.prototype.se,"MMR3",1,1145],M[65382]=[null,null,K.prototype.vd,K.prototype.pe,"LKS"],M[65402]=[null,null,K.prototype.xd,K.prototype.re,"MMR0",1,1145],M[65404]=[null,null,K.prototype.yd,K.prototype.Mc,"MMR1",1,1145],M[65406]=[null,null,K.prototype.zd,K.prototype.Mc,"MMR2",1,1145],M[65408]=[null,null,K.prototype.$d,K.prototype.Se,"UIPDR",8,1145],M[65424]=[null,null,K.prototype.Yd,
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-if(Ab){var fd=new ArrayBuffer(2);(new DataView(fd)).setUint16(0,256,!0);ed=256===(new Uint16Array(fd))[0]}else ed=!1;var gd=ed;
+var M={},Uc=(M[61568]=[null,null,K.prototype.ae,K.prototype.Te,"UNIMAP",64,1170],M[62592]=[null,null,K.prototype.Ud,K.prototype.Me,"SIPDR",8,1145,256],M[62608]=[null,null,K.prototype.Sd,K.prototype.Ke,"SDPDR",8,1145,256],M[62624]=[null,null,K.prototype.Td,K.prototype.Le,"SIPAR",8,1145,256],M[62640]=[null,null,K.prototype.Rd,K.prototype.Je,"SDPAR",8,1145,256],M[62656]=[null,null,K.prototype.ud,K.prototype.oe,"KIPDR",8,1145,256],M[62672]=[null,null,K.prototype.sd,K.prototype.me,"KDPDR",8,1145,256],
+M[62688]=[null,null,K.prototype.td,K.prototype.ne,"KIPAR",8,1145,256],M[62704]=[null,null,K.prototype.rd,K.prototype.le,"KDPAR",8,1145,256],M[62798]=[null,null,K.prototype.Ad,K.prototype.se,"MMR3",1,1145,256],M[65382]=[null,null,K.prototype.vd,K.prototype.pe,"LKS"],M[65402]=[null,null,K.prototype.xd,K.prototype.re,"MMR0",1,1145,256],M[65404]=[null,null,K.prototype.yd,K.prototype.Mc,"MMR1",1,1145,256],M[65406]=[null,null,K.prototype.zd,K.prototype.Mc,"MMR2",1,1145,256],M[65408]=[null,null,K.prototype.$d,
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+"SYSID",1,1170],M[65526]=[null,null,K.prototype.od,K.prototype.ie,"CPUERR",1,1170],M[65528]=[null,null,K.prototype.wd,K.prototype.qe,"MB",1,1170],M[65530]=[null,null,K.prototype.Bd,K.prototype.te,"PIR"],M[65532]=[null,null,K.prototype.Vd,K.prototype.Ne,"SL"],M[65534]=[null,null,K.prototype.Ed,K.prototype.we,"PSW"],M);
+$a(function(){for(var a=D(document,"pdp11","device"),b=0;b<a.length;b++){var c,d=a[b];c=A(d);switch(c.type){case "default":c=new K(c);B(c,d);break;case "pc11":c=new dd(c);B(c,d);break;case "rl11":c=new N(c),B(c,d)}}});var ed;if(Ab){var fd=new ArrayBuffer(2);(new DataView(fd)).setUint16(0,256,!0);ed=256===(new Uint16Array(fd))[0]}else ed=!1;var gd=ed;
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@@ -127,7 +127,7 @@ function cd(a,b){a.Z=b<<12;a.$=~b&4;a.V=b<<14;a.U=b<<16;if((b^a.N)&2048)for(var
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 k.Fb=function(a,b){this.L?(this.M++,this.Oc(ue(this,a,4),b),this.M--):this.v.Fb(a,b)};k.Xc=function(a,b,c){return xe(this,a,b,c)};k.Yc=function(a,b,c){return ue(this,xe(this,a,b,c),c)};k.Hc=function(a){return this.v.ma(this.Mb=a)};k.be=function(a){return this.v.ma(this.Mb=ue(this,a,2))};k.Oc=function(a,b){this.v.ib(this.Mb=a,b&65535)};k.Ue=function(a,b){this.v.ib(this.Mb=ue(this,a,4),b)};
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-k.message=function(a,b){b&&(a+=" @"+J(this,Y(this.b.pa&65535).F));if(this.la&1073741824)this.za.push(a);else if(!this.ja||a!=this.ja){this.ja=a;if(this.la&-2147483648&&this.b&&this.b.A.W||wb(this,!0))this.da(),a+=" (cpu halted)";this.i(a);this.b&&(a=this.b,Ed(a),a.za=0,a.qa())}};
+k.message=function(a,b){b&&(a+=" @"+J(this,Y(this.b.pa&65535).F));if(this.la&1073741824)this.za.push(a);else if(!this.ja||a!=this.ja){this.ja=a;b=!1;if(this.la&-2147483648&&this.b&&(b=this.b.A.W)||wb(this,!0))this.da(),b&&(a+=" (cpu halted)");this.i(a);this.b&&(a=this.b,Ed(a),a.za=0,a.qa())}};
 function fi(a){var b;if(!He(a))a.H&&a.H.length&&a.i("instruction history buffer freed"),a.ba=0,a.H=[];else if(!a.H||!a.H.length){a.H=Array(1E3);for(b=0;b<a.H.length;b++)a.H[b]=Y();a.ba=0;a.i("instruction history buffer allocated")}}k.jb=function(a,b){if(!ti(this,b))return!1;this.b.jb(a);return!0};
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 function zd(a,b){if(a.lb){void 0===b&&(b=!0);var c;c=a.b;if(c=c.J&8?c.md|c.ld<<8:0){var d=c>>8;a.i("trapped to "+J(a,c&255,1)+" ("+(0>d?Bb[-d]:J(a,d))+")")}a.L=Y(a.b.u[7]);b&&1!=a.O?ui(a):vi(a)}}function ti(a,b){var c;(c=!a.b||!xb(a.b))||(c=a.b,c.A.ia?c=!0:(c.i(c.toString()+" not powered"),c=!1),c=!c);return c||a.b.A.W?(b||a.i("cpu busy or unavailable, command ignored"),!1):!yb(a.b)}k.Ka=function(a,b){return!b&&(this.reset(!0),a&&this.restore&&!this.restore(a))?!1:!0};
diff --git a/versions/pdpjs/1.30.3/pdp11.js b/versions/pdpjs/1.30.3/pdp11.js
index aea886e10..09a54c6de 100644
--- a/versions/pdpjs/1.30.3/pdp11.js
+++ b/versions/pdpjs/1.30.3/pdp11.js
@@ -72,7 +72,7 @@ function Fb(a,b,c,d,e){for(var f=b,g=c,k=f>>>a.c;0<g&&k<a.h.length;){var l=a.h[k
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