From 44a2ec9f03ff4c200f9f34f1e5c48d03d9833ace Mon Sep 17 00:00:00 2001
From: Jeff <Jeff@pcjs.org>
Date: Thu, 29 Sep 2016 09:11:25 -0700
Subject: [PATCH] Fixed Debugger memory editing and register handling, tidied
 up some flag operations, and removed more now-unnecessary address checks in
 cpustate

---
 modules/pdp11/lib/cpuops.js        | 149 +++++------
 modules/pdp11/lib/cpustate.js      | 129 +++++-----
 modules/pdp11/lib/debugger.js      | 142 ++++++++---
 modules/pdp11/lib/defines.js       |   3 +-
 modules/shared/lib/debugger.js     |   4 +-
 versions/c1pjs/1.30.0/c1p-dbg.js   |  58 ++---
 versions/c1pjs/1.30.0/c1p.js       |  36 +--
 versions/pdp11/1.30.0/pdp11-dbg.js | 396 +++++++++++++++--------------
 versions/pdp11/1.30.0/pdp11.js     | 192 +++++++-------
 9 files changed, 583 insertions(+), 526 deletions(-)

diff --git a/modules/pdp11/lib/cpuops.js b/modules/pdp11/lib/cpuops.js
index 597f0cc88..d9f030947 100644
--- a/modules/pdp11/lib/cpuops.js
+++ b/modules/pdp11/lib/cpuops.js
@@ -39,18 +39,19 @@ if (NODE) {
 
 /*
  * Decoding starts at the bottom of this file, in op1170().  The basic decoding approach is to
- * dispatch on the top 4 bits of the opcode, and if further decoding is required, then dispatch on
- * the next 4 bits, and so on (although some of the intermediate levels dispatch only on 2 bits).
+ * dispatch on the top 4 bits of the opcode, and if further decoding is required, the dispatched
+ * function will dispatch on the next 4 bits, and so on (although some of the intermediate levels
+ * dispatch only on 2 bits, which could also handled with a switch statement).
  *
  * Eventually, every opcode should end up either in an opXXX() function or opUndefined().  For
- * opcodes that perform a simple read and/or write operation, the entire functionality is handled
- * by the opXXX() function.  For opcodes that perform a more extensive read/modify/write operation
+ * opcodes that perform a simple read and/or write operation, the entire operation is handled by
+ * the opXXX() function.  For opcodes that perform a more extensive read/modify/write operation
  * (also known as an update operation), those opXXX() functions usually rely on a corresponding
  * fnXXX() helper function.
  *
  * For example, opADD() passes the helper function fnADD() to the appropriate update method.  This
  * allows the update method to perform the entire read/modify/write operation, because the modification
- * is handled by the helper function.
+ * is performed internally via the helper function.
  */
 
 /**
@@ -94,7 +95,7 @@ PDP11.fnADDB = function(src, dst)
 PDP11.fnASL = function(src, dst)
 {
     var result = dst << 1;
-    this.updateLogFlags(result);
+    this.updateShiftFlags(result);
     return result & 0xffff;
 };
 
@@ -109,7 +110,7 @@ PDP11.fnASL = function(src, dst)
 PDP11.fnASLB = function(src, dst)
 {
     var result = dst << 1;
-    this.updateLogFlags(result << 8);
+    this.updateShiftFlags(result << 8);
     return result & 0xff;
 };
 
@@ -124,7 +125,7 @@ PDP11.fnASLB = function(src, dst)
 PDP11.fnASR = function(src, dst)
 {
     var result = (dst & 0x8000) | (dst >> 1) | (dst << 16);
-    this.updateLogFlags(result);
+    this.updateShiftFlags(result);
     return result & 0xffff;
 };
 
@@ -139,7 +140,7 @@ PDP11.fnASR = function(src, dst)
 PDP11.fnASRB = function(src, dst)
 {
     var result = (dst & 0x800) | (dst >> 1) | (dst << 8);
-    this.updateLogFlags(result << 8);
+    this.updateShiftFlags(result << 8);
     return result & 0xff;
 };
 
@@ -214,7 +215,7 @@ PDP11.fnBISB = function(src, dst)
 PDP11.fnCOM = function(src, dst)
 {
     var result = ~dst | 0x10000;
-    this.updateNZCFlags(result);
+    this.updateAllFlags(result);
     return result & 0xffff;
 };
 
@@ -229,7 +230,7 @@ PDP11.fnCOM = function(src, dst)
 PDP11.fnCOMB = function(src, dst)
 {
     var result = ~dst | 0x100;
-    this.updateNZCFlags(result << 8);
+    this.updateAllFlags(result << 8);
     return result & 0xff;
 };
 
@@ -307,7 +308,7 @@ PDP11.fnNEG = function(src, dst)
     /*
      * If the sign bit of both dst and result are set, the original value must have been 0x8000, triggering overflow.
      */
-    this.updateNZCFlags(result, result & dst & 0x8000);
+    this.updateAllFlags(result, result & dst & 0x8000);
     return result & 0xffff;
 };
 
@@ -325,7 +326,7 @@ PDP11.fnNEGB = function(src, dst)
     /*
      * If the sign bit of both dst and result are set, the original value must have been 0x80, which triggers overflow.
      */
-    this.updateNZCFlags(result << 8, (result & dst & 0x80) << 8);
+    this.updateAllFlags(result << 8, (result & dst & 0x80) << 8);
     return result & 0xff;
 };
 
@@ -340,7 +341,7 @@ PDP11.fnNEGB = function(src, dst)
 PDP11.fnROL = function(src, dst)
 {
     var result = (dst << 1) | ((this.flagC >> 16) & 1);
-    this.updateLogFlags(result);
+    this.updateShiftFlags(result);
     return result & 0xffff;
 };
 
@@ -355,7 +356,7 @@ PDP11.fnROL = function(src, dst)
 PDP11.fnROLB = function(src, dst)
 {
     var result = (dst << 1) | ((this.flagC >> 16) & 1);
-    this.updateLogFlags(result << 8);
+    this.updateShiftFlags(result << 8);
     return result & 0xff;
 };
 
@@ -370,7 +371,7 @@ PDP11.fnROLB = function(src, dst)
 PDP11.fnROR = function(src, dst)
 {
     var result = (((this.flagC & 0x10000) | dst) >> 1) | (dst << 16);
-    this.updateLogFlags(result);
+    this.updateShiftFlags(result);
     return result & 0xffff;
 };
 
@@ -385,7 +386,7 @@ PDP11.fnROR = function(src, dst)
 PDP11.fnRORB = function(src, dst)
 {
     var result = ((((this.flagC & 0x10000) >> 8) | dst) >> 1) | (dst << 8);
-    this.updateLogFlags(result << 8);
+    this.updateShiftFlags(result << 8);
     return result & 0xff;
 };
 
@@ -867,7 +868,7 @@ PDP11.opBVS = function(opCode)
  */
 PDP11.opCLR = function(opCode)
 {
-    this.updateNZCFlags(this.writeWordByMode(opCode, 0));
+    this.updateAllFlags(this.writeWordByMode(opCode, 0));
     this.nStepCycles -= 1;
 };
 
@@ -879,7 +880,7 @@ PDP11.opCLR = function(opCode)
  */
 PDP11.opCLRB = function(opCode)
 {
-    this.updateNZCFlags(this.writeByteByMode(opCode, 0));
+    this.updateAllFlags(this.writeByteByMode(opCode, 0));
     this.nStepCycles -= 1;
 };
 
@@ -1040,6 +1041,9 @@ PDP11.opDECB = function(opCode)
  */
 PDP11.opDIV = function(opCode)
 {
+    /*
+     * TODO: Review and determine if flag updates can be encapsulated in an updateDivFlags() function.
+     */
     var src = this.readWordByMode(opCode);
     if (!src) {
         this.flagN = 0;         // NZVC
@@ -1159,7 +1163,7 @@ PDP11.opJSR = function(opCode)
  */
 PDP11.opMARK = function(opCode)
 {
-    var addr = (this.regsGen[7] + ((opCode & 0x3F) << 1)) & 0xffff;
+    var addr = (this.regsGen[PDP11.REG.PC] + ((opCode & 0x3F) << 1)) & 0xffff;
     var src = this.readWordFromVirtual(addr | 0x10000);
     this.setPC(this.regsGen[5]);
     this.setSP(addr + 2);
@@ -1264,10 +1268,7 @@ PDP11.opMUL = function(opCode)
     var result = ~~(src * dst);
     this.regsGen[reg] = (result >> 16) & 0xffff;
     this.regsGen[reg | 1] = result & 0xffff;
-    this.flagN = result >> 16;
-    this.flagZ = this.flagN | result;
-    this.flagV = 0;
-    this.flagC = (result < -32768 || result > 32767)? 0x10000 : 0;
+    this.updateMulFlags(result);
     this.nStepCycles -= 1;
 };
 
@@ -1511,7 +1512,7 @@ PDP11.opSOB = function(opCode)
 {
     var reg = (opCode & PDP11.SRCMODE.REG) >> PDP11.SRCMODE.SHIFT;
     if ((this.regsGen[reg] = ((this.regsGen[reg] - 1) & 0xffff))) {
-        this.setPC(this.regsGen[7] - ((opCode & 0x3F) << 1));
+        this.setPC(this.regsGen[PDP11.REG.PC] - ((opCode & 0x3F) << 1));
     }
     this.nStepCycles -= 1;
 };
@@ -1578,7 +1579,7 @@ PDP11.opTST = function(opCode)
 {
     var result = this.readWordByMode(opCode);
     this.assert(!(result & ~0xffff));   // assert that C flag will be clear
-    this.updateNZCFlags(result);
+    this.updateAllFlags(result);
     this.nStepCycles -= 1;
 };
 
@@ -1592,7 +1593,7 @@ PDP11.opTSTB = function(opCode)
 {
     var result = this.readByteByMode(opCode);
     this.assert(!(result & ~0xff));     // assert that C flag will be clear
-    this.updateNZCFlags(result << 8);
+    this.updateAllFlags(result << 8);
     this.nStepCycles -= 1;
 };
 
@@ -1643,45 +1644,45 @@ PDP11.op0Xnn_1170 = function(opCode)
 };
 
 /**
- * op0Ann_1170(opCode)
+ * op0AXn_1170(opCode)
  *
  * @this {CPUStatePDP11}
  * @param {number} opCode
  */
-PDP11.op0Ann_1170 = function(opCode)
+PDP11.op0AXn_1170 = function(opCode)
 {
     PDP11.aOps0AXn_1170[(opCode >> 6) & 0x3].call(this, opCode);
 };
 
 /**
- * op0Bnn_1170(opCode)
+ * op0BXn_1170(opCode)
  *
  * @this {CPUStatePDP11}
  * @param {number} opCode
  */
-PDP11.op0Bnn_1170 = function(opCode)
+PDP11.op0BXn_1170 = function(opCode)
 {
     PDP11.aOps0BXn_1170[(opCode >> 6) & 0x3].call(this, opCode);
 };
 
 /**
- * op0Cnn_1170(opCode)
+ * op0CXn_1170(opCode)
  *
  * @this {CPUStatePDP11}
  * @param {number} opCode
  */
-PDP11.op0Cnn_1170 = function(opCode)
+PDP11.op0CXn_1170 = function(opCode)
 {
     PDP11.aOps0CXn_1170[(opCode >> 6) & 0x3].call(this, opCode);
 };
 
 /**
- * op0Dnn_1170(opCode)
+ * op0DXn_1170(opCode)
  *
  * @this {CPUStatePDP11}
  * @param {number} opCode
  */
-PDP11.op0Dnn_1170 = function(opCode)
+PDP11.op0DXn_1170 = function(opCode)
 {
     PDP11.aOps0DXn_1170[(opCode >> 6) & 0x3].call(this, opCode);
 };
@@ -1848,14 +1849,42 @@ PDP11.aOps0Xnn_1170 = [
     PDP11.opBLE,                // 0x07nn
     PDP11.opJSR,                // 0x08nn
     PDP11.opJSR,                // 0x09nn
-    PDP11.op0Ann_1170,          // 0x0Ann
-    PDP11.op0Bnn_1170,          // 0x0Bnn
-    PDP11.op0Cnn_1170,          // 0x0Cnn
-    PDP11.op0Dnn_1170,          // 0x0Dnn
+    PDP11.op0AXn_1170,          // 0x0Ann
+    PDP11.op0BXn_1170,          // 0x0Bnn
+    PDP11.op0CXn_1170,          // 0x0Cnn
+    PDP11.op0DXn_1170,          // 0x0Dnn
     PDP11.opUndefined,          // 0x0Enn
     PDP11.opUndefined           // 0x0Fnn
 ];
 
+PDP11.aOps0AXn_1170 = [
+    PDP11.opCLR,                // 0x0A0n
+    PDP11.opCOM,                // 0x0A4n
+    PDP11.opINC,                // 0x0A8n
+    PDP11.opDEC                 // 0x0ACn
+];
+
+PDP11.aOps0BXn_1170 = [
+    PDP11.opNEG,                // 0x0B0n
+    PDP11.opADC,                // 0x0B4n
+    PDP11.opSBC,                // 0x0B8n
+    PDP11.opTST                 // 0x0BCn
+];
+
+PDP11.aOps0CXn_1170 = [
+    PDP11.opROR,                // 0x0C0n
+    PDP11.opROL,                // 0x0C4n
+    PDP11.opASR,                // 0x0C8n
+    PDP11.opASL                 // 0x0CCn
+];
+
+PDP11.aOps0DXn_1170 = [
+    PDP11.opMARK,               // 0x0D0n
+    PDP11.opMFPI,               // 0x0D4n
+    PDP11.opMTPI,               // 0x0D8n
+    PDP11.opSXT                 // 0x0DCn
+];
+
 PDP11.aOps00Xn_1170 = [
     PDP11.op000X_1170,          // 0x000n
     PDP11.opUndefined,          // 0x001n
@@ -1914,13 +1943,13 @@ PDP11.aOps00BX_1170 = [
 ];
 
 PDP11.aOps000X_1170 = [
-    PDP11.opHALT,               // 0x0000
-    PDP11.opWAIT,               // 0x0001
-    PDP11.opRTI,                // 0x0002
-    PDP11.opBPT,                // 0x0003
-    PDP11.opIOT,                // 0x0004
-    PDP11.opRESET,              // 0x0005
-    PDP11.opRTT,                // 0x0006
+    PDP11.opHALT,               // 0x0000   000000
+    PDP11.opWAIT,               // 0x0001   000001
+    PDP11.opRTI,                // 0x0002   000002
+    PDP11.opBPT,                // 0x0003   000003
+    PDP11.opIOT,                // 0x0004   000004
+    PDP11.opRESET,              // 0x0005   000005
+    PDP11.opRTT,                // 0x0006   000006
     PDP11.opUndefined,          // 0x0007
     PDP11.opUndefined,          // 0x0008
     PDP11.opUndefined,          // 0x0009
@@ -1970,34 +1999,6 @@ PDP11.aOps8Xnn_1170 = [
     PDP11.opUndefined           // 0x8Fnn
 ];
 
-PDP11.aOps0AXn_1170 = [
-    PDP11.opCLR,                // 0x0A0n
-    PDP11.opCOM,                // 0x0A4n
-    PDP11.opINC,                // 0x0A8n
-    PDP11.opDEC                 // 0x0ACn
-];
-
-PDP11.aOps0BXn_1170 = [
-    PDP11.opNEG,                // 0x0B0n
-    PDP11.opADC,                // 0x0B4n
-    PDP11.opSBC,                // 0x0B8n
-    PDP11.opTST                 // 0x0BCn
-];
-
-PDP11.aOps0CXn_1170 = [
-    PDP11.opROR,                // 0x0C0n
-    PDP11.opROL,                // 0x0C4n
-    PDP11.opASR,                // 0x0C8n
-    PDP11.opASL                 // 0x0CCn
-];
-
-PDP11.aOps0DXn_1170 = [
-    PDP11.opMARK,               // 0x0D0n
-    PDP11.opMFPI,               // 0x0D4n
-    PDP11.opMTPI,               // 0x0D8n
-    PDP11.opSXT                 // 0x0DCn
-];
-
 PDP11.aOps8AXn_1170 = [
     PDP11.opCLRB,               // 0x8A0n
     PDP11.opCOMB,               // 0x8A4n
diff --git a/modules/pdp11/lib/cpustate.js b/modules/pdp11/lib/cpustate.js
index b12b39080..13b7741f6 100644
--- a/modules/pdp11/lib/cpustate.js
+++ b/modules/pdp11/lib/cpustate.js
@@ -165,7 +165,6 @@ CPUStatePDP11.prototype.initRegs = function()
     this.controlReg = [         // various control registers we don't really care about
         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
     ];
-    this.regOp = -1;            // current opcode
     this.opFlags = 0;
     this.cpuType = 70;
     this.trapPSW = -1;
@@ -504,6 +503,19 @@ CPUStatePDP11.prototype.getPC = function()
     return this.regsGen[7];
 };
 
+/**
+ * getPCWord()
+ *
+ * @this {CPUStatePDP11}
+ * @return {number}
+ */
+CPUStatePDP11.prototype.getPCWord = function()
+{
+    var data = this.readWordFromVirtual(this.regsGen[7]);
+    this.regsGen[7] = (this.regsGen[7] + 2) & 0xffff;
+    return data;
+};
+
 /**
  * setPC()
  *
@@ -728,28 +740,10 @@ CPUStatePDP11.prototype.setPSW = function(newPSW)
     this.regPSW = newPSW;
 };
 
-/**
- * updateNZCFlags(result, overflow)
- *
- * NOTE: The V flag is simply zeroed, it is not "updated" based on the result;
- * however, a specific overflow value may be provided (used by NEG, for example).
- *
- * @this {CPUStatePDP11}
- * @param {number} result
- * @param {number} [overflow]
- */
-CPUStatePDP11.prototype.updateNZCFlags = function(result, overflow)
-{
-    if (!(this.opFlags & PDP11.OPFLAG.SKIP_FLAGS)) {
-        this.flagN = this.flagZ = this.flagC = result;
-        this.flagV = overflow || 0;
-    }
-};
-
 /**
  * updateNZFlags(result)
  *
- * NOTE: The V flag is simply zeroed, it is not "updated" based on the result.
+ * NOTE: The V flag is simply zeroed, and the C flag is unchanged.
  *
  * @this {CPUStatePDP11}
  * @param {number} result
@@ -762,6 +756,23 @@ CPUStatePDP11.prototype.updateNZFlags = function(result)
     }
 };
 
+/**
+ * updateAllFlags(result, overflow)
+ *
+ * NOTE: The V flag is simply zeroed, unless a specific value is provided (eg, by NEG).
+ *
+ * @this {CPUStatePDP11}
+ * @param {number} result
+ * @param {number} [overflow]
+ */
+CPUStatePDP11.prototype.updateAllFlags = function(result, overflow)
+{
+    if (!(this.opFlags & PDP11.OPFLAG.SKIP_FLAGS)) {
+        this.flagN = this.flagZ = this.flagC = result;
+        this.flagV = overflow || 0;
+    }
+};
+
 /**
  * updateAddFlags(result, src, dst)
  *
@@ -815,12 +826,26 @@ CPUStatePDP11.prototype.updateIncFlags = function(result, dst)
 };
 
 /**
- * updateLogFlags(result)
+ * updateMulFlags(result)
  *
  * @this {CPUStatePDP11}
  * @param {number} result
  */
-CPUStatePDP11.prototype.updateLogFlags = function(result)
+CPUStatePDP11.prototype.updateMulFlags = function(result)
+{
+    this.flagN = result >> 16;
+    this.flagZ = this.flagN | result;
+    this.flagV = 0;
+    this.flagC = (result < -32768 || result > 32767)? 0x10000 : 0;
+};
+
+/**
+ * updateShiftFlags(result)
+ *
+ * @this {CPUStatePDP11}
+ * @param {number} result
+ */
+CPUStatePDP11.prototype.updateShiftFlags = function(result)
 {
     if (!(this.opFlags & PDP11.OPFLAG.SKIP_FLAGS)) {
         this.flagN = this.flagZ = this.flagC = result;
@@ -913,7 +938,7 @@ CPUStatePDP11.prototype.trap = function(vector, reason)
 
     if (DEBUG && this.dbg) {
         if (this.messageEnabled(MessagesPDP11.TRAP)) {
-            this.printMessage("trap to vector " + this.dbg.toBase(vector, 0, true) + (reason? " (reason " + reason + ")" : ""), MessagesPDP11.TRAP, true);
+            this.printMessage("trap to vector " + this.dbg.toStrBase(vector, 0, true) + (reason? " (reason " + reason + ")" : ""), MessagesPDP11.TRAP, true);
         }
     }
 
@@ -1319,9 +1344,7 @@ CPUStatePDP11.prototype.getVirtualByMode = function(addressMode, accessFlags)
         stepSize = 2;
         virtualAddress = this.regsGen[reg];
         if (reg !== 7) virtualAddress |= addrDSpace;
-        if ((virtualAddress = this.readWordFromVirtual(virtualAddress)) < 0) {
-            return virtualAddress;
-        }
+        virtualAddress = this.readWordFromVirtual(virtualAddress);
         // if (reg === 7) LOG_ADDRESS(virtualAddress); // @#n not operational
         virtualAddress |= addrDSpace;
         break;
@@ -1345,44 +1368,25 @@ CPUStatePDP11.prototype.getVirtualByMode = function(addressMode, accessFlags)
         stepSize = -2;
         virtualAddress = (this.regsGen[reg] - 2) & 0xffff;
         if (reg !== 7) virtualAddress |= addrDSpace;
-        if ((virtualAddress = this.readWordFromVirtual(virtualAddress)) < 0) {
-            return virtualAddress;
-        }
-        virtualAddress |= addrDSpace;
+        virtualAddress = this.readWordFromVirtual(virtualAddress) | addrDSpace;
         break;
 
     /*
      * Mode 6: d(R)
      */
     case 6:
-        if ((virtualAddress = this.readWordFromVirtual(this.regsGen[7])) < 0) {
-            return virtualAddress;
-        }
-        this.regsGen[7] = (this.regsGen[7] + 2) & 0xffff;
-        if (reg < 7) {
-            virtualAddress = (virtualAddress + this.regsGen[reg]) & 0xffff;
-        } else {
-            virtualAddress = (virtualAddress + this.regsGen[reg]) & 0xffff;
-        }
-        return virtualAddress | addrDSpace;
+        virtualAddress = this.getPCWord();
+        virtualAddress = ((virtualAddress + this.regsGen[reg]) & 0xffff) | addrDSpace;
+        return virtualAddress;
 
     /*
      * Mode 7: @d(R)
      */
     case 7:
-        if ((virtualAddress = this.readWordFromVirtual(this.regsGen[7])) < 0) {
-            return virtualAddress;
-        }
-        this.regsGen[7] = (this.regsGen[7] + 2) & 0xffff;
-        if (reg < 7) {
-            virtualAddress = (virtualAddress + this.regsGen[reg]) & 0xffff;
-        } else {
-            virtualAddress = (virtualAddress + this.regsGen[reg]) & 0xffff;
-        }
-        if ((virtualAddress = this.readWordFromVirtual(virtualAddress | PDP11.ACCESS.DSPACE)) < 0) {
-            return virtualAddress;
-        }
-        return virtualAddress | addrDSpace;
+        virtualAddress = this.getPCWord();
+        virtualAddress = (virtualAddress + this.regsGen[reg]) & 0xffff;
+        virtualAddress = this.readWordFromVirtual(virtualAddress | PDP11.ACCESS.DSPACE) | addrDSpace;
+        return virtualAddress;
     }
 
     this.regsGen[reg] = (this.regsGen[reg] + stepSize) & 0xffff;
@@ -1727,7 +1731,7 @@ CPUStatePDP11.prototype.stepCPU = function(nMinCycles)
             this.checkInterruptQueue();
         }
 
-        if (!(this.regMMR0 & 0xe000)) {
+        if (!(this.regMMR0 & PDP11.MMR0.ABORT)) {
             this.regMMR1 = 0;
             this.regMMR2 = this.regsGen[7];
         }
@@ -1738,22 +1742,7 @@ CPUStatePDP11.prototype.stepCPU = function(nMinCycles)
          */
         this.opFlags = this.regPSW & PDP11.PSW.TF;
 
-        /*
-         * TODO: Determine (later) if this.regOp is a useful (internal) register to maintain;
-         * perhaps it would alleviate lots of opCode parameter-passing.  In the meantime, we use
-         * it to detect if our new decode() function has processed (ie, "consumed") the opcode,
-         * by setting it to -1.  If it has, then we can skip the older opcode decode logic below.
-         */
-        var opCode = this.regOp = this.readWordFromVirtual(this.regsGen[7]);
-        if (opCode >= 0) this.regsGen[7] = (this.regsGen[7] + 2) & 0xffff;
-
-        this.decode(opCode);
-
-        if (DEBUG && this.regOp < 0) {
-            this.regsGen[7] = (this.regsGen[7] - 2) & 0xffff;
-            this.println("unimplemented");
-            break;
-        }
+        this.decode(this.getPCWord());
 
     } while (this.nStepCycles > 0);
 
diff --git a/modules/pdp11/lib/debugger.js b/modules/pdp11/lib/debugger.js
index 6cebfb333..5b40d1137 100644
--- a/modules/pdp11/lib/debugger.js
+++ b/modules/pdp11/lib/debugger.js
@@ -777,7 +777,7 @@ if (DEBUGGER) {
      */
     DebuggerPDP11.prototype.toStrOffset = function(off)
     {
-        return this.toBase(off);
+        return this.toStrBase(off);
     };
 
     /**
@@ -1036,9 +1036,82 @@ if (DEBUGGER) {
         return false;
     };
 
+    /**
+     * getRegIndex(sReg, off)
+     *
+     * @this {DebuggerPDP11}
+     * @param {string} sReg
+     * @param {number} [off] optional offset into sReg
+     * @return {number} register index, or -1 if not found
+     */
+    DebuggerPDP11.prototype.getRegIndex = function(sReg, off)
+    {
+        var iReg = -1;
+        sReg = sReg.toUpperCase();
+        switch(sReg) {
+        case "SP":
+            iReg = 6;
+            break;
+        case "PC":
+            iReg = 7;
+            break;
+        default:
+            if (sReg.charAt(0) == "R") {
+                iReg = +sReg.charAt(1);
+                if (iReg < 0 || iReg > 7) iReg = -1;
+            }
+            break;
+        }
+        return iReg;
+    };
+
+    /**
+     * getRegName(iReg)
+     *
+     * @this {DebuggerPDP11}
+     * @param {number} iReg
+     * @return {string}
+     */
+    DebuggerPDP11.prototype.getRegName = function(iReg)
+    {
+        return (iReg < 6? ("R" + iReg) :  (iReg == 6? "SP" : "PC"));
+    };
+
+    /**
+     * getRegValue(iReg)
+     *
+     * Register numbers 0-7 are reserved for cpu.regsGen, 8-15 are reserved for cpu.regsAlt,
+     * 16-19 for cpu.regsAltStack, and 20 for regPSW.
+     *
+     * @this {DebuggerPDP11}
+     * @param {number} iReg
+     * @return {number|undefined}
+     */
+    DebuggerPDP11.prototype.getRegValue = function(iReg)
+    {
+        var value;
+        if (iReg >= 0) {
+            if (iReg < 8) {
+                value = this.cpu.regsGen[iReg];
+            }
+            else if (iReg < 16) {
+                value = this.cpu.regsAlt[iReg-8];
+            }
+            else if (iReg < 20) {
+                value = this.cpu.regsAltStack[iReg-16];
+            }
+            else if (iReg == DebuggerPDP11.REG_PSW) {
+                value = this.cpu.getPSW();
+            }
+        }
+        return value;
+    };
+
     /**
      * replaceRegs(s)
      *
+     * TODO: Implement or eliminate.
+     *
      * @this {DebuggerPDP11}
      * @param {string} s
      * @return {string}
@@ -1929,7 +2002,7 @@ if (DEBUGGER) {
         var sLine = this.toStrAddr(dbgAddrOp) + ":";
         if (dbgAddrOp.addr !== PDP11.ADDR_INVALID && dbgAddr.addr !== PDP11.ADDR_INVALID) {
             do {
-                sOpcodes += ' ' + this.toBase(this.getWord(dbgAddrOp, 2));
+                sOpcodes += ' ' + this.toStrBase(this.getWord(dbgAddrOp, 2));
                 if (dbgAddrOp.addr == null) break;
             } while (dbgAddrOp.addr != dbgAddr.addr);
         }
@@ -1973,20 +2046,20 @@ if (DEBUGGER) {
         if (opTypeOther == DebuggerPDP11.OP_BRANCH) {
             disp = ((opCode & 0xff) << 24) >> 23;
             addr = (dbgAddr.addr + disp) & 0xffff;
-            sOperand = this.toBase(addr);
+            sOperand = this.toStrBase(addr);
         }
         else if (opTypeOther == DebuggerPDP11.OP_DSTOFF) {
             disp = (opCode & 0x3f) << 1;
             addr = (dbgAddr.addr - disp) & 0xffff;
-            sOperand = this.toBase(addr);
+            sOperand = this.toStrBase(addr);
         }
         else if (opTypeOther == DebuggerPDP11.OP_DSTNUM3) {
             disp = (opCode & 0x7);
-            sOperand = this.toBase(disp, 1);
+            sOperand = this.toStrBase(disp, 1);
         }
         else if (opTypeOther == DebuggerPDP11.OP_DSTNUM6) {
             disp = (opCode & 0x3f);
-            sOperand = this.toBase(disp, 1);
+            sOperand = this.toStrBase(disp, 1);
         }
         else {
             /*
@@ -2022,7 +2095,7 @@ if (DEBUGGER) {
                          * When using R7 (aka PC), POST-INCREMENT is known as IMMEDIATE
                          */
                         wIndex = this.getWord(dbgAddr, 2);
-                        sOperand = '#' + this.toBase(wIndex, 0, true);
+                        sOperand = '#' + this.toStrBase(wIndex, 0, true);
                     }
                     break;
                 case PDP11.OPMODE.POSTINCD:             // 0x3: POST-INCREMENT DEFERRED
@@ -2033,7 +2106,7 @@ if (DEBUGGER) {
                          * When using R7 (aka PC), POST-INCREMENT DEFERRED is known as ABSOLUTE
                          */
                         wIndex = this.getWord(dbgAddr, 2);
-                        sOperand = "@#" + this.toBase(wIndex, 0, true);
+                        sOperand = "@#" + this.toStrBase(wIndex, 0, true);
                     }
                     break;
                 case PDP11.OPMODE.PREDEC:               // 0x4: PRE-DECREMENT
@@ -2044,22 +2117,22 @@ if (DEBUGGER) {
                     break;
                 case PDP11.OPMODE.INDEX:                // 0x6: INDEX
                     wIndex = this.getWord(dbgAddr, 2);
-                    sOperand = this.toBase(wIndex, 0, true) + '(' + this.getRegName(reg) + ')';
+                    sOperand = this.toStrBase(wIndex, 0, true) + '(' + this.getRegName(reg) + ')';
                     if (reg == 7) {
                         /*
                          * When using R7 (aka PC), INDEX is known as RELATIVE
                          */
-                        sOperand = [sOperand, this.toBase((wIndex + dbgAddr.addr) & 0xffff)];
+                        sOperand = [sOperand, this.toStrBase((wIndex + dbgAddr.addr) & 0xffff)];
                     }
                     break;
                 case PDP11.OPMODE.INDEXD:               // 0x7: INDEX DEFERRED
                     wIndex = this.getWord(dbgAddr, 2);
-                    sOperand = '@' + this.toBase(wIndex) + '(' + this.getRegName(reg) + ')';
+                    sOperand = '@' + this.toStrBase(wIndex) + '(' + this.getRegName(reg) + ')';
                     if (reg == 7) {
                         /*
                          * When using R7 (aka PC), INDEX DEFERRED is known as RELATIVE DEFERRED
                          */
-                        sOperand = [sOperand, this.toBase((wIndex + dbgAddr.addr) & 0xffff)];
+                        sOperand = [sOperand, this.toStrBase((wIndex + dbgAddr.addr) & 0xffff)];
                     }
                     break;
                 default:
@@ -2122,18 +2195,6 @@ if (DEBUGGER) {
         return sFlag.charAt(0) + (b? '1' : '0') + ' ';
     };
 
-    /**
-     * getRegName(iReg)
-     *
-     * @this {DebuggerPDP11}
-     * @param {number} iReg
-     * @return {string}
-     */
-    DebuggerPDP11.prototype.getRegName = function(iReg)
-    {
-        return (iReg < 6? ("R" + iReg) :  (iReg == 6? "SP" : "PC"));
-    };
-
     /**
      * getRegOutput(iReg)
      *
@@ -2148,16 +2209,16 @@ if (DEBUGGER) {
 
         if (iReg < 8) {
             sReg = this.getRegName(iReg);
-            sReg += '=' + this.toBase(cpu.regsGen[iReg]);
+            sReg += '=' + this.toStrBase(cpu.regsGen[iReg]);
         }
         else if (iReg < 13) {
-            sReg = "A" + (iReg - 8) + '=' + this.toBase(cpu.regsAlt[iReg - 8]);
+            sReg = "A" + (iReg - 8) + '=' + this.toStrBase(cpu.regsAlt[iReg - 8]);
         }
         else if (iReg >= 16 && iReg < 20) {
-            sReg = "S" + (iReg - 16) + '=' + this.toBase(cpu.regsAltStack[iReg - 16]);
+            sReg = "S" + (iReg - 16) + '=' + this.toStrBase(cpu.regsAltStack[iReg - 16]);
         }
         else if (iReg == DebuggerPDP11.REG_PSW) {
-            sReg = "PS=" + this.toBase(cpu.getPSW());
+            sReg = "PS=" + this.toStrBase(cpu.getPSW());
         }
         if (sReg) sReg += ' ';
         return sReg;
@@ -2762,29 +2823,32 @@ if (DEBUGGER) {
      */
     DebuggerPDP11.prototype.doEdit = function(asArgs)
     {
-        var size = 1;
-        var mask = 0xff;
-        var fnGet = this.getByte;
-        var fnSet = this.setByte;
-        if (asArgs[0] == "ew") {
+        var size, mask;
+        var fnGet, fnSet;
+        var sCmd = asArgs[0];
+        var sAddr = asArgs[1];
+        if (sCmd == "eb") {
+            size = 1;
+            mask = 0xff;
+            fnGet = this.getByte;
+            fnSet = this.setByte;
+        }
+        else if (sCmd == "e" || sCmd == "ew") {
             size = 2;
             mask = 0xffff;
             fnGet = this.getWord;
             fnSet = this.setWord;
+        } else {
+            sAddr = null;
         }
-        var cch = size << 1;
-
-        var sAddr = asArgs[1];
         if (sAddr == null) {
             this.println("edit memory commands:");
             this.println("\teb [a] [...]  edit bytes at address a");
             this.println("\tew [a] [...]  edit words at address a");
             return;
         }
-
         var dbgAddr = this.parseAddr(sAddr);
         if (!dbgAddr) return;
-
         for (var i = 2; i < asArgs.length; i++) {
             var vNew = this.parseExpression(asArgs[i]);
             if (vNew === undefined) {
@@ -2795,7 +2859,7 @@ if (DEBUGGER) {
                 this.println("warning: " + str.toHex(vNew) + " exceeds " + size + "-byte value");
             }
             var vOld = fnGet.call(this, dbgAddr);
-            this.println("changing " + this.toStrAddr(dbgAddr) + " from " + str.toHex(vOld, cch, true) + " to " + str.toHex(vNew, cch, true));
+            this.println("changing " + this.toStrAddr(dbgAddr) + " from " + this.toStrBase(vOld, size) + " to " + this.toStrBase(vNew, size));
             fnSet.call(this, dbgAddr, vNew, size);
         }
     };
diff --git a/modules/pdp11/lib/defines.js b/modules/pdp11/lib/defines.js
index a13bae924..ca89ca149 100644
--- a/modules/pdp11/lib/defines.js
+++ b/modules/pdp11/lib/defines.js
@@ -281,7 +281,8 @@ var PDP11 = {
         TRAP_MMU:   0x1000,     // trap: MMU
         ABORT_RO:   0x2000,     // abort: read-only
         ABORT_PL:   0x4000,     // abort: page length
-        ABORT_NR:   0x8000      // abort: non-resident
+        ABORT_NR:   0x8000,     // abort: non-resident
+        ABORT:      0xE000
     },
     MMR1: {                     // general purpose auto-inc/auto-dec register
         REG1_NUM:   0x0007,
diff --git a/modules/shared/lib/debugger.js b/modules/shared/lib/debugger.js
index 094720332..e0cc05309 100644
--- a/modules/shared/lib/debugger.js
+++ b/modules/shared/lib/debugger.js
@@ -659,7 +659,7 @@ if (DEBUGGER) {
     };
 
     /**
-     * toBase(n, nBytes, fStripLeadingZeros)
+     * toStrBase(n, nBytes, fStripLeadingZeros)
      *
      * Use this instead of str.toHex() or str.toOct() to convert bytes/words to the Debugger's default base.
      *
@@ -669,7 +669,7 @@ if (DEBUGGER) {
      * @param {boolean} [fStripLeadingZeros]
      * @return {string}
      */
-    Debugger.prototype.toBase = function(n, nBytes, fStripLeadingZeros)
+    Debugger.prototype.toStrBase = function(n, nBytes, fStripLeadingZeros)
     {
         var s;
         switch(this.nBase) {
diff --git a/versions/c1pjs/1.30.0/c1p-dbg.js b/versions/c1pjs/1.30.0/c1p-dbg.js
index ddc44bc56..a5cd2c61b 100644
--- a/versions/c1pjs/1.30.0/c1p-dbg.js
+++ b/versions/c1pjs/1.30.0/c1p-dbg.js
@@ -4,16 +4,16 @@ function t(a,b){var c=0,d=null;if("object"==typeof resources&&(d=resources[a]))b
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+function z(a,b,c,d){this.type=a;b||(b={id:"",name:""});this.id=b.id||"";this.name=b.name;b=this.id.indexOf(".");0>b?this.bb=this.id:(this.pb=this.id.substr(0,b),this.bb=this.id.substr(b+1));this[a]=c;this.C={ready:!1,Ja:!1,eb:!1,M:!1,error:!1};this.ab=null;this.C.error=!1;this.H={};this.u=null;this.la=d||0;A.push(this)}var na=void 0,oa={};
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+function xa(a){z.call(this,"C1PCPU",a);ya(this);this.C.M=!1;this.C.na=!1;this.Sa=a.autoStart;this.Qa=0;this.Lb=1;this.cb=2;this.speed=this.Qa;this.Ha=30;this.Ga=5;this.La=8;this.Ra=["Slow","Fast","Max"];this.ib=["(1Mhz)","(up to "+this.La+"Mhz)","(unlimited)"];this.P=[];this.K=[];this.oa=65536;this.pa=0;this.da=65536;this.ea=0;this.Pa=32;this.$a=2;this.Kb=1;this.o=[this.uc,this.Od,this.Fe,this.m,this.m,this.Qd,this.kc,this.m,this.Td,this.Nd,this.jc,this.m,this.m,this.Kd,this.hc,this.m,this.tc,this.Pd,
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@@ -21,11 +21,11 @@ this.m,this.m,this.m,this.Cc,this.Qc,this.m,this.Kc,this.Db,this.m,this.m,this.L
 5,0,4,2,2,0,5,4,6,0,2,5,0,0,0,4,6,0,2,4,0,0,0,4,7,0,0,6,0,0,3,3,3,0,2,0,2,0,4,4,4,0,2,5,0,0,4,4,4,0,2,4,2,0,0,4,0,0,2,6,2,0,3,3,3,0,2,2,2,0,4,4,4,0,2,5,0,0,4,4,4,0,2,4,2,0,4,4,4,0,2,6,0,0,3,3,5,0,2,2,2,0,4,4,6,0,2,5,0,0,0,4,6,0,2,4,0,0,0,4,7,0,2,6,0,0,3,3,5,0,2,2,2,0,4,4,6,0,2,5,0,0,0,4,6,0,2,4,0,0,0,4,7,0]}B(xa);f=xa.prototype;
 f.reset=function(a){this.C.na&&this.aa();ya(this);this.f=this.a[65532]|this.a[65533]<<8;this.C.error=!1;this.u?this.u.reset():a&&(!0===this.Sa||null===this.Sa&&!this.u&&void 0===this.H.run)&&this.va()};
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+f.ba=function(a,b,c){this.a=a;this.N=b;this.qa=c-b+1;this.Ea=this.N+this.qa;this.N?u("unsupported CPU address buffer offset ("+this.N+")"):this.X()};f.ia=function(a,b){if(a&&!this.C.M){this.J=b;(this.u=L(b,"debugger"))&&this.u.Qb();if(a=L(b,"video"))this.hb=function(a){return function(){za(a)}}(a),this.ca=function(a){return function(){a.ca()}}(a);this.C.M=!0;this.reset(!0);this.update()}};function Aa(a,b,c,d,e){0>Ba(a.P,b,c,d,e)&&(a.oa>b&&(a.oa=b),a.pa<c&&(a.pa=c),a.P.push([b,c,d,e]))}
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 function M(a,b,c){void 0!==b&&(a.speed=b,a.H.setSpeed&&(a.H.setSpeed.innerHTML=a.Ra[2<=b?0:b+1]),a.l("running at "+a.Ra[b].toLowerCase()+" speed "+a.ib[b]),c&&a.ca());a.U=0;a.Na=ea();Ea(a)}f.hb=function(){};f.ca=function(){};function O(a,b,c,d){void 0!==a.H[b]&&(void 0===d&&(d=1),c="0000"+c.toString(16),a.H[b].innerHTML=c.slice(c.length-d).toUpperCase())}
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-function Ea(a,b){var c=30;c<a.Ia&&(c=a.Ia);c<a.Ha&&(c=a.Ha);var d=1;b&&a.speed>a.Qa&&a.ta&&(d=a.ta);d>a.La&&2>a.speed&&(d=a.La);a.jb=Math.round(1E3/30);a.ja=Math.floor(1E6/c*d);a.ra=Math.floor(1E6/30*d);a.Wa=Math.floor(1E6/a.Ia*d);a.Va=Math.floor(1E6/a.Ha*d);b||(a.R=a.ra,a.Z=a.Wa,a.V=a.Va);a.Aa=0}
+function Ea(a,b){var c=30;c<a.Ha&&(c=a.Ha);c<a.Ga&&(c=a.Ga);var d=1;b&&a.speed>a.Qa&&a.ta&&(d=a.ta);d>a.La&&2>a.speed&&(d=a.La);a.jb=Math.round(1E3/30);a.ja=Math.floor(1E6/c*d);a.ra=Math.floor(1E6/30*d);a.Wa=Math.floor(1E6/a.Ha*d);a.Va=Math.floor(1E6/a.Ga*d);b||(a.R=a.ra,a.Z=a.Wa,a.V=a.Va);a.Aa=0}
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@@ -81,11 +81,11 @@ R.prototype.ba=function(a,b,c,d){this.a=a;this.v=b;a=c-b+1;this.g||(this.g=a);a!
 function Na(a,b,c,d){if(d)a.l('Error loading ROM "'+b+'" ('+d+")");else{if("["==c.charAt(0)||"{"==c.charAt(0))try{var e=eval("("+c+")"),g=e.bytes;g?a.b=g:a.b=e}catch(h){a.l('Error processing ROM "'+b+'": '+h.message);return}else for(b=c.replace(/\n/gm," ").replace(/ +$/,"").split(" "),a.b=Array(b.length),c=0;c<b.length;c++)a.b[c]=parseInt(b[c],16);Oa(a)}}
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-function Qa(a){z.call(this,"C1PKeyboard",a);this.C.M=!1;this.Ha=a.model;this.da=8;this.fb=10;this.Wa=13;this.ea=27;this.Na=this.da;this.Va=this.fb;this.Ia=this.Wa;this.$=this.ea;this.L=241;this.Z=224;this.Ra=3;this.Sa=15;this.K=1;this.D={};this.D["break"]=this.Z;this.D.esc=this.$;this.D["ctrl-c"]=this.Ra;this.D["ctrl-o"]=this.Sa;this.b=[];this.b[49]=30464;this.b[33]=30704;this.b[50]=30208;this.b[34]=30448;this.b[51]=29952;this.b[35]=30192;this.b[52]=29696;this.b[36]=29936;this.b[53]=29440;this.b[37]=
-29680;this.b[54]=29184;this.b[38]=29424;this.b[55]=28928;this.b[39]=29168;this.b[56]=26368;this.b[40]=26608;this.b[57]=26112;this.b[41]=26352;this.b[48]=25856;this.b[58]=25600;this.b[42]=25840;this.b[45]=25344;this.b[61]=25584;this.b[46]=22272;this.b[62]=22512;this.b[108]=22016;this.b[76]=22256;this.b[92]=22256;this.b[111]=21760;this.b[79]=22E3;this.b[this.Na]=22E3;this.b[this.Va]=21504;this.b[this.Ia]=21248;this.b[119]=18176;this.b[87]=18416;this.b[101]=17920;this.b[69]=18160;this.b[114]=17664;this.b[82]=
+function Qa(a){z.call(this,"C1PKeyboard",a);this.C.M=!1;this.Ga=a.model;this.da=8;this.fb=10;this.Wa=13;this.ea=27;this.Na=this.da;this.Va=this.fb;this.Ha=this.Wa;this.$=this.ea;this.L=241;this.Z=224;this.Ra=3;this.Sa=15;this.K=1;this.D={};this.D["break"]=this.Z;this.D.esc=this.$;this.D["ctrl-c"]=this.Ra;this.D["ctrl-o"]=this.Sa;this.b=[];this.b[49]=30464;this.b[33]=30704;this.b[50]=30208;this.b[34]=30448;this.b[51]=29952;this.b[35]=30192;this.b[52]=29696;this.b[36]=29936;this.b[53]=29440;this.b[37]=
+29680;this.b[54]=29184;this.b[38]=29424;this.b[55]=28928;this.b[39]=29168;this.b[56]=26368;this.b[40]=26608;this.b[57]=26112;this.b[41]=26352;this.b[48]=25856;this.b[58]=25600;this.b[42]=25840;this.b[45]=25344;this.b[61]=25584;this.b[46]=22272;this.b[62]=22512;this.b[108]=22016;this.b[76]=22256;this.b[92]=22256;this.b[111]=21760;this.b[79]=22E3;this.b[this.Na]=22E3;this.b[this.Va]=21504;this.b[this.Ha]=21248;this.b[119]=18176;this.b[87]=18416;this.b[101]=17920;this.b[69]=18160;this.b[114]=17664;this.b[82]=
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-f=Qa.prototype;f.reset=function(){this.Ma(this.Ha);this.g=this.K;this.oa=0;this.o=[this.K,0,0,0,0,0,0,0];this.P=[];if(this.v)for(var a in this.v)isNaN(+a)||this.v[a]&&clearTimeout(this.v[a]);this.v=[];this.Aa=this.A=0;this.pa=-1;this.ja=this.o;this.qa=this.V=0;this.B=""};
+f=Qa.prototype;f.reset=function(){this.Ma(this.Ga);this.g=this.K;this.oa=0;this.o=[this.K,0,0,0,0,0,0,0];this.P=[];if(this.v)for(var a in this.v)isNaN(+a)||this.v[a]&&clearTimeout(this.v[a]);this.v=[];this.Aa=this.A=0;this.pa=-1;this.ja=this.o;this.qa=this.V=0;this.B=""};
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@@ -108,50 +108,50 @@ f.T=function(a,b,c){var d=this;switch(b){case "listSerial":return this.H[b]=c,!0
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 function ab(a,b,c,d){if(c){a.A=0;a.g=c;a.B=!0;a.o=0;if(-1!==b.indexOf(".json",b.length-5))try{d="";var e=eval("("+c+")").bytes;for(c=0;c<e.length;c++)d+=String.fromCharCode(e[c]);a.g=d;a.B=!1}catch(g){a.l('Error processing file "'+b+'": '+g.message);return}a.J&&a.b&&a.s.C.na?(a.l("auto-loading "+b),a.s.ca(),"."!=a.g.charAt(0)?(a.o=1,U(a.b,"NEW\nLOAD\n")):(a.o=2,a.J.reset(!0),U(a.b,"ML"))):a.l(b+" ready to load")}else a.l('Error loading file "'+b+'" ('+d+")")}
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 break;case "h":a.aa();break;case "o":if(void 0===c[1]||"?"==c[1])a.l("\noption commands:"),a.l("max\trun at maximum speed"),a.l("fast\trun faster (up to "+a.s.La+"Mhz)"),a.l("slow\trun at normal speed (1Mhz)"),a.l("classic\tuse classic operand syntax"),a.l("modern\tuse modern operand syntax"),a.l("msg\tenable message categories");else switch(e=c[1],e){case "slow":M(a.s,a.s.Qa);break;case "fast":M(a.s,a.s.Lb);break;case "max":M(a.s,a.s.cb);break;case "classic":mb(a,!0);a.l("classic syntax enabled");
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-this.B.f,d.kb=this.B.kb;this.f("PDP11js v1.30.0\nCopyright \u00a9 2012-2016 Jeff Parsons <Jeff@pcjs.org>\nLicense: GPL version 3 or later <http://gnu.org/licenses/gpl.html>");this.f("Portions adapted from the PDP-11/70 Emulator v1.3 by Paul Nankervis <paulnank@hotmail.com>");for(b=0;b<f.length;b++)d=f[b],d.Ya&&d.Ya(this,this.F,this.b,this.C);b=null;d=a.resume;void 0!==d&&(1<d.length?b=this.J=d:this.i=parseInt(d,10));var e;if(a=Ac(this,"state")||(e=!0,a.state))b=this.$=a,e||(this.G=!0,this.i=Lf),this.i&&
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-l.Pb=function(a){void 0===a&&(a=this.i||(this.R?1:Lf));if(!this.A){this.A++;var b=!1,c=!1;this.ca=!1;var d=this.T||new M(this,"1.30.0");if(-1==a)b=!0;else if(a>Lf){if(Nf(d,this.R)){this.D=new M(this,"1.30.0","failsafe");Nf(this.D)&&(Sf(this,d),a=2,Tf(this.D));this.D.set("timestamp",qa());Uf(this.D);var f=this.i&&!this.G;if(1==a||ta("Click OK to restore the previous PDP11js machine state, or CANCEL to reset the machine.")){if(c=Rf(d)){var e=d.get("code"),g=d.get("data");e&&("ok"==e?Nf(d,g):("error"==
-e&&"no machine state"!=g?(this.qa("Error: "+g),"unable to verify user"==g&&(Aa("user",""),this.j=null)):this.f(e+": "+g),Tf(d),Nf(d)?(c=Rf(d),f=!0):c=!1))}f&&Qf(this,c?d:null)}else 2==a&&d.clear()}else Qf(this);delete this.R;delete this.T}f=$a(this.id);for(e=0;e<f.length;e++)g=f[e],g!==this&&g!=this.b&&(c=Vf(this,g,d,b,c));b=[d,a,c];-1!=a?Pf(this,this.yc,b):this.yc(b)}};
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+function Lf(a,b){if(!b){var c;if("object"==typeof resources&&(c=resources.parms))try{b=eval("("+c+")")}catch(d){u(d.message+" ("+c+")")}}a.ea=b}function Ac(a,b,c){var d=b.toLowerCase(),d=Ua[b]||Ua[d];void 0===d&&a.ea&&(d=a.ea[b]);void 0===d&&c&&(d=c[b]);void 0===d&&"object"==typeof resources&&resources[b]&&(d=b);return d}function Qf(a,b,c){for(var d=ab(a.id),f=0;f<=d.length;f++){var e=f<d.length?d[f]:a;if(!sb(e)){sb(e,function(){Qf(a,b,c)});return}}b.call(a,c)}
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diff --git a/versions/pdp11/1.30.0/pdp11.js b/versions/pdp11/1.30.0/pdp11.js
index dfab0e8d4..60fda61d8 100644
--- a/versions/pdp11/1.30.0/pdp11.js
+++ b/versions/pdp11/1.30.0/pdp11.js
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@@ -25,7 +25,7 @@ function Na(a,b){var c=this.controller;if(a=c.oa[a]){if(a[2])return a[2](b);if(a
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 function Ta(a,b){return a.b[(b&a.j)>>>a.f].cb(b&a.i,b)}function Ua(a,b,c){var d=b&a.i,f=(b&a.j)>>>a.f;d!=a.i?a.b[f].Fc(d,c&65535,b):(a.b[f++].Wa(d,c&255,b),a.b[f&a.L].Wa(0,c>>8&255,b+1))}function Va(a){for(var b=0,c=[],d=0;d<a.l;d++){var f=a.b[d];if(f.ra||f.cc){c[b++]=d;var e=b++;if(f=f.save()){for(var g=0,h=0,k=[];g<f.length;){for(var m=f[g],r=g+1;r<f.length&&f[r]===m;)r++;k[h++]=r-g;k[h++]=m;g=r}k.length<f.length&&(f=k)}c[e]=f}}return c}
 function Wa(a,b){var c=Xa,d;for(d in c)for(var f=c[d],e=a,g=+d,h=f[0]?f[0].bind(b):null,k=f[1]?f[1].bind(b):null,m=f[2]?f[2].bind(b):null,r=f[3]?f[3].bind(b):null,f=f[4],v=+d;v<=g;v+=2){var D=v&8191;void 0!==e.oa[D]?q("I/O address already registered: "+n(v,8,!0)):e.oa[D]=[h,k,m,r,!1,f||"unknown"]}}function Ya(a,b,c){a.C=b;a.ab=c}function Ra(a,b,c){q("Memory block error ("+a+": "+n(b)+","+n(c)+")");return!1}
-function H(a){w.call(this,"Device",a,H);this.b={Eb:[],U:0,W:128,b:127,bc:0};this.g={data:0,Hc:0,Ra:20,zc:0};this.f={o:0,Hb:-1};this.i={fb:2496,P:0,A:128,gb:0,eb:0,V:0,Sb:0,R:[],Ia:[406,406,406,406],F:[12,12,12,12]};this.j={o:129,$a:0,H:0,ua:0,pa:0,Aa:0,R:[],F:[40,40,40,40],Ia:[1024,1024,512,512],$b:[157,157,29,29]};this.l={a:[8210,8208,8210,8226],F:[22,22,22,50],Ha:[19,19,19,32],xb:[815,411,815,630],R:[],D:2176,Ua:0,Sa:0,da:[0,0,0,0,0,0,0,0],ca:0,S:[4544,4544,4544,4544,4544,4544,4544,4544],Ta:[0,
+function H(a){w.call(this,"Device",a,H);this.b={Eb:[],U:0,W:128,b:127,bc:0};this.g={data:0,Hc:0,Ra:20,zc:0};this.f={o:0,Hb:-1};this.i={fb:2496,P:0,A:128,gb:0,eb:0,V:0,Sb:0,R:[],Ia:[406,406,406,406],F:[12,12,12,12]};this.j={o:129,$a:0,H:0,ua:0,pa:0,Aa:0,R:[],F:[40,40,40,40],Ia:[1024,1024,512,512],$b:[157,157,29,29]};this.l={a:[8210,8208,8210,8226],F:[22,22,22,50],Ha:[19,19,19,32],xb:[815,411,815,630],R:[],D:2176,Ua:0,Sa:0,ca:[0,0,0,0,0,0,0,0],ba:0,S:[4544,4544,4544,4544,4544,4544,4544,4544],Ta:[0,
 0,0,0,0,0,0,0],Na:0,wc:[0,0,0,0,0,0,0,0],Tb:0,Ub:[0,0,0,0,0,0,0,0],f:[0,0,0,0,0,0,0,0],xc:[1,2,3,4,5,6,7,8],Vb:[0,0,0,0,0,0,0,0],ja:[0,0,0,0,0,0,0,0],ub:[0,0,0,0,0,0,0,0],uc:[0,0,0,0,0,0,0,0],vc:[0,0,0,0,0,0,0,0],sc:[0,0,0,0,0,0,0,0],tc:[0,0,0,0,0,0,0,0],za:0,Gb:0}}y(H);
 var Za=[4127,448,4191,450,4383,452,2591,454,21983,32768,65534,13791,16384,65534,770,2719,454,2591,65534,257,0,2566,33028,34051,33282,1281,33537,0,2758,32771,770,1025,1793,0,3078,33794,34305,513,0,5574,43690,4480,4097,4162,4227,4292,4357,57665,1281,769,0,3138,34305,1281,0,24707,2691,2627,24769,34561,1793,0,3076,20739,24899,2691,34562,2753,1281,0,2624,33537,0,16385,24641,1537,1793,0,193,8279,21589,516,12549,1538,2629,513,0,38336,65281,32769,0,32258,2561,2689,32258,3008,514,3009,769,0,5574,510,2551,
 2,0,9678,208,769,0,5582,226,135,0,2598,5606,236,2,0,95,242,128,5573,57344,2591,6,5599,256,4,5574,510,3045,5599,460,76,2591,78,5571,65510,5579,12,5570,512,4224,4104,3024,8197,33788,4224,4609,8193,769,0,2640,8197,33785,6145,2625,8193,769,0,8194,761,2574,5572,43690,5579,24,5568,2048,5570,512,2628,4360,2632,2632,8708,769,0,3103,65514,34562,0,305,35406,754,258,119,65160,3024,32403,5579,36,5568,3072,35446,1,740,5570,512,4224,4104,3024,8197,33788,5569,3,2574,3039,454,528,5582,24,4224,2632,2632,8200,769,
@@ -36,10 +36,10 @@ function eb(a){var b=a.i,c,d,f,e=b.V>>13&7;"undefined"===typeof b.R[e]&&(b.R[e]=
 b.A|=49152;else if((b.V&15)>=b.F[e])b.P|=32800,b.A|=49152;else{c=(b.V>>4&511)*b.F[e]+(b.V&15);d=(b.A&48)<<12|b.eb;f=65536-b.gb&65535;a.qb(b.R[e],c,d,f);return}}b.fb=e<<13|b.fb&8176|b.V%9&15;I(a.a,20,5,144,function(){b.A=b.A&65534|128;return!!(b.A&64)})}l.pc=function(a,b,c,d,f){var e=this.i;e.eb=d&65535;e.A=e.A&-49|d>>12&48;e.gb=65536-f&65535;switch(a){case 1:e.P|=33024;e.A|=49152;break;case 2:e.P|=33792,e.A|=49152}I(this.a,20,5,144,function(){e.A=e.A&65534|128;return!!(e.A&64)})};
 function gb(a){var b=a.j,c,d,f,e=b.o>>8&3;b.o&=-2;"undefined"===typeof b.R[e]&&(b.R[e]={cache:[],postProcess:a.qc,drive:e,blocksize:128,mapped:1,maxblock:b.Ia[e]*b.F[e],url:"rl"+e+".dsk"});switch(b.o>>1&7){case 2:b.ua&8&&(b.o&=63);b.ua=b.$b[e]|b.Aa&64;break;case 3:1==(b.H&3)&&(b.Aa=b.H&4?b.Aa+(b.H&65408)&65408|b.H<<2&64:b.Aa-(b.H&65408)&65408|b.H<<2&64,b.H=b.Aa);break;case 4:b.ua=b.Aa;break;case 5:if(b.H>>6>=b.Ia[e]){b.o|=37888;break}if((b.H&63)>=b.F[e]){b.o|=37888;break}c=(b.H>>6)*b.F[e]+(b.H&63);
 d=(b.pa&63)<<16|b.$a;f=65536-b.ua&65535;fb(a,b.R[e],c,d,f);return;case 6:if(b.H>>6>=b.Ia[e])b.o|=37888;else if((b.H&63)>=b.F[e])b.o|=37888;else{c=(b.H>>6)*b.F[e]+(b.H&63);d=(b.pa&63)<<16|b.$a;f=65536-b.ua&65535;a.qb(b.R[e],c,d,f);return}}I(a.a,20,5,112,function(){b.o|=129;return!!(b.o&64)})}
-l.qc=function(a,b,c,d,f){var e=this.j;e.$a=d&65535;e.o=e.o&-49|d>>12&48;e.pa=d>>16&63;e.H=~~(c/e.F[b.ha])<<6|c%e.F[b.ha];e.Aa=e.H;e.ua=65536-f&65535;switch(a){case 1:e.o|=33792;break;case 2:e.o|=40960}I(this.a,20,5,112,function(){e.o|=129;return!!(e.o&64)})};function hb(a){a=a.l;a.D=2176;a.ca=0;a.S=[4544,4544,4544,4544,4544,4544,4544,4544];a.Ta=[0,0,0,0,0,0,0,0];a.Na=a.Ua=a.Sa=a.za=a.Gb=0}
-function ib(a,b){var c=a.l,d,f,e;c.D&=-16513;c.ca&=-2049;c.S[b]&=-1153;I(a.a,-1,0,172);"undefined"===typeof c.R[b]&&(c.R[b]={cache:[],postProcess:a.rc,drive:b,blocksize:256,mapped:0,maxblock:c.xb[0]*c.Ha[0]*c.F[0],url:"rp"+b+".dsk"});switch(c.D&63){case 5:c.ub[b]=c.ja[b];c.D|=32896;c.S[b]|=32896;c.Na|=1<<b;break;case 9:hb(a);break;case 19:c.S[b]|=64;break;case 49:if(c.ja[b]>=c.xb[0]||c.da[b]>>8>=c.Ha[0]||(c.da[b]&255)>=c.F[0]){c.Ta[b]|=1024;c.D|=49152;break}d=(c.ja[b]*c.Ha[0]+(c.da[b]>>8))*c.F[0]+
-(c.da[b]&255);f=(c.za&63)<<16|c.Sa;e=65536-c.Ua&65535;fb(a,c.R[b],d,f,e);return;case 57:if(c.ja[b]>=c.xb[0]||c.da[b]>>8>=c.Ha[0]||(c.da[b]&255)>=c.F[0])c.Ta[b]|=1024,c.D|=49152;else{d=(c.ja[b]*c.Ha[0]+(c.da[b]>>8))*c.F[0]+(c.da[b]&255);f=(c.za&63)<<16|c.Sa;e=65536-c.Ua&65535;a.qb(c.R[b],d,f,e);return}}I(a.a,3,5,172,function(){c.D=c.D&65534|128;c.S[b]|=128;return!!(c.D&64)})}
-l.rc=function(a,b,c,d,f){var e=this.l;e.Ua=65536-f&65535;e.Sa=d&65535;e.D=e.D&-769|d>>8&768;e.za=d>>16&63;f=~~(c/e.F[0]);d=~~(f/e.Ha[0]);e.da[b.ha]=f%e.Ha[0]<<8|c%e.F[0];e.ub[b.ha]=e.ja[b.ha]=d;e.Na|=1<<b.ha;c>=b.ic-1&&(e.S[b.ha]|=1024);switch(a){case 1:e.ca|=512;e.D|=49152;break;case 2:e.ca|=2048,e.D|=49152}I(this.a,20,5,172,function(){e.S[b.ha]|=128;e.D=e.D&65534|128;return!!(e.D&64)})};
+l.qc=function(a,b,c,d,f){var e=this.j;e.$a=d&65535;e.o=e.o&-49|d>>12&48;e.pa=d>>16&63;e.H=~~(c/e.F[b.ha])<<6|c%e.F[b.ha];e.Aa=e.H;e.ua=65536-f&65535;switch(a){case 1:e.o|=33792;break;case 2:e.o|=40960}I(this.a,20,5,112,function(){e.o|=129;return!!(e.o&64)})};function hb(a){a=a.l;a.D=2176;a.ba=0;a.S=[4544,4544,4544,4544,4544,4544,4544,4544];a.Ta=[0,0,0,0,0,0,0,0];a.Na=a.Ua=a.Sa=a.za=a.Gb=0}
+function ib(a,b){var c=a.l,d,f,e;c.D&=-16513;c.ba&=-2049;c.S[b]&=-1153;I(a.a,-1,0,172);"undefined"===typeof c.R[b]&&(c.R[b]={cache:[],postProcess:a.rc,drive:b,blocksize:256,mapped:0,maxblock:c.xb[0]*c.Ha[0]*c.F[0],url:"rp"+b+".dsk"});switch(c.D&63){case 5:c.ub[b]=c.ja[b];c.D|=32896;c.S[b]|=32896;c.Na|=1<<b;break;case 9:hb(a);break;case 19:c.S[b]|=64;break;case 49:if(c.ja[b]>=c.xb[0]||c.ca[b]>>8>=c.Ha[0]||(c.ca[b]&255)>=c.F[0]){c.Ta[b]|=1024;c.D|=49152;break}d=(c.ja[b]*c.Ha[0]+(c.ca[b]>>8))*c.F[0]+
+(c.ca[b]&255);f=(c.za&63)<<16|c.Sa;e=65536-c.Ua&65535;fb(a,c.R[b],d,f,e);return;case 57:if(c.ja[b]>=c.xb[0]||c.ca[b]>>8>=c.Ha[0]||(c.ca[b]&255)>=c.F[0])c.Ta[b]|=1024,c.D|=49152;else{d=(c.ja[b]*c.Ha[0]+(c.ca[b]>>8))*c.F[0]+(c.ca[b]&255);f=(c.za&63)<<16|c.Sa;e=65536-c.Ua&65535;a.qb(c.R[b],d,f,e);return}}I(a.a,3,5,172,function(){c.D=c.D&65534|128;c.S[b]|=128;return!!(c.D&64)})}
+l.rc=function(a,b,c,d,f){var e=this.l;e.Ua=65536-f&65535;e.Sa=d&65535;e.D=e.D&-769|d>>8&768;e.za=d>>16&63;f=~~(c/e.F[0]);d=~~(f/e.Ha[0]);e.ca[b.ha]=f%e.Ha[0]<<8|c%e.F[0];e.ub[b.ha]=e.ja[b.ha]=d;e.Na|=1<<b.ha;c>=b.ic-1&&(e.S[b.ha]|=1024);switch(a){case 1:e.ba|=512;e.D|=49152;break;case 2:e.ba|=2048,e.D|=49152}I(this.a,20,5,172,function(){e.S[b.ha]|=128;e.D=e.D&65534|128;return!!(e.D&64)})};
 function jb(a,b,c,d,f,e){var g=~~((e+c.qa-1)/c.qa),h=new XMLHttpRequest;2048>g&&d+2048<c.ic&&(g=2048);h.open("GET",c.url,!0);h.setRequestHeader("Range","bytes="+(d*c.qa<<1)+"-"+(((d+g)*c.qa<<1)-1));h.responseType="arraybuffer";h.onreadystatechange=function(){if(4==h.readyState){var g=b.bind(a),m,r,v,D;m=h.response;if(h.status&&206!=h.status||!m)c.Db(1,c,d,f,e);else{m=new Uint8Array(m);r=d;for(D=0;D<m.length;){if("undefined"===typeof c.cache[r])for(c.cache[r]=[],v=0;v<c.qa;v++)c.cache[r][v]=D<m.length?
 m[D]&255|m[D+1]<<8&65280:0,D+=2;else D+=c.qa<<1;r++}g(c,d,f,e)}}};h.send(null)}function J(a,b,c,d,f){c&1?f?d=0<=d?d<<8&65280|b&255:b:K(a.a,4):0<=d?f&&(d=b&65280|d&255):d=b;return d}l.qb=function(a,b,c,d){for(var f;0<d;){if("undefined"===typeof a.cache[b]){jb(this,this.qb,a,b,c,d);return}for(f=0;f<a.qa&&0<d;f++){var e=a.hc?kb(this.a,c):c;Ua(this.a.B,e,a.cache[b][f]&65535);c+=2;--d}b++}a.Db(0,a,b,c,d)};
 function fb(a,b,c,d,f){for(var e,g;0<f;){if("undefined"===typeof b.cache[c])for(b.cache[c]=[],e=0;e<b.qa;e++)b.cache[c][e]=0;for(e=0;e<b.qa&&0<f;e++){g=a.a.sb(b.hc?kb(a.a,d):d);if(0>g){b.Db(2,b,c,d,f);return}b.cache[c][e]=g;d+=2;--f}c++}b.Db(0,b,c,d,f)}l.reset=function(){this.g.Ra=this.g.Ra&-120|20;this.b.U=0;this.b.W=128;this.f.ta=0;this.i.A=128;this.j.o=128;hb(this)};
@@ -47,8 +47,8 @@ l.Zb=function(a,b,c){var d,f,e=this.a;switch(a&-64){case 4194240:switch(a&-2){ca
 255);case 4194286:case 4194284:case 4194282:case 4194280:case 4194278:case 4194276:case 4194274:case 4194272:if(70!==e.Ja)return K(e,4);f=a-4194272>>1;0>b?d=e.Cb[f]:(d=J(this,e.Cb[f],a,b,c),0<=d&&(e.Cb[f]=d));break;case 4194254:return a&1?e.w>>14&1?(0<=b&&(e.c[6]=b),d=e.c[6]):(0<=b&&(e.ga[3]=b),d=e.ga[3]):e.w>>14&0?(0<=b&&(e.c[6]=b),d=e.c[6]):(0<=b&&(e.ga[1]=b),d=e.ga[1]),d;case 4194252:case 4194250:case 4194248:return f=a&7,e.w&2048?(0<=b&&(e.c[f]=b),d=e.c[f]):(0<=b&&(e.Ma[f]=b),d=e.Ma[f]),d;case 4194246:return a&
 1?(0<=b&&(e.c[7]=b),d=e.c[7]):e.w>>14&0?(0<=b&&(e.c[6]=b),d=e.c[6]):(0<=b&&(e.ga[0]=b),d=e.ga[0]),d;case 4194244:case 4194242:case 4194240:return f=a&7,e.w&2048?(0<=b&&(e.Ma[f]=b),d=e.Ma[f]):(0<=b&&(e.c[f]=b),d=e.c[f]),d;default:return e.m|=16,K(e,4)}break;case 4194176:f=a>>1&31;d=J(this,e.O[3][f],a,b,c);0<=d&&(e.O[3][f]=d,e.O[3][f&15]&=65295);break;case 4194112:var g=this.b;switch(a&-2){case 4194174:d=J(this,e.tb,a,b,c);0<=d&&(e.tb=d);break;case 4194172:d=e.xa;d&65280&&(d=(d<<8|d>>8)&65535);break;
 case 4194168:0>b?d=this.g.zc&65535:(d=J(this,this.g.data,a,b,c),0<=d&&(this.g.data=d));break;case 4194166:0<=b&&(b&127&&(g.bc=0),g.W&=-129,I(e,100,4,52,function(){g.W|=128;return!!(g.W&64)}));d=0;break;case 4194162:d=0;0>b&&(g.U&=-129,0<g.Eb.length&&(d=g.Eb.shift(),0<g.Eb.length&&setTimeout(function(){g.U|=128;g.U&64&&I(e,40,4,48)},50)));break;case 4194160:0>b?d=g.U:(d=J(this,g.U,a,b,c),0<=d&&(g.U=g.U&128|d&-129));break;default:return e.m|=16,K(e,4)}break;case 4194048:f=this.i;switch(a&-2){case 4194048:d=
-J(this,f.fb,a,b,c);0<=d&&(f.fb=d);break;case 4194050:d=J(this,f.P,a,b,c);0<=d&&(f.P=d);break;case 4194052:d=J(this,f.A,a,b,c);0<=b&&0<=d&&(f.A=d&-36993|f.A&36992,f.A&1&&eb(this));break;case 4194054:d=J(this,f.gb,a,b,c);0<=d&&(f.gb=d);break;case 4194056:d=J(this,f.eb,a,b,c);0<=d&&(f.eb=d);break;case 4194058:d=J(this,f.V,a,b,c);0<=d&&(f.V=d);break;case 4194060:break;case 4194062:d=J(this,f.Sb,a,b,c);0<=d&&(f.Sb=d);break;default:return e.m|=16,K(e,4)}break;case 4193728:var h=this.l;f=h.ca&7;switch(a&
--2){case 4193728:d=J(this,h.D,a,b,c);0<=b&&0<=d&&(h.za=h.za&60|d>>8&3,h.D=d&17279|h.D&34944|2048,d&1&&h.D&128?ib(this,f):192==(d&192)&&I(e,0,5,172));break;case 4193730:d=J(this,h.Ua,a,b,c);0<=d&&(h.Ua=d);break;case 4193732:d=J(this,h.Sa,a,b,c);0<=d&&(h.Sa=d&65534);break;case 4193734:d=J(this,h.da[f],a,b,c);0<=d&&(h.da[f]=d&7967);break;case 4193736:d=J(this,h.ca,a,b,c);0<=d&&(h.ca=d&63|h.ca&65472,d&128&&hb(this));break;case 4193738:d=h.S[f];break;case 4193740:d=h.Ta[f];break;case 4193742:d=J(this,
+J(this,f.fb,a,b,c);0<=d&&(f.fb=d);break;case 4194050:d=J(this,f.P,a,b,c);0<=d&&(f.P=d);break;case 4194052:d=J(this,f.A,a,b,c);0<=b&&0<=d&&(f.A=d&-36993|f.A&36992,f.A&1&&eb(this));break;case 4194054:d=J(this,f.gb,a,b,c);0<=d&&(f.gb=d);break;case 4194056:d=J(this,f.eb,a,b,c);0<=d&&(f.eb=d);break;case 4194058:d=J(this,f.V,a,b,c);0<=d&&(f.V=d);break;case 4194060:break;case 4194062:d=J(this,f.Sb,a,b,c);0<=d&&(f.Sb=d);break;default:return e.m|=16,K(e,4)}break;case 4193728:var h=this.l;f=h.ba&7;switch(a&
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