From c80f22e23ae4410d5e9729396b8df16cce559e9f Mon Sep 17 00:00:00 2001
From: Jeff Parsons <Jeff@pcjs.org>
Date: Thu, 5 May 2016 13:04:46 -0700
Subject: [PATCH] Cleaned up the handling of PS bits (not to be confused with
 PSW, which is PS combined with A); this fixes a bug where POP PSW was
 inadvertently disabling the internal interrupt flag (IF)

---
 modules/pc8080/lib/cpudef.js         |  15 +-
 modules/pc8080/lib/cpuops.js         |   6 +-
 modules/pc8080/lib/cpusim.js         | 392 ++++++++++++++-------------
 modules/pc8080/lib/debugger.js       |  60 ++--
 versions/pc8080/1.22.0/pc8080-dbg.js | 108 ++++----
 versions/pc8080/1.22.0/pc8080.js     |   6 +-
 6 files changed, 310 insertions(+), 277 deletions(-)

diff --git a/modules/pc8080/lib/cpudef.js b/modules/pc8080/lib/cpudef.js
index 6002ff022..ec6dce7fa 100644
--- a/modules/pc8080/lib/cpudef.js
+++ b/modules/pc8080/lib/cpudef.js
@@ -69,7 +69,7 @@ var CPUDef = {
         BIT5:   0x0020,         // bit 5: reserved, always clear
         ZF:     0x0040,         // bit 6: Zero flag
         SF:     0x0080,         // bit 7: Sign flag
-        ALL:    0x00D5,         // CF, PF, AF, ZF, SF
+        ALL:    0x00D5,         // all "arithmetic" flags (CF, PF, AF, ZF, SF)
         MASK:   0x00FF,         //
         IF:     0x0200          // bit 9: Interrupt flag (for internal use only)
     },
@@ -113,18 +113,19 @@ var CPUDef = {
 };
 
 /*
- * Some PS flags are stored directly in regPS, hence the "direct" designation.
+ * These are the internal PS bits (outside of PS.MASK) that getPS() and setPS() can get and set,
+ * but which cannot be seen with any of the documented instructions.
  */
-CPUDef.PS.DIRECT    =   (CPUDef.PS.IF);
+CPUDef.PS.INTERNAL  =   (CPUDef.PS.IF);
 
 /*
- * However, PS "arithmetic" flags are NOT stored in regPS; they are maintained across
- * separate result registers, hence the "indirect" designation.
+ * PS "arithmetic" flags are NOT stored in regPS; they are maintained across separate result registers,
+ * hence the RESULT designation.
  */
-CPUDef.PS.INDIRECT  =   (CPUDef.PS.CF | CPUDef.PS.PF | CPUDef.PS.AF | CPUDef.PS.ZF | CPUDef.PS.SF);
+CPUDef.PS.RESULT    =   (CPUDef.PS.CF | CPUDef.PS.PF | CPUDef.PS.AF | CPUDef.PS.ZF | CPUDef.PS.SF);
 
 /*
- * These are the default "always set" PS bits for the 8080.
+ * These are the "always set" PS bits for the 8080.
  */
 CPUDef.PS.SET       =   (CPUDef.PS.BIT1);
 
diff --git a/modules/pc8080/lib/cpuops.js b/modules/pc8080/lib/cpuops.js
index d3f23d153..d7578c336 100644
--- a/modules/pc8080/lib/cpuops.js
+++ b/modules/pc8080/lib/cpuops.js
@@ -2703,9 +2703,7 @@ CPUDef.opRP = function()
  */
 CPUDef.opPOPSW = function()
 {
-    var w = this.popWord();
-    this.setPS(w);
-    this.regA = w >> 8;
+    this.setPSW(this.popWord());
     this.nStepCycles -= 10;
 };
 
@@ -2755,7 +2753,7 @@ CPUDef.opCP = function()
  */
 CPUDef.opPUPSW = function()
 {
-    this.pushWord((this.getPS() & 0xff) | (this.regA << 8));
+    this.pushWord(this.getPSW());
     this.nStepCycles -= 11;
 };
 
diff --git a/modules/pc8080/lib/cpusim.js b/modules/pc8080/lib/cpusim.js
index ab2c6fec2..e0a413ae8 100644
--- a/modules/pc8080/lib/cpusim.js
+++ b/modules/pc8080/lib/cpusim.js
@@ -162,8 +162,7 @@ CPUSim.prototype.resetRegs = function()
     this.setPC(this.addrReset);
 
     /*
-     * This resets the Processor Status flags (regPS), along with all the internal "result registers";
-     * we've taken care to ensure that both CPL and IOPL are initialized before this first setPS() call.
+     * This resets the Processor Status flags (regPS), along with all the internal "result registers".
      */
     this.setPS(0);
 
@@ -415,6 +414,16 @@ CPUSim.prototype.setPC = function(off)
     this.regPC = off & 0xffff;
 };
 
+/**
+ * clearCF()
+ *
+ * @this {CPUSim}
+ */
+CPUSim.prototype.clearCF = function()
+{
+    this.resultZeroCarry &= 0xff;
+};
+
 /**
  * getCF()
  *
@@ -426,121 +435,6 @@ CPUSim.prototype.getCF = function()
     return (this.resultZeroCarry & 0x100)? CPUDef.PS.CF : 0;
 };
 
-/**
- * getPF()
- *
- * @this {CPUSim}
- * @return {number} 0 or CPUDef.PS.PF
- */
-CPUSim.prototype.getPF = function()
-{
-    return (CPUDef.PARITY[this.resultParitySign & 0xff])? CPUDef.PS.PF : 0;
-};
-
-/**
- * getAF()
- *
- * @this {CPUSim}
- * @return {number} 0 or CPUDef.PS.AF
- */
-CPUSim.prototype.getAF = function()
-{
-    return ((this.resultParitySign ^ this.resultAuxOverflow) & 0x10)? CPUDef.PS.AF : 0;
-};
-
-/**
- * getZF()
- *
- * @this {CPUSim}
- * @return {number} 0 or CPUDef.PS.ZF
- */
-CPUSim.prototype.getZF = function()
-{
-    return (this.resultZeroCarry & 0xff)? 0 : CPUDef.PS.ZF;
-};
-
-/**
- * getSF()
- *
- * @this {CPUSim}
- * @return {number} 0 or CPUDef.PS.SF
- */
-CPUSim.prototype.getSF = function()
-{
-    return (this.resultParitySign & 0x80)? CPUDef.PS.SF : 0;
-};
-
-/**
- * getIF()
- *
- * @this {CPUSim}
- * @return {number} 0 or CPUDef.PS.IF
- */
-CPUSim.prototype.getIF = function()
-{
-    return (this.regPS & CPUDef.PS.IF);
-};
-
-/**
- * clearCF()
- *
- * @this {CPUSim}
- */
-CPUSim.prototype.clearCF = function()
-{
-    this.resultZeroCarry &= 0xff;
-};
-
-/**
- * clearPF()
- *
- * @this {CPUSim}
- */
-CPUSim.prototype.clearPF = function()
-{
-    if (this.getPF()) this.resultParitySign ^= 0x1;
-};
-
-/**
- * clearAF()
- *
- * @this {CPUSim}
- */
-CPUSim.prototype.clearAF = function()
-{
-    this.resultAuxOverflow = (this.resultParitySign & 0x10) | (this.resultAuxOverflow & ~0x10);
-};
-
-/**
- * clearZF()
- *
- * @this {CPUSim}
- */
-CPUSim.prototype.clearZF = function()
-{
-    this.resultZeroCarry |= 0xff;
-};
-
-/**
- * clearSF()
- *
- * @this {CPUSim}
- */
-CPUSim.prototype.clearSF = function()
-{
-    if (this.getSF()) this.resultParitySign ^= 0xc0;
-};
-
-/**
- * clearIF()
- *
- * @this {CPUSim}
- */
-CPUSim.prototype.clearIF = function()
-{
-    this.regPS &= ~CPUDef.PS.IF;
-};
-
 /**
  * setCF()
  *
@@ -551,71 +445,6 @@ CPUSim.prototype.setCF = function()
     this.resultZeroCarry |= 0x100;
 };
 
-/**
- * setPF()
- *
- * @this {CPUSim}
- */
-CPUSim.prototype.setPF = function()
-{
-    if (!this.getPF()) this.resultParitySign ^= 0x1;
-};
-
-/**
- * setAF()
- *
- * @this {CPUSim}
- */
-CPUSim.prototype.setAF = function()
-{
-    this.resultAuxOverflow = (~this.resultParitySign & 0x10) | (this.resultAuxOverflow & ~0x10);
-};
-
-/**
- * setZF()
- *
- * @this {CPUSim}
- */
-CPUSim.prototype.setZF = function()
-{
-    this.resultZeroCarry &= ~0xff;
-};
-
-/**
- * setSF()
- *
- * @this {CPUSim}
- */
-CPUSim.prototype.setSF = function()
-{
-    if (!this.getSF()) this.resultParitySign ^= 0xc0;
-};
-
-/**
- * setIF()
- *
- * @this {CPUSim}
- */
-CPUSim.prototype.setIF = function()
-{
-    this.regPS |= CPUDef.PS.IF;
-};
-
-/**
- * updateAF(fAuxCarry)
- *
- * @this {CPUSim}
- * @param {boolean} fAuxCarry
- */
-CPUSim.prototype.updateAF = function(fAuxCarry)
-{
-    if (fAuxCarry) {
-        this.setAF();
-    } else {
-        this.clearAF();
-    }
-};
-
 /**
  * updateCF(fCarry)
  *
@@ -631,6 +460,176 @@ CPUSim.prototype.updateCF = function(fCarry)
     }
 };
 
+/**
+ * clearPF()
+ *
+ * @this {CPUSim}
+ */
+CPUSim.prototype.clearPF = function()
+{
+    if (this.getPF()) this.resultParitySign ^= 0x1;
+};
+
+/**
+ * getPF()
+ *
+ * @this {CPUSim}
+ * @return {number} 0 or CPUDef.PS.PF
+ */
+CPUSim.prototype.getPF = function()
+{
+    return (CPUDef.PARITY[this.resultParitySign & 0xff])? CPUDef.PS.PF : 0;
+};
+
+/**
+ * setPF()
+ *
+ * @this {CPUSim}
+ */
+CPUSim.prototype.setPF = function()
+{
+    if (!this.getPF()) this.resultParitySign ^= 0x1;
+};
+
+/**
+ * clearAF()
+ *
+ * @this {CPUSim}
+ */
+CPUSim.prototype.clearAF = function()
+{
+    this.resultAuxOverflow = (this.resultParitySign & 0x10) | (this.resultAuxOverflow & ~0x10);
+};
+
+/**
+ * getAF()
+ *
+ * @this {CPUSim}
+ * @return {number} 0 or CPUDef.PS.AF
+ */
+CPUSim.prototype.getAF = function()
+{
+    return ((this.resultParitySign ^ this.resultAuxOverflow) & 0x10)? CPUDef.PS.AF : 0;
+};
+
+/**
+ * setAF()
+ *
+ * @this {CPUSim}
+ */
+CPUSim.prototype.setAF = function()
+{
+    this.resultAuxOverflow = (~this.resultParitySign & 0x10) | (this.resultAuxOverflow & ~0x10);
+};
+
+/**
+ * updateAF(fAuxCarry)
+ *
+ * @this {CPUSim}
+ * @param {boolean} fAuxCarry
+ */
+CPUSim.prototype.updateAF = function(fAuxCarry)
+{
+    if (fAuxCarry) {
+        this.setAF();
+    } else {
+        this.clearAF();
+    }
+};
+
+/**
+ * clearZF()
+ *
+ * @this {CPUSim}
+ */
+CPUSim.prototype.clearZF = function()
+{
+    this.resultZeroCarry |= 0xff;
+};
+
+/**
+ * getZF()
+ *
+ * @this {CPUSim}
+ * @return {number} 0 or CPUDef.PS.ZF
+ */
+CPUSim.prototype.getZF = function()
+{
+    return (this.resultZeroCarry & 0xff)? 0 : CPUDef.PS.ZF;
+};
+
+/**
+ * setZF()
+ *
+ * @this {CPUSim}
+ */
+CPUSim.prototype.setZF = function()
+{
+    this.resultZeroCarry &= ~0xff;
+};
+
+/**
+ * clearSF()
+ *
+ * @this {CPUSim}
+ */
+CPUSim.prototype.clearSF = function()
+{
+    if (this.getSF()) this.resultParitySign ^= 0xc0;
+};
+
+/**
+ * getSF()
+ *
+ * @this {CPUSim}
+ * @return {number} 0 or CPUDef.PS.SF
+ */
+CPUSim.prototype.getSF = function()
+{
+    return (this.resultParitySign & 0x80)? CPUDef.PS.SF : 0;
+};
+
+/**
+ * setSF()
+ *
+ * @this {CPUSim}
+ */
+CPUSim.prototype.setSF = function()
+{
+    if (!this.getSF()) this.resultParitySign ^= 0xc0;
+};
+
+/**
+ * clearIF()
+ *
+ * @this {CPUSim}
+ */
+CPUSim.prototype.clearIF = function()
+{
+    this.regPS &= ~CPUDef.PS.IF;
+};
+
+/**
+ * getIF()
+ *
+ * @this {CPUSim}
+ * @return {number} 0 or CPUDef.PS.IF
+ */
+CPUSim.prototype.getIF = function()
+{
+    return (this.regPS & CPUDef.PS.IF);
+};
+
+/**
+ * setIF()
+ *
+ * @this {CPUSim}
+ */
+CPUSim.prototype.setIF = function()
+{
+    this.regPS |= CPUDef.PS.IF;
+};
+
 /**
  * getPS()
  *
@@ -639,7 +638,7 @@ CPUSim.prototype.updateCF = function(fCarry)
  */
 CPUSim.prototype.getPS = function()
 {
-    return (this.regPS & ~CPUDef.PS.INDIRECT) | (this.getSF() | this.getZF() | this.getAF() | this.getPF() | this.getCF());
+    return (this.regPS & ~CPUDef.PS.RESULT) | (this.getSF() | this.getZF() | this.getAF() | this.getPF() | this.getCF());
 };
 
 /**
@@ -656,8 +655,31 @@ CPUSim.prototype.setPS = function(regPS)
     if (regPS & CPUDef.PS.AF) this.resultAuxOverflow |= 0x10;
     if (!(regPS & CPUDef.PS.ZF)) this.resultZeroCarry |= 0xff;
     if (regPS & CPUDef.PS.SF) this.resultParitySign ^= 0xc0;
-    this.regPS = (this.regPS & ~CPUDef.PS.DIRECT) | (regPS & CPUDef.PS.DIRECT) | CPUDef.PS.SET;
-    Component.assert((regPS & CPUDef.PS.INDIRECT) == (this.getPS() & CPUDef.PS.INDIRECT));
+    this.regPS = (this.regPS & ~(CPUDef.PS.RESULT | CPUDef.PS.INTERNAL)) | (regPS & CPUDef.PS.INTERNAL) | CPUDef.PS.SET;
+    Component.assert((regPS & CPUDef.PS.RESULT) == (this.getPS() & CPUDef.PS.RESULT));
+};
+
+/**
+ * getPSW()
+ *
+ * @this {CPUSim}
+ * @return {number}
+ */
+CPUSim.prototype.getPSW = function()
+{
+    return (this.getPS() & CPUDef.PS.MASK) | (this.regA << 8);
+};
+
+/**
+ * setPSW(w)
+ *
+ * @this {CPUSim}
+ * @param {number} w
+ */
+CPUSim.prototype.setPSW = function(w)
+{
+    this.setPS((w & CPUDef.PS.MASK) | (this.regPS & ~CPUDef.PS.MASK));
+    this.regA = w >> 8;
 };
 
 /**
diff --git a/modules/pc8080/lib/debugger.js b/modules/pc8080/lib/debugger.js
index e58ea61e9..7ca601724 100644
--- a/modules/pc8080/lib/debugger.js
+++ b/modules/pc8080/lib/debugger.js
@@ -321,10 +321,15 @@ if (DEBUGGER) {
     Debugger.REG_HL     = 0x0A;
     Debugger.REG_SP     = 0x0B;
     Debugger.REG_PC     = 0x0C;
-    Debugger.REG_PS     = 0x0D;         // aka PSW (aka AF if Z80-style mnemonics)
+    Debugger.REG_PS     = 0x0D;
+    Debugger.REG_PSW    = 0x0E;         // aka AF if Z80-style mnemonics
 
+    /*
+     * NOTE: "PS" is the complete processor status, which includes bits like the Interrupt flag (IF),
+     * which is NOT the same as "PSW", which is the low 8 bits of "PS" combined with "A" in the high byte.
+     */
     Debugger.REGS = [
-        "B", "C", "D", "E", "H", "L", "M", "A", "BC", "DE", "HL", "SP", "PC", "PSW"
+        "B", "C", "D", "E", "H", "L", "M", "A", "BC", "DE", "HL", "SP", "PC", "PS", "PSW"
     ];
 
     /*
@@ -370,7 +375,7 @@ if (DEBUGGER) {
     Debugger.TYPE_HL    = (Debugger.REG_HL << 8 | Debugger.TYPE_REG | Debugger.TYPE_WORD);
     Debugger.TYPE_SP    = (Debugger.REG_SP << 8 | Debugger.TYPE_REG | Debugger.TYPE_WORD);
     Debugger.TYPE_PC    = (Debugger.REG_PC << 8 | Debugger.TYPE_REG | Debugger.TYPE_WORD);
-    Debugger.TYPE_PS    = (Debugger.REG_PS << 8 | Debugger.TYPE_REG | Debugger.TYPE_WORD);
+    Debugger.TYPE_PSW   = (Debugger.REG_PSW<< 8 | Debugger.TYPE_REG | Debugger.TYPE_WORD);
 
     /*
      * TYPE_OTHER bit definitions
@@ -642,11 +647,11 @@ if (DEBUGGER) {
     /* 0xEE */  [Debugger.INS.XRI,   Debugger.TYPE_A    | Debugger.TYPE_OPT, Debugger.TYPE_IMM | Debugger.TYPE_BYTE],
     /* 0xEF */  [Debugger.INS.RST,   Debugger.TYPE_INT],
     /* 0xF0 */  [Debugger.INS.RP],
-    /* 0xF1 */  [Debugger.INS.POP,   Debugger.TYPE_PS],
+    /* 0xF1 */  [Debugger.INS.POP,   Debugger.TYPE_PSW],
     /* 0xF2 */  [Debugger.INS.JP,    Debugger.TYPE_ADDR],
     /* 0xF3 */  [Debugger.INS.DI],
     /* 0xF4 */  [Debugger.INS.CP,    Debugger.TYPE_ADDR],
-    /* 0xF5 */  [Debugger.INS.PUSH,  Debugger.TYPE_PS],
+    /* 0xF5 */  [Debugger.INS.PUSH,  Debugger.TYPE_PSW],
     /* 0xF6 */  [Debugger.INS.ORI,   Debugger.TYPE_A    | Debugger.TYPE_OPT, Debugger.TYPE_IMM | Debugger.TYPE_BYTE],
     /* 0xF7 */  [Debugger.INS.RST,   Debugger.TYPE_INT],
     /* 0xF8 */  [Debugger.INS.RM],
@@ -1347,8 +1352,8 @@ if (DEBUGGER) {
         if (off == null) {
             i = usr.indexOf(Debugger.REGS, sReg);
         } else {
-            i = usr.indexOf(Debugger.REGS, sReg.substr(off, 3));
-            if (i < 0) i = usr.indexOf(Debugger.REGS, sReg.substr(off, 2));
+            i = usr.indexOf(Debugger.REGS, sReg.substr(off, 2));
+            if (i < 0) i = usr.indexOf(Debugger.REGS, sReg.substr(off, 1));
         }
         return i;
     };
@@ -1382,6 +1387,7 @@ if (DEBUGGER) {
             case Debugger.REG_SP:
             case Debugger.REG_PC:
             case Debugger.REG_PS:
+            case Debugger.REG_PSW:
                 cch = 4;
                 break;
             }
@@ -1442,7 +1448,10 @@ if (DEBUGGER) {
                 n = cpu.getPC();
                 break;
             case Debugger.REG_PS:
-                n = (cpu.regA << 8) | (cpu.getPS() & 0xff);
+                n = cpu.getPS();
+                break;
+            case Debugger.REG_PSW:
+                n = cpu.getPSW();
                 break;
             default:
                 break;
@@ -2581,29 +2590,29 @@ if (DEBUGGER) {
     {
         var b;
         switch (sFlag) {
-        case 'I':
+        case "IF":
             b = this.cpu.getIF();
             break;
-        case 'S':
+        case "SF":
             b = this.cpu.getSF();
             break;
-        case 'Z':
+        case "ZF":
             b = this.cpu.getZF();
             break;
-        case 'A':
+        case "AF":
             b = this.cpu.getAF();
             break;
-        case 'P':
+        case "PF":
             b = this.cpu.getPF();
             break;
-        case 'C':
+        case "CF":
             b = this.cpu.getCF();
             break;
         default:
             b = 0;
             break;
         }
-        return sFlag + (b? '1' : '0') + ' ';
+        return sFlag.charAt(0) + (b? '1' : '0') + ' ';
     };
 
     /**
@@ -2624,7 +2633,7 @@ if (DEBUGGER) {
      *
      * Sample 8080 register dump:
      *
-     *      A=00 BC=0000 DE=0000 HL=0000 SP=0000 PSW=0002 I0 S0 Z0 A0 P0 C0
+     *      A=00 BC=0000 DE=0000 HL=0000 SP=0000 I0 S0 Z0 A0 P0 C0
      *      0000 00         NOP
      *
      * @this {Debugger}
@@ -2638,8 +2647,8 @@ if (DEBUGGER) {
             this.getRegOutput(Debugger.REG_DE) +
             this.getRegOutput(Debugger.REG_HL) +
             this.getRegOutput(Debugger.REG_SP) +
-            this.getFlagOutput('I') + this.getFlagOutput('S') + this.getFlagOutput('Z') +
-            this.getFlagOutput('A') + this.getFlagOutput('P') + this.getFlagOutput('C');
+            this.getFlagOutput("IF") + this.getFlagOutput("SF") + this.getFlagOutput("ZF") +
+            this.getFlagOutput("AF") + this.getFlagOutput("PF") + this.getFlagOutput("CF");
         return s;
     };
 
@@ -4131,22 +4140,25 @@ if (DEBUGGER) {
                 case "PS":
                     cpu.setPS(w);
                     break;
-                case 'C':
+                case "PSW":
+                    cpu.setPSW(w);
+                    break;
+                case "CF":
                     if (w) cpu.setCF(); else cpu.clearCF();
                     break;
-                case 'P':
+                case "PF":
                     if (w) cpu.setPF(); else cpu.clearPF();
                     break;
-                case 'A':
+                case "AF":
                     if (w) cpu.setAF(); else cpu.clearAF();
                     break;
-                case 'Z':
+                case "ZF":
                     if (w) cpu.setZF(); else cpu.clearZF();
                     break;
-                case 'S':
+                case "SF":
                     if (w) cpu.setSF(); else cpu.clearSF();
                     break;
-                case 'I':
+                case "IF":
                     if (w) cpu.setIF(); else cpu.clearIF();
                     break;
                 default:
diff --git a/versions/pc8080/1.22.0/pc8080-dbg.js b/versions/pc8080/1.22.0/pc8080-dbg.js
index 75702bce5..fa2051980 100644
--- a/versions/pc8080/1.22.0/pc8080-dbg.js
+++ b/versions/pc8080/1.22.0/pc8080-dbg.js
@@ -13,32 +13,32 @@ function v(a,b,c,d){this.type=a;b||(b={id:"",name:""});this.id=b.id;this.name=b.
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+case "IF":d.oa=g?d.oa|512:d.oa&-513;break;default:a.g("unknown register: "+e);return}if(!h){a.g("invalid value: "+f);return}rc(d);a.g("updated registers:")}a.g(Pe(a));c&&(a.Y=T(d.M),ie(a,Z(a.Y.D)))}}function af(a,b){b=ia(b);var c=b.match(/^(['"])(.*?)\1$/);c?a.g(fe(a,c[2])):Zd(a,b,!0)}function bf(a,b,c){var d="t"!=b;c=Se(a,c,null,!0)||1;var e=1==c?0:1;"tc"==b&&(e=c,c=1);Ba(c,function(){return gb(a,!0)&&a.bb(e,d,!1)},function(){rc(a.b);gb(a,!1)})}
 function ie(a,b,c,d){if(b=W(a,b,!0)){void 0===d&&(d=1);var e=256;if(void 0!==c){d=W(a,c,!0);if(!d||d.D<b.D)return;e=d.D-b.D;if(256<e){a.g("range too large");return}d=-1}c=0;for(var f;0<e&&d--;){f=hb(a,!1)||a.ba?a.L:null;var h=null!=f?"cycles":null,g=Ve(a,b),l=b.D;if(g[0]&&d&&(!c&&d||0>g[0].indexOf("+"))){var k=g[0]+":";g[2]&&(k+=" "+g[2]);a.g(k)}g[3]&&(h=g[3],f=null);f=oe(a,b,h,f);a.g(f);a.Y=b;e-=b.D-l;c++}}}
 function ae(a,b,c,d){if(c)if(b){0>a.G&&a.C.length&&(a.G=0);if(0>a.G||b!=a.C[a.G])a.C.splice(0,0,b),a.G=0;a.G--}else a.ia?b="end":b=a.C[a.G+1];a=[];if(b){b=b.toLowerCase().replace(/""/g,"'");c=0;var e=null;d=d||";";for(var f=0;f<=b.length;f++){var h=b.charAt(f);if('"'==h||"'"==h)e?h==e&&(e=null):e=h;else if(h==d&&!e||!h)a.push(ia(b.substring(c,f))),c=f+1}}return a}
 function ne(a,b,c){var d=!0;try{b.length&&"end"!=b?c||a.g(">> "+b):(a.ia&&(a.g("ended assemble at "+Z(a.ha.D)),a.Y=a.ha,a.ia=!1),b="");var e=b.charAt(0);if('"'==e||"'"==e)return!0;a.xa=null;if(ib(a)&&0<b.length){a.ia&&(b="a "+Z(a.ha.D)+" "+b);var f=b.replace(/ +/g," ").split(" ");if(f&&f.length)for(var h=f[0],g=h.charAt(0),l=1;l<h.length;l++){var k=h.charAt(l);if("?"==g||"r"==g||"a">k||"z"<k){f[0]=h.substr(l);f.unshift(h.substr(0,l));break}}switch(f[0].charAt(0)){case "a":var n=W(a,f[1],!0);if(n)if(a.ha=
 n,void 0===f[2])a.g("begin assemble at "+Z(n.D)),a.ia=!0,rc(a.b);else{var p;a.g("not supported yet");p=[];if(p.length){for(var x=0;x<p.length;x++)a.ga(n,p[x],1);a.g(oe(a,a.ha))}}break;case "b":a:{var B=f[0],u=f[1],la=b;if("?"==u)a.g("breakpoint commands:"),a.g("\tbi [p]\ttoggle break on input port [p]"),a.g("\tbo [p]\ttoggle break on output port [p]"),a.g("\tbp [a]\tset exec breakpoint at addr [a]"),a.g("\tbr [a]\tset read breakpoint at addr [a]"),a.g("\tbw [a]\tset write breakpoint at addr [a]"),
 a.g("\tbc [a]\tclear breakpoint at addr [a]"),a.g("\tbl\tlist all breakpoints"),a.g("\tbn [n]\tbreak after [n] instruction(s)");else{var w=B.charAt(1);if("l"==w){var da=0,da=da+me(a,a.u),da=da+me(a,a.aa);(da+=me(a,a.H))||a.g("no breakpoints")}else if("n"==w)a.wa=Se(a,u),a.g("break after "+a.wa+" instruction(s)");else if(void 0===u)a.g("missing breakpoint address");else{var K=T();if("*"!=u&&(K=W(a,u,!0),!K))break a;u=r(K.D);"c"==w?null==K.D?(Ld(a),a.g("all breakpoints cleared")):ke(a,a.u,K)||ke(a,
-a.aa,K)||ke(a,a.H,K)||a.g("breakpoint missing: "+Z(K.D)):"i"==w?a.g("breakpoint "+(xb(a.B,K.D)?"enabled":"cleared")+": port "+u+" (input)"):"o"==w?a.g("breakpoint "+(Ib(a.B,K.D)?"enabled":"cleared")+": port "+u+" (output)"):null!=K.D&&($d(a,K,la),"p"==w?a.Ja(a.u,K):"r"==w?a.Ja(a.aa,K):"w"==w?a.Ja(a.H,K):a.g("unknown breakpoint command: "+w))}}}break;case "c":a.ta&&(a.ta.value="");break;case "d":a:{var M,P=f[0],A=f[1],X=f[2],zf=f[3];if("?"==A){var xa="";for(M in Td)a.Fa[M]&&(xa&&(xa+=","),xa+=M);xa+=
-",state,symbols";a.g("dump memory commands:");a.g("\tdb [a] [#]    dump # bytes at address a");a.g("\tdw [a] [#]    dump # words at address a");a.g("\tdd [a] [#]    dump # dwords at address a");a.g("\tdh [#] [#]    dump # instructions from history");xa.length&&a.g("dump extension commands:\n\t"+xa)}else if("state"==A){var re=cf(a.w,!0);"console"==X?console.log(re):(a.ta&&(a.ta.value=""),a.g(re))}else if("symbols"==A)for(var Uc=0;Uc<a.J.length;Uc++){var Vc=a.J[Uc],$a;for($a in Vc.Da)if("."!=$a.charAt(0)){var se=
-Vc.Da[$a].o;if(void 0!==se){var te=Vc.Da[$a].l;te&&($a=te);a.g(Z(se)+" "+$a)}}}else{if("d"==P){for(M in Td)if(f[1]==M){var ue=a.Fa[M];ue?(f.shift(),f.shift(),ue(f)):a.g("no dump registered for "+A);break a}A||(P=a.fc||"db")}else a.fc=P;if("dh"==P){var ve=A,we=X,xe="",ye=0,U=a.qa,ya=a.W;if(ya.length){var Y=+ve||a.Nb,ab=+we||10;isNaN(Y)?Y=ab:xe="more ";Y>ya.length&&(a.g("note: only "+ya.length+" available"),Y=ya.length);U-=Y;0>U&&(null==ya[ya.length-1].D?(Y=U+Y,U=0):U+=ya.length);var Wc=[];"call"==
-we&&(ab=1E5,Wc=["CALL"]);for(void 0!==ve&&a.g(Y+" instructions earlier:");0<ab&&U!=a.qa;){var ze=ya[U++];if(null==ze.D)break;var Ab=T(ze.D),Af=Y--,Ae=oe(a,Ab,"history",Af);(!Wc.length||0<=Ae.indexOf(Wc[0]))&&a.g(Ae);Ab.wb&&(U+=Ab.wb,ab-=Ab.wb,Y-=Ab.wb);U>=ya.length&&(U=0);a.Nb=Y;ye++;ab--}}ye||(a.g("no "+xe+"history available"),a.Nb=void 0)}else{var dc=W(a,A);if(dc){var ec=0;X&&("l"==X.charAt(0)&&(X=X.substr(1)||zf),ec=Se(a,X)>>>0,65536<ec&&(ec=65536));for(var La="",fc="dd"==P?4:"dw"==P?2:1,gc=fc*
-ec||128,Bf=gc+15>>4||1;Bf--&&0<gc;){var hc=0,Xc=0,Bb,Cb="",Yc="",A=Z(dc.D);for(Bb=16;0<Bb&&0<gc;Bb--){var ic=a.X(dc,1),hc=hc|ic<<(Xc++<<3);Xc==fc&&(Cb+=q(hc,2*fc),Cb+=1==fc?9==Bb?"-":" ":"  ",hc=Xc=0);Yc+=32<=ic&&128>ic?String.fromCharCode(ic):".";gc--}La&&(La+="\n");La+=A+"  "+Cb+(0==Bb?" "+Yc:"")}La&&a.g(La);a.Gb=dc}}}}break;case "e":if("else"==f[0])break;var jc=1,Be=255,Ce=a.X,De=a.ga;"ew"==f[0]&&(jc=2,Be=65535,Ce=a.Ha,De=a.vb);var Ee=jc<<1,Fe=f[1];if(null==Fe)a.g("edit memory commands:"),a.g("\teb [a] [...]  edit bytes at address a"),
-a.g("\tew [a] [...]  edit words at address a");else{var kc=W(a,Fe);if(kc)for(var lc=2;lc<f.length;lc++){var Db=Zd(a,f[lc]);if(void 0===Db){a.g("unrecognized value: "+f[lc]);break}Db&~Be&&a.g("warning: "+q(Db)+" exceeds "+jc+"-byte value");var Cf=Ce.call(a,kc);a.g("changing "+Z(kc.D)+" from 0x"+q(Cf,Ee)+" to 0x"+q(Db,Ee));De.call(a,kc,Db,jc)}}break;case "f":Xe(a,f[1]);break;case "g":a:{var Ge=f[1],Df=b;if(void 0!==Ge){var Zc=W(a,Ge,!0);if(!Zc)break a;$d(a,Zc,Df);a.Ja(a.u,Zc,!0)}a.Oa(!0)||c||a.g("cpu busy or unavailable, run command ignored")}break;
-case "h":a:{var $c;if(a.A.ma)$c="halting",a.da();else{if(hb(a,!0))break a;$c="already halted"}c||a.g($c)}break;case "i":if("if"==f[0]){var ad;var Eb=b.substr(2),Eb=ia(Eb);Zd(a,Eb)?(c||a.g("true: "+Eb),ad=!0):(c||a.g("false: "+Eb),ad=!1);ad||(d=!1);break}var bd=f[1];if(bd&&"?"!=bd){var cd=Se(a,bd);if(void 0!==cd){var Ef=yb(a.B,cd);a.g(r(cd)+": "+("0x"+q(Ef,2)))}}else a.g("input commands:"),a.g("\ti [p]\tread port [p]"),a.g("warning: port accesses can affect hardware state");break;case "k":var Ff=f[0];
-if("?"==f[1])a.g("stack trace commands:"),a.g("\tk\tshow frame addresses"),a.g("\tks\tshow symbol information");else{var dd=0,He=T(),Fb=T(a.b.ca);for(a.g("stack trace for "+Z(Fb.D));10>dd;){for(var Ma=null,Gf=256;65536>Fb.D>>>0;){He.D=a.Ha(Fb,2);if(null==Fb.D||!Gf--)break;for(var Hf=a,mc=He,Ie=null,Gb=mc.D,Je=Gb,ed=1;6>=ed&&Gb;ed++){if(2<ed){mc.D=Gb;var nc=oe(Hf,mc);if(0<=nc.indexOf("CALL")){var Ke=nc.indexOf(" ");if(Gb+(nc.indexOf(" ",Ke+1)-Ke-1)/2==Je){Ie=nc;break}}}Gb--}mc.D=Je;if(Ma=Ie)break}if(!Ma||
-null==Ma)break;var Le=null;if("ks"==Ff){var Me=Ma.match(/[0-9A-F]+$/);Me&&(Le=Ze(a,Me[0]))}Ma=ha(Ma,50)+"  ;"+(Le||"stack="+Z(Fb.D));a.g(Ma);dd++}dd||a.g("no return addresses found")}break;case "l":if("ln"==f[0]){Ze(a,f[1],!0);break}break;case "m":a:{var za,Aa=null,G=f[1];"?"==G&&(G=void 0);if(void 0!==G){var Na=0;if("all"==G)Na=1610481663,G=null;else if("on"==G)Aa=!0,G=null;else if("off"==G)Aa=!1,G=null;else{"keys"==G&&(G="key");"kbd"==G&&(G="keyboard");for(za in Td)if(G==za){Na=Td[za];Aa=!!(a.ja&
+a.aa,K)||ke(a,a.H,K)||a.g("breakpoint missing: "+Z(K.D)):"i"==w?a.g("breakpoint "+(xb(a.B,K.D)?"enabled":"cleared")+": port "+u+" (input)"):"o"==w?a.g("breakpoint "+(Ab(a.B,K.D)?"enabled":"cleared")+": port "+u+" (output)"):null!=K.D&&($d(a,K,la),"p"==w?a.Ja(a.u,K):"r"==w?a.Ja(a.aa,K):"w"==w?a.Ja(a.H,K):a.g("unknown breakpoint command: "+w))}}}break;case "c":a.ta&&(a.ta.value="");break;case "d":a:{var M,P=f[0],A=f[1],X=f[2],zf=f[3];if("?"==A){var xa="";for(M in Td)a.Fa[M]&&(xa&&(xa+=","),xa+=M);xa+=
+",state,symbols";a.g("dump memory commands:");a.g("\tdb [a] [#]    dump # bytes at address a");a.g("\tdw [a] [#]    dump # words at address a");a.g("\tdd [a] [#]    dump # dwords at address a");a.g("\tdh [#] [#]    dump # instructions from history");xa.length&&a.g("dump extension commands:\n\t"+xa)}else if("state"==A){var re=cf(a.w,!0);"console"==X?console.log(re):(a.ta&&(a.ta.value=""),a.g(re))}else if("symbols"==A)for(var Uc=0;Uc<a.J.length;Uc++){var Vc=a.J[Uc],ab;for(ab in Vc.Da)if("."!=ab.charAt(0)){var se=
+Vc.Da[ab].o;if(void 0!==se){var te=Vc.Da[ab].l;te&&(ab=te);a.g(Z(se)+" "+ab)}}}else{if("d"==P){for(M in Td)if(f[1]==M){var ue=a.Fa[M];ue?(f.shift(),f.shift(),ue(f)):a.g("no dump registered for "+A);break a}A||(P=a.fc||"db")}else a.fc=P;if("dh"==P){var ve=A,we=X,xe="",ye=0,U=a.ra,ya=a.W;if(ya.length){var Y=+ve||a.Nb,bb=+we||10;isNaN(Y)?Y=bb:xe="more ";Y>ya.length&&(a.g("note: only "+ya.length+" available"),Y=ya.length);U-=Y;0>U&&(null==ya[ya.length-1].D?(Y=U+Y,U=0):U+=ya.length);var Wc=[];"call"==
+we&&(bb=1E5,Wc=["CALL"]);for(void 0!==ve&&a.g(Y+" instructions earlier:");0<bb&&U!=a.ra;){var ze=ya[U++];if(null==ze.D)break;var Bb=T(ze.D),Af=Y--,Ae=oe(a,Bb,"history",Af);(!Wc.length||0<=Ae.indexOf(Wc[0]))&&a.g(Ae);Bb.wb&&(U+=Bb.wb,bb-=Bb.wb,Y-=Bb.wb);U>=ya.length&&(U=0);a.Nb=Y;ye++;bb--}}ye||(a.g("no "+xe+"history available"),a.Nb=void 0)}else{var dc=W(a,A);if(dc){var ec=0;X&&("l"==X.charAt(0)&&(X=X.substr(1)||zf),ec=Se(a,X)>>>0,65536<ec&&(ec=65536));for(var La="",fc="dd"==P?4:"dw"==P?2:1,gc=fc*
+ec||128,Bf=gc+15>>4||1;Bf--&&0<gc;){var hc=0,Xc=0,Cb,Db="",Yc="",A=Z(dc.D);for(Cb=16;0<Cb&&0<gc;Cb--){var ic=a.X(dc,1),hc=hc|ic<<(Xc++<<3);Xc==fc&&(Db+=q(hc,2*fc),Db+=1==fc?9==Cb?"-":" ":"  ",hc=Xc=0);Yc+=32<=ic&&128>ic?String.fromCharCode(ic):".";gc--}La&&(La+="\n");La+=A+"  "+Db+(0==Cb?" "+Yc:"")}La&&a.g(La);a.Gb=dc}}}}break;case "e":if("else"==f[0])break;var jc=1,Be=255,Ce=a.X,De=a.ga;"ew"==f[0]&&(jc=2,Be=65535,Ce=a.Ha,De=a.vb);var Ee=jc<<1,Fe=f[1];if(null==Fe)a.g("edit memory commands:"),a.g("\teb [a] [...]  edit bytes at address a"),
+a.g("\tew [a] [...]  edit words at address a");else{var kc=W(a,Fe);if(kc)for(var lc=2;lc<f.length;lc++){var Eb=Zd(a,f[lc]);if(void 0===Eb){a.g("unrecognized value: "+f[lc]);break}Eb&~Be&&a.g("warning: "+q(Eb)+" exceeds "+jc+"-byte value");var Cf=Ce.call(a,kc);a.g("changing "+Z(kc.D)+" from 0x"+q(Cf,Ee)+" to 0x"+q(Eb,Ee));De.call(a,kc,Eb,jc)}}break;case "f":Xe(a,f[1]);break;case "g":a:{var Ge=f[1],Df=b;if(void 0!==Ge){var Zc=W(a,Ge,!0);if(!Zc)break a;$d(a,Zc,Df);a.Ja(a.u,Zc,!0)}a.Oa(!0)||c||a.g("cpu busy or unavailable, run command ignored")}break;
+case "h":a:{var $c;if(a.A.ma)$c="halting",a.da();else{if(hb(a,!0))break a;$c="already halted"}c||a.g($c)}break;case "i":if("if"==f[0]){var ad;var Fb=b.substr(2),Fb=ia(Fb);Zd(a,Fb)?(c||a.g("true: "+Fb),ad=!0):(c||a.g("false: "+Fb),ad=!1);ad||(d=!1);break}var bd=f[1];if(bd&&"?"!=bd){var cd=Se(a,bd);if(void 0!==cd){var Ef=yb(a.B,cd);a.g(r(cd)+": "+("0x"+q(Ef,2)))}}else a.g("input commands:"),a.g("\ti [p]\tread port [p]"),a.g("warning: port accesses can affect hardware state");break;case "k":var Ff=f[0];
+if("?"==f[1])a.g("stack trace commands:"),a.g("\tk\tshow frame addresses"),a.g("\tks\tshow symbol information");else{var dd=0,He=T(),Gb=T(a.b.ca);for(a.g("stack trace for "+Z(Gb.D));10>dd;){for(var Ma=null,Gf=256;65536>Gb.D>>>0;){He.D=a.Ha(Gb,2);if(null==Gb.D||!Gf--)break;for(var Hf=a,mc=He,Ie=null,Hb=mc.D,Je=Hb,ed=1;6>=ed&&Hb;ed++){if(2<ed){mc.D=Hb;var nc=oe(Hf,mc);if(0<=nc.indexOf("CALL")){var Ke=nc.indexOf(" ");if(Hb+(nc.indexOf(" ",Ke+1)-Ke-1)/2==Je){Ie=nc;break}}}Hb--}mc.D=Je;if(Ma=Ie)break}if(!Ma||
+null==Ma)break;var Le=null;if("ks"==Ff){var Me=Ma.match(/[0-9A-F]+$/);Me&&(Le=Ze(a,Me[0]))}Ma=ha(Ma,50)+"  ;"+(Le||"stack="+Z(Gb.D));a.g(Ma);dd++}dd||a.g("no return addresses found")}break;case "l":if("ln"==f[0]){Ze(a,f[1],!0);break}break;case "m":a:{var za,Aa=null,G=f[1];"?"==G&&(G=void 0);if(void 0!==G){var Na=0;if("all"==G)Na=1610481663,G=null;else if("on"==G)Aa=!0,G=null;else if("off"==G)Aa=!1,G=null;else{"keys"==G&&(G="key");"kbd"==G&&(G="keyboard");for(za in Td)if(G==za){Na=Td[za];Aa=!!(a.ja&
 Na);break}if(!Na){a.g("unknown message category: "+G);break a}}Na&&("on"==f[2]?(a.ja|=Na,Aa=!0):"off"==f[2]&&(a.ja&=~Na,Aa=!1))}var If=0,Ha="";for(za in Td)if(!G||G==za){var Jf=!!(a.ja&Td[za]);if(null===Aa||Aa==Jf)Ha&&(Ha+=","),++If%10||(Ha+="\n\t"),"key"==za&&(za="keys"),Ha+=za}void 0===G&&a.g("message commands:\n\tm [category] [on|off]\tturn categories on/off");a.g((null!==Aa?Aa?"messages on:  ":"messages off: ":"message categories:\n\t")+(Ha||"none"));Md(a)}break;case "o":var fd=f[1],Kf=f[2];if(fd&&
 "?"!=fd){var gd=Se(a,fd,"port #"),hd=Se(a,Kf);void 0!==gd&&void 0!==hd&&(Jb(a.B,gd,hd),a.g(r(gd)+": "+("0x"+q(hd,2))))}else a.g("output commands:"),a.g("\to [p] [b]\twrite byte [b] to port [p]"),a.g("warning: port accesses can affect hardware state");break;case "p":if("print"==f[0]){af(a,b.substr(5));break}var Ne="pr"==f[0]?1:0,Lf=1+Ne;if(a.ba)a.g("step in progress");else{var id=T(a.b.M);switch(a.X(id)){case 205:a.ba=Lf,Vd(id,3)}a.ba?(a.Ja(a.u,id,!0),a.Oa()||(a.w&&a.w.mb(),a.ba=0)):bf(a,Ne?"tr":"t")}break;
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-m.pa=function(a,b,c){var d=this;switch(b){case "power":return this.T[b]=c,c.onclick=function(){d.C||(d.A.ka?cf(d,!1,!0):tf(d,d.kb))},!0;case "reset":return this.T[b]=c,c.onclick=function(){if(d.A.ka&&!d.C)if(d.w&&!d.L){var a=ra("Click OK to save changes to this "+of+" machine.\n\nWARNING: If you CANCEL, all disk changes will be discarded.");cf(d,a,!0);!a&&d.fa?window&&window.location.reload():d.kb(mf)}else d.reset(),d.b&&sc(d.b)},!0;case "save":if(ea(pa(),"pcjs.org")){c.parentNode.removeChild(c);
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diff --git a/versions/pc8080/1.22.0/pc8080.js b/versions/pc8080/1.22.0/pc8080.js
index e9e4d821e..06d7b2aaf 100644
--- a/versions/pc8080/1.22.0/pc8080.js
+++ b/versions/pc8080/1.22.0/pc8080.js
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