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

@@ -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
+ * PS "arithmetic" flags are NOT stored in regPS; they are maintained across separate result registers,
- * separate result registers, hence the "indirect" designation.
+ * 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);
 

modules/pc8080/lib/cpuops.js

@@ -2703,9 +2703,7 @@ CPUDef.opRP = function()
  */
 CPUDef.opPOPSW = function()
 {
-    var w = this.popWord();
+    this.setPSW(this.popWord());
-    this.setPS(w);
-    this.regA = w >> 8;
     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;
 };
 

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";
+     * 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.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;
+    this.regPS = (this.regPS & ~(CPUDef.PS.RESULT | CPUDef.PS.INTERNAL)) | (regPS & CPUDef.PS.INTERNAL) | CPUDef.PS.SET;
-    Component.assert((regPS & CPUDef.PS.INDIRECT) == (this.getPS() & CPUDef.PS.INDIRECT));
+    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;
 };
 
 /**

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));
+            i = usr.indexOf(Debugger.REGS, sReg.substr(off, 2));
-            if (i < 0) 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("IF") + this.getFlagOutput("SF") + this.getFlagOutput("ZF") +
-            this.getFlagOutput('A') + this.getFlagOutput('P') + this.getFlagOutput('C');
+            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:

versions/pc8080/1.22.0/pc8080-dbg.js

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+function S(a){v.call(this,"ChipSet",a,S,32768);var b=a.model;b&&!vd[b]&&t("Unrecognized ChipSet model: "+b);this.Ua=vd[b]||wd;a.sound&&(this.W=null,window&&(this.W=window.AudioContext||window.webkitAudioContext),this.W&&new this.W);D(this)}Va(S);var wd=1978.1,vd={SI1978:wd};m=S.prototype;m.qa=function(){return!1};
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