From 427e6afdb8fad864053b29f17191be29ef13c512 Mon Sep 17 00:00:00 2001
From: Jeff <Jeff@pcjs.org>
Date: Tue, 4 Apr 2017 11:26:49 -0700
Subject: [PATCH] Fixed OPDEF opcode generation (improper use of bitwise
 operators)

---
 modules/pdp10/lib/debugger.js      |  13 +-
 modules/pdp10/lib/macro10.js       |   7 +-
 versions/pdpjs/1.34.3/pdp10-dbg.js | 192 ++++++++++++++---------------
 3 files changed, 112 insertions(+), 100 deletions(-)

diff --git a/modules/pdp10/lib/debugger.js b/modules/pdp10/lib/debugger.js
index ad2af38f7..737946e29 100644
--- a/modules/pdp10/lib/debugger.js
+++ b/modules/pdp10/lib/debugger.js
@@ -963,6 +963,9 @@ class DebuggerPDP10 extends Debugger {
         case DebuggerPDP10.REGS.C1:
             value = (cpu.regPS & PDP10.PSFLAG.CRY1)? 1 : 0;
             break;
+        case DebuggerPDP10.REGS.BI:
+            value = (cpu.regPS & PDP10.PSFLAG.BIS)? 1 : 0;
+            break;
         case DebuggerPDP10.REGS.ND:
             value = (cpu.regPS & PDP10.PSFLAG.DCK)? 1 : 0;
             break;
@@ -1002,6 +1005,9 @@ class DebuggerPDP10 extends Debugger {
         case DebuggerPDP10.REGS.C1:
             flag = PDP10.PSFLAG.CRY1;
             break;
+        case DebuggerPDP10.REGS.BI:
+            flag = PDP10.PSFLAG.BIS;
+            break;
         case DebuggerPDP10.REGS.ND:
             flag = PDP10.PSFLAG.DCK;
             break;
@@ -4147,12 +4153,13 @@ if (DEBUGGER) {
         OV:     4,                              // single-bit "register" representing the Overflow flag
         C0:     5,                              // single-bit "register" representing the Carry 0 flag
         C1:     6,                              // single-bit "register" representing the Carry 1 flag
-        ND:     7,                              // single-bit "register" representing the No Divide flag
-        PD:     8,                              // single-bit "register" representing the Pushdown Overflow flag
+        BI:     7,                              // single-bit "register" representing the Byte Interrupt flag
+        ND:     8,                              // single-bit "register" representing the No Divide flag
+        PD:     9,                              // single-bit "register" representing the Pushdown Overflow flag
     };
 
     DebuggerPDP10.REGNAMES = [
-        "PC", "RA", "EA", "PS", "OV", "C0", "C1", "ND", "PD"
+        "PC", "RA", "EA", "PS", "OV", "C0", "C1", "BI", "ND", "PD"
     ];
 
     /*
diff --git a/modules/pdp10/lib/macro10.js b/modules/pdp10/lib/macro10.js
index 2f5563ce8..089c8b85a 100644
--- a/modules/pdp10/lib/macro10.js
+++ b/modules/pdp10/lib/macro10.js
@@ -815,7 +815,12 @@ class Macro10 {
                     this.popScope();
                     if (w !== undefined) {
                         this.aWords[nLocation] += (w & (PDP10.OPCODE.A_FIELD | PDP10.OPCODE.X_FIELD | PDP10.OPCODE.Y_FIELD));
-                        this.aWords[nLocation] |= (w & PDP10.OPCODE.I_FIELD);
+                        /*
+                         * We can't "OR" (|=) the I_FIELD bit into the target word, because it's a 36-bit value and bitwise
+                         * operators truncate to 32 bits, so we'll use addition, trusting that the field was initially zero.
+                         */
+                        this.dbg.assert(!(this.aWords[nLocation] & PDP10.OPCODE.I_FIELD));
+                        this.aWords[nLocation] += (w & PDP10.OPCODE.I_FIELD);
                         if (sFixup) {
                             if (!this.aFixups[nLocation]) {
                                 this.aFixups[nLocation] = sFixup;
diff --git a/versions/pdpjs/1.34.3/pdp10-dbg.js b/versions/pdpjs/1.34.3/pdp10-dbg.js
index 4c9c046b2..f2e02bbd9 100644
--- a/versions/pdpjs/1.34.3/pdp10-dbg.js
+++ b/versions/pdpjs/1.34.3/pdp10-dbg.js
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-k[0]){Fg(a,b.substr(5));break}var xg=k[0],yg="p"==xg?0:"pr"==xg?1:-1;if("?"==k[1]||0>yg)a.u("step commands:"),a.u("\tp\tstep over instruction"),a.u("\tpr\tstep over instruction with register update");else if(a.O)a.u("step in progress");else{var zg=Y(a.v.i);a.Na(zg);a.O?(a.Ra(a.i,zg,!0),Cf(a)||(a.H&&ld(a.H),a.O=0)):Gg(a,yg?"tr":"t")}break;case "r":if("reset"==b){a.H&&a.H.reset();break}Ff(a,k);break;case "s":a:switch(k[1]){case "base":if(k[2]){var ob=+k[2];if(2==ob||8==ob||10==ob||16==ob)a.U=ob;else{a.u("invalid base: "+
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+function Ie(a,b,c,d,e){var f=[],g;for(g in e){var h=e[g];"number"==typeof h&&(e[g]=h={o:h});var k=h.o,l=h.a;if(void 0!==k){var p=f,k=[k>>>0,g],q=Ha(p,k,a.Gb);0>q&&p.splice(-(q+1),0,k)}l&&(h.a=l.replace(/''/g,'"'))}a.I.push({yd:b,B:c,Wb:d,aa:e,Bb:f})}function Xf(a,b,c){var d=[],e=hf(b)>>>0;for(b=0;b<a.I.length;b++){var f=a.I[b],g=f.B>>>0,h=f.Wb;if(e>=g&&e<g+h){e=Ha(f.Bb,[e-g],a.Gb);0<=e?Yf(a,b,e,d):c&&(e=~e,Yf(a,b,e-1,d),Yf(a,b,e,d));break}}return d}
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