diff --git a/modules/pc8080/lib/cpuops.js b/modules/pc8080/lib/cpuops.js index 822845101..cd56061a5 100644 --- a/modules/pc8080/lib/cpuops.js +++ b/modules/pc8080/lib/cpuops.js @@ -1287,11 +1287,6 @@ CPUDef8080.opMOVML = function() */ CPUDef8080.opHLT = function() { - /* - * The CPU is never REALLY halted by a HLT instruction; instead, by setting X86.INTFLAG.HALT, - * we are signalling to stepCPU() that it's free to end the current burst AND that it should not - * execute any more instructions until checkINTR() indicates a hardware interrupt is requested. - */ var addr = this.getPC() - 1; /* @@ -1304,9 +1299,15 @@ CPUDef8080.opHLT = function() } } - this.intFlags |= CPUDef8080.INTFLAG.HALT; this.nStepCycles -= 7; + /* + * The CPU is never REALLY halted by a HLT instruction; instead, we call requestHALT(), which + * signals to stepCPU() that it should end the current burst AND that it should not execute any + * more instructions until checkINTR() indicates a hardware interrupt has been requested. + */ + this.requestHALT(); + /* * If a Debugger is present and the HALT message category is enabled, then we REALLY halt the CPU, * on the theory that whoever's using the Debugger would like to see HLTs. @@ -2823,8 +2824,9 @@ CPUDef8080.opJM = function() */ CPUDef8080.opEI = function() { - this.setIF();var w = this.getHL(); + this.setIF(); this.nStepCycles -= 4; + this.checkINTR(); }; /** diff --git a/modules/pc8080/lib/cpustate.js b/modules/pc8080/lib/cpustate.js index c842fa6c1..2479325ac 100644 --- a/modules/pc8080/lib/cpustate.js +++ b/modules/pc8080/lib/cpustate.js @@ -934,21 +934,38 @@ CPUState8080.prototype.pushWord = function(w) * checkINTR() * * @this {CPUState8080} - * @return {boolean} true if h/w interrupt has just been acknowledged, false if not + * @return {boolean} true if execution may proceed, false if not */ CPUState8080.prototype.checkINTR = function() { - if ((this.intFlags & CPUDef8080.INTFLAG.INTR) && this.getIF()) { - for (var nLevel = 0; nLevel < 8; nLevel++) { - if (this.intFlags & (1 << nLevel)) break; + /* + * If the Debugger is single-stepping, this.nStepCycles will always be zero, which we take + * advantage of here to avoid processing interrupts. The Debugger will have to issue a "g" + * command (or "p" command on a call instruction) if you want interrupts to be processed. + */ + if (this.nStepCycles) { + if ((this.intFlags & CPUDef8080.INTFLAG.INTR) && this.getIF()) { + for (var nLevel = 0; nLevel < 8; nLevel++) { + if (this.intFlags & (1 << nLevel)) break; + } + this.clearINTR(nLevel); + this.clearIF(); + this.intFlags &= ~CPUDef8080.INTFLAG.HALT; + this.aOps[CPUDef8080.OPCODE.RST0 | (nLevel << 3)].call(this); } - this.clearINTR(nLevel); - this.clearIF(); - this.intFlags &= ~CPUDef8080.INTFLAG.HALT; - this.aOps[CPUDef8080.OPCODE.RST0 | (nLevel << 3)].call(this); - return true; } - return false; + if (this.intFlags & CPUDef8080.INTFLAG.HALT) { + /* + * As discussed in opHLT(), the CPU is never REALLY halted by a HLT instruction; instead, opHLT() + * calls requestHALT(), which sets INTFLAG.HALT and signals to stepCPU() that it's free to end the + * current burst AND that it should not execute any more instructions until checkINTR() indicates + * that a hardware interrupt has been requested. + */ + this.nBurstCycles -= this.nStepCycles; + this.nStepCycles = 0; + return false; + } + return true; }; /** @@ -968,14 +985,28 @@ CPUState8080.prototype.clearINTR = function(nLevel) this.intFlags &= ~bitsClear; }; + +/** + * requestHALT() + * + * @this {CPUState8080} + */ +CPUState8080.prototype.requestHALT = function() +{ + this.intFlags |= CPUDef8080.INTFLAG.HALT; + this.nBurstCycles -= this.nStepCycles; + this.nStepCycles = 0; +}; + /** * requestINTR(nLevel) * * Request the corresponding interrupt level. * - * Each interrupt level (0-7) has its own intFlags bit (0-7). If one or more of those bits are set, - * and the Interrupt Flag (IF) is also set, indicating that interrupts are enabled, then checkINTR() - * chooses one of those bits, clears it, clears IF, and executes the corresponding RST opcode. + * Each interrupt level (0-7) has its own intFlags bit (0-7). If the Interrupt Flag (IF) is also + * set, then we know that checkINTR() will want to issue the interrupt, so we end the current burst + * by setting nStepCycles to zero. But before we do, we subtract nStepCycles from nBurstCycles, + * so that the calculation of how many cycles were actually executed on this burst is correct. * * @this {CPUState8080} * @param {number} nLevel (0-7) @@ -983,6 +1014,10 @@ CPUState8080.prototype.clearINTR = function(nLevel) CPUState8080.prototype.requestINTR = function(nLevel) { this.intFlags |= (1 << nLevel); + if (this.getIF()) { + this.nBurstCycles -= this.nStepCycles; + this.nStepCycles = 0; + } }; /** @@ -1099,63 +1134,22 @@ CPUState8080.prototype.stepCPU = function(nMinCycles) */ this.nBurstCycles = this.nStepCycles = nMinCycles; - do { - if (this.intFlags) { - /* - * We no longer call checkINTR() if the Debugger is single-stepping; you'll have to let the - * CPU run with a "g" (or a "p" on a call instruction) if you want interrupts to be processed. - */ - if (nMinCycles) { - /* - * NOTE: If checkINTR() returns true, it also clears INTFLAG.HALT, so we don't have to worry - * about the INTFLAG.HALT code below triggering. - */ - this.checkINTR(); - /* - * If the Debugger is running, consider some new notification mechanism(s) regarding interrupt - * dispatches; the following code no longer applies, due to changes above. - * - * if (!nMinCycles && this.checkINTR()) { - * this.assert(DEBUGGER); // nMinCycles of zero should be generated ONLY by the Debugger - * if (DEBUGGER) { - * this.println("interrupt dispatched"); - * break; - * } - * } - */ + /* + * NOTE: If checkINTR() returns false, INTFLAG.HALT must be set, so no instructions should be executed. + */ + if (this.checkINTR()) { + do { + if (DEBUGGER && fDebugCheck) { + if (this.dbg.checkInstruction(this.regPC, nDebugState)) { + this.stopCPU(); + break; + } + nDebugState = 1; } - if (this.intFlags & CPUDef8080.INTFLAG.HALT) { - /* - * As discussed in opHLT(), the CPU is never REALLY halted by a HLT instruction; instead, - * opHLT() sets CPUDef8080.INTFLAG.HALT, signalling to us that we're free to end the current burst - * AND that we should not execute any more instructions until checkINTR() indicates a hardware - * interrupt has been requested. - * - * One downside to this approach is that it *might* appear to the careful observer that we - * executed a full complement of instructions during bursts where CPUDef8080.INTFLAG.HALT was set, - * when in fact we did not. However, the steady advance of the overall cycle count, and thus - * the steady series calls to stepCPU(), is needed to ensure that timer updates, video updates, - * etc, all continue to occur at the expected rates. - * - * If necessary, we can add another bookkeeping cycle counter (eg, one that keeps tracks of the - * number of cycles during which we did not actually execute any instructions). - */ - this.nStepCycles = 0; - break; - } - } + this.aOps[this.getPCByte()].call(this); - if (DEBUGGER && fDebugCheck) { - if (this.dbg.checkInstruction(this.regPC, nDebugState)) { - this.stopCPU(); - break; - } - nDebugState = 1; - } - - this.aOps[this.getPCByte()].call(this); - - } while (this.nStepCycles > 0); + } while (this.nStepCycles > 0); + } return (this.flags.fComplete? this.nBurstCycles - this.nStepCycles : (this.flags.fComplete === undefined? 0 : -1)); }; diff --git a/versions/pc8080/1.24.1/pc8080-dbg.js b/versions/pc8080/1.24.1/pc8080-dbg.js index 1e3e062cd..afad764d9 100644 --- a/versions/pc8080/1.24.1/pc8080-dbg.js +++ b/versions/pc8080/1.24.1/pc8080-dbg.js @@ -9,241 +9,240 @@ function ta(){return window?window.navigator.userAgent:""}function u(a){window&& function ya(a){var b;if(window)try{b=window.localStorage.getItem(a)}catch(c){}return b}function za(a,b){try{return window.localStorage.setItem(a,b),!0}catch(c){}return!1}function Aa(a){if(window){var b=ta();return"iOS"==a&&b.match(/(iPod|iPhone|iPad)/)&&b.match(/AppleWebKit/)||"MSIE"==a&&b.match(/(MSIE|Trident)/)||0<=b.indexOf(a)?!0:!1}return!1}function Ba(a,b,c){function d(){--a;0<=a&&(b()||(a=0));0b?this.Za=this.id:(this.Mb=this.id.substr(0,b),this.Za=this.id.substr(b+1));this[a]=c;this.D={Ma:!1,lb:!1,Wb:!1,ua:!1,nb:!1};this.Pb=null;this.D.nb=!1;this.N={};this.I=null;this.ra=d||0;Ta.push(this)}var Ua=void 0,Va={}; 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+m.save=function(){var a=new H(this);switch(this.A.za){case T.za:I(a,0,[this.Ba,this.H,this.Ca,this.aa,this.fa,this.ua,this.ya]);break;case U.za:I(a,0,[this.ha,this.L]),I(a,1,[this.M,this.O]),I(a,2,[this.J,this.ca,this.qa,this.pa]),I(a,3,[this.S,this.u,this.R,this.da,this.F])}return a.data()}; +m.restore=function(a){var b;if(a&&(b=a[0])&&b.length)switch(this.A.za){case T.za:return this.Ba=b[0],this.H=b[1],this.Ca=b[2],this.aa=b[3],this.fa=b[4],this.ua=b[5],this.ya=b[6],!0;case U.za:return this.ha=b[0],this.L=b[1],b=a[1],this.M=b[0],this.O=b[1],b=a[2],this.J=b[0],this.ca=b[1],this.qa=b[2],this.pa=b[3],b=a[3],this.S=b[0],this.u=b[1],this.R=b[2],this.da=b[3],this.F=b[4],!0}return!1};m.start=function(){};m.stop=function(){};m.Ad=function(a,b){var c=this.Ba;D(this,a,null,b,"STATUS0",c,!0);return c}; +m.Bd=function(a,b){var c=this.H;D(this,a,null,b,"STATUS1",c,!0);return c};m.Cd=function(a,b){var c=this.Ca;D(this,a,null,b,"STATUS2",c,!0);return c};m.zd=function(a,b){var c=this.aa>>8-this.fa&255;D(this,a,null,b,"SHIFT.RESULT",c,!0);return c};m.Kd=function(a,b,c){D(this,a,b,c,"SHIFT.COUNT",null,!0);this.fa=b};m.Md=function(a,b,c){D(this,a,b,c,"SOUND1",null,!0);this.ua=b};m.Ld=function(a,b,c){D(this,a,b,c,"SHIFT.DATA",null,!0);this.aa=b<<8|this.aa>>8}; +m.Nd=function(a,b,c){D(this,a,b,c,"SOUND2",null,!0);this.ya=b};m.Od=function(a,b,c){D(this,a,b,c,"WATCHDOG",null,!0)};function Pd(a){var b=0,c=0,d=~a.S;for(a=0;10>a;a++)d&1&&(b=9-a),d>>=1;for(a=0;10>a;a++)d&1&&(c=9-a),d>>=1;return 10*b+c} +m.Dd=function(a,b){var c=this.L,c=c&~U.Ja.nc;if((Gc(this.b)&64)<<1&&(c|=U.Ja.nc,c!=this.L)){var d,e;d=this.R&1;e=this.R>>1&7;switch(e){case U.Ka.Va.pd:break;case U.Ka.Va.Oc:this.S=this.S<<1|d;break;case U.Ka.Va.Tc:d=Pd(this);this.F[d]=U.Ka.Lb;jb(this,"doNVRCommand(): erase data at addr "+t(d));break;case U.Ka.Va.Pc:this.u=this.u<<1|d;break;case U.Ka.Va.td:d=Pd(this);e=this.u&U.Ka.Lb;this.F[d]=e;jb(this,"doNVRCommand(): write data "+t(e)+" to addr "+t(d));break;case U.Ka.Va.nd:d=Pd(this);e=this.F[d]; null==e&&(e=U.Ka.Lb);this.u=e;jb(this,"doNVRCommand(): read data "+t(e)+" from addr "+t(d));break;case U.Ka.Va.od:this.u<<=1;this.da=this.u&U.Ka.Lb+1;break;default:jb(this,"doNVRCommand(): unrecognized command "+da(e))}}c&=~U.Ja.oc;this.da&&(c|=U.Ja.oc);c&=~U.Ja.jc;if(d=this.K)d=this.K,d.F&&Gc(d.b)>=d.L+3520&&(d.F=!1),d=!d.F;d&&(c|=U.Ja.jc);c&=~U.Ja.qc;this.Na&&this.Na.Da&1&&(c|=U.Ja.qc);this.L=c;D(this,a,null,b,"FLAGS",c);return c};m.Pd=function(a,b,c){D(this,a,b,c,"BRIGHTNESS");this.ha=b}; -m.Sd=function(a,b,c){D(this,a,b,c,"NVR.LATCH");this.R=b};m.Rd=function(a,b,c){D(this,a,b,c,"DC012");a=b&3;switch(b>>2&3){case 0:this.J=this.J&-4|a;break;case 1:this.J=this.J&-13|a<<2;this.video&&(b=this.video,a=this.J,jb(b,"updateScrollOffset("+a+")"),b.ib!==a&&((b.ib=a)?Pd(b,-1):b.yb=!0));break;case 2:switch(a){case 0:this.ca=~this.ca;break;case 2:case 3:this.qa=3-a}break;case 3:this.pa=a}}; -m.Qd=function(a,b,c){D(this,a,b,c,"DC011");b&U.Wa.md?(b&=U.Wa.pc,this.O!=b&&(this.O=b,this.video&&(a=this.video,b=this.O==U.Wa.pc?50:60,jb(a,"updateRate("+b+")"),a.Zb=b))):(b&=U.Wa.ic,this.M!=b&&(this.M=b,this.video&&(a=this.M==U.Wa.ic?132:80,b=this.video,jb(b,"updateDimensions("+a+","+(80>2&3){case 0:this.J=this.J&-4|a;break;case 1:this.J=this.J&-13|a<<2;this.video&&(b=this.video,a=this.J,jb(b,"updateScrollOffset("+a+")"),b.ib!==a&&((b.ib=a)?Qd(b,-1):b.yb=!0));break;case 2:switch(a){case 0:this.ca=~this.ca;break;case 2:case 3:this.qa=3-a}break;case 3:this.pa=a}}; +m.Qd=function(a,b,c){D(this,a,b,c,"DC011");b&U.Wa.md?(b&=U.Wa.pc,this.O!=b&&(this.O=b,this.video&&(a=this.video,b=this.O==U.Wa.pc?50:60,jb(a,"updateRate("+b+")"),a.Zb=b))):(b&=U.Wa.ic,this.M!=b&&(this.M=b,this.video&&(a=this.M==U.Wa.ic?132:80,b=this.video,jb(b,"updateDimensions("+a+","+(80>>0,h],q=oa(p,k,a.Ua);0>q&&p.splice(-(q+1),0,k)}l&&(g.a=l.replace(/''/g,'"'))}a.H.push({Je:b,G:c,Fd:d,Ra:e,rc:f})}delete this.Ra}return!0};Sd.prototype.Ha=function(){return!0}; -function Td(a,b,c,d){if(d)a.ia("Unable to load system ROM (error "+d+": "+b+")");else{db(a.Mb,b,c);if("["==c.charAt(0)||"{"==c.charAt(0))try{var e=eval("("+c+")"),f=e.bytes,h=e.data;if(f)a.A=f;else if(h)for(a.A=Array(4*h.length),d=c=0;c>8&255,a.A[d++]=h[c]>>16&255,a.A[d++]=h[c]>>24&255;else a.A=e;a.Ra=e.symbols;if(!a.A.length){u("Empty ROM: "+b);return}if(1==a.A.length){u(a.A[0]);return}}catch(g){a.ia("ROM data error: "+g.message);return}else for(b=c.replace(/\n/gm, -" ").replace(/ +$/,"").split(" "),a.A=Array(b.length),e=0;e>>f.oa;0>>=f.oa;0>>0,h],q=oa(p,k,a.Ua);0>q&&p.splice(-(q+1),0,k)}l&&(g.a=l.replace(/''/g,'"'))}a.H.push({Je:b,G:c,Fd:d,Ra:e,rc:f})}delete this.Ra}return!0};Td.prototype.Ha=function(){return!0}; +function Ud(a,b,c,d){if(d)a.ia("Unable to load system ROM (error "+d+": "+b+")");else{db(a.Mb,b,c);if("["==c.charAt(0)||"{"==c.charAt(0))try{var e=eval("("+c+")"),f=e.bytes,h=e.data;if(f)a.B=f;else if(h)for(a.B=Array(4*h.length),d=c=0;c>8&255,a.B[d++]=h[c]>>16&255,a.B[d++]=h[c]>>24&255;else a.B=e;a.Ra=e.symbols;if(!a.B.length){u("Empty ROM: "+b);return}if(1==a.B.length){u(a.B[0]);return}}catch(g){a.ia("ROM data error: "+g.message);return}else for(b=c.replace(/\n/gm, +" ").replace(/ +$/,"").split(" "),a.B=Array(b.length),e=0;e>>f.oa;0>>=f.oa;0d?a.u.push({fc:b,ac:Date.now(),Nb:!1}):(a.u[d].ac=Date.now(),a.u[d].Nb=!1);else if(0<=d){if(!a.u[d].Nb){var e=a.u[d].ac;if(e&&100>Date.now()-e)return a.u[d].Nb=!0,ee(a),!0}a.u.splice(d,1)}if(a.J){d=0;switch(b){case "1p":d=T.Ya.gd;break;case "2p":d=T.Ya.ld;break;case "coin":d=T.Ya.Sc;break;case "left":d=T.Ya.jd;break;case "right":d=T.Ya.kd;break;case "fire":d=T.Ya.hd}d&&(a=a.J,b=d,a.H&=~b,c&&(a.H|=b))}return!0} -function ee(a){for(var b=0,c=-1;bc||c>e)c=e}else{ce(a,d,!1);b=0;continue}}b++}0<=c&&setTimeout(function(){ee(a)},c)}m.Ed=function(a,b){var c=this.H;0<=this.B&&(this.B>3)*a.ca,!zb(a.w,a.ta,a.S,3)))return!1;a.S?(a.Ic=a.F.createImageData(b,c),a.Kc=16/a.ab|0,ke(a,a.S>>1)):ke(a,(a.da+1)*a.ga);a.M=document.createElement("canvas");a.M.width=b;a.M.height=c;a.jb=a.M.getContext("2d");a.pa={};a.Ca=1<=a.zc?8:16,f=8>(7d?a.u.push({fc:b,ac:Date.now(),Nb:!1}):(a.u[d].ac=Date.now(),a.u[d].Nb=!1);else if(0<=d){if(!a.u[d].Nb){var e=a.u[d].ac;if(e&&100>Date.now()-e)return a.u[d].Nb=!0,fe(a),!0}a.u.splice(d,1)}if(a.J){d=0;switch(b){case "1p":d=T.Ya.gd;break;case "2p":d=T.Ya.ld;break;case "coin":d=T.Ya.Sc;break;case "left":d=T.Ya.jd;break;case "right":d=T.Ya.kd;break;case "fire":d=T.Ya.hd}d&&(a=a.J,b=d,a.H&=~b,c&&(a.H|=b))}return!0} +function fe(a){for(var b=0,c=-1;bc||c>e)c=e}else{de(a,d,!1);b=0;continue}}b++}0<=c&&setTimeout(function(){fe(a)},c)}m.Ed=function(a,b){var c=this.H;0<=this.A&&(this.A>3)*a.ca,!zb(a.w,a.ua,a.S,3)))return!1;a.S?(a.Ic=a.F.createImageData(b,c),a.Kc=16/a.ab|0,le(a,a.S>>1)):le(a,(a.da+1)*a.ga);a.M=document.createElement("canvas");a.M.width=b;a.M.height=c;a.jb=a.M.getContext("2d");a.pa={};a.Ca=1<=a.zc?8:16,f=8>(7>4)*c)}return k} -fe.prototype.Ea=function(){if(2==this.fa){for(var a={0:[32,"SET-UP A"],2:[64,'TO EXIT PRESS "SET-UP"'],22:[96," T T T T T T T T T"],23:[96,"1234567890","1234567890","1234567890","1234567890","1234567890","1234567890","1234567890","1234567890"],24:[]},b=this.ta,c=-1,d=-1,e,f=-(60==this.Zb?2:5);f>8&15|16;Eb(this.w,b++,e);Eb(this.w,b++, -c&255);if(g)break}if(h)for(c=0,e=1;ec&&(a=Math.round(c/b*100)+"%")}this.Hc?(this.O.style.width=a,this.O.style.width=a,this.O.style.display="block",this.O.style.margin="auto"):(this.u.style.width=a,this.u.style.height="auto");this.u.style.backgroundColor="black";this.u.kb();a=!0}this.Ba&&this.Ba.focus()}return a}; -function ie(a,b){!b&&a.u&&(a.Hc?a.O.style.width=a.O.style.height="":a.u.style.width=a.u.style.height="");jb(a,"notifyFullScreen("+b+")")}function ke(a,b){a.Jc=b;a.ya=!1;if(void 0===a.H||a.H.length!=a.Jc)a.H=Array(a.Jc)}function me(a,b,c,d,e){d=a.B?(b.height-c-1)*b.width+d:c+d*b.width;e&&1==a.fa&&(208<=c&&236>c?e=a.Ca+0:28<=c&&72>c&&(e=a.Ca+1));a=a.qa[e];d*=a.length;b.data[d]=a[0];b.data[d+1]=a[1];b.data[d+2]=a[2];b.data[d+3]=a[3]} -function ne(a,b){for(var c=a.ta,d=-1,e=0,f=60==a.Zb?2:5,h=0,g=0,k=-1;e>=1);;){var v=Cb(a.w,p++);if(127==(v&127)){var r=Cb(a.w,p++),d=r&96,c=(r&15)<<8|Cb(a.w,p),c=c+(r&16?8192:16384);break}if(l>4)*v.ja,A=void 0,Q=void 0, +ge.prototype.Ea=function(){if(2==this.fa){for(var a={0:[32,"SET-UP A"],2:[64,'TO EXIT PRESS "SET-UP"'],22:[96," T T T T T T T T T"],23:[96,"1234567890","1234567890","1234567890","1234567890","1234567890","1234567890","1234567890","1234567890"],24:[]},b=this.ua,c=-1,d=-1,e,f=-(60==this.Zb?2:5);f>8&15|16;Eb(this.w,b++,e);Eb(this.w,b++, +c&255);if(g)break}if(h)for(c=0,e=1;ec&&(a=Math.round(c/b*100)+"%")}this.Hc?(this.O.style.width=a,this.O.style.width=a,this.O.style.display="block",this.O.style.margin="auto"):(this.u.style.width=a,this.u.style.height="auto");this.u.style.backgroundColor="black";this.u.kb();a=!0}this.Ba&&this.Ba.focus()}return a}; 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