diff --git a/devices/pc/video/ibm/cga/ibm-cga-dual.xml b/devices/pc/video/ibm/cga/ibm-cga-dual.xml
index 3db4e8fb5..57c4c2d13 100644
--- a/devices/pc/video/ibm/cga/ibm-cga-dual.xml
+++ b/devices/pc/video/ibm/cga/ibm-cga-dual.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<video id="videoCGA" model="cga" screenwidth="960" screenheight="480" scale="true" charset="/devices/pc/video/ibm/cga/ibm-cga.json" pos="center" padding="8px">
+<video id="videoCGA" model="cga" screenwidth="960" screenheight="600" scale="true" charset="/devices/pc/video/ibm/cga/ibm-cga.json" pos="center" padding="8px">
 	<menu>
 		<title>Color Display</title>
 	</menu>
diff --git a/devices/pc/video/ibm/cga/ibm-cga-keygrid.xml b/devices/pc/video/ibm/cga/ibm-cga-keygrid.xml
index a3bb53d9e..c3bf2be61 100644
--- a/devices/pc/video/ibm/cga/ibm-cga-keygrid.xml
+++ b/devices/pc/video/ibm/cga/ibm-cga-keygrid.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<video id="videoCGA" screenwidth="960" screenheight="480" scale="true" charset="/devices/pc/video/ibm/cga/ibm-cga.json" touchscreen="keygrid" pos="center" padding="8px">
+<video id="videoCGA" screenwidth="1280" screenheight="800" scale="true" charset="/devices/pc/video/ibm/cga/ibm-cga.json" touchscreen="keygrid" pos="center" padding="8px">
 	<menu>
 		<title>Color Display</title>
 		<control type="container" pos="right">
diff --git a/devices/pc/video/ibm/cga/ibm-cga-lock.xml b/devices/pc/video/ibm/cga/ibm-cga-lock.xml
index 75cdeccfb..d59301da2 100644
--- a/devices/pc/video/ibm/cga/ibm-cga-lock.xml
+++ b/devices/pc/video/ibm/cga/ibm-cga-lock.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<video id="videoCGA" screenwidth="960" screenheight="480" scale="true" touchscreen="mouse" autolock="true" charset="/devices/pc/video/ibm/cga/ibm-cga.json" padding="8px">
+<video id="videoCGA" screenwidth="1280" screenheight="800" scale="true" touchscreen="mouse" autolock="true" charset="/devices/pc/video/ibm/cga/ibm-cga.json" padding="8px">
 	<menu>
 		<title>Color Display</title>
 		<control type="container" pos="right">
diff --git a/devices/pc/video/ibm/cga/ibm-cga.xml b/devices/pc/video/ibm/cga/ibm-cga.xml
index ef2a957f8..82923069c 100644
--- a/devices/pc/video/ibm/cga/ibm-cga.xml
+++ b/devices/pc/video/ibm/cga/ibm-cga.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<video id="videoCGA" screenwidth="960" screenheight="480" scale="true" charset="/devices/pc/video/ibm/cga/ibm-cga.json" pos="center" padding="8px">
+<video id="videoCGA" screenwidth="1280" screenheight="800" scale="true" charset="/devices/pc/video/ibm/cga/ibm-cga.json" pos="center" padding="8px">
 	<menu>
 		<title>Color Display</title>
 		<control type="container" pos="right">
diff --git a/docs/pcjs/examples/components.xsl b/docs/pcjs/examples/components.xsl
index 067702683..d92c71f41 100644
--- a/docs/pcjs/examples/components.xsl
+++ b/docs/pcjs/examples/components.xsl
@@ -11,7 +11,7 @@
 
 	<xsl:variable name="MACHINECLASS">pc</xsl:variable>
 	<xsl:variable name="APPCLASS">pcjs</xsl:variable>
-	<xsl:variable name="APPVERSION">1.21.4</xsl:variable>
+	<xsl:variable name="APPVERSION">1.21.5</xsl:variable>
 	<xsl:variable name="SITEHOST">www.pcjs.org</xsl:variable>
 
 	<xsl:template name="componentStyles">
diff --git a/docs/pcjs/examples/pc-dbg.js b/docs/pcjs/examples/pc-dbg.js
index 5e82cd4d0..a4211aeb0 100644
--- a/docs/pcjs/examples/pc-dbg.js
+++ b/docs/pcjs/examples/pc-dbg.js
@@ -5,14 +5,14 @@ function u(a){return"0x"+r(a,4)}function fa(a,b){var c=a,d=a.lastIndexOf("/");0<
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+function sp(a,b){if(0<=b&&b<a.A.length){var c=a.A[b],d=a.qa.listDisks,e=a.qa.listDrives;if(d&&e&&d.options&&e.options&&(e=ca(e.value,10),c=c.$e?"?":c.Le,!isNaN(e)&&e==b)){for(e=0;e<d.options.length;e++)if(d.options[e].value==c){d.selectedIndex!=e&&(d.selectedIndex=e);break}e==d.options.length&&(d.selectedIndex=0)}}}function zp(a,b,c,d){var e=a.A[b];e.za&&(Ap(a,e.Le,e.za),e.kk="",e.Le="",e.za=null,e.$e=!1,a.X|=128,d||a.Oa("Drive "+String.fromCharCode(65+b)+" unloaded",c),c||d||sp(a,b))}
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 m.ul=function(a,b){var c=0;this.L<this.C&&(c=this.W[this.L]);this.aa&8&&this.N&&dg(this.N,6);A(this)&&x(this,a,null,b,"DATA["+this.L+"]",c);++this.L>=this.C&&(this.ma&=-81,this.L=this.C=0);return c};
 m.Pm=function(a,b,c){A(this)&&x(this,a,b,c,"DATA["+this.C+"]");this.C<this.W.length&&(this.W[this.C++]=b);a=this.W[0]&31;if(void 0!==rp[a]&&this.C>=rp[a].Vd){b=!1;this.L=0;a=Dp(this);var d,e,f,g,h=a&31;switch(h){case 3:Dp(this);Dp(this);Ep(this);break;case 4:c=Dp(this);this.hb=c&3;d=this.A[this.hb];Ep(this);Fp(this,(d.Cb&-16777216)>>>24);break;case 5:case 6:c=Dp(this);b=c>>2&1;this.hb=c&3;d=this.A[this.hb];d.kb=b;c=d.Rb=Dp(this);e=Dp(this);f=d.xb=Dp(this);g=Dp(this);d.Hb=128<<g;d.he=Dp(this);Dp(this);
@@ -627,14 +627,14 @@ var Kp=["XTC","ATC","COMPAQ"],Lp=[{0:[306,2],1:[375,8],2:[306,6],3:[306,4]},{1:[
 8],20:[733,5],21:[733,7],22:[524,4,40],23:[924,8],24:[966,14],25:[966,16],26:[1023,14],27:[832,6,33],28:[1222,15,34],29:[1240,7,34],30:[615,4,25],31:[615,8,25],32:[905,9,25],33:[832,8,33],34:[966,7,34],35:[966,8,34],36:[966,9,34],37:[966,5,34],38:[612,16,63],39:[1023,11,33],40:[1023,15,34],41:[1630,15,52],42:[1023,16,63],43:[805,4,26],44:[805,2,26],45:[748,8,33],46:[748,6,33],47:[966,5,25]}];m=Jp.prototype;m.Qb=function(){return!1};
 m.Ic=function(a,b,c,d){this.ea=b;this.F=c;this.ha=d;this.V=a;if(d=Nc(a,"drives"))this.ua=d;else if(this.Fa)try{this.ua=eval("("+this.Fa+")")}catch(e){w("HDC drive configuration error: "+e.message+" ("+this.Fa+")")}this.N=Eb(a,"ChipSet");this.U=0;this.Ia=3;hc(b,this,this.ja?Mp:Np);lc(b,this,this.ja?Op:Pp);this.ja&&(this.U++,this.N&&5180==this.N.ia&&this.U++,this.Ia=2,b.aa[496]=2,b.fa[496]=2);cf(c,19,this.Zl.bind(this));cf(c,64,this.$l.bind(this));this.reset();Qp(this)||rb(this)};
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-m.save=function(){var a=new hf(this),b=0,c=[];this.ja?(c[b++]=this.X,c[b++]=this.Pa,c[b++]=this.aa,c[b++]=this.Ca,c[b++]=this.ya,c[b++]=this.wa,c[b++]=this.ra,c[b++]=this.ma,c[b++]=this.Ea,c[b++]=[this.ga,this.hb]):(c[b++]=this.pa,c[b++]=this.ma,c[b++]=this.W,c[b++]=this.L,c[b++]=this.C,c[b++]=this.Na,c[b++]=this.Ka,c[b++]=this.Ja,c[b++]=this.ka);for(var d=0,e=[],f=0;f<this.A.length;f++){var g=d++,h=this.A[f],k=0,l=[];l[k++]=h.errorCode;l[k++]=h.lk;l[k++]=h.bf;l[k++]=h.Qe;l[k++]=h.Re;l[k++]=h.kb;
+m.save=function(){var a=new hf(this),b=0,c=[];this.ja?(c[b++]=this.X,c[b++]=this.Pa,c[b++]=this.aa,c[b++]=this.Ca,c[b++]=this.ya,c[b++]=this.wa,c[b++]=this.ra,c[b++]=this.ma,c[b++]=this.Ea,c[b++]=[this.ga,this.hb]):(c[b++]=this.pa,c[b++]=this.ma,c[b++]=this.W,c[b++]=this.L,c[b++]=this.C,c[b++]=this.Na,c[b++]=this.Ka,c[b++]=this.Ja,c[b++]=this.ka);for(var d=0,e=[],f=0;f<this.A.length;f++){var g=d++,h=this.A[f],k=0,l=[];l[k++]=h.errorCode;l[k++]=h.mk;l[k++]=h.bf;l[k++]=h.Qe;l[k++]=h.Re;l[k++]=h.kb;
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 function Rp(a,b,c){var d=0,e=!0;a.hb=-1;if(a.ja){if(null==b&&(b=[0,0,0,0,0,0,0,64,0,[0,-1]]),a.X=b[d++],a.Pa=b[d++],a.aa=b[d++],a.Ca=b[d++],a.ya=b[d++],a.wa=b[d++],a.ra=b[d++],a.ma=b[d++],a.Ea=b[d++],a.ga=b[d++],"object"==typeof a.ga){var f=a.ga;a.ga=f[0];a.hb=f[1]}}else null==b&&(b=[0,0,Array(14),0,0]),a.pa=b[d++],a.ma=b[d++],a.W=b[d++],a.L=b[d++],a.C=b[d++],a.Na=b[d++],a.Ka=b[d++],a.Ja=b[d++],f=b[d++],void 0!==f?a.ka=f:void 0===a.ka&&(a.ka=-1);void 0===a.A&&(a.A=Array(a.ua.length));b=b[d];void 0===
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+b&&(b=[]);for(d=0;d<a.A.length;d++){void 0===a.A[d]&&(a.A[d]={});var f=a.A[d],g=a,h=d,k=f,l=a.ua[d],n=b[d],q=c,p=0,z=!0;void 0===n&&(n=[0,0,!1,Array(8)]);k.hb=h;k.errorCode=n[p++];k.mk=n[p++];k.bf=n[p++];k.Qe=n[p++];k.Re=n[p++];k.kb=n[p++];k.ub=n[p++];k.de=n[p++];k.xb=n[p++];k.he=n[p++];k.Hb=n[p++];k.lg=g.ja?0:1;k.name=l.name;void 0===k.name&&(k.name="Hard Drive");k.path=l.path;k.mode=l.mode||(k.path?"preload":"local");"demandro"!=k.mode&&"demandrw"!=k.mode||g.ke()||(k.mode="local");k.type=l.type;
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 function Sp(a,b,c){if(b){var d=0,e=0;null==c&&((d=b.Qe[2])?e=b.Qe[0]<<8|b.Qe[1]:c=b.type);null==c||d||(d=Lp[a.U][c][1],e=Lp[a.U][c][0]);d&&((c=Lp[a.U][b.type])&&e!=c[0]&&d!=c[1]&&a.Oa("Warning: drive parameters ("+e+","+d+") do not match drive type "+b.type+" ("+c[0]+","+c[1]+")"),b.Bb=e,b.ub=d,null==b.za&&(b.za=new Ho(a,b,b.mode)))}}
-m.kk=function(a,b,c){if(a.za){var d=a.za.info(),e=d[0];if(e){var f=d[2],g=d[1]*f;if(b+c<=e*g)return a.de=Math.floor(b/g),b%=g,a.kb=Math.floor(b/f),a.xb=b%f,a.Hb=c*d[3],a.errorCode=0,!0}}return!1};
+m.lk=function(a,b,c){if(a.za){var d=a.za.info(),e=d[0];if(e){var f=d[2],g=d[1]*f;if(b+c<=e*g)return a.de=Math.floor(b/g),b%=g,a.kb=Math.floor(b/f),a.xb=b%f,a.Hb=c*d[3],a.errorCode=0,!0}}return!1};
 function Qp(a,b){b||(a.fa=0);for(var c=0;c<a.A.length;c++){var d=a.A[c];if(d.name&&d.path){if(!(b&&d.za&&d.za.qg)){var e;e=a;var f=d.name,d=d.path,g=e.A[c];g.bd?(e.Oa("Drive "+c+" busy"),e=!0):(g.bd=!0,g.Ae=!0,e.fa++,A(e)&&y(e,"loading "+f),(g.za||new Ho(e,g,g.mode)).load(f,d,null,e.Ok),e=!1);!e&&b&&rb(a,!1)}}else b&&void 0!==d.type&&(d.za=null,Sp(a,d,d.type))}return!!a.fa}
 m.Ok=function(a,b,c){a.bd=!1;if(a.za=b)this.Oa('Mounted disk "'+c+'" in drive '+String.fromCharCode(67+a.hb),a.Ae),b=b.info(),b[0]==a.Bb&&b[1]==a.ub&&b[2]==a.lb&&b[3]==a.Va||this.Oa("Warning: disk geometry ("+b[0]+":"+b[1]+":"+b[2]+") does not match "+Kp[this.U]+" drive type "+a.type+" ("+a.Bb+":"+a.ub+":"+a.lb+")");a.Ae&&(a.Ae=!1,--this.fa||rb(this))};
 m.Xl=function(a,b){var c=0;this.L<this.C&&(c=this.W[this.L]);this.N&&dg(this.N,5);this.ma&=-33;x(this,a,null,b,"DATA["+this.L+"]",c);++this.L>=this.C&&(this.L=this.C=0,this.ma&=-15);return c};m.nn=function(a,b,c){x(this,a,b,c,"DATA["+this.C+"]");this.C<this.W.length&&(this.W[this.C++]=b);a=12!=this.W[0]?6:this.W.length;6==this.C&&(this.ma&=-2);this.C>=a&&(this.ma|=2,this.ma&=-2,Tp(this))};m.Yl=function(a,b){var c=this.ma;x(this,a,null,b,"STATUS",c);this.L<this.C&&(this.ma|=1);return c};
@@ -645,7 +645,7 @@ m.zm=function(a,b,c){x(this,a,b,c,"SECCNT");this.aa=b};m.gl=function(a,b){var c=
 m.xm=function(a,b,c){x(this,a,b,c,"DRVHD");this.ra=b;this.ma=this.A[this.ra&16?1:0]?this.ma|80:this.ma&-65};m.hl=function(a,b){var c=this.ma;x(this,a,null,b,"STATUS",c);this.ma&64&&(this.ma&=-129);return c};m.tm=function(a,b,c){x(this,a,b,c,"COMMAND");this.Ea=b;this.N&&dg(this.N,14);Zp(this)};m.ym=function(a,b,c){x(this,a,b,c,"FDR");this.ga&4&&!(b&4)&&(this.X=1);this.ga=b};
 function Zp(a){var b=!1,c=a.Ea,d=a.ra&16?1:0,e=a.ra&15,f=a.ya|(a.wa&3)<<8,g=a.Ca,h=a.aa||256;a.hb=-1;a.B=null;a.X=0;a.ma=80;var k=a.A[d];k?(k.de=f,k.kb=e,k.xb=g,k.Hb=h*k.Va,c=144<=c?c:c&240,k.pb=null,k.eb=0,k.errorCode=0,a.hb=d,a.B=k):c=-1;switch(c&240){case 16:b=!0;break;case 32:a.ma=128;Vp(k,function(b){0<=b&&a.N?(Wp(a),a.ma=88):(a.ma=1,a.X=16)},!1);break;case 48:a.ma=8;break;case 64:b=!0;break;case 112:b=!0;break;case 144:a.X=1;b=!0;break;case 145:k.ub=e+1,k.lb=h,b=!0}b&&Wp(a)}
 function Wp(a){!a.N||a.ga&2||eg(a.N,14,120)}
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+function Tp(a){a.L=0;var b=$p(a),c=$p(a),d=c&32,e=d>>5,f=c&31,g=$p(a),h=$p(a),k=g<<2&768|h,l=g&63,n=$p(a),q=$p(a),p=a.A[e];p&&(p.de=k,p.kb=f,p.xb=l,p.Hb=n*p.Va);switch(b){case 3:aq(a,p?p.errorCode:4);bq(a,c);bq(a,g);bq(a,h);bq(a,0|d);b=-1;break;case 12:for(c=0;0<=(b=$p(a));)p&&c<p.Qe.length&&(p.Qe[c++]=b);p&&Sp(a,p);b=0;p||a.ka!=e||(a.ka=-1,b=2);aq(a,b|d);b=-1;break;case 224:case 228:aq(a,0|d),b=-1}if(0<=b)switch(void 0===p?b=-1:(p.errorCode=0,p.mk=0),b){case 0:aq(a,0|d);break;case 1:p.Bf=q;aq(a,
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 function cq(a,b,c){b.errorCode=4;if(b.za&&(b.pb=null,a.N)){b.errorCode=0;xl(a.N,3,a,"dmaRead",b);pl(a.N,3,function(a){a||0!=b.errorCode||(b.errorCode=4);c(b.errorCode?2:0)});return}c(b.errorCode?2:0)}function dq(a,b,c){b.errorCode=4;if(b.za&&(b.pb=null,a.N)){b.errorCode=0;xl(a.N,3,a,"dmaWrite",b);pl(a.N,3,function(a){a||(0==b.errorCode&&(b.errorCode=4),20==b.errorCode&&(b.errorCode=0));c(b.errorCode?2:0)});return}c(b.errorCode?2:0)}
@@ -695,7 +695,7 @@ m.tb=function(a,b){return a.Sb?this.oa(a,b?4:0):this.na(a,b?2:0)};m.na=function(
 m.jb=function(a,b,c){var d=this.dc(a,!0,2);-1!==d&&(5!=a.type?this.F.jb(d,b):fc(this.ea,d,b),c&&Tq(this,a,c),Qc(this.F,!0))};function hq(a,b,c,d,e,f,g){return Uq(a,{},b,c,d,e,f,g)}function Uq(a,b,c,d,e,f,g,h){b.Ra=c||0;b.Z=d;b.Da=e;b.type=f||(Sq(a)?2:1);b.Sb=null!=g?g:a.F&&4==a.F.va.ba;b.pc=null!=h?h:a.F&&4==a.F.va.Oc;b.Xd=!1;return b}function Vq(a){return[a.Ra,a.Z,a.Da,a.Xd,a.Sb,a.pc,a.Se,a.Wd]}function Wq(a){return{Ra:a[0],Z:a[1],Da:a[2],Xd:a[3],Sb:a[4],pc:a[5],Se:a[6],Wd:a[7]}}
 function Xq(a,b,c){if(null!=b.Z&&(a=Eq(a,b.Z,b.type))){var d=b.Ra&a.Ba;if(!a.cd){if(d>>>0>=a.Zb)return!1}else if(d>>>0<a.Zb)return!1;c&&(b.Ra=d,b.Sb=4==a.ba,b.pc=4==a.Oc)}return!0}
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@@ -743,7 +743,7 @@ function Dr(a,b,c,d){var e={},f=a.B[b].ri,g=0,h=null;0<=c&&c<f.length&&(g=f[c][0
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 function Gr(a,b){var c=b.match(/^\s*([A-Z_]?[A-Z0-9_]*)\s*(=?)\s*(.*)$/i);if(c){if(!c[1])return Cr(a)||a.O("no variables"),!0;if(!c[2])return Cr(a,c[1]);if(!c[3])return delete a.wa[c[1]],!0;var d=$q(a,c[3]);return void 0!==d?(a.wa[c[1]]=d,!0):!1}a.O("invalid assignment:"+b);return!1}
 function Hr(a,b,c){var d=null;if(b=Yq(a,b,!0)){a.dc(b);var e=sr(a,b,!0);if(e.length){var f,g;e[0]&&(g="",(f=b.Ra-e[1])&&(g=" + "+u(f)),f=e[0]+" ("+Hq(e[1],b.Z)+")"+g,c&&a.O(f),d=f);4<e.length&&e[4]&&(g="",(f=e[5]-b.Ra)&&(g=" - "+u(f)),f=e[4]+" ("+Hq(e[5],b.Z)+")"+g,c&&a.O(f),d||(d=f))}else c&&a.O("no symbols")}return d}
-function Ir(a,b){if(b[1]&&"?"!=b[1]){var c="json"==b[1],d,e=0,f=0,g=c?{}:Yq(a,b[1]);if(g&&(d=Dq(a,b[2],"drive #"),void 0!==d)){if(!c){e=Dq(a,b[3],"sector #");if(void 0===e)return;f=Dq(a,b[4],"# of sectors");void 0===f&&(f=1)}var h=a.tc;2<=d&&a.Jb&&(d-=2,h=a.Jb);if(h){var k=h.Gi(d);if(k)if(k.za)if(c)Er(a),a.O(k.za.toJSON());else if(h.kk(k,e,f)){for(var l=0,n=!1,c=Rq(g);!n&&0<k.Hb--;)(function(a,b){h.jc(k,function(c){0>c?(a.O("out of data at address "+Rq(b)),n=!0):(a.qc(b,c,1),l++)})})(a,g);a.O(l+" bytes read at "+
+function Ir(a,b){if(b[1]&&"?"!=b[1]){var c="json"==b[1],d,e=0,f=0,g=c?{}:Yq(a,b[1]);if(g&&(d=Dq(a,b[2],"drive #"),void 0!==d)){if(!c){e=Dq(a,b[3],"sector #");if(void 0===e)return;f=Dq(a,b[4],"# of sectors");void 0===f&&(f=1)}var h=a.tc;2<=d&&a.Jb&&(d-=2,h=a.Jb);if(h){var k=h.Gi(d);if(k)if(k.za)if(c)Er(a),a.O(k.za.toJSON());else if(h.lk(k,e,f)){for(var l=0,n=!1,c=Rq(g);!n&&0<k.Hb--;)(function(a,b){h.jc(k,function(c){0>c?(a.O("out of data at address "+Rq(b)),n=!0):(a.qc(b,c,1),l++)})})(a,g);a.O(l+" bytes read at "+
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 function ir(a,b){var c;if(b&&"?"==b[1])a.O("register commands:"),a.O("\tr\tdump registers"),a.Tb&&a.O("\trfp\tdump floating-point registers"),a.O("\trp\tdump all registers"),a.O("\trx [#]\tset flag or register x to [#]");else{var d;null==c&&(c=!0);if(null!=b&&1<b.length){var e=b[1];if(a.Tb&&"fp"==e){c=a.Tb;d=Zf(c);for(var f=c.kc,g=0;8>g;g++){var h=c,e=null;if(g<h.V.length){var e=[],k=h.B+g&7;e[0]=k;e[1]=ng(h,k);e[2]=h.V[k];k<<=1;e[3]=h.aa[k];e[4]=h.aa[k+1];h=Bg(h,e[3],e[4]);e[5]=h[0];e[6]=h[1];e[7]=
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@@ -764,30 +764,30 @@ a.O(Vb))}else if("symbols"==ja)for(var wa=0;wa<a.B.length;wa++){var Vd=a.B[wa],R
 a.ea,Da={};Da.bk=(Te&-4194304)>>>20;Da.ui=a.F.Pd+Da.bk;Da.yb=ce.sa[(Da.ui&ce.Gb)>>>ce.La];Da.Ui=Da.yb.Nd(Da.bk);Da.ck=(Te&4190208)>>>10;Da.vi=(Da.Ui&-4096)+Da.ck;Da.zb=ce.sa[(Da.vi&ce.Gb)>>>ce.La];Da.Vi=Da.zb.Nd(Da.ck);Da.Fk=(Da.Vi&-4096)+(Te&4095)}if(be=Da){a.O("linear     PDE addr   PDE             PTE addr   PTE             physical");a.O("---------  ---------- --------        ---------- --------        ----------");var qd="%"+r(Te),qd=qd+("  %%"+cr(be.ui,be.Ui)),qd=qd+("  %%"+cr(be.vi,be.Vi,!0)),
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-var ji=P[0];if(ji){var Ve=Dq(a,ji);if(void 0===Ve||0>Ve||255<Ve)a.O("invalid vector: "+ji);else{var Jn="&",Kn=!!(a.F.Za&1),Ln=!1,og=a.F.Mc+(Ve<<(Kn?3:2)),ki=a.F.na(og+0),gs=a.F.na(og+2);Kn&&(Jn="#",a.F.na(og+4)&2048&&(Ln=!0,ki|=a.F.na(og+6)<<16));a.O("dumpIDT("+u(Ve)+"): "+Jn+r(gs,4)+":"+r(ki,Ln?8:4))}}else a.O("no IDT vector")}else if("dt"==ia)P.shift(),a.O("no information");else{var ee=Yq(a,ja);if(ee&&(null!=ee.Z||null!=ee.Da)){var pg=0;Ha&&("l"==Ha.charAt(0)&&(Ha=Ha.substr(1)||Xa),pg=Dq(a,Ha)>>>
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-(a.cb=!0);if(void 0!==Sn){var pi=Yq(a,Sn,!0);if(!pi)break a;ar(a,pi,js);a.Sd(a.A,pi,!0)}a.Ke(!0)||c||a.O("cpu busy or unavailable, run command ignored")}break;case "h":var qi;a.la.Ib?(qi="halting",a.Wb()):qi="already halted";c||a.O(qi);break;case "i":if("if"==g[0]){var ri;var Ye=b.substr(2),Ye=na(Ye);$q(a,Ye)?(c||a.O("true: "+Ye),ri=!0):(c||a.O("false: "+Ye),ri=!1);ri||(d=!1);break}if("int"==g[0]){var vg;a:switch(Dq(a,g[1])){case 19:kk(a,19,a.F.Ga,!0);a.ya=a.pa;vg=!0;break a;case 33:kk(a,33,a.F.Ga,
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diff --git a/docs/pcjs/examples/pc.js b/docs/pcjs/examples/pc.js
index 81f50f300..3e897b041 100644
--- a/docs/pcjs/examples/pc.js
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+b,c,d){return function(){b.style.height=(a.clientWidth*d/c|0)+"px"}}(c,e,d.screenWidth,d.screenHeight),c.onresize());var f=+La.aspect;f&&(Da("onresize",function(a,b,c){return function(){b.style.height=(a.clientWidth/c|0)+"px"}}(c,e,f)),window.onresize());c.appendChild(e);f=document.createElement("textarea");ya("iOS")&&(f.setAttribute("autocapitalize","off"),f.setAttribute("autocorrect","off"));c.appendChild(f);var g=e.getContext("2d"),d=new Y(d,e,g,f,c);Ya(d,c)}});
 function Hl(a){this.I=a.adapter;switch(this.I){case 1:this.G=956;this.D=7;break;case 2:this.G=888;this.D=7;break;case 3:this.G=632;this.D=5;break;default:n("Unrecognized parallel adapter #"+this.I);return}this.B=this.C=null;Ia.call(this,"ParallelPort",a,Hl);a=a.binding;"console"==a?this.C="":Xa(this,a,Il)}Qa(Hl);var Il="buffer";l=Hl.prototype;l.zb=function(a,b,c){switch(b){case Il:return this.la[b]=this.B=c,!0}return!1};
 l.pc=function(a,b,c,d){this.ha=b;this.A=c;this.Ia=d;this.P=kb(a,"ChipSet");Nb(b,this,Jl,this.G);Pb(b,this,Kl,this.G);ab(this)};l.Vb=function(a,b){if(!b)if(!a||!this.restore)this.reset();else if(!this.restore(a))return!1;return!0};l.Ub=function(a){return a?this.save():!0};l.reset=function(){Ll(this)};l.save=function(){var a=new ce(this),b=0,c=[];c[b++]=this.H;c[b++]=this.Db;c[b]=this.Ie;C(a,0,c);return a.data()};l.restore=function(a){return Ll(this,a[0])};
 function Ll(a,b){var c=0;void 0===b&&(b=[0,0,0]);a.H=b[c++];a.Db=b[c++];a.Ie=b[c];return!0}l.jk=function(){return this.H};l.Ik=function(){return this.Db};l.fk=function(){return this.Ie};
@@ -523,10 +523,10 @@ l.je=function(a,b){if(this.cc&&this.A&&this.A.ea.Sb)switch(a){case ml:if(this.P!
 function am(a,b,c){Ia.call(this,"Disk",{id:a.lf+".disk"+ea(++bm,4)},am);this.controller=a;this.aa=a.aa;this.Ia=a.Ia;this.C=b;this.B=b.name;this.oe=b.oe;this.Af=this.D=!1;cm(this,c,b.ib,b.jb,b.eb,b.nb);this.I=[];this.P=[];this.G=null;this.S=0;this.R=!1;ab(this)}var bm=0;Qa(am);l=am.prototype;l.pc=function(a,b,c,d){this.Ia=d};l.Vb=function(a,b){b||!this.Af||this.D||(ab(this,!1),this.load(this.B,this.H,null,this.Gj,this));return!0};l.Gj=function(){ab(this,!0)};
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 function cm(a,b,c,d,e,f){a.mode=b;a.ib=c;a.jb=d;a.eb=e;a.nb=f;a.A=[];if("preload"!=a.mode){b=Array(a.ib);for(c=0;c<b.length;c++){d=Array(a.jb);for(e=0;e<d.length;e++){f=Array(a.eb);for(var g=1;g<=f.length;g++)f[g-1]=em(null,c,e,g,a.nb,"local"==a.mode?0:null);d[e]=f}b[c]=d}a.A=b}a.L=null}
-l.load=function(a,b,c,d,e){var f=b;if(this.K)return!0;this.B=a;this.H=b;this.gj=fa(b);var g=this;this.K=d;this.ha=e||this.controller;if(c){var h=new FileReader;h.onload=function(){var a=h.result,b,c=a?a.byteLength:0,d=ba[c];if(d){g.ib=d[0];g.jb=d[1];g.eb=d[2];g.nb=512;b=g.nb>>2;var e=d=0,a=new DataView(a,0,c);g.A=Array(g.ib);for(c=0;c<g.A.length;c++)for(var f=g.A[c]=Array(g.jb),E=0;E<f.length;E++)for(var J=f[E]=Array(g.eb),W=0;W<J.length;W++){for(var da=em(null,c,E,W+1,g.nb,0),ua=da.data,va=0;va<
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+function gm(a,b,c,d){var e=null;a.re=!1;var f=0>d&&a.aa&&!a.aa.ea.Rb;if(a.Af)d?a.controller.Ca('Unable to connect to disk "'+a.H+'" (error '+d+": "+c+")",f):(a.D=!0,e=a);else if(d)a.controller.Ca('Unable to load disk "'+a.B+'" (error '+d+": "+b+")",f);else{Sa(a.controller.lf,b,c);try{if(0<fa(a.hj,!0).toLowerCase().indexOf("-readonly"))a.re=!0;else{var g=c.indexOf("\n");0<g&&1024>g&&0<c.substring(0,g).indexOf("write-protected")&&(a.re=!0)}var h;"<"==c.substr(0,1)?h=["Missing disk image: "+a.B]:h=0>
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@@ -541,66 +541,66 @@ l.save=function(){var a=0,b=[];b[a++]=[this.H,this.L,this.ib,this.jb,this.eb,thi
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 b+" changes applied)";b=-1;break}if(this.re){c="unable to modify write-protected disk";b=-1;break}e=g[f++];f=g[f++];g=e+f.length;if(h=this.A[h][k][m]){for(k=h.data.length;k<e;)h.data[k++]=h.pattern;k=0;h.Uc=e;for(h.Dc=f.length;e<g;)h.data[e++]=f[k++];b++}}}0>b&&-2!=b&&this.controller.Ca("Unable to restore disk '"+this.B+": "+c);return b};
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+function pm(a){var b=a.data,c=b.length;if(c<<2==a.length){for(var d=c-1,e=b[d],f=0;d--&&b[d]===e;)f++;f++&&(b.length=c-f,a.pattern=e)}}function qm(a){Ia.call(this,"FDC",a,qm);this.dmaRead=this.qj;this.dmaWrite=this.rj;this.dmaFormat=this.Cj;this.K=a.autoMount||null;this.C=[];this.X=!ya("Mobi")&&window&&"FileReader"in window}Qa(qm);aa={};
 var rm={3:{jd:3,xd:0,name:aa.Fm},4:{jd:2,xd:1,name:aa.Dm},5:{jd:9,xd:7,name:aa.Nm},6:{jd:9,xd:7,name:aa.ym},7:{jd:2,xd:0,name:aa.Am},8:{jd:1,xd:2,name:aa.Em},10:{jd:2,xd:7,name:aa.zm},13:{jd:6,xd:7,name:aa.km},15:{jd:3,xd:0,name:aa.Cm}};l=qm.prototype;
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-case "loadDrive":return this.la[b]=c,c.onclick=function(){var a=d.la.listDisks;a&&tm(d,a.options[a.selectedIndex].text,a.value)},!0;case "saveDrive":if(!this.X){c.parentNode.removeChild(c);break}this.la[b]=c;c.onclick=function(){var a=d.la.listDrives;if(a&&a.options&&d.B)if(a=ca(a.value,10),a=d.B[a])if(a.ta){for(var b=a.ta,c="",h=0,k;k=im(b,h++);)for(var m=0,p=k.length;m<p;m++)c+=String.fromCharCode(jm(b,k,m));a=za(btoa(c),"octet-stream",!0,a.ta.gj.replace(".json",".img"));n(a)}else d.Ca("No disk loaded in drive");
+case "loadDrive":return this.la[b]=c,c.onclick=function(){var a=d.la.listDisks;a&&tm(d,a.options[a.selectedIndex].text,a.value)},!0;case "saveDrive":if(!this.X){c.parentNode.removeChild(c);break}this.la[b]=c;c.onclick=function(){var a=d.la.listDrives;if(a&&a.options&&d.B)if(a=ca(a.value,10),a=d.B[a])if(a.ta){for(var b=a.ta,c="",h=0,k;k=im(b,h++);)for(var m=0,p=k.length;m<p;m++)c+=String.fromCharCode(jm(b,k,m));a=za(btoa(c),"octet-stream",!0,a.ta.hj.replace(".json",".img"));n(a)}else d.Ca("No disk loaded in drive");
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 l.pc=function(a,b,c,d){this.ha=b;this.A=c;this.Ia=d;this.aa=a;this.P=kb(a,"ChipSet");if((this.K=jc(this.aa,"autoMount")||this.K)&&"string"==typeof this.K)try{this.K=eval("("+this.K+")")}catch(e){n("FDC auto-mount error: "+e.message+" ("+this.K+")"),this.K=null}um(this);Nb(b,this,vm);Pb(b,this,wm);this.X&&xm(this,"Local Disk","?");xm(this,"Remote Disk","??");ym(this)||ab(this)};
 l.Vb=function(a,b){if(!b){if(!a||!this.restore){if(this.reset(),this.aa.jg){this.C=[];for(var c=0;c<this.B.length;c++)zm(this,c,!0);ym(this,!0)}}else if(!this.restore(a))return!1;if(c=this.la.listDrives){for(;c.firstChild;)c.removeChild(c.firstChild);c.textContent="";for(var d=0;d<this.Y;d++){var e=document.createElement("option");e.value=d;e.textContent=String.fromCharCode(65+d)+":";c.appendChild(e)}0<this.Y&&(c.value="0",sm(this,0))}}return!0};l.Ub=function(a){return a?this.save():!0};l.reset=function(){um(this)};
-l.save=function(){var a=new ce(this),b=0,c=[];c[b++]=this.Qa;c[b++]=0;c[b++]=this.Z;c[b++]=this.I;c[b++]=this.G;c[b++]=this.D;c[b++]=this.S;for(var d=b++,e=0,f=[],g=0;g<this.B.length;g++){var h=e++,k=this.B[g],m=0,p=[];p[m++]=k.kb;p[m++]=[k.name,k.ib,k.jb,k.eb,k.nb,k.oe,k.Hf,k.Ue,k.Ve];p[m++]=k.Ya;p[m++]=k.vd+100;p[m++]=k.xb;p[m++]=k.mb;p[m++]=k.wd;p[m++]=k.wb;p[m++]=k.Ua;p[m++]=k.me;p[m++]=k.hj;p[m]=k.Vd;f[h]=p}c[d]=f;d=b++;for(e=0;e<this.B.length;e++)f=this.B[e],f.ta&&Am(this,f.Vd,f.ta);c[d]=this.C;
+l.save=function(){var a=new ce(this),b=0,c=[];c[b++]=this.Qa;c[b++]=0;c[b++]=this.Z;c[b++]=this.I;c[b++]=this.G;c[b++]=this.D;c[b++]=this.S;for(var d=b++,e=0,f=[],g=0;g<this.B.length;g++){var h=e++,k=this.B[g],m=0,p=[];p[m++]=k.kb;p[m++]=[k.name,k.ib,k.jb,k.eb,k.nb,k.oe,k.Hf,k.Ue,k.Ve];p[m++]=k.Ya;p[m++]=k.vd+100;p[m++]=k.xb;p[m++]=k.mb;p[m++]=k.wd;p[m++]=k.wb;p[m++]=k.Ua;p[m++]=k.me;p[m++]=k.ij;p[m]=k.Vd;f[h]=p}c[d]=f;d=b++;for(e=0;e<this.B.length;e++)f=this.B[e],f.ta&&Am(this,f.Vd,f.ta);c[d]=this.C;
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 this.id))&&this.D.gg)for(b=0;b<e.length;b++)d=e[b],d.Ca=this.D.Ca,d.rc=this.D.rc,d.gg=this.D.gg;for(b=0;b<e.length;b++)d=e[b],d.pc&&d.pc(this,this.ha,this.A,this.Ia);b=null;d=a.resume;void 0!==d&&(1<d.length?b=this.P=d:this.B=parseInt(d,10));var f;if(a=jc(this,"state")||(f=!0,a.state))b=this.X=a,f||(this.K=!0,this.B=qn),this.B&&(this.S=new ce(this,sn),this.S.load()?b=null:delete this.S);!b&&this.B&&(b=tn(this))&&(this.K=!0);if(b){var g=this;pa(b,null,!0,function(a,b,c){c?(g.P=null,g.K=!1,g.Ca("Unable to load machine state from server (error "+
 c+(b?": "+(String.prototype.trim?b.trim():b.replace(/^\s+|\s+$/g,"")):"")+")")):(g.R=b,g.da=!0);ab(g)})}else ab(this);this.la.power||(this.aa=!0);!c&&this.aa&&un(this,this.df)}else n("Unable to find CPU component")}Qa(on);var sn="1.21.4",qn=0;l=on.prototype;l.se=function(){return this.ma};function pn(a,b){if(!b){var c;if("object"==typeof resources&&(c=resources.parms))try{b=eval("("+c+")")}catch(d){n(d.message+" ("+c+")")}}a.L=b}
-function jc(a,b,c){var d=b.toLowerCase(),d=La&&(La[b]||La[d]);void 0===d&&a.L&&(d=a.L[b]);void 0===d&&c&&(d=c[b]);void 0===d&&"object"==typeof resources&&resources[b]&&(d=b);return d}l.zd=function(){return this.C||""};function un(a,b,c){for(var d=Ta(a.id),e=0;e<=d.length;e++){var f=e<d.length?d[e]:a;if(!bb(f)){bb(f,function(){un(a,b,c)});return}}b.call(a,c)}
+function jc(a,b,c){var d=b.toLowerCase(),d=La[b]||La[d];void 0===d&&a.L&&(d=a.L[b]);void 0===d&&c&&(d=c[b]);void 0===d&&"object"==typeof resources&&resources[b]&&(d=b);return d}l.zd=function(){return this.C||""};function un(a,b,c){for(var d=Ta(a.id),e=0;e<=d.length;e++){var f=e<d.length?d[e]:a;if(!bb(f)){bb(f,function(){un(a,b,c)});return}}b.call(a,c)}
 function vn(a,b){var c=new ce(a,sn,"validate");if(c.load()&&mn(c)){var d=nn(c,"timestamp"),e=b?nn(b,"timestamp"):"unknown";d!=e&&(a.Ca("Machine state may be out-of-date\n("+d+" vs. "+e+")\nCheck your browser's local storage limits"),b||c.clear())}}
 l.df=function(a){void 0===a&&(a=this.B||(this.R?1:qn));if(!this.G){this.G++;var b=!1,c=!1;this.ba=!1;var d=this.S||new ce(this,sn);if(-1==a)b=!0;else if(a>qn){if(d.load(this.R)){this.H=new ce(this,sn,"failsafe");this.H.load()&&(wn(this,d),a=2,kn(this.H));C(this.H,"timestamp",la());ln(this.H);var e=this.B&&!this.K;if(1==a||ra("Click OK to restore the previous PCjs machine state, or CANCEL to reset the machine.")){if(c=mn(d)){var f=nn(d,"code"),g=nn(d,"data");f&&("ok"==f?d.load(g):("error"==f&&"no machine state"!=
 g?(this.Ca("Error: "+g),"unable to verify user"==g&&(xa("user",""),this.C=null)):this.rc(f+": "+g),kn(d),d.load()?(c=mn(d),e=!0):c=!1))}e&&vn(this,c?d:null)}else 2==a&&d.clear()}else vn(this);delete this.R;delete this.S}e=Ta(this.id);for(f=0;f<e.length;f++)g=e[f],g!==this&&g!=this.A&&(c=xn(this,g,d,b,c));b=[d,a,c];-1!=a?un(this,this.Mh,b):this.Mh(b)}};
@@ -631,4 +631,4 @@ a):f("transformToFragment failed")):f("unable to transform XML: unsupported brow
 function Gn(a,b,c,d){if(!c&&b){d.push(b);a=Ra[d[0]];b=null;for(var e in a)if(ha(e,"components.xsl")){b=e.replace(".xsl",".css");break}b?pa(b,null,!0,function(a,b){Hn(b,d)}):Hn(null,d)}else n("Error ("+c+") requesting "+a)}
 function Hn(a,b){var c,d,e,f=b[0],g=b[1];c=b[4];c=c.match(/^(\s*\(function\(\)\{)([\s\S]*)(}\)\(\);\s*)$/);var h=Ra[f],k={},m;for(m in h){var p=h[m],x=ga(m);if("xml"==x){for(x=/[ \t]*<disk [^>]*path=(['"])(.*?)\1.*?<\/disk>\n?/g;d=x.exec(h[m]);){var r=d[2];r&&(h[r]||(p=p.replace(d[0],"")))}d=m=fa(m)}else"xsl"==x&&(e=m=fa(m));k[m]=p}a&&(k[m="css"]=a);b[2]&&(k[m="parms"]=b[2]);b[3]&&(k[m="state"]=b[3]);d&&e?(m=JSON.stringify(k),g+=".js",c=c[1]+"var resources="+m+";"+c[2]+c[3],c=c.replace(/\u00A9/g,
 "&#xA9;"),c=za(c,"javascript",!1,g),c=c+(', copy it to your web server as "'+g+'", and then add the following to your web page:\n\n')+('<div id="'+f+'"></div>\n'),c+="...\n",c+='<script type="text/javascript" src="'+g+'">\x3c/script>\n',c+='<script type="text/javascript">embedPC("'+f+'","'+d+'","'+e+'");\x3c/script>\n\n',c+="The machine should appear where the <div> is located.",n(c)):n("Missing XML/XSL resources")}
-window.savePC=function(a,b){var c=Va("Computer",a),d=Va("Debugger",a);if(c){var e=yn(c,!0),f=c.L?JSON.stringify(c.L):null;b||(b="/versions/pcjs/1.21.4/pc"+(d?"-dbg":"")+".js");pa(b,null,!0,function(c,d,k){Gn(c,d,k,[a,fa(b,!0),f,e])});return!0}n("Unable to identify machine '"+a+"'");return!1};})();
+window.savePC=function(a,b,c){var d=Va("Computer",a),e=Va("Debugger",a);if(d){var f=yn(d,!0),g=d.L?JSON.stringify(d.L):null;b||(b="/versions/pcjs/1.21.4/pc"+(e?"-dbg":"")+".js");if(c&&c({state:f,ej:g}))return!0;pa(b,null,!0,function(c,d,e){Gn(c,d,e,[a,fa(b,!0),g,f])});return!0}n("Unable to identify machine '"+a+"'");return!1};})();
diff --git a/modules/README.md b/modules/README.md
index 3dbda3fae..438784e84 100644
--- a/modules/README.md
+++ b/modules/README.md
@@ -1,8 +1,26 @@
-PCjs Node Modules
+---
+layout: page
+title: PCjs Project Modules
+permalink: /modules/
+---
+
+Project Modules
 ===
 
-This folder contains all the **PCjs** JavaScript source code, organized into Node modules.  It is the counterpart to
-**node_modules**, where all the *public* Node modules are installed.
+This folder contains all the JavaScript source code for the PCjs Project, organized into Node modules.
+It is the counterpart to **node_modules**, where all the *public* Node modules are installed.
+
+The project includes these Emulation Modules:
+
+* C1Pjs, the 6502-based C1P Emulation Module
+* [PCjs](pcjs/), the x86-based IBM PC Emulation Module
+
+along with variety of support modules, such as:
+
+* [DiskDump](diskdump/)
+* [FileDump](filedump/)
+* [HTMLOut](htmlout/)
+* [MarkOut](markout/)
 
 Only private Node modules are checked into this project.  If any of these modules are later published on
 [npmjs.org](http://npmjs.org), then they will be moved to **node_modules** and removed from this folder.
diff --git a/modules/diskdump/README.md b/modules/diskdump/README.md
index 75437f9a7..eadfb6189 100644
--- a/modules/diskdump/README.md
+++ b/modules/diskdump/README.md
@@ -1,10 +1,10 @@
 ---
 layout: page
-title: DiskDump
+title: DiskDump Module
 permalink: /modules/diskdump/
 ---
 
-DiskDump
+DiskDump Module
 ===
 
 **DiskDump** is a Node module with both a command-line interface and a web server API for converting disk images
diff --git a/modules/filedump/README.md b/modules/filedump/README.md
index 8f33c8056..cb46bcf3c 100644
--- a/modules/filedump/README.md
+++ b/modules/filedump/README.md
@@ -1,10 +1,10 @@
 ---
 layout: page
-title: FileDump
+title: FileDump Module
 permalink: /modules/filedump/
 ---
 
-FileDump
+FileDump Module
 ===
 
-Module (and command-line utility) for converting the contents of files to JSON.
+This module (and command-line utility) is used to convert the contents of binary files to JSON.
diff --git a/modules/htmlout/README.md b/modules/htmlout/README.md
index b02a48e28..ece17b100 100644
--- a/modules/htmlout/README.md
+++ b/modules/htmlout/README.md
@@ -1,5 +1,12 @@
-HTMLOut
+---
+layout: page
+title: HTMLOut Module
+permalink: /modules/htmlout/
+---
+
+HTMLOut Module
 ===
+
 This module provides a filter() function for [server.js](../../../server.js),
 our Express-based web server.  The function is installed like so:
 
diff --git a/modules/markout/README.md b/modules/markout/README.md
index c1df32ca2..63bffbaf4 100644
--- a/modules/markout/README.md
+++ b/modules/markout/README.md
@@ -1,5 +1,12 @@
-MarkOut
+---
+layout: page
+title: MarkOut Module
+permalink: /modules/markout/
+---
+
+MarkOut Module
 ===
-This modules transforms a subset of Markdown into HTML.  It's used by the
+
+This module transforms a subset of Markdown into HTML.  It's used by the
 [HTMLOut](../htmlout) module to process README.md files and incorporate their
 contents into the "index.html" files that we generate when browsing directories.
diff --git a/modules/pcjs/README.md b/modules/pcjs/README.md
new file mode 100644
index 000000000..9646eabba
--- /dev/null
+++ b/modules/pcjs/README.md
@@ -0,0 +1,113 @@
+---
+layout: page
+title: IBM PC Emulation Module
+permalink: /modules/pcjs/
+---
+
+IBM PC Emulation Module
+===
+
+Structure
+---
+The PCjs IBM PC Emulation Module divides PC functionality into variety of logical and visual components.
+In general, each JavaScript file is responsible for a single component or set of related components (eg,
+[chipset.js](lib/chipset.js)).  Most components represent familiar PC devices, such as video cards, disk
+controllers, etc.
+
+*Component* is an overloaded term, since **Component** is also the name of the shared base class in
+[component.js](../shared/lib/component.js) used by most machine components.  A few low-level components
+(eg, the **Memory** and **State** components, the Card class of the **Video** component, the Color and Rectangle
+classes of the **Panel** component, etc) do not extend **Component**, so don't assume that every PCjs object has
+access to [component.js](../shared/lib/component.js) methods.
+
+Examples of non-device components include visual components like [panel.js](lib/panel.js) and
+[debugger.js](lib/debugger.js), and sub-components like [x86ops.js](lib/x86ops.js) and [x86func.js](lib/x86func.js),
+which separate the CPU functionality of [x86.js](lib/x86.js) into more manageable pieces.
+
+These components should always be loaded or compiled in the order listed by the *pcJSFiles* property in
+[package.json](../../package.json), which includes all the necessary *shared* components as well.
+At the time of this writing, the recommended order is:
+
+* [shared/defines.js](../shared/lib/defines.js)
+* [shared/diskapi.js](../shared/lib/diskapi.js)
+* [shared/dumpapi.js](../shared/lib/dumpapi.js)
+* [shared/reportapi.js](../shared/lib/reportapi.js)
+* [shared/userapi.js](../shared/lib/userapi.js)
+* [shared/strlib.js](../shared/lib/strlib.js)
+* [shared/usrlib.js](../shared/lib/usrlib.js)
+* [shared/weblib.js](../shared/lib/weblib.js)
+* [shared/component.js](../shared/lib/component.js)
+* [pcjs/defines.js](lib/defines.js)
+* [pcjs/x86.js](lib/x86.js)
+* [pcjs/interrupts.js](lib/interrupts.js)
+* [pcjs/messages.js](lib/messages.js)
+* [pcjs/panel.js](lib/panel.js)
+* [pcjs/bus.js](lib/bus.js)
+* [pcjs/memory.js](lib/memory.js)
+* [pcjs/cpu.js](lib/cpu.js)
+* [pcjs/x86seg.js](lib/x86seg.js)
+* [pcjs/x86cpu.js](lib/x86cpu.js)
+* [pcjs/x86fpu.js](lib/x86fpu.js)
+* [pcjs/x86func.js](lib/x86func.js)
+* [pcjs/x86help.js](lib/x86help.js)
+* [pcjs/x86mods.js](lib/x86mods.js)
+* [pcjs/x86ops.js](lib/x86ops.js)
+* [pcjs/x86op0f.js](lib/x86op0f.js)
+* [pcjs/chipset.js](lib/chipset.js)
+* [pcjs/rom.js](lib/rom.js)
+* [pcjs/ram.js](lib/ram.js)
+* [pcjs/keyboard.js](lib/keyboard.js)
+* [pcjs/video.js](lib/video.js)
+* [pcjs/parallelport.js](lib/parallelport.js)
+* [pcjs/serialport.js](lib/serialport.js)
+* [pcjs/mouse.js](lib/mouse.js)
+* [pcjs/disk.js](lib/disk.js)
+* [pcjs/fdc.js](lib/fdc.js)
+* [pcjs/hdc.js](lib/hdc.js)
+* [pcjs/debugger.js](lib/debugger.js)
+* [pcjs/state.js](lib/state.js)
+* [pcjs/computer.js](lib/computer.js)
+* [shared/embed.js](../shared/lib/embed.js)
+* [shared/save.js](../shared/lib/save.js)
+
+Some of the components *can* be reordered or even omitted (eg, [debugger.js](lib/debugger.js) or
+[embed.js](../shared/lib/embed.js)), but you should observe the following:
+
+* [component.js](../shared/lib/component.js) must be listed before any component that extends **Component**
+* [panel.js](lib/panel.js) should be loaded early to initialize the Control Panel (if any) as soon as possible
+* [computer.js](lib/computer.js) should be the last device component, as it supervises and notifies all the other device components
+
+To minimize ordering requirements, the init() handlers and constructors of all components should avoid
+referencing other components.  Device components should define an initBus() notification handler, which the
+*Computer* component will call after it has created/initialized the *Bus* component.
+
+Features
+---
+
+[List of major existing features goes here]
+
+### BackTrack Support
+
+One major PCjs feature is known as BackTrack Support, or simply BackTracks.  When BackTracks are enabled, every
+memory location (at the byte level) and every general-purpose byte register may have an optional link back to its
+source.  These links are called BackTrack indexes.
+
+All the code that a virtual machine initially executes enters the machine either via ROM or disk sectors, and as that
+code executes, the machine is loading data into registers from memory locations and/or I/O ports and writing the results
+to other memory locations and/or I/O ports.  BackTracks keep track of that data flow, allowing us to examine the history
+of any piece of data at any time, down to the byte level; while this feature could be extended to the bit level, it
+would make the feature dramatically more expensive, both in terms of size and speed.
+
+A BackTrack index is encoded as a 32-bit value with three parts:
+
+- Bits 0-8: 9-bit BackTrack object offset (0-511)
+- Bits 9-15: 7-bit type and access info
+- Bits 16-30: 15-bit BackTrack object number (1-32767, 0 reserved for dynamic data)
+
+This represents a total of 31 bits, with bit 31 reserved.
+
+For example, look at one of the last things a ROM does during boot: loading a disk sector into RAM.  It will be up to the
+disk controller (or DMA controller, if used) to create a BackTrack object representing the sector that was read,
+adding that object to the global BackTrack object array, and then associating the corresponding BackTrack index with
+the first byte of RAM where the sector was loaded.  Subsequent bytes of RAM containing the rest of the sector will refer
+to the same BackTrack object, using BackTrack indexes containing offsets 1-511.
diff --git a/modules/pcjs/lib/README.md b/modules/pcjs/lib/README.md
deleted file mode 100644
index f7f5ed076..000000000
--- a/modules/pcjs/lib/README.md
+++ /dev/null
@@ -1,108 +0,0 @@
-PCjs Sources
-===
-
-Structure
----
-These JavaScript files divide PCjs functionality into major PC components.  Most of the files are device
-components, implementing a specific device (or set of devices, in the case of [chipset.js](chipset.js)).
-
-Be aware that *component* is an overloaded term, since **Component** is also the name of the
-shared base class in [component.js](../../shared/lib/component.js) used by most machine components.
-A few low-level components (eg, the **Memory** and **State** components, the Card class of the **Video**
-component, the Color and Rectangle classes of the **Panel** component, etc) do not extend **Component**,
-so don't assume that every PCjs object has access to [component.js](../../shared/lib/component.js) methods.
-
-Examples of non-device components include UI components like [panel.js](panel.js) and [debugger.js](debugger.js),
-and sub-components like [x86ops.js](x86ops.js) and [x86func.js](x86func.js) that separate the CPU
-functionality of [x86.js](x86.js) into more manageable pieces.
-
-These components should always be loaded or compiled in the order listed by the *pcJSFiles* property in
-[package.json](../../../package.json), which includes all the necessary *shared* components as well.
-At the time of this writing, the recommended order is:
-
-* [shared/defines.js](../../shared/lib/defines.js)
-* [shared/diskapi.js](../../shared/lib/diskapi.js)
-* [shared/dumpapi.js](../../shared/lib/dumpapi.js)
-* [shared/reportapi.js](../../shared/lib/reportapi.js)
-* [shared/userapi.js](../../shared/lib/userapi.js)
-* [shared/strlib.js](../../shared/lib/strlib.js)
-* [shared/usrlib.js](../../shared/lib/usrlib.js)
-* [shared/weblib.js](../../shared/lib/weblib.js)
-* [shared/component.js](../../shared/lib/component.js)
-* [pcjs/defines.js](defines.js)
-* [pcjs/x86.js](x86.js)
-* [pcjs/interrupts.js](interrupts.js)
-* [pcjs/messages.js](messages.js)
-* [pcjs/panel.js](panel.js)
-* [pcjs/bus.js](bus.js)
-* [pcjs/memory.js](memory.js)
-* [pcjs/cpu.js](cpu.js)
-* [pcjs/x86seg.js](x86seg.js)
-* [pcjs/x86cpu.js](x86cpu.js)
-* [pcjs/x86cpu.js](x86fpu.js)
-* [pcjs/x86func.js](x86func.js)
-* [pcjs/x86ops.js](x86ops.js)
-* [pcjs/x86op0f.js](x86op0f.js)
-* [pcjs/x86modb.js](x86modb.js)
-* [pcjs/x86modw.js](x86modw.js)
-* [pcjs/x86modb16.js](x86modb16.js)
-* [pcjs/x86modw16.js](x86modw16.js)
-* [pcjs/x86modb32.js](x86modb32.js)
-* [pcjs/x86modw32.js](x86modw32.js)
-* [pcjs/x86modsib.js](x86modsib.js)
-* [pcjs/chipset.js](chipset.js)
-* [pcjs/rom.js](rom.js)
-* [pcjs/ram.js](ram.js)
-* [pcjs/keyboard.js](keyboard.js)
-* [pcjs/video.js](video.js)
-* [pcjs/serialport.js](serialport.js)
-* [pcjs/mouse.js](mouse.js)
-* [pcjs/disk.js](disk.js)
-* [pcjs/fdc.js](fdc.js)
-* [pcjs/hdc.js](hdc.js)
-* [pcjs/debugger.js](debugger.js)
-* [pcjs/state.js](state.js)
-* [pcjs/computer.js](computer.js)
-* [shared/embed.js](../../shared/lib/embed.js)
-
-Some of the components *can* be reordered or even omitted (eg, [debugger.js](debugger.js) or
-[embed.js](../../shared/lib/embed.js)), but you should observe the following:
-
-* [component.js](../../shared/lib/component.js) must be listed before any component that extends **Component**
-* [panel.js](panel.js) should be loaded early to initialize the Control Panel (if any) as soon as possible
-* [computer.js](computer.js) should be the last device component, as it supervises and notifies all the other device components
-
-To minimize ordering requirements, the init() handlers and constructors of all components should avoid
-referencing other components.  Device components should define an initBus() notification handler, which the
-*Computer* component will call after it has created/initialized the *Bus* component.
-
-Features
----
-
-[List of major existing features goes here]
-
-### BackTrack Support
-
-The next major feature to be implemented is referred to as BackTrack Support, or simply BackTracks.  When BackTracks
-are enabled, every memory location (at the byte level) and every general-purpose byte register may have an optional link
-back to its source.  These links are called BackTrack indexes.
-
-All the code that a virtual machine initially executes enters the machine either via ROM or disk sectors, and as that
-code executes, the machine is loading data into registers from memory locations and/or I/O ports and writing the results
-to other memory locations and/or I/O ports.  BackTracks keep track of that data flow, allowing us to examine the history
-of any piece of data at any time, down to the byte level; while this feature could be extended to the bit level, it
-would make the feature dramatically more expensive, both in terms of size and speed.
-
-A BackTrack index is encoded as a 32-bit value with three parts:
-
-- Bits 0-8: 9-bit BackTrack object offset (0-511)
-- Bits 9-15: 7-bit type and access info
-- Bits 16-30: 15-bit BackTrack object number (1-32767, 0 reserved for dynamic data)
-
-This represents a total of 31 bits, with bit 31 reserved.
-
-For example, look at one of the last things a ROM does during boot: loading a disk sector into RAM.  It will be up to the
-disk controller (or DMA controller, if used) to create a BackTrack object representing the sector that was read,
-adding that object to the global BackTrack object array, and then associating the corresponding BackTrack index with
-the first byte of RAM where the sector was loaded.  Subsequent bytes of RAM containing the rest of the sector will refer
-to the same BackTrack object, using BackTrack indexes containing offsets 1-511.
diff --git a/modules/pcjs/lib/computer.js b/modules/pcjs/lib/computer.js
index 549f5301f..482424222 100644
--- a/modules/pcjs/lib/computer.js
+++ b/modules/pcjs/lib/computer.js
@@ -394,7 +394,7 @@ Computer.prototype.getMachineParm = function(sParm, parmsComponent)
      * but there are limits to my paranoia.
      */
     var sParmLC = sParm.toLowerCase();
-    var value = Component.parmsURL && (Component.parmsURL[sParm] || Component.parmsURL[sParmLC]);
+    var value = Component.parmsURL[sParm] || Component.parmsURL[sParmLC];
 
     if (value === undefined && this.parmsMachine) {
         value = this.parmsMachine[sParm];
diff --git a/modules/pcjs/lib/video.js b/modules/pcjs/lib/video.js
index 2ae46e649..59a9d4926 100644
--- a/modules/pcjs/lib/video.js
+++ b/modules/pcjs/lib/video.js
@@ -7260,7 +7260,10 @@ Video.init = function()
          *
          * HACK: A canvas style of "auto" provides for excellent responsive canvas scaling in EVERY browser
          * except IE9/IE10, so I recalculate the appropriate CSS height every time the parent DIV is resized;
-         * IE11 works without this hack, so we take advantage of the fact that IE11 doesn't report itself as "MSIE".
+         * IE11 works without this hack, so we take advantage of the fact that IE11 doesn't identify as "MSIE".
+         *
+         * The other reason it's good to keep this particular hack limited to IE9/IE10 is that most other
+         * browsers don't actually support an 'onresize' handler on anything but the window object.
          */
         eCanvas.style.height = "auto";
         if (web.getUserAgent().indexOf("MSIE") >= 0) {
@@ -7271,6 +7274,33 @@ Video.init = function()
             }(eVideo, eCanvas, parmsVideo['screenWidth'], parmsVideo['screenHeight']);
             eVideo.onresize();
         }
+        /*
+         * The following is a related hack that allows the user to force the machine to use a particular aspect
+         * ratio if an 'aspect' URL parameter is set.  Initially, it's just for testing purposes until we figure
+         * out a better UI.  And note that we use our web.onPageEvent() helper function to make sure we don't
+         * trample on any other 'onresize' handler(s) attached to the window object.
+         */
+        var aspect = +Component.parmsURL['aspect'];
+        if (aspect) {
+            web.onPageEvent('onresize', function(eParent, eChild, aspectRatio) {
+                return function onResizeWindow() {
+                    /*
+                     * Since aspectRatio is the target width/height, we have:
+                     *
+                     *      eParent.clientWidth / eChild.style.height = aspectRatio
+                     *
+                     * which means that:
+                     *
+                     *      eChild.style.height = eParent.clientWidth / aspectRatio
+                     *
+                     * so for example, if aspectRatio is 16:9, or 1.78, and clientWidth = 640,
+                     * then the calculated height should approximately 360.
+                     */
+                    eChild.style.height = ((eParent.clientWidth / aspectRatio)|0) + "px";
+                };
+            }(eVideo, eCanvas, aspect));
+            window['onresize']();
+        }
         eVideo.appendChild(eCanvas);
 
         /*
diff --git a/modules/shared/lib/component.js b/modules/shared/lib/component.js
index f507dbed7..ec5021ba8 100644
--- a/modules/shared/lib/component.js
+++ b/modules/shared/lib/component.js
@@ -143,7 +143,7 @@ function Component(type, parms, constructor, bitsMessage)
  *
  * Initialized to the set of URL parameters, if any, for the current web page.
  *
- * @type {Object|null}
+ * @type {Object}
  */
 Component.parmsURL = web.getURLParameters();
 
diff --git a/modules/shared/lib/weblib.js b/modules/shared/lib/weblib.js
index 57f24c444..168b61af4 100644
--- a/modules/shared/lib/weblib.js
+++ b/modules/shared/lib/weblib.js
@@ -750,7 +750,7 @@ web.fPageEventsEnabled = true;
  * @param {string} sFunc
  * @param {function()} fn
  *
- * Use this instead of setting window['onunload'], window['onunload'], etc.
+ * Use this instead of setting window['onload'], window['onunload'], etc.
  * Allows multiple JavaScript modules to define a handler for the same event.
  *
  * Moreover, it's risky to refer to obscure event handlers with "dot" names, because
diff --git a/versions/c1pjs/1.21.4/c1p-dbg.js b/versions/c1pjs/1.21.4/c1p-dbg.js
index 70b4c35ce..ff1e3024f 100644
--- a/versions/c1pjs/1.21.4/c1p-dbg.js
+++ b/versions/c1pjs/1.21.4/c1p-dbg.js
@@ -1,7 +1,7 @@
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+function u(a){window&&window.alert(a)}function v(a){if(window){var b=window?window.navigator.userAgent:"";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 fa(a,b,c){function d(){--a;0<=a&&(b()||(a=0));0<a?setTimeout(d,0):c()}d()}
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diff --git a/versions/c1pjs/1.21.4/c1p.js b/versions/c1pjs/1.21.4/c1p.js
index ae975f54c..6768d1dbc 100644
--- a/versions/c1pjs/1.21.4/c1p.js
+++ b/versions/c1pjs/1.21.4/c1p.js
@@ -1,7 +1,7 @@
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 function da(a){return a.replace(/[&<>"']/g,function(a){return ca[a]})}var q=Date.now||function(){return+new Date};
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+function r(a,b){var c=0,d=null;if("object"==typeof resources&&(d=resources[a]))b&&b(a,d,c);else if("function"==typeof resources)resources(a,function(c,d){b&&b(a,c,d)});else{var f=window.XMLHttpRequest?new window.XMLHttpRequest:new window.ActiveXObject("Microsoft.XMLHTTP");f.onreadystatechange=function(){4===f.readyState&&(d=f.responseText,200==f.status||!f.status&&d.length&&"file:"==(window?window.location.protocol:"file:")||(c=f.status||-1),b&&b(a,d,c))};f.open("GET",a,!0);f.send()}}
+function t(a){window&&window.alert(a)}function v(a){if(window){var b=window?window.navigator.userAgent:"";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}var w={init:[],show:[],exit:[]},ea=!1,x=!0;function fa(a,b){if(window){var c=window[a];window[a]="function"!==typeof c?b:function(){c&&c();b()}}}function y(a){w.init.push(a)}
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diff --git a/versions/pcjs/1.21.4/pc-dbg.js b/versions/pcjs/1.21.4/pc-dbg.js
index 5e82cd4d0..a4211aeb0 100644
--- a/versions/pcjs/1.21.4/pc-dbg.js
+++ b/versions/pcjs/1.21.4/pc-dbg.js
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 case 720:g.Bb=80;g.lb=9;break;case 1200:g.Bb=80;g.lb=15;break;case 1440:g.Bb=80,g.lb=18}}var k=a,l=d,n=f[d],q=0;h=!0;g.hb=l;g.bd=g.$e=!1;void 0===n&&(n=[192,!0,0,2,0]);"boolean"==typeof n[1]&&(n[1]=["Floppy Drive",g.Bb||40,g.ub||n[3],g.lb||9,g.Va||512,n[1],g.yg,g.Nf,g.Of]);g.Cb=n[q++];var p=n[q++];g.name=p[0];g.Bb=p[1];g.ub=p[2];g.lb=p[3];g.Va=p[4];g.bf=p[5];(g.yg=p[6])?(g.Nf=p[7],g.Of=p[8]):(g.yg=g.Bb,g.Nf=g.ub,g.Of=g.lb);g.kb=n[q++];g.ge=n[q++];g.Rb=n[q++];g.ge=100<=g.ge?g.ge-100:g.ge-g.Rb;g.xb=
 n[q++];g.he=n[q++];g.Hb=n[q++];g.eb=n[q++];g.pb=null;g.za||(g.Le="");p=n[q++];102==p&&(p=!1);if("boolean"==typeof p){var z=p,p=n[q++],n=n[q];z?(q=p,p=k.A[l],zp(k,l,!0,!0),p.$e=!0,l=new Ho(k,p,"preload"),k.Hi(p,l,q,n,!0)):Bp(k,l,p,n,!0)?g.za&&n&&Cp(k,p,n,g.za):rb(k,!1)}else void 0!==p&&g.za&&0>g.za.restore(p)&&(h=!1);h&&g.za&&void 0!==g.eb&&(g.pb=g.za.seek(g.Rb,g.kb,g.xb));h||(e=!1)}a.X=b[c++]||0;a.kc=b[c]||0;return e}m.Gi=function(a){var b;a=this.A[a];if(void 0!==a){b={};for(var c in a)b[c]=a[c]}return b};
-m.kk=function(a,b,c){if(a.za){var d=a.za.info(),e=d[2],f=d[1]*e;if(b+c<=d[0]*f)return a.Rb=Math.floor(b/f),b%=f,a.kb=Math.floor(b/e),a.xb=b%e+1,a.Hb=c*d[3],a.Cb=0,!0}return!1};
-function yp(a,b){b||(a.fa=0);if(a.U)for(var c in a.U){var d=a.U[c],e=d.path,f;if(!(f=d.name))a:{if((f=a.qa.listDisks)&&f.options)for(var g=0;g<f.options.length;g++)if(f.options[g].value==e){f=f.options[g].innerText;break a}f=fa(e,!0)}if(e&&f&&(g=c.charCodeAt(0)-65,0<=g&&g<a.A.length)){!Bp(a,g,f,e,!0)&&b&&rb(a,!1);continue}a.Oa("Incorrect auto-mount settings for drive "+c+" ("+JSON.stringify(d)+")")}return!!a.fa}
+m.lk=function(a,b,c){if(a.za){var d=a.za.info(),e=d[2],f=d[1]*e;if(b+c<=d[0]*f)return a.Rb=Math.floor(b/f),b%=f,a.kb=Math.floor(b/e),a.xb=b%e+1,a.Hb=c*d[3],a.Cb=0,!0}return!1};
+function yp(a,b){b||(a.fa=0);if(a.U)for(var c in a.U){var d=a.U[c],e=d.path,f;if(!(f=d.name))a:{if((f=a.qa.listDisks)&&f.options)for(var g=0;g<f.options.length;g++){var h=f.options[g];if(h.value==e){f=h.textContent;break a}}f=fa(e,!0)}if(e&&f&&(g=c.charCodeAt(0)-65,0<=g&&g<a.A.length)){!Bp(a,g,f,e,!0)&&b&&rb(a,!1);continue}a.Oa("Incorrect auto-mount settings for drive "+c+" ("+JSON.stringify(d)+")")}return!!a.fa}
 function tp(a,b,c,d){var e,f=a.qa.listDrives;if(f&&!isNaN(e=ca(f.value,10))&&0<=e&&e<a.A.length)if(c)if("?"==c)a.Oa('Use "Choose File" and "Mount" to select and load a local disk.');else{if("??"==c){c=window.prompt("Enter the URL of a remote disk image.","")||"";if(!c)return;b=fa(c)}for(;0>Bp(a,e,b,c,!1,d)&&window.confirm("Click OK to reload the original disk.\n(WARNING: All disk changes will be discarded)");){for(var f=a,g=c,h=void 0,h=0;h<f.B.length;h++)if(f.B[h][1]==g){f.B.splice(h,1);break}zp(a,
 e,!1,!0)}}else zp(a,e);else a.Oa("Unable to load the selected drive")}function Bp(a,b,c,d,e,f){var g=a.A[b];if(d&&g.Le!=d){zp(a,b,e,!0);if(g.bd)return a.Oa("Drive "+b+" busy"),0;g.bd=!0;e&&(g.Ae=!0,a.fa++,A(a)&&y(a,"loading diskette '"+c+"'"));g.$e=!!f;return(new Ho(a,g,"preload")).load(c,d,f,a.Hi)?1:0}return-1}
-m.Hi=function(a,b,c,d,e){var f;a.bd=!1;b&&(f=b.info(),b&&f[0]>a.Bb||f[1]>a.ub)&&(this.Oa('Diskette "'+c+'" too large for drive '+String.fromCharCode(65+a.hb)),b=null);b?(a.za=b,a.jk=c,a.Le=d,Cp(this,c,d,b),f=b.info(),this.X|=128,this.Oa('Mounted diskette "'+c+'" in drive '+String.fromCharCode(65+a.hb),a.Ae||e),a.yg=f[0],a.Nf=f[1],a.Of=f[2],this.V&&this.V.yd()):a.$e=!1;a.Ae&&(a.Ae=!1,--this.fa||rb(this));sp(this,a.hb)};
+m.Hi=function(a,b,c,d,e){var f;a.bd=!1;b&&(f=b.info(),b&&f[0]>a.Bb||f[1]>a.ub)&&(this.Oa('Diskette "'+c+'" too large for drive '+String.fromCharCode(65+a.hb)),b=null);b?(a.za=b,a.kk=c,a.Le=d,Cp(this,c,d,b),f=b.info(),this.X|=128,this.Oa('Mounted diskette "'+c+'" in drive '+String.fromCharCode(65+a.hb),a.Ae||e),a.yg=f[0],a.Nf=f[1],a.Of=f[2],this.V&&this.V.yd()):a.$e=!1;a.Ae&&(a.Ae=!1,--this.fa||rb(this));sp(this,a.hb)};
 function xp(a,b,c){if((a=a.qa.listDisks)&&a.options){for(var d=0;d<a.options.length;d++)if(a.options[d].value==c)return;d=document.createElement("option");d.value=c;d.textContent=b;a.appendChild(d)}}
-function sp(a,b){if(0<=b&&b<a.A.length){var c=a.A[b],d=a.qa.listDisks,e=a.qa.listDrives;if(d&&e&&d.options&&e.options&&(e=ca(e.value,10),c=c.$e?"?":c.Le,!isNaN(e)&&e==b)){for(e=0;e<d.options.length;e++)if(d.options[e].value==c){d.selectedIndex!=e&&(d.selectedIndex=e);break}e==d.options.length&&(d.selectedIndex=0)}}}function zp(a,b,c,d){var e=a.A[b];e.za&&(Ap(a,e.Le,e.za),e.jk="",e.Le="",e.za=null,e.$e=!1,a.X|=128,d||a.Oa("Drive "+String.fromCharCode(65+b)+" unloaded",c),c||d||sp(a,b))}
+function sp(a,b){if(0<=b&&b<a.A.length){var c=a.A[b],d=a.qa.listDisks,e=a.qa.listDrives;if(d&&e&&d.options&&e.options&&(e=ca(e.value,10),c=c.$e?"?":c.Le,!isNaN(e)&&e==b)){for(e=0;e<d.options.length;e++)if(d.options[e].value==c){d.selectedIndex!=e&&(d.selectedIndex=e);break}e==d.options.length&&(d.selectedIndex=0)}}}function zp(a,b,c,d){var e=a.A[b];e.za&&(Ap(a,e.Le,e.za),e.kk="",e.Le="",e.za=null,e.$e=!1,a.X|=128,d||a.Oa("Drive "+String.fromCharCode(65+b)+" unloaded",c),c||d||sp(a,b))}
 function Cp(a,b,c,d){var e;for(e=0;e<a.B.length;e++)if(a.B[e][1]==c){d.restore(a.B[e][2]);return}a.B[e]=[b,c,[]]}function Ap(a,b,c){var d;for(d=0;d<a.B.length;d++)if(a.B[d][1]==b){a.B[d][2]=c.save();break}}m.Qm=function(a,b,c){x(this,a,b,c,"OUTPUT");b&4?this.aa&4||this.aa&8&&this.N&&eg(this.N,6):up(this);this.aa=b};m.vl=function(a,b){x(this,a,null,b,"DIAG",80);return 80};m.xl=function(a,b){x(this,a,null,b,"STATUS",this.ma);return this.ma};
 m.ul=function(a,b){var c=0;this.L<this.C&&(c=this.W[this.L]);this.aa&8&&this.N&&dg(this.N,6);A(this)&&x(this,a,null,b,"DATA["+this.L+"]",c);++this.L>=this.C&&(this.ma&=-81,this.L=this.C=0);return c};
 m.Pm=function(a,b,c){A(this)&&x(this,a,b,c,"DATA["+this.C+"]");this.C<this.W.length&&(this.W[this.C++]=b);a=this.W[0]&31;if(void 0!==rp[a]&&this.C>=rp[a].Vd){b=!1;this.L=0;a=Dp(this);var d,e,f,g,h=a&31;switch(h){case 3:Dp(this);Dp(this);Ep(this);break;case 4:c=Dp(this);this.hb=c&3;d=this.A[this.hb];Ep(this);Fp(this,(d.Cb&-16777216)>>>24);break;case 5:case 6:c=Dp(this);b=c>>2&1;this.hb=c&3;d=this.A[this.hb];d.kb=b;c=d.Rb=Dp(this);e=Dp(this);f=d.xb=Dp(this);g=Dp(this);d.Hb=128<<g;d.he=Dp(this);Dp(this);
@@ -627,14 +627,14 @@ var Kp=["XTC","ATC","COMPAQ"],Lp=[{0:[306,2],1:[375,8],2:[306,6],3:[306,4]},{1:[
 8],20:[733,5],21:[733,7],22:[524,4,40],23:[924,8],24:[966,14],25:[966,16],26:[1023,14],27:[832,6,33],28:[1222,15,34],29:[1240,7,34],30:[615,4,25],31:[615,8,25],32:[905,9,25],33:[832,8,33],34:[966,7,34],35:[966,8,34],36:[966,9,34],37:[966,5,34],38:[612,16,63],39:[1023,11,33],40:[1023,15,34],41:[1630,15,52],42:[1023,16,63],43:[805,4,26],44:[805,2,26],45:[748,8,33],46:[748,6,33],47:[966,5,25]}];m=Jp.prototype;m.Qb=function(){return!1};
 m.Ic=function(a,b,c,d){this.ea=b;this.F=c;this.ha=d;this.V=a;if(d=Nc(a,"drives"))this.ua=d;else if(this.Fa)try{this.ua=eval("("+this.Fa+")")}catch(e){w("HDC drive configuration error: "+e.message+" ("+this.Fa+")")}this.N=Eb(a,"ChipSet");this.U=0;this.Ia=3;hc(b,this,this.ja?Mp:Np);lc(b,this,this.ja?Op:Pp);this.ja&&(this.U++,this.N&&5180==this.N.ia&&this.U++,this.Ia=2,b.aa[496]=2,b.fa[496]=2);cf(c,19,this.Zl.bind(this));cf(c,64,this.$l.bind(this));this.reset();Qp(this)||rb(this)};
 m.ic=function(a,b){if(!b)if(!a||!this.restore)Rp(this),this.V.bh&&Qp(this,!0);else if(!this.restore(a))return!1;return!0};m.hc=function(a){return a?this.save():!0};m.ff=function(){return this.V?this.V.ff():""};m.ke=function(){return this.V?this.V.ke():""};m.reset=function(){Rp(this,null,!0)};
-m.save=function(){var a=new hf(this),b=0,c=[];this.ja?(c[b++]=this.X,c[b++]=this.Pa,c[b++]=this.aa,c[b++]=this.Ca,c[b++]=this.ya,c[b++]=this.wa,c[b++]=this.ra,c[b++]=this.ma,c[b++]=this.Ea,c[b++]=[this.ga,this.hb]):(c[b++]=this.pa,c[b++]=this.ma,c[b++]=this.W,c[b++]=this.L,c[b++]=this.C,c[b++]=this.Na,c[b++]=this.Ka,c[b++]=this.Ja,c[b++]=this.ka);for(var d=0,e=[],f=0;f<this.A.length;f++){var g=d++,h=this.A[f],k=0,l=[];l[k++]=h.errorCode;l[k++]=h.lk;l[k++]=h.bf;l[k++]=h.Qe;l[k++]=h.Re;l[k++]=h.kb;
+m.save=function(){var a=new hf(this),b=0,c=[];this.ja?(c[b++]=this.X,c[b++]=this.Pa,c[b++]=this.aa,c[b++]=this.Ca,c[b++]=this.ya,c[b++]=this.wa,c[b++]=this.ra,c[b++]=this.ma,c[b++]=this.Ea,c[b++]=[this.ga,this.hb]):(c[b++]=this.pa,c[b++]=this.ma,c[b++]=this.W,c[b++]=this.L,c[b++]=this.C,c[b++]=this.Na,c[b++]=this.Ka,c[b++]=this.Ja,c[b++]=this.ka);for(var d=0,e=[],f=0;f<this.A.length;f++){var g=d++,h=this.A[f],k=0,l=[];l[k++]=h.errorCode;l[k++]=h.mk;l[k++]=h.bf;l[k++]=h.Qe;l[k++]=h.Re;l[k++]=h.kb;
 l[k++]=h.ub;l[k++]=h.de;l[k++]=h.xb;l[k++]=h.he;l[k++]=h.Hb;l[k++]=h.eb;l[k]=h.za?h.za.save():null;e[g]=l}c[b]=e;N(a,0,c);return a.data()};m.restore=function(a){return Rp(this,a[0])};
 function Rp(a,b,c){var d=0,e=!0;a.hb=-1;if(a.ja){if(null==b&&(b=[0,0,0,0,0,0,0,64,0,[0,-1]]),a.X=b[d++],a.Pa=b[d++],a.aa=b[d++],a.Ca=b[d++],a.ya=b[d++],a.wa=b[d++],a.ra=b[d++],a.ma=b[d++],a.Ea=b[d++],a.ga=b[d++],"object"==typeof a.ga){var f=a.ga;a.ga=f[0];a.hb=f[1]}}else null==b&&(b=[0,0,Array(14),0,0]),a.pa=b[d++],a.ma=b[d++],a.W=b[d++],a.L=b[d++],a.C=b[d++],a.Na=b[d++],a.Ka=b[d++],a.Ja=b[d++],f=b[d++],void 0!==f?a.ka=f:void 0===a.ka&&(a.ka=-1);void 0===a.A&&(a.A=Array(a.ua.length));b=b[d];void 0===
-b&&(b=[]);for(d=0;d<a.A.length;d++){void 0===a.A[d]&&(a.A[d]={});var f=a.A[d],g=a,h=d,k=f,l=a.ua[d],n=b[d],q=c,p=0,z=!0;void 0===n&&(n=[0,0,!1,Array(8)]);k.hb=h;k.errorCode=n[p++];k.lk=n[p++];k.bf=n[p++];k.Qe=n[p++];k.Re=n[p++];k.kb=n[p++];k.ub=n[p++];k.de=n[p++];k.xb=n[p++];k.he=n[p++];k.Hb=n[p++];k.lg=g.ja?0:1;k.name=l.name;void 0===k.name&&(k.name="Hard Drive");k.path=l.path;k.mode=l.mode||(k.path?"preload":"local");"demandro"!=k.mode&&"demandrw"!=k.mode||g.ke()||(k.mode="local");k.type=l.type;
+b&&(b=[]);for(d=0;d<a.A.length;d++){void 0===a.A[d]&&(a.A[d]={});var f=a.A[d],g=a,h=d,k=f,l=a.ua[d],n=b[d],q=c,p=0,z=!0;void 0===n&&(n=[0,0,!1,Array(8)]);k.hb=h;k.errorCode=n[p++];k.mk=n[p++];k.bf=n[p++];k.Qe=n[p++];k.Re=n[p++];k.kb=n[p++];k.ub=n[p++];k.de=n[p++];k.xb=n[p++];k.he=n[p++];k.Hb=n[p++];k.lg=g.ja?0:1;k.name=l.name;void 0===k.name&&(k.name="Hard Drive");k.path=l.path;k.mode=l.mode||(k.path?"preload":"local");"demandro"!=k.mode&&"demandrw"!=k.mode||g.ke()||(k.mode="local");k.type=l.type;
 if(void 0===k.type||void 0===Lp[g.U][k.type])k.type=g.Ia;l=Lp[g.U][k.type];k.lb=l[2]||17;k.Va=l[3]||512;if(q&&g.N){var F=g.N,v=k.type;if(F.A){var q=null,l=void 0,E=F.A[18];15<v&&(q=v,v=15);h?(E=E&240|v,l=26):(E=E&15|v<<4,l=25);v=F;v.A&&(v.A[18]=E,Xk(v));null!=q&&F.A&&(F.A[l]=q,Xk(F))}}void 0===k.za&&(k.za=null,g.Oa("Type "+k.type+' "'+k.name+'" is fixed disk '+h,!0));Sp(g,k);k.eb=n[p++];k.pb=null;k.za&&(g=n[p],void 0!==g&&0>k.za.restore(g)&&(z=!1),z&&void 0!==k.eb&&(k.pb=k.za.seek(k.de,k.kb,k.xb+
 k.lg)));z||(e=!1);null!=a.pa&&1>=d&&(a.pa|=(f.type&3)<<(1-d<<1))}0<=a.hb&&(a.B=a.A[a.hb]);return e}m.Gi=function(a){var b;a=this.A[a];if(void 0!==a){b={};for(var c in a)b[c]=a[c]}return b};
 function Sp(a,b,c){if(b){var d=0,e=0;null==c&&((d=b.Qe[2])?e=b.Qe[0]<<8|b.Qe[1]:c=b.type);null==c||d||(d=Lp[a.U][c][1],e=Lp[a.U][c][0]);d&&((c=Lp[a.U][b.type])&&e!=c[0]&&d!=c[1]&&a.Oa("Warning: drive parameters ("+e+","+d+") do not match drive type "+b.type+" ("+c[0]+","+c[1]+")"),b.Bb=e,b.ub=d,null==b.za&&(b.za=new Ho(a,b,b.mode)))}}
-m.kk=function(a,b,c){if(a.za){var d=a.za.info(),e=d[0];if(e){var f=d[2],g=d[1]*f;if(b+c<=e*g)return a.de=Math.floor(b/g),b%=g,a.kb=Math.floor(b/f),a.xb=b%f,a.Hb=c*d[3],a.errorCode=0,!0}}return!1};
+m.lk=function(a,b,c){if(a.za){var d=a.za.info(),e=d[0];if(e){var f=d[2],g=d[1]*f;if(b+c<=e*g)return a.de=Math.floor(b/g),b%=g,a.kb=Math.floor(b/f),a.xb=b%f,a.Hb=c*d[3],a.errorCode=0,!0}}return!1};
 function Qp(a,b){b||(a.fa=0);for(var c=0;c<a.A.length;c++){var d=a.A[c];if(d.name&&d.path){if(!(b&&d.za&&d.za.qg)){var e;e=a;var f=d.name,d=d.path,g=e.A[c];g.bd?(e.Oa("Drive "+c+" busy"),e=!0):(g.bd=!0,g.Ae=!0,e.fa++,A(e)&&y(e,"loading "+f),(g.za||new Ho(e,g,g.mode)).load(f,d,null,e.Ok),e=!1);!e&&b&&rb(a,!1)}}else b&&void 0!==d.type&&(d.za=null,Sp(a,d,d.type))}return!!a.fa}
 m.Ok=function(a,b,c){a.bd=!1;if(a.za=b)this.Oa('Mounted disk "'+c+'" in drive '+String.fromCharCode(67+a.hb),a.Ae),b=b.info(),b[0]==a.Bb&&b[1]==a.ub&&b[2]==a.lb&&b[3]==a.Va||this.Oa("Warning: disk geometry ("+b[0]+":"+b[1]+":"+b[2]+") does not match "+Kp[this.U]+" drive type "+a.type+" ("+a.Bb+":"+a.ub+":"+a.lb+")");a.Ae&&(a.Ae=!1,--this.fa||rb(this))};
 m.Xl=function(a,b){var c=0;this.L<this.C&&(c=this.W[this.L]);this.N&&dg(this.N,5);this.ma&=-33;x(this,a,null,b,"DATA["+this.L+"]",c);++this.L>=this.C&&(this.L=this.C=0,this.ma&=-15);return c};m.nn=function(a,b,c){x(this,a,b,c,"DATA["+this.C+"]");this.C<this.W.length&&(this.W[this.C++]=b);a=12!=this.W[0]?6:this.W.length;6==this.C&&(this.ma&=-2);this.C>=a&&(this.ma|=2,this.ma&=-2,Tp(this))};m.Yl=function(a,b){var c=this.ma;x(this,a,null,b,"STATUS",c);this.L<this.C&&(this.ma|=1);return c};
@@ -645,7 +645,7 @@ m.zm=function(a,b,c){x(this,a,b,c,"SECCNT");this.aa=b};m.gl=function(a,b){var c=
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@@ -764,30 +764,30 @@ a.O(Vb))}else if("symbols"==ja)for(var wa=0;wa<a.B.length;wa++){var Vd=a.B[wa],R
 a.ea,Da={};Da.bk=(Te&-4194304)>>>20;Da.ui=a.F.Pd+Da.bk;Da.yb=ce.sa[(Da.ui&ce.Gb)>>>ce.La];Da.Ui=Da.yb.Nd(Da.bk);Da.ck=(Te&4190208)>>>10;Da.vi=(Da.Ui&-4096)+Da.ck;Da.zb=ce.sa[(Da.vi&ce.Gb)>>>ce.La];Da.Vi=Da.zb.Nd(Da.ck);Da.Fk=(Da.Vi&-4096)+(Te&4095)}if(be=Da){a.O("linear     PDE addr   PDE             PTE addr   PTE             physical");a.O("---------  ---------- --------        ---------- --------        ----------");var qd="%"+r(Te),qd=qd+("  %%"+cr(be.ui,be.Ui)),qd=qd+("  %%"+cr(be.vi,be.Vi,!0)),
 qd=qd+("  %%"+r(be.Fk));a.O(qd)}else a.O("unsupported operation")}}else a.O("missing address")}else{if("d"==ia){if("disk"==ja){P[0]="l";P[1]="json";Ir(a,P);break a}for(bb in vq)if(P[1]==bb){var Dn=a.$a[bb];Dn?(P.shift(),P.shift(),Dn(P)):a.O("no dump registered for "+ja);break a}ja||(ia=a.Cc||"db")}else a.Cc=ia;if("dh"==ia){var En=ja,Fn=Ha,Gn="",Hn=0,tb=a.Fa,tc=a.ja;if(tc.length){var Db=+En||a.Ub,de=+Fn||10;isNaN(Db)?Db=de:Gn="more ";Db>tc.length&&(a.O("note: only "+tc.length+" available"),Db=tc.length);
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-var ji=P[0];if(ji){var Ve=Dq(a,ji);if(void 0===Ve||0>Ve||255<Ve)a.O("invalid vector: "+ji);else{var Jn="&",Kn=!!(a.F.Za&1),Ln=!1,og=a.F.Mc+(Ve<<(Kn?3:2)),ki=a.F.na(og+0),gs=a.F.na(og+2);Kn&&(Jn="#",a.F.na(og+4)&2048&&(Ln=!0,ki|=a.F.na(og+6)<<16));a.O("dumpIDT("+u(Ve)+"): "+Jn+r(gs,4)+":"+r(ki,Ln?8:4))}}else a.O("no IDT vector")}else if("dt"==ia)P.shift(),a.O("no information");else{var ee=Yq(a,ja);if(ee&&(null!=ee.Z||null!=ee.Da)){var pg=0;Ha&&("l"==Ha.charAt(0)&&(Ha=Ha.substr(1)||Xa),pg=Dq(a,Ha)>>>
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+var ji=P[0];if(ji){var Ve=Dq(a,ji);if(void 0===Ve||0>Ve||255<Ve)a.O("invalid vector: "+ji);else{var Jn="&",Kn=!!(a.F.Za&1),Ln=!1,pg=a.F.Mc+(Ve<<(Kn?3:2)),ki=a.F.na(pg+0),gs=a.F.na(pg+2);Kn&&(Jn="#",a.F.na(pg+4)&2048&&(Ln=!0,ki|=a.F.na(pg+6)<<16));a.O("dumpIDT("+u(Ve)+"): "+Jn+r(gs,4)+":"+r(ki,Ln?8:4))}}else a.O("no IDT vector")}else if("dt"==ia)P.shift(),a.O("no information");else{var ee=Yq(a,ja);if(ee&&(null!=ee.Z||null!=ee.Da)){var qg=0;Ha&&("l"==Ha.charAt(0)&&(Ha=Ha.substr(1)||Xa),qg=Dq(a,Ha)>>>
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+if(null==Rn)a.O("edit memory commands:"),a.O("\teb [a] [...]  edit bytes at address a"),a.O("\tew [a] [...]  edit words at address a");else{var ug=Yq(a,Rn);if(ug)for(var vg=2;vg<g.length;vg++){var Xe=$q(a,g[vg]);if(void 0===Xe){a.O("unrecognized value: "+g[vg]);break}Xe&~Nn&&a.O("warning: "+r(Xe)+" exceeds "+tg+"-byte value");var is=On.call(a,ug);a.O("changing "+Rq(ug)+" from 0x"+r(is,Qn)+" to 0x"+r(Xe,Qn));Pn.call(a,ug,Xe,tg)}}break;case "f":Fr(a,g[1]);break;case "g":a:{var Sn=g[1],js=b;"gt"==g[0]&&
+(a.cb=!0);if(void 0!==Sn){var pi=Yq(a,Sn,!0);if(!pi)break a;ar(a,pi,js);a.Sd(a.A,pi,!0)}a.Ke(!0)||c||a.O("cpu busy or unavailable, run command ignored")}break;case "h":var qi;a.la.Ib?(qi="halting",a.Wb()):qi="already halted";c||a.O(qi);break;case "i":if("if"==g[0]){var ri;var Ye=b.substr(2),Ye=na(Ye);$q(a,Ye)?(c||a.O("true: "+Ye),ri=!0):(c||a.O("false: "+Ye),ri=!1);ri||(d=!1);break}if("int"==g[0]){var wg;a:switch(Dq(a,g[1])){case 19:kk(a,19,a.F.Ga,!0);a.ya=a.pa;wg=!0;break a;case 33:kk(a,33,a.F.Ga,
+!0);a.ya=a.pa;wg=!0;break a;default:wg=!1}wg||(d=!1);break}var si=g[1];if(si&&"?"!=si){var ti=Dq(a,si);if(void 0!==ti){var ks=ic(a.ea,ti,1);a.O(u(ti)+": "+t(ks))}}else a.O("input commands:"),a.O("\ti [p]\tread port [p]"),a.O("warning: port accesses can affect hardware state");break;case "k":var ls=g[0];if("?"==g[1])a.O("stack trace commands:"),a.O("\tk\tshow frame addresses"),a.O("\tks\tshow symbol information");else{var ui=0,Tn=a.F.va.Z,Ze=hq(a),Tc=hq(a,I(a.F),a.F.ta.Z);for(a.O("stack trace for "+
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-g[1],wg=g[2];if(a.W){var Wn=1;"-"==wg.charAt(0)&&(Wn=-1,wg=wg.substr(1));var td=Dq(a,wg,vi);if(void 0!==td)switch(td=td*Wn|0,vi){case "x":a.W.Hf(td,0);break;case "y":a.W.Hf(0,td);break;case "click":a.W.je(td,!0);a.W.je(td,!1);break;default:a.O("unknown action: "+vi)}}else a.O("no mouse");break}a:{var vc,wc=null,Oa=g[1];"?"==Oa&&(Oa=void 0);if(void 0!==Oa){var ud=0;if("all"==Oa)ud=1610481663,Oa=null;else if("on"==Oa)wc=!0,Oa=null;else if("off"==Oa)wc=!1,Oa=null;else{"keys"==Oa&&(Oa="key");"kbd"==Oa&&
+g[1],xg=g[2];if(a.W){var Wn=1;"-"==xg.charAt(0)&&(Wn=-1,xg=xg.substr(1));var td=Dq(a,xg,vi);if(void 0!==td)switch(td=td*Wn|0,vi){case "x":a.W.Hf(td,0);break;case "y":a.W.Hf(0,td);break;case "click":a.W.je(td,!0);a.W.je(td,!1);break;default:a.O("unknown action: "+vi)}}else a.O("no mouse");break}a:{var vc,wc=null,Oa=g[1];"?"==Oa&&(Oa=void 0);if(void 0!==Oa){var ud=0;if("all"==Oa)ud=1610481663,Oa=null;else if("on"==Oa)wc=!0,Oa=null;else if("off"==Oa)wc=!1,Oa=null;else{"keys"==Oa&&(Oa="key");"kbd"==Oa&&
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-(Uc||"none"));jq(a)}break;case "o":var wi=g[1],ps=g[2];if(wi&&"?"!=wi){var xi=Dq(a,wi,"port #"),yi=Dq(a,ps);void 0!==xi&&void 0!==yi&&(mc(a.ea,xi,1,yi),a.O(u(xi)+": "+t(yi)))}else a.O("output commands:"),a.O("\to [p] [b]\twrite byte [b] to port [p]"),a.O("warning: port accesses can affect hardware state");break;case "p":if("print"==g[0]){Jr(a,b.substr(5));break}var Xn="pr"==g[0]?1:0,fe=1+Xn;if(a.N)a.O("step in progress");else{var xg,Yn=!1,lb=hq(a,K(a.F),a.F.va.Z);do switch(xg=!1,a.Qa(lb)){case 38:case 46:case 54:case 62:case 100:case 101:case 102:case 103:case 240:Tq(a,
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diff --git a/versions/pcjs/1.21.4/pc.js b/versions/pcjs/1.21.4/pc.js
index 81f50f300..3e897b041 100644
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 function cg(a){if(-1===this.F)return t.call(this,6),a;var b=a,c=this.Tb(this.F),d=this.Tb(this.F+this.U);2==this.U&&(b=a<<16>>16,c=c<<16>>16,d=d<<16>>16);this.A-=this.B.bi;(b<c||b>d)&&t.call(this,5);this.L|=2;return a}function dg(a,b){var c=0;if(b){ye(this);for(var d=1;d&this.N;){if(b&d){a=c;break}d<<=1;c++}}else Ae(this);this.A-=11+3*c;return a}function eg(a,b){var c=0;if(b){ye(this);for(var d=2==this.U?15:31,e=1<<d;e;){if(b&e){a=d;break}e>>>=1;c++;d--}}else Ae(this);this.A-=11+3*c;return a}
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 a,this.U,this.J&this.N,this.Y-1),this.A-=this.B.Pg)},ri,ri,function(){this.L|=132;this.A-=this.B.Rc},function(){this.L|=68;this.A-=this.B.Rc},function(){this.W&131072?t.call(this,13,0):(this.Ea|=4,this.A-=2,this.W&512||oc(this))},function(){je(this)?qe(this):pe(this);this.A-=2},function(){this.Hb=!1;this.yc.call(this,vi,Gh);this.Hb&&(this.J=this.J&~this.N|this.ua&this.N)},function(){this.Hb=!1;this.Ja.call(this,wi,Gh);this.Hb&&(this.J=this.J&~this.N|this.ua&this.N,this.M=this.M&~this.N|this.Ga&this.N)},
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+window.webkitAudioContext),this.La&&(this.qa=new this.La));this.reset(!0);ab(this)}Qa(S);var Ai=5150.9,Re=5170,zi={5150:5150,5160:5160,5170:Re,att6300:5160.101,mpc1600:5150.101,z150:5160.15,compaq:5150.102,other:Ai,deskpro386:5180},Ci="sw1",Gi="sw2",Hi={vj:1,ONE:0,Jm:64,Hm:128,lm:192,lc:192,Zf:6},Ii={Im:16,em:32,tm:48,lc:48,Zf:4},Ei=1,Fi=4,T={5150:[{},{}]};T[5150][0][Ei]={lc:192,Oc:{1:0,2:64,3:128,4:192},gd:"Number of Floppy Drives"};T[5150][0][3]={lc:2,Oc:{0:0,1:2},gd:"Coprocessor"};
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@@ -523,10 +523,10 @@ l.je=function(a,b){if(this.cc&&this.A&&this.A.ea.Sb)switch(a){case ml:if(this.P!
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+function gm(a,b,c,d){var e=null;a.re=!1;var f=0>d&&a.aa&&!a.aa.ea.Rb;if(a.Af)d?a.controller.Ca('Unable to connect to disk "'+a.H+'" (error '+d+": "+c+")",f):(a.D=!0,e=a);else if(d)a.controller.Ca('Unable to load disk "'+a.B+'" (error '+d+": "+b+")",f);else{Sa(a.controller.lf,b,c);try{if(0<fa(a.hj,!0).toLowerCase().indexOf("-readonly"))a.re=!0;else{var g=c.indexOf("\n");0<g&&1024>g&&0<c.substring(0,g).indexOf("write-protected")&&(a.re=!0)}var h;"<"==c.substr(0,1)?h=["Missing disk image: "+a.B]:h=0>
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@@ -541,66 +541,66 @@ l.save=function(){var a=0,b=[];b[a++]=[this.H,this.L,this.ib,this.jb,this.eb,thi
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+function pm(a){var b=a.data,c=b.length;if(c<<2==a.length){for(var d=c-1,e=b[d],f=0;d--&&b[d]===e;)f++;f++&&(b.length=c-f,a.pattern=e)}}function qm(a){Ia.call(this,"FDC",a,qm);this.dmaRead=this.qj;this.dmaWrite=this.rj;this.dmaFormat=this.Cj;this.K=a.autoMount||null;this.C=[];this.X=!ya("Mobi")&&window&&"FileReader"in window}Qa(qm);aa={};
 var rm={3:{jd:3,xd:0,name:aa.Fm},4:{jd:2,xd:1,name:aa.Dm},5:{jd:9,xd:7,name:aa.Nm},6:{jd:9,xd:7,name:aa.ym},7:{jd:2,xd:0,name:aa.Am},8:{jd:1,xd:2,name:aa.Em},10:{jd:2,xd:7,name:aa.zm},13:{jd:6,xd:7,name:aa.km},15:{jd:3,xd:0,name:aa.Cm}};l=qm.prototype;
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-case "loadDrive":return this.la[b]=c,c.onclick=function(){var a=d.la.listDisks;a&&tm(d,a.options[a.selectedIndex].text,a.value)},!0;case "saveDrive":if(!this.X){c.parentNode.removeChild(c);break}this.la[b]=c;c.onclick=function(){var a=d.la.listDrives;if(a&&a.options&&d.B)if(a=ca(a.value,10),a=d.B[a])if(a.ta){for(var b=a.ta,c="",h=0,k;k=im(b,h++);)for(var m=0,p=k.length;m<p;m++)c+=String.fromCharCode(jm(b,k,m));a=za(btoa(c),"octet-stream",!0,a.ta.gj.replace(".json",".img"));n(a)}else d.Ca("No disk loaded in drive");
+case "loadDrive":return this.la[b]=c,c.onclick=function(){var a=d.la.listDisks;a&&tm(d,a.options[a.selectedIndex].text,a.value)},!0;case "saveDrive":if(!this.X){c.parentNode.removeChild(c);break}this.la[b]=c;c.onclick=function(){var a=d.la.listDrives;if(a&&a.options&&d.B)if(a=ca(a.value,10),a=d.B[a])if(a.ta){for(var b=a.ta,c="",h=0,k;k=im(b,h++);)for(var m=0,p=k.length;m<p;m++)c+=String.fromCharCode(jm(b,k,m));a=za(btoa(c),"octet-stream",!0,a.ta.hj.replace(".json",".img"));n(a)}else d.Ca("No disk loaded in drive");
 else d.Ca("No drive selected")};return!0;case "mountDrive":if(!this.X){c.parentNode.removeChild(c);break}this.la[b]=c;c.addEventListener("change",function(){var a=c.children[0];a.children[1].disabled=!a.children[0].files.length});c.onsubmit=function(a){if(a=a.currentTarget[1].files[0]){var b=a.name;tm(d,fa(b,!0),b,a)}return!1};return!0}return!1};
 l.pc=function(a,b,c,d){this.ha=b;this.A=c;this.Ia=d;this.aa=a;this.P=kb(a,"ChipSet");if((this.K=jc(this.aa,"autoMount")||this.K)&&"string"==typeof this.K)try{this.K=eval("("+this.K+")")}catch(e){n("FDC auto-mount error: "+e.message+" ("+this.K+")"),this.K=null}um(this);Nb(b,this,vm);Pb(b,this,wm);this.X&&xm(this,"Local Disk","?");xm(this,"Remote Disk","??");ym(this)||ab(this)};
 l.Vb=function(a,b){if(!b){if(!a||!this.restore){if(this.reset(),this.aa.jg){this.C=[];for(var c=0;c<this.B.length;c++)zm(this,c,!0);ym(this,!0)}}else if(!this.restore(a))return!1;if(c=this.la.listDrives){for(;c.firstChild;)c.removeChild(c.firstChild);c.textContent="";for(var d=0;d<this.Y;d++){var e=document.createElement("option");e.value=d;e.textContent=String.fromCharCode(65+d)+":";c.appendChild(e)}0<this.Y&&(c.value="0",sm(this,0))}}return!0};l.Ub=function(a){return a?this.save():!0};l.reset=function(){um(this)};
-l.save=function(){var a=new ce(this),b=0,c=[];c[b++]=this.Qa;c[b++]=0;c[b++]=this.Z;c[b++]=this.I;c[b++]=this.G;c[b++]=this.D;c[b++]=this.S;for(var d=b++,e=0,f=[],g=0;g<this.B.length;g++){var h=e++,k=this.B[g],m=0,p=[];p[m++]=k.kb;p[m++]=[k.name,k.ib,k.jb,k.eb,k.nb,k.oe,k.Hf,k.Ue,k.Ve];p[m++]=k.Ya;p[m++]=k.vd+100;p[m++]=k.xb;p[m++]=k.mb;p[m++]=k.wd;p[m++]=k.wb;p[m++]=k.Ua;p[m++]=k.me;p[m++]=k.hj;p[m]=k.Vd;f[h]=p}c[d]=f;d=b++;for(e=0;e<this.B.length;e++)f=this.B[e],f.ta&&Am(this,f.Vd,f.ta);c[d]=this.C;
+l.save=function(){var a=new ce(this),b=0,c=[];c[b++]=this.Qa;c[b++]=0;c[b++]=this.Z;c[b++]=this.I;c[b++]=this.G;c[b++]=this.D;c[b++]=this.S;for(var d=b++,e=0,f=[],g=0;g<this.B.length;g++){var h=e++,k=this.B[g],m=0,p=[];p[m++]=k.kb;p[m++]=[k.name,k.ib,k.jb,k.eb,k.nb,k.oe,k.Hf,k.Ue,k.Ve];p[m++]=k.Ya;p[m++]=k.vd+100;p[m++]=k.xb;p[m++]=k.mb;p[m++]=k.wd;p[m++]=k.wb;p[m++]=k.Ua;p[m++]=k.me;p[m++]=k.ij;p[m]=k.Vd;f[h]=p}c[d]=f;d=b++;for(e=0;e<this.B.length;e++)f=this.B[e],f.ta&&Am(this,f.Vd,f.ta);c[d]=this.C;
 c[b++]=this.L;c[b]=this.H;C(a,0,c);return a.data()};l.restore=function(a){return um(this,a[0])};
 function um(a,b){var c=0,d,e=!0;void 0===b&&(b=[0,0,128,Array(9),0,0,0,[]]);a.Qa=b[c++];c++;a.Z=b[c++];a.I=b[c++];a.G=b[c++];a.D=b[c++];a.S=b[c++];var f=b[c++];d=b[c++];null!=d&&(a.C=d);void 0===a.B&&(a.Y=4,a.P&&(a.Y=+Zi(a.P,Ei,void 0)),a.B=Array(4));for(d=0;d<a.B.length;d++){var g=a.B[d];if(void 0===g){var g=a.B[d]={},h;if(a.P)a:{h=a.P;if(d<+Zi(h,Ei,void 0)){if(!h.Y){h=360;break a}if(d<h.Y.length){h=h.Y[d];break a}}h=0}else h=0;switch(h){case 160:case 180:g.jb=1;default:g.ib=40;g.eb=9;break;case 720:g.ib=
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 g.wb=p[x++];g.Ua=p[x++];g.Wa=null;g.ta||(g.Vd="");r=p[x++];102==r&&(r=!1);if("boolean"==typeof r){var z=r,r=p[x++],p=p[x];z?(x=r,r=k.B[m],zm(k,m,!0,!0),r.me=!0,m=new am(k,r,"preload"),k.Lh(r,m,x,p,!0)):Bm(k,m,r,p,!0)?g.ta&&p&&Cm(k,r,p,g.ta):ab(k,!1)}else void 0!==r&&g.ta&&0>g.ta.restore(r)&&(h=!1);h&&g.ta&&void 0!==g.Ua&&(g.Wa=g.ta.seek(g.xb,g.Ya,g.mb));h||(e=!1)}a.L=b[c++]||0;a.H=b[c]||0;return e}
-function ym(a,b){b||(a.R=0);if(a.K)for(var c in a.K){var d=a.K[c],e=d.path,f;if(!(f=d.name))a:{if((f=a.la.listDisks)&&f.options)for(var g=0;g<f.options.length;g++)if(f.options[g].value==e){f=f.options[g].innerText;break a}f=fa(e,!0)}if(e&&f&&(g=c.charCodeAt(0)-65,0<=g&&g<a.B.length)){!Bm(a,g,f,e,!0)&&b&&ab(a,!1);continue}a.Ca("Incorrect auto-mount settings for drive "+c+" ("+JSON.stringify(d)+")")}return!!a.R}
+function ym(a,b){b||(a.R=0);if(a.K)for(var c in a.K){var d=a.K[c],e=d.path,f;if(!(f=d.name))a:{if((f=a.la.listDisks)&&f.options)for(var g=0;g<f.options.length;g++){var h=f.options[g];if(h.value==e){f=h.textContent;break a}}f=fa(e,!0)}if(e&&f&&(g=c.charCodeAt(0)-65,0<=g&&g<a.B.length)){!Bm(a,g,f,e,!0)&&b&&ab(a,!1);continue}a.Ca("Incorrect auto-mount settings for drive "+c+" ("+JSON.stringify(d)+")")}return!!a.R}
 function tm(a,b,c,d){var e,f=a.la.listDrives;if(f&&!isNaN(e=ca(f.value,10))&&0<=e&&e<a.B.length)if(c)if("?"==c)a.Ca('Use "Choose File" and "Mount" to select and load a local disk.');else{if("??"==c){c=window.prompt("Enter the URL of a remote disk image.","")||"";if(!c)return;b=fa(c)}for(;0>Bm(a,e,b,c,!1,d)&&window.confirm("Click OK to reload the original disk.\n(WARNING: All disk changes will be discarded)");){for(var f=a,g=c,h=void 0,h=0;h<f.C.length;h++)if(f.C[h][1]==g){f.C.splice(h,1);break}zm(a,
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-l.Lh=function(a,b,c,d,e){var f;a.Qc=!1;b&&(f=b.info(),b&&f[0]>a.ib||f[1]>a.jb)&&(this.Ca('Diskette "'+c+'" too large for drive '+String.fromCharCode(65+a.Qa)),b=null);b?(a.ta=b,a.hj=c,a.Vd=d,Cm(this,c,d,b),f=b.info(),this.L|=128,this.Ca('Mounted diskette "'+c+'" in drive '+String.fromCharCode(65+a.Qa),a.Nd||e),a.Hf=f[0],a.Ue=f[1],a.Ve=f[2],this.aa&&uc(this.aa)):a.me=!1;a.Nd&&(a.Nd=!1,--this.R||ab(this));sm(this,a.Qa)};
+l.Lh=function(a,b,c,d,e){var f;a.Qc=!1;b&&(f=b.info(),b&&f[0]>a.ib||f[1]>a.jb)&&(this.Ca('Diskette "'+c+'" too large for drive '+String.fromCharCode(65+a.Qa)),b=null);b?(a.ta=b,a.ij=c,a.Vd=d,Cm(this,c,d,b),f=b.info(),this.L|=128,this.Ca('Mounted diskette "'+c+'" in drive '+String.fromCharCode(65+a.Qa),a.Nd||e),a.Hf=f[0],a.Ue=f[1],a.Ve=f[2],this.aa&&uc(this.aa)):a.me=!1;a.Nd&&(a.Nd=!1,--this.R||ab(this));sm(this,a.Qa)};
 function xm(a,b,c){if((a=a.la.listDisks)&&a.options){for(var d=0;d<a.options.length;d++)if(a.options[d].value==c)return;d=document.createElement("option");d.value=c;d.textContent=b;a.appendChild(d)}}
-function sm(a,b){if(0<=b&&b<a.B.length){var c=a.B[b],d=a.la.listDisks,e=a.la.listDrives;if(d&&e&&d.options&&e.options&&(e=ca(e.value,10),c=c.me?"?":c.Vd,!isNaN(e)&&e==b)){for(e=0;e<d.options.length;e++)if(d.options[e].value==c){d.selectedIndex!=e&&(d.selectedIndex=e);break}e==d.options.length&&(d.selectedIndex=0)}}}function zm(a,b,c,d){var e=a.B[b];e.ta&&(Am(a,e.Vd,e.ta),e.hj="",e.Vd="",e.ta=null,e.me=!1,a.L|=128,d||a.Ca("Drive "+String.fromCharCode(65+b)+" unloaded",c),c||d||sm(a,b))}
+function sm(a,b){if(0<=b&&b<a.B.length){var c=a.B[b],d=a.la.listDisks,e=a.la.listDrives;if(d&&e&&d.options&&e.options&&(e=ca(e.value,10),c=c.me?"?":c.Vd,!isNaN(e)&&e==b)){for(e=0;e<d.options.length;e++)if(d.options[e].value==c){d.selectedIndex!=e&&(d.selectedIndex=e);break}e==d.options.length&&(d.selectedIndex=0)}}}function zm(a,b,c,d){var e=a.B[b];e.ta&&(Am(a,e.Vd,e.ta),e.ij="",e.Vd="",e.ta=null,e.me=!1,a.L|=128,d||a.Ca("Drive "+String.fromCharCode(65+b)+" unloaded",c),c||d||sm(a,b))}
 function Cm(a,b,c,d){var e;for(e=0;e<a.C.length;e++)if(a.C[e][1]==c){d.restore(a.C[e][2]);return}a.C[e]=[b,c,[]]}function Am(a,b,c){var d;for(d=0;d<a.C.length;d++)if(a.C[d][1]==b){a.C[d][2]=c.save();break}}l.Al=function(a,b){b&4?this.S&4||this.S&8&&this.P&&Te(this.P,6):um(this);this.S=b};l.lk=function(){return 80};l.nk=function(){return this.Z};l.kk=function(){var a=0;this.G<this.D&&(a=this.I[this.G]);this.S&8&&this.P&&Se(this.P,6);++this.G>=this.D&&(this.Z&=-81,this.G=this.D=0);return a};
 l.zl=function(a,b){this.D<this.I.length&&(this.I[this.D++]=b);var c=this.I[0]&31;if(void 0!==rm[c]&&this.D>=rm[c].jd){var d=!1;this.G=0;var c=Dm(this),e,f,g,h,k,m=c&31;switch(m){case 3:Dm(this);Dm(this);Em(this);break;case 4:f=Dm(this);this.Qa=f&3;e=this.B[this.Qa];Em(this);Fm(this,(e.kb&-16777216)>>>24);break;case 5:case 6:f=Dm(this);d=f>>2&1;this.Qa=f&3;e=this.B[this.Qa];e.Ya=d;f=e.xb=Dm(this);g=Dm(this);h=e.mb=Dm(this);k=Dm(this);e.wb=128<<k;e.wd=Dm(this);Dm(this);Dm(this);6==m?(m=e,m.kb=72,m.ta&&
 (m.Wa=null,m.kb=0,this.P&&(Cj(this.P,2,this,"dmaRead",m),yj(this.P,2)))):(m=e,m.kb=72,m.ta&&(m.ta.re?m.kb=576:(m.Wa=null,m.kb=0,this.P&&(Cj(this.P,2,this,"dmaWrite",m),yj(this.P,2)))));Gm(this,e,c,d,f,g,h,k);d=!0;break;case 7:f=Dm(this);this.Qa=f&3;e=this.B[this.Qa];e.xb=e.vd=0;e.kb=268435488;Em(this);d=!0;break;case 8:e=this.B[this.Qa];e.Ya=0;Em(this);Fm(this,e.Qa|e.Ya<<2|e.kb&255);Fm(this,e.xb);this.Qa=this.Qa+1&3;break;case 10:f=Dm(this);d=f>>2&1;this.Qa=f&3;e=this.B[this.Qa];f=e.xb;g=e.Ya=d;h=
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+function Dm(a){var b=a.I[a.G];a.G++;return b}function Em(a){a.G=a.D=0}function Fm(a,b){a.I[a.D++]=b}l.qj=function(a,b,c){if(void 0===b||0>b){b=-1;var d=null,e=0;if(!a.kb&&a.ta){do{if(a.Wa&&(e=a.Ua,0<=(b=a.ta.read(a.Wa,a.Ua++)))){d=a.Wa;break}a.Wa=a.ta.seek(a.xb,a.Ya,a.mb);if(!a.Wa){a.kb=1088;break}a.Ua=0;Hm(a)}while(1)}c(b,!1,d,e)}else c(-1,!1)};l.rj=function(a,b){return void 0!==b&&0<=b?Im(a,b):-1};
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