├── LICENCE.md
├── ROM
    ├── Rocket2.c8k
    ├── TAPEWORM.c8k
    ├── IBM.ch8
    ├── ROM.zip
    ├── UFO.ch8
    ├── BLINKY.ch8
    ├── BLITZ.ch8
    ├── BRIX.ch8
    ├── C8PIC.ch8
    ├── CAVE.ch8
    ├── FILTER.ch8
    ├── GUESS.ch8
    ├── HIDDEN.ch8
    ├── KALEID.ch8
    ├── MAZE.ch8
    ├── MERLIN.ch8
    ├── PONG.ch8
    ├── PONG2.ch8
    ├── PUZZLE.ch8
    ├── ROCKET.ch8
    ├── SOCCER.ch8
    ├── SPACEF.ch8
    ├── SQUASH.ch8
    ├── SYZYGY.ch8
    ├── TANK.ch8
    ├── TETRIS.ch8
    ├── TICTAC.ch8
    ├── TRON.ch8
    ├── VBRIX.ch8
    ├── VERS.ch8
    ├── WALL.ch8
    ├── 15PUZZLE.ch8
    ├── AIRPLANE.ch8
    ├── BREAKOUT.ch8
    ├── CONNECT4.ch8
    ├── FIGURES.ch8
    ├── INVADERS.ch8
    ├── LANDING.ch8
    ├── MISSILE.ch8
    ├── PADDLES.ch8
    ├── PONG(1P).ch8
    ├── Rocket2.ch8
    ├── TAPEWORM.ch8
    ├── TIMEBOMB.ch8
    ├── WIPEOFF.ch8
    └── X-MIRROR.ch8
├── README.md
├── jsexe.exe
├── c8.min.pack.html
├── .gitattributes
├── index.html
├── before_png.js
├── c8.decompiler.min.pack.html
├── c8.min.html
├── HOW TO PLAY.txt
├── .gitignore
└── c8.html


/LICENCE.md:
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1 | public domain


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/ROM/Rocket2.c8k:
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1 | 0123456789ABCDE5


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/ROM/TAPEWORM.c8k:
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1 | 0123456789ABCDE5


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/README.md:
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1 | http://xem.github.io/chip8


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/jsexe.exe:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/xem/chip8/HEAD/jsexe.exe


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/ROM/IBM.ch8:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/xem/chip8/HEAD/ROM/IBM.ch8


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/ROM/ROM.zip:
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https://raw.githubusercontent.com/xem/chip8/HEAD/ROM/ROM.zip


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/ROM/UFO.ch8:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/xem/chip8/HEAD/ROM/UFO.ch8


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/ROM/BLINKY.ch8:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/xem/chip8/HEAD/ROM/BLINKY.ch8


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/ROM/BLITZ.ch8:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/xem/chip8/HEAD/ROM/BLITZ.ch8


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/ROM/BRIX.ch8:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/xem/chip8/HEAD/ROM/BRIX.ch8


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/ROM/C8PIC.ch8:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/xem/chip8/HEAD/ROM/C8PIC.ch8


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/ROM/CAVE.ch8:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/xem/chip8/HEAD/ROM/CAVE.ch8


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/ROM/FILTER.ch8:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/xem/chip8/HEAD/ROM/FILTER.ch8


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/ROM/GUESS.ch8:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/xem/chip8/HEAD/ROM/GUESS.ch8


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/ROM/HIDDEN.ch8:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/xem/chip8/HEAD/ROM/HIDDEN.ch8


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/ROM/KALEID.ch8:
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https://raw.githubusercontent.com/xem/chip8/HEAD/ROM/KALEID.ch8


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/ROM/MAZE.ch8:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/xem/chip8/HEAD/ROM/MAZE.ch8


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/ROM/MERLIN.ch8:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/xem/chip8/HEAD/ROM/MERLIN.ch8


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/ROM/PONG.ch8:
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https://raw.githubusercontent.com/xem/chip8/HEAD/ROM/PONG.ch8


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/ROM/PONG2.ch8:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/xem/chip8/HEAD/ROM/PONG2.ch8


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/ROM/PUZZLE.ch8:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/xem/chip8/HEAD/ROM/PUZZLE.ch8


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/ROM/ROCKET.ch8:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/xem/chip8/HEAD/ROM/ROCKET.ch8


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/ROM/SOCCER.ch8:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/xem/chip8/HEAD/ROM/SOCCER.ch8


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/ROM/SPACEF.ch8:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/xem/chip8/HEAD/ROM/SPACEF.ch8


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/ROM/SQUASH.ch8:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/xem/chip8/HEAD/ROM/SQUASH.ch8


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/ROM/SYZYGY.ch8:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/xem/chip8/HEAD/ROM/SYZYGY.ch8


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/ROM/TANK.ch8:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/xem/chip8/HEAD/ROM/TANK.ch8


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/ROM/TETRIS.ch8:
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https://raw.githubusercontent.com/xem/chip8/HEAD/ROM/TETRIS.ch8


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/ROM/TICTAC.ch8:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/xem/chip8/HEAD/ROM/TICTAC.ch8


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/ROM/TRON.ch8:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/xem/chip8/HEAD/ROM/TRON.ch8


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/ROM/VBRIX.ch8:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/xem/chip8/HEAD/ROM/VBRIX.ch8


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/ROM/VERS.ch8:
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https://raw.githubusercontent.com/xem/chip8/HEAD/ROM/VERS.ch8


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/ROM/WALL.ch8:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/xem/chip8/HEAD/ROM/WALL.ch8


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/ROM/15PUZZLE.ch8:
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https://raw.githubusercontent.com/xem/chip8/HEAD/ROM/15PUZZLE.ch8


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/ROM/AIRPLANE.ch8:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/xem/chip8/HEAD/ROM/AIRPLANE.ch8


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/ROM/BREAKOUT.ch8:
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https://raw.githubusercontent.com/xem/chip8/HEAD/ROM/BREAKOUT.ch8


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/ROM/CONNECT4.ch8:
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https://raw.githubusercontent.com/xem/chip8/HEAD/ROM/CONNECT4.ch8


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/ROM/FIGURES.ch8:
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https://raw.githubusercontent.com/xem/chip8/HEAD/ROM/FIGURES.ch8


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/ROM/INVADERS.ch8:
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https://raw.githubusercontent.com/xem/chip8/HEAD/ROM/INVADERS.ch8


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/ROM/LANDING.ch8:
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https://raw.githubusercontent.com/xem/chip8/HEAD/ROM/LANDING.ch8


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/ROM/MISSILE.ch8:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/xem/chip8/HEAD/ROM/MISSILE.ch8


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/ROM/PADDLES.ch8:
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https://raw.githubusercontent.com/xem/chip8/HEAD/ROM/PADDLES.ch8


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/ROM/PONG(1P).ch8:
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https://raw.githubusercontent.com/xem/chip8/HEAD/ROM/PONG(1P).ch8


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/ROM/Rocket2.ch8:
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https://raw.githubusercontent.com/xem/chip8/HEAD/ROM/Rocket2.ch8


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/ROM/TAPEWORM.ch8:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/xem/chip8/HEAD/ROM/TAPEWORM.ch8


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/ROM/TIMEBOMB.ch8:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/xem/chip8/HEAD/ROM/TIMEBOMB.ch8


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/ROM/WIPEOFF.ch8:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/xem/chip8/HEAD/ROM/WIPEOFF.ch8


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/ROM/X-MIRROR.ch8:
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https://raw.githubusercontent.com/xem/chip8/HEAD/ROM/X-MIRROR.ch8


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/c8.min.pack.html:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/xem/chip8/HEAD/c8.min.pack.html


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/.gitattributes:
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 1 | # Auto detect text files and perform LF normalization
 2 | * text=auto
 3 | 
 4 | # Custom for Visual Studio
 5 | *.cs     diff=csharp
 6 | *.sln    merge=union
 7 | *.csproj merge=union
 8 | *.vbproj merge=union
 9 | *.fsproj merge=union
10 | *.dbproj merge=union
11 | 
12 | # Standard to msysgit
13 | *.doc	 diff=astextplain
14 | *.DOC	 diff=astextplain
15 | *.docx diff=astextplain
16 | *.DOCX diff=astextplain
17 | *.dot  diff=astextplain
18 | *.DOT  diff=astextplain
19 | *.pdf  diff=astextplain
20 | *.PDF	 diff=astextplain
21 | *.rtf	 diff=astextplain
22 | *.RTF	 diff=astextplain
23 | 


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/index.html:
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 1 | <!doctype html>
 2 | <meta charset=utf-8>
 3 | <title>Chip8 1k</title>
 4 | <a href=//github.com/xem/chip8><img style="position:absolute;top:0;right:0;border:0;" src="https://s3.amazonaws.com/github/ribbons/forkme_right_darkblue_121621.png" alt="Fork me on GitHub"></a>
 5 | <h1>~1kb Chip8 emulator</h1>
 6 | <hr>
 7 | <h2>ROMS</h2>
 8 | 
 9 | - <a href="ROM/ROM.zip">Download all roms</a> (it's legal)
10 | <br>
11 | <br>
12 | <hr>
13 | <h2>Emulator</h2>
14 | 
15 | - <a href="c8.html">Commented emulator</a> (with sound)
16 | <br>
17 | - <a href="c8.min.html">Golfed emulator</a> (by xem, p01, rlauck, aemkei, subzey)
18 | <br>
19 | - <a href="c8.min.pack.html">Packed emulator</a> (1028b)
20 | <br>
21 | <br>
22 | <b>Controls:</b> numpad 0-9 + QWERTY
23 | <br>
24 | <br>
25 | <hr>
26 | <h2>Decompiler</h2>
27 | 
28 | - <a href="c8.decompiler.min.pack.html">ROM Decompiler!</a> (1024b gzipped!)
29 | 
30 | <br>
31 | <br>
32 | <hr>
33 | <br>
34 | © 2014-2015 Maxime Euzière
35 | 
36 | <style>
37 | body { width: 500px; margin: 50px auto; font-family: arial; }
38 | </style>


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/before_png.js:
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1 | V.width=64;n=[];for(a=80;a--;)n[a]="0x"+"F999F26227F1F8FF1F1F99F11F8F1FF8F9FF1244F9F9FF9F1FF9F99E9E9EF888FE999EF8F8FF8F88"[a]<<4;for(a=3;a<8192;a+=4)q.data[a]=255;V=new(U=Uint8Array)(16);D=[];h=512;g=r=w=k=0;s=[];with(new XMLHttpRequest)open("GET",location.hash.slice(1)),send(responseType="arraybuffer",onload=function(c){u=new U(response);for(a=3584;a--;)n[a+512]=u[a];setInterval(function(c){w&&w--;for(F=9;F--;){p=n[h]<<8|n[h+1];f=p>>12;x=p&4095;d=p&255;l=p&15;b=p>>8&15;z=V[b];m=V[p>>4&15];e(["if(l)h=D.pop();else for(a=3;8192>a;a+=4)q.data[a]=255","h=x-2","D.push(h),h=x-2","if(z==d)h+=2","if(z!=d)h+=2","if(z==m)h+=2","V[b]=d","V[b]=z+d",["V[b]=m","V[b]|=m","V[b]&=m","V[b]^=m","V[15]=+(255<(V[b]+=m))","V[15]=+(0<=(V[b]-=m))","V[15]=z&1;V[b]/=2","V[15]=+(0<=(V[b]=m-z))",,,,,,,"V[15]=z>>7;V[b]*=2"][l],"if(z!=m)h+=2","k=x","h=x+V[0]","V[b]=~~(Math.random()*d)","for(V[15]=0,a=l;a--;)for(B=8;B--;)y=z+B,A=m+a,(n[k+a]>>7-B&1)&&(63<y&&(y-=63),31<A&&(A-=31),u=4*(64*A+y)+3,q.data[u]?q.data[u]=0:(q.data[u]=255,V[15]=1))","if((158==d&&s[z])||(161==d&&!s[z]))h+=2",["w=z","k=5*z",,,"for(a=b;a--;)V[a]=n[k+a]","V[b]=w",,"for(a=b;a--;)n[k+a]=V[a]","~(V[b]=s.indexOf('w'))||(h-=2)","k+=z;V[15]=+(4095<k);k&=4095",,"for(a=3;a--;)n[k+a]=(''+z)[a]"][d%19-2]][f]);h+=2}C.putImageData(q,0,0)},16)});onkeydown=onkeyup=function(c){s[[0,7,8,9,4,5,6,1,2,3,33,39,21,34,36,41].indexOf(c.keyCode%48)]=c.type[5]}


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/c8.decompiler.min.pack.html:
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1 | <input onchange="with(f=new FileReader)readAsArrayBuffer(files[0]),onload=s"type=file><script>s=z=>{u=new Uint8Array(f.result);for(i=0;i<u.length;i+=2)o=u[i]<<8|u[i+1],p=o>>12,l=("00"+(o&4095).toString(16)).slice(-3),q=o&255,m=(0+q.toString(16)).slice(-2),n=o&15,N=n.toString(16),X=(o>>8&15).toString(16),Y=(o>>4&15).toString(16),a.innerHTML+=(1E3+(+i+512).toString(16)).slice(-4)+" | "+(1E3+o.toString(16)).slice(-4)+"  | "+([n?"RET		| return":"CLS		| clear screen","JP 0x"+l+"		| jump to 0x"+l,"CALL 0x"+l+"	| call subprogram at 0x"+l,"SE V"+X+", 0x"+m+"	| skip next if V"+X+" == 0x"+m,"SNE V"+X+", 0x"+m+"	| skip next if V"+X+" != 0x"+m,"SE V"+X+", V"+Y+"	| skip next if V"+X+" == V"+Y,"LD V"+X+", 0x"+m+"	| set V"+X+" to 0x"+m,"ADD V"+X+", 0x"+m+"	| add 0x"+m+" to V"+X,["LD V"+X+", V"+Y+"	| set V"+X+" to V"+Y,"OR V"+X+", V"+Y+"	| set V"+X+" to V"+X+" OR V"+Y,"AND V"+X+", V"+Y+"	| set V"+X+" to V"+X+" AND V"+Y,"XOR V"+X+", V"+Y+"	| set V"+X+" to V"+X+" XOR V"+Y,"ADD V"+X+", V"+Y+"	| add V"+Y+" to V"+X+" (VF = carry)","SUB V"+X+", V"+Y+"	| substract V"+Y+" to V"+X+" (VF = NOT borrow)","SHR V"+X+"		| right shift V"+X+" (VF = shifted bit)","SUBN V"+X+", V"+Y+"	| substract V"+X+" to V"+Y+" (VF = NOT borrow)",,,,,,"SHL V"+X+"		| left shift V"+X+" (VF = shifted bit)"][n],"SNE V"+X+", V"+Y+"	| skip next if V"+X+" != V"+Y,"LD I, 0x"+l+"	| set I to 0x"+l,"JP V0, 0x"+l+"	| jump to 0x"+l+" + V0","RND V"+X+", 0x"+m+"	| set V"+X+" to a random number < 0x"+m,"DRW V"+X+", V"+Y+", 0x"+N+"	| draw the 8*"+N+ "px sprite at @I at ["+X+":"+Y+"]",q-158?"SKNP V"+X+"		| skip next if the key in V"+X+" is not pressed":"SKP V"+X+"		| skip next if the key in V"+X+" is pressed",["LD DT, V"+X+"	| set timer to V"+X,"LD F, V"+X+"		| set I to the character at V"+X,,"LD ST, V"+X+"	| set sound timer to V"+X,"LD V"+X+", [I]	| load V0 to V"+X+" from @I to @I+"+X,"LD V"+X+", DT	| load timer value in V"+X,,"LD [I], V"+X+"	| store V0 to V"+X+" in @I to @I+"+X,"LD V"+X+", K	| store key pressed in V"+X,"ADD I, V"+X+"	| add V"+X+" to I (VF = I overflow)",,"LD B, V"+X+"		| store V"+X+" in base 10 at I (hundreds), I+1 (dozens) and I+2"][q%19-2]][p]||"?		| ?")+"\n"}</script><pre id=a>


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/c8.min.html:
--------------------------------------------------------------------------------
1 | <canvas id=V width=64></canvas><a href=//github.com/xem/chip8><img style="position:absolute;top:0;right:0;border:0;" src="https://s3.amazonaws.com/github/ribbons/forkme_right_darkblue_121621.png" alt="Fork me on GitHub"></a><h1>1kb chip8 emulator</h1><h2>Minified & golfed source code</h2><div><a href=.>Homepage</a><br><br>Choose a ROM:<br><a href="c8.min.html?1#ROM/C8PIC.ch8">C8PIC</a><br><a href="c8.min.html?2#ROM/IBM.ch8">IBM</a><br><a href="c8.min.html?3#ROM/Rocket2.ch8">Rocket2</a> (press Y to launch)<br><a href="c8.min.html?4#ROM/X-MIRROR.ch8">X-MIRROR</a> (press 2,4,6,8 to draw)<br><a href="c8.min.html?5#ROM/TAPEWORM.ch8">TAPEWORM</a> (Y to start, 2,4,6,8 to move)<br><a href="c8.min.html?6#ROM/TIMEBOMB.ch8">TIMEBOMB</a> (set up with 2 and 8, start with 5)<br><a href="c8.min.html?8#ROM/AIRPLANE.ch8">AIRPLANE</a> (send bombs with 2)<br><a href="c8.min.html?10#ROM/BLITZ.ch8">BLITZ</a> (send bombs with 2)<br><a href="c8.min.html?11#ROM/BREAKOUT.ch8">BREAKOUT</a> (move with 4 and 6)<br><a href="c8.min.html?12#ROM/BRIX.ch8">BRIX</a> (move with 4 and 6)<br><a href="c8.min.html?13#ROM/CAVE.ch8">CAVE</a> (start with Y, move with 2,4,6,8)<br><a href="c8.min.html?14#ROM/CONNECT4.ch8">CONNECT4</a><br><a href="c8.min.html?15#ROM/FIGURES.ch8">FIGURES</a><br><a href="c8.min.html?16#ROM/FILTER.ch8">FILTER</a><br><a href="c8.min.html?17#ROM/GUESS.ch8">GUESS</a><br><a href="c8.min.html?18#ROM/HIDDEN.ch8">HIDDEN</a><br><a href="c8.min.html?19#ROM/INVADERS.ch8">INVADERS</a><br><a href="c8.min.html?20#ROM/KALEID.ch8">KALEID</a><br><a href="c8.min.html?21#ROM/LANDING.ch8">LANDING</a><br><a href="c8.min.html?22#ROM/MAZE.ch8">MAZE</a><br><a href="c8.min.html?23#ROM/MERLIN.ch8">MERLIN</a><br><a href="c8.min.html?24#ROM/MISSILE.ch8">MISSILE</a><br><a href="c8.min.html?25#ROM/PADDLES.ch8">PADDLES</a><br><a href="c8.min.html?26#ROM/PONG (1P).ch8">PONG (1P)</a><br><a href="c8.min.html?27#ROM/PONG.ch8">PONG</a><br><a href="c8.min.html?28#ROM/PONG2.ch8">PONG2</a><br><a href="c8.min.html?29#ROM/PUZZLE.ch8">PUZZLE</a><br><a href="c8.min.html?30#ROM/ROCKET.ch8">ROCKET</a><br><a href="c8.min.html?31#ROM/SOCCER.ch8">SOCCER</a><br><a href="c8.min.html?32#ROM/SPACEF.ch8">SPACEF</a><br><a href="c8.min.html?33#ROM/SQUASH.ch8">SQUASH</a><br><a href="c8.min.html?34#ROM/SYZYGY.ch8">SYZYGY</a><br><a href="c8.min.html?35#ROM/TANK.ch8">TANK</a><br><a href="c8.min.html?36#ROM/TETRIS.ch8">TETRIS</a><br><a href="c8.min.html?37#ROM/TICTAC.ch8">TICTAC</a><br><a href="c8.min.html?38#ROM/TRON.ch8">TRON</a><br><a href="c8.min.html?39#ROM/UFO.ch8">UFO</a><br><a href="c8.min.html?40#ROM/VBRIX.ch8">VBRIX</a><br><a href="c8.min.html?41#ROM/VERS.ch8">VERS</a><br><a href="c8.min.html?42#ROM/WALL.ch8">WALL</a><br><a href="c8.min.html?43#ROM/WIPEOFF.ch8">WIPEOFF</a><br><br></div><style>*{text-indent:-9999;color:#fff;font-family:arial}h1,h2,div{color:#000;text-indent:0}a{color:blue}h1,h2,canvas{position:absolute;left:10px}canvas{overflow:hidden;top:100px;-webkit-transform:scale(4);transform:scale(4);-webkit-transform-origin:0 0;transform-origin:0 0}h1{top:0;text-indent:0}h2{top:40px;text-indent:0}div{position:absolute;top:250px}</style>
2 | <script>
3 | q=(C=V.getContext("2d")).createImageData(64,32);
4 | e=eval;
5 | </script>
6 | <script src=before_png.js></script>
7 | 


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/HOW TO PLAY.txt:
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 1 | HOW TO PLAY
 2 | 
 3 | - Golf before_png.js
 4 | - Execute jsexe -cn before_png.js index.html
 5 | - Replace the code at the end of index.html (<canvas...) with this:
 6 | 
 7 | <canvas id=V><img src=# onload=C=V.getContext('2d');for($=_='';C.drawImage(this,$--,0),X=(q=C.getImageData(0,0,64,32)).data[0];_+=String.fromCharCode(X));(e=eval)(_)>
 8 | <!-- the above xxxx bytes load the chip8 ROM asked in the URL's hash and emulates it. -->
 9 | 
10 | <!-- the following code is just decoration -->
11 | </canvas><a href=//github.com/xem/chip8><img style="position:absolute;top:0;right:0;border:0;" src="https://s3.amazonaws.com/github/ribbons/forkme_right_darkblue_121621.png" alt="Fork me on GitHub"></a><h1>1kb chip8 emulator</h1><div>  Source code:  <br>  <a href=c8.html>commented, with sound</a>  <br>  <a href=c8.min.html>minified & golfed by xem, p01, rlauck, aemkei, subzey</a>  <br>  <br>  Choose a ROM:  <br>  <a href="index.html?1#ROM/TEST/C8PIC.ch8">C8PIC</a>  <br>  <a href="index.html?2#ROM/TEST/IBM.ch8">IBM</a>  <br>  <a href="index.html?3#ROM/TEST/Rocket2.ch8">Rocket2</a> (press Y to launch)  <br>  <a href="index.html?4#ROM/TEST/X-MIRROR.ch8">X-MIRROR</a> (press 2,4,6,8 to draw)  <br>  <a href="index.html?5#ROM/TEST/TAPEWORM.ch8">TAPEWORM</a> (Y to start, 2,4,6,8 to move)  <br>  <a href="index.html?6#ROM/TEST/TIMEBOMB.ch8">TIMEBOMB</a> (set up with 2 and 8, start with 5)  <br>  <a href="index.html?8#ROM/AIRPLANE.ch8">AIRPLANE</a> (send bombs with 2)  <br>  <a href="index.html?10#ROM/BLITZ.ch8">BLITZ</a> (send bombs with 2)  <br>  <a href="index.html?11#ROM/BREAKOUT.ch8">BREAKOUT</a> (move with 4 and 6)  <br>  <a href="index.html?12#ROM/BRIX.ch8">BRIX</a> (move with 4 and 6)  <br>  <a href="index.html?13#ROM/CAVE.ch8">CAVE</a> (start with Y, move with 2,4,6,8)  <br>  <a href="index.html?14#ROM/CONNECT4.ch8">CONNECT4</a>  <br>  <a href="index.html?15#ROM/FIGURES.ch8">FIGURES</a>  <br>  <a href="index.html?16#ROM/FILTER.ch8">FILTER</a>  <br>  <a href="index.html?17#ROM/GUESS.ch8">GUESS</a>  <br>  <a href="index.html?18#ROM/HIDDEN.ch8">HIDDEN</a>  <br>  <a href="index.html?19#ROM/INVADERS.ch8">INVADERS</a>  <br>  <a href="index.html?20#ROM/KALEID.ch8">KALEID</a>  <br>  <a href="index.html?21#ROM/LANDING.ch8">LANDING</a>  <br>  <a href="index.html?22#ROM/MAZE.ch8">MAZE</a>  <br>  <a href="index.html?23#ROM/MERLIN.ch8">MERLIN</a>  <br>  <a href="index.html?24#ROM/MISSILE.ch8">MISSILE</a>  <br>  <a href="index.html?25#ROM/PADDLES.ch8">PADDLES</a>  <br>  <a href="index.html?26#ROM/PONG(1P).ch8">PONG(1P)</a>  <br>  <a href="index.html?27#ROM/PONG.ch8">PONG</a>  <br>  <a href="index.html?28#ROM/PONG2.ch8">PONG2</a>  <br>  <a href="index.html?29#ROM/PUZZLE.ch8">PUZZLE</a>  <br>  <a href="index.html?30#ROM/ROCKET.ch8">ROCKET</a>  <br>  <a href="index.html?31#ROM/SOCCER.ch8">SOCCER</a>  <br>  <a href="index.html?32#ROM/SPACEF.ch8">SPACEF</a>  <br>  <a href="index.html?33#ROM/SQUASH.ch8">SQUASH</a>  <br>  <a href="index.html?34#ROM/SYZYGY.ch8">SYZYGY</a>  <br>  <a href="index.html?35#ROM/TANK.ch8">TANK</a>  <br>  <a href="index.html?36#ROM/TETRIS.ch8">TETRIS</a>  <br>  <a href="index.html?37#ROM/TICTAC.ch8">TICTAC</a>  <br>  <a href="index.html?38#ROM/TRON.ch8">TRON</a>  <br>  <a href="index.html?39#ROM/UFO.ch8">UFO</a>  <br>  <a href="index.html?40#ROM/VBRIX.ch8">VBRIX</a>  <br>  <a href="index.html?41#ROM/VERS.ch8">VERS</a>  <br>  <a href="index.html?42#ROM/WALL.ch8">WALL</a>  <br>  <a href="index.html?43#ROM/WIPEOFF.ch8">WIPEOFF</a>  <br>  <br></div><style>*{text-indent:-9999;color:#fff;font-family:arial}h1,div{color: #000;text-indent:0}a{color:blue}h1,canvas{position:absolute;left:10px}canvas{overflow:hidden;top:80px;-webkit-transform:scale(4);transform:scale(4);-webkit-transform-origin:0 0;transform-origin:0 0}h1{top:0;text-indent:0}div{position:absolute;top:250px}


--------------------------------------------------------------------------------
/.gitignore:
--------------------------------------------------------------------------------
  1 | #################
  2 | ## Eclipse
  3 | #################
  4 | 
  5 | *.pydevproject
  6 | .project
  7 | .metadata
  8 | bin/
  9 | tmp/
 10 | *.tmp
 11 | *.bak
 12 | *.swp
 13 | *~.nib
 14 | local.properties
 15 | .classpath
 16 | .settings/
 17 | .loadpath
 18 | 
 19 | # External tool builders
 20 | .externalToolBuilders/
 21 | 
 22 | # Locally stored "Eclipse launch configurations"
 23 | *.launch
 24 | 
 25 | # CDT-specific
 26 | .cproject
 27 | 
 28 | # PDT-specific
 29 | .buildpath
 30 | 
 31 | 
 32 | #################
 33 | ## Visual Studio
 34 | #################
 35 | 
 36 | ## Ignore Visual Studio temporary files, build results, and
 37 | ## files generated by popular Visual Studio add-ons.
 38 | 
 39 | # User-specific files
 40 | *.suo
 41 | *.user
 42 | *.sln.docstates
 43 | 
 44 | # Build results
 45 | 
 46 | [Dd]ebug/
 47 | [Rr]elease/
 48 | x64/
 49 | build/
 50 | [Bb]in/
 51 | [Oo]bj/
 52 | 
 53 | # MSTest test Results
 54 | [Tt]est[Rr]esult*/
 55 | [Bb]uild[Ll]og.*
 56 | 
 57 | *_i.c
 58 | *_p.c
 59 | *.ilk
 60 | *.meta
 61 | *.obj
 62 | *.pch
 63 | *.pdb
 64 | *.pgc
 65 | *.pgd
 66 | *.rsp
 67 | *.sbr
 68 | *.tlb
 69 | *.tli
 70 | *.tlh
 71 | *.tmp
 72 | *.tmp_proj
 73 | *.log
 74 | *.vspscc
 75 | *.vssscc
 76 | .builds
 77 | *.pidb
 78 | *.log
 79 | *.scc
 80 | 
 81 | # Visual C++ cache files
 82 | ipch/
 83 | *.aps
 84 | *.ncb
 85 | *.opensdf
 86 | *.sdf
 87 | *.cachefile
 88 | 
 89 | # Visual Studio profiler
 90 | *.psess
 91 | *.vsp
 92 | *.vspx
 93 | 
 94 | # Guidance Automation Toolkit
 95 | *.gpState
 96 | 
 97 | # ReSharper is a .NET coding add-in
 98 | _ReSharper*/
 99 | *.[Rr]e[Ss]harper
100 | 
101 | # TeamCity is a build add-in
102 | _TeamCity*
103 | 
104 | # DotCover is a Code Coverage Tool
105 | *.dotCover
106 | 
107 | # NCrunch
108 | *.ncrunch*
109 | .*crunch*.local.xml
110 | 
111 | # Installshield output folder
112 | [Ee]xpress/
113 | 
114 | # DocProject is a documentation generator add-in
115 | DocProject/buildhelp/
116 | DocProject/Help/*.HxT
117 | DocProject/Help/*.HxC
118 | DocProject/Help/*.hhc
119 | DocProject/Help/*.hhk
120 | DocProject/Help/*.hhp
121 | DocProject/Help/Html2
122 | DocProject/Help/html
123 | 
124 | # Click-Once directory
125 | publish/
126 | 
127 | # Publish Web Output
128 | *.Publish.xml
129 | *.pubxml
130 | 
131 | # NuGet Packages Directory
132 | ## TODO: If you have NuGet Package Restore enabled, uncomment the next line
133 | #packages/
134 | 
135 | # Windows Azure Build Output
136 | csx
137 | *.build.csdef
138 | 
139 | # Windows Store app package directory
140 | AppPackages/
141 | 
142 | # Others
143 | sql/
144 | *.Cache
145 | ClientBin/
146 | [Ss]tyle[Cc]op.*
147 | ~$*
148 | *~
149 | *.dbmdl
150 | *.[Pp]ublish.xml
151 | *.pfx
152 | *.publishsettings
153 | 
154 | # RIA/Silverlight projects
155 | Generated_Code/
156 | 
157 | # Backup & report files from converting an old project file to a newer
158 | # Visual Studio version. Backup files are not needed, because we have git ;-)
159 | _UpgradeReport_Files/
160 | Backup*/
161 | UpgradeLog*.XML
162 | UpgradeLog*.htm
163 | 
164 | # SQL Server files
165 | App_Data/*.mdf
166 | App_Data/*.ldf
167 | 
168 | #############
169 | ## Windows detritus
170 | #############
171 | 
172 | # Windows image file caches
173 | Thumbs.db
174 | ehthumbs.db
175 | 
176 | # Folder config file
177 | Desktop.ini
178 | 
179 | # Recycle Bin used on file shares
180 | $RECYCLE.BIN/
181 | 
182 | # Mac crap
183 | .DS_Store
184 | 
185 | 
186 | #############
187 | ## Python
188 | #############
189 | 
190 | *.py[co]
191 | 
192 | # Packages
193 | *.egg
194 | *.egg-info
195 | dist/
196 | build/
197 | eggs/
198 | parts/
199 | var/
200 | sdist/
201 | develop-eggs/
202 | .installed.cfg
203 | 
204 | # Installer logs
205 | pip-log.txt
206 | 
207 | # Unit test / coverage reports
208 | .coverage
209 | .tox
210 | 
211 | #Translations
212 | *.mo
213 | 
214 | #Mr Developer
215 | .mr.developer.cfg
216 | 


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/c8.html:
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  1 | <canvas id=C width=64></canvas><a href=//github.com/xem/chip8><img style="position:absolute;top:0;right:0;border:0;" src="https://s3.amazonaws.com/github/ribbons/forkme_right_darkblue_121621.png" alt="Fork me on GitHub"></a><h1>1kb chip8 emulator</h1><h2>Commented cource code, with sound</h2><div><a href=.>Homepage</a><br><br>Choose a ROM:<br><a href="c8.html?1#ROM/C8PIC.ch8">C8PIC</a><br><a href="c8.html?2#ROM/IBM.ch8">IBM</a><br><a href="c8.html?3#ROM/Rocket2.ch8">Rocket2</a> (press Y to launch)<br><a href="c8.html?4#ROM/X-MIRROR.ch8">X-MIRROR</a> (press 2,4,6,8 to draw)<br><a href="c8.html?5#ROM/TAPEWORM.ch8">TAPEWORM</a> (Y to start, 2,4,6,8 to move)<br><a href="c8.html?6#ROM/TIMEBOMB.ch8">TIMEBOMB</a> (set up with 2 and 8, start with 5)<br><a href="c8.html?8#ROM/AIRPLANE.ch8">AIRPLANE</a> (send bombs with 2)<br><a href="c8.html?10#ROM/BLITZ.ch8">BLITZ</a> (send bombs with 2)<br><a href="c8.html?11#ROM/BREAKOUT.ch8">BREAKOUT</a> (move with 4 and 6)<br><a href="c8.html?12#ROM/BRIX.ch8">BRIX</a> (move with 4 and 6)<br><a href="c8.html?13#ROM/CAVE.ch8">CAVE</a> (start with Y, move with 2,4,6,8)<br><a href="c8.html?14#ROM/CONNECT4.ch8">CONNECT4</a><br><a href="c8.html?15#ROM/FIGURES.ch8">FIGURES</a><br><a href="c8.html?16#ROM/FILTER.ch8">FILTER</a><br><a href="c8.html?17#ROM/GUESS.ch8">GUESS</a><br><a href="c8.html?18#ROM/HIDDEN.ch8">HIDDEN</a><br><a href="c8.html?19#ROM/INVADERS.ch8">INVADERS</a><br><a href="c8.html?20#ROM/KALEID.ch8">KALEID</a><br><a href="c8.html?21#ROM/LANDING.ch8">LANDING</a><br><a href="c8.html?22#ROM/MAZE.ch8">MAZE</a><br><a href="c8.html?23#ROM/MERLIN.ch8">MERLIN</a><br><a href="c8.html?24#ROM/MISSILE.ch8">MISSILE</a><br><a href="c8.html?25#ROM/PADDLES.ch8">PADDLES</a><br><a href="c8.html?26#ROM/PONG (1P).ch8">PONG (1P)</a><br><a href="c8.html?27#ROM/PONG.ch8">PONG</a><br><a href="c8.html?28#ROM/PONG2.ch8">PONG2</a><br><a href="c8.html?29#ROM/PUZZLE.ch8">PUZZLE</a><br><a href="c8.html?30#ROM/ROCKET.ch8">ROCKET</a><br><a href="c8.html?31#ROM/SOCCER.ch8">SOCCER</a><br><a href="c8.html?32#ROM/SPACEF.ch8">SPACEF</a><br><a href="c8.html?33#ROM/SQUASH.ch8">SQUASH</a><br><a href="c8.html?34#ROM/SYZYGY.ch8">SYZYGY</a><br><a href="c8.html?35#ROM/TANK.ch8">TANK</a><br><a href="c8.html?36#ROM/TETRIS.ch8">TETRIS</a><br><a href="c8.html?37#ROM/TICTAC.ch8">TICTAC</a><br><a href="c8.html?38#ROM/TRON.ch8">TRON</a><br><a href="c8.html?39#ROM/UFO.ch8">UFO</a><br><a href="c8.html?40#ROM/VBRIX.ch8">VBRIX</a><br><a href="c8.html?41#ROM/VERS.ch8">VERS</a><br><a href="c8.html?42#ROM/WALL.ch8">WALL</a><br><a href="c8.html?43#ROM/WIPEOFF.ch8">WIPEOFF</a><br><br></div><style>*{text-indent:-9999;color:#fff;font-family:arial}h1,h2,div{color: #000;text-indent:0}a{color:blue}h1,h2,canvas{position:absolute;left:10px}canvas{overflow:hidden;top:100px;-webkit-transform:scale(4);transform:scale(4);-webkit-transform-origin:0 0;transform-origin:0 0}h1{top:0;text-indent:0}h2{top:40px;text-indent:0}div{position:absolute;top:250px}</style><script>
  2 | /** Initialization **/
  3 | 
  4 | // Vars
  5 | var imageData, audio, oscillator, i, memory, stack, pc, sp, I, timer, sound_timer, keys, keys_pressed, xhr, opcodes, tmp, opcode, interval, prefix, NNN, NN, N, X, Y, VX, VY, value, i, j, x, y;
  6 | 
  7 | // Canvas
  8 | 
  9 | // The context2D (C) already exists
 10 | imageData = (C = C.getContext("2d")).createImageData(64, 32);
 11 | 
 12 | // The canvas is white. The pixels are black. We just have to toggle their opacity to render black or white
 13 | for(i=64*32*4; i--;){
 14 |   imageData.data[i] = i%4-3 ? 0 : 255;
 15 | }
 16 | 
 17 | // Audio
 18 | audio = new (AudioContext = this.AudioContext || webkitAudioContext || 0);
 19 | 
 20 | // Memory
 21 | memory = [];
 22 | 
 23 | // Sprites of the characters 0-9,A-F (8*5px) are placed in the 160 first c8es of memory: 0xF0, 0x90, ...
 24 | for(i=80; i--;){
 25 |   memory[i] = eval("0x" + "F999F26227F1F8FF1F1F99F11F8F1FF8F9FF1244F9F9FF9F1FF9F99E9E9EF888FE999EF8F8FF8F88"[i] + "0");
 26 | }
 27 | 
 28 | // Registers
 29 | V = new Uint8Array(new ArrayBuffer(16));
 30 | 
 31 | // Stack
 32 | stack = [];
 33 | 
 34 | // Program counter
 35 | pc = 512;
 36 | 
 37 | // Stack pointer
 38 | sp = 0;
 39 | 
 40 | // Address register
 41 | I = 0;
 42 | 
 43 | // Timer
 44 | timer = 0;
 45 | 
 46 | // Sound timer
 47 | sound_timer = 0;
 48 | 
 49 | /** Detect keys pressed **/
 50 | 
 51 | // key map (keycodes to use for each chip8 key: numpad0-9 + QWERTY)
 52 | keys = [96,103,104,105,100,101,102,97,98,99,81,87,69,82,84,89];
 53 | 
 54 | // Keys currently pressed
 55 | keys_pressed = [];
 56 | 
 57 | /** Load ROM **/
 58 | 
 59 | xhr = new XMLHttpRequest;
 60 | xhr.open('GET', location.hash.slice(1));
 61 | xhr.responseType = 'arraybuffer';
 62 | xhr.send();
 63 | xhr.onload = function(){
 64 | 
 65 |   // Put ROM in memory
 66 |   for(i=(tmp = new Uint8Array(xhr.response)).length; i--;){
 67 |     memory[i+512] = tmp[i];
 68 |   }
 69 | 
 70 |   /** Loop **/
 71 |   interval = setInterval(function(){
 72 | 
 73 |     // Decrement the timers while > 0
 74 |     timer && timer--;
 75 |     sound_timer && sound_timer--;
 76 | 
 77 |     // Start sound if sound timer > 0
 78 |     if(audio && sound_timer && !oscillator){
 79 | 
 80 |       // New oscillator
 81 |       oscillator = audio.createOscillator();
 82 | 
 83 |       // Cross-browser start/stop
 84 |       if(!oscillator.start){
 85 |         oscillator.noteOn = oscillator.start;
 86 |       }
 87 |       if(!oscillator.stop){
 88 |         oscillator.noteOff = oscillator.stop;
 89 |       }
 90 | 
 91 |       // Start sound
 92 |       oscillator.connect(audio.destination);
 93 |       oscillator.type = 3;
 94 |       oscillator.start(0);
 95 |     }
 96 | 
 97 |     // Stop sound if sound timer == 0
 98 |     if(audio && !sound_timer && oscillator){
 99 |       oscillator.stop(0);
100 |       oscillator = 0;
101 |     }
102 | 
103 |     // Execute 4 opcodes
104 |     for(opcodes = 4; opcodes--;){
105 | 
106 |       // Read opcode
107 |       opcode = memory[pc] << 8 | memory[pc+1];
108 |       //console.log("@"+pc + ": "+("00" + opcode.toString(16)).slice(-4));
109 | 
110 |       // Read opcode fields
111 |       prefix = opcode >> 12;
112 |       NNN = opcode & 0xFFF;
113 |       NN = opcode & 0xFF;
114 |       N = opcode & 0xF;
115 |       X = opcode >> 8 & 0xF;
116 |       VX = V[X];
117 |       VY = V[opcode >> 4 & 0xF];
118 | 
119 |       // 00E0: clear
120 |       if(opcode == 0xE0){
121 |         for(i = 64*32*4; i--;){
122 |           imageData.data[i] = i%4-3 ? 0 : 255;
123 |         }
124 |       }
125 | 
126 |       // 00EE: return from subprogram
127 |       if(opcode == 0xEE){
128 |         pc = stack.pop();
129 |       }
130 | 
131 |       // 1NNN: jump to NNN
132 |       if(prefix == 1){
133 |         pc = NNN - 2;
134 |       }
135 | 
136 |       // 2NNN: call subprogram at NNN
137 |       if(prefix == 2){
138 |         stack.push(pc);
139 |         pc = NNN - 2;
140 |       }
141 | 
142 |       // 3XNN: ignore next opcode if VX == NN
143 |       // 4XNN: ignore next opcode if VX != NN
144 |       // 5XY0: ignore next opcode if VX == VY
145 |       // 9XY0: ignore next opcode if VX != VY
146 |       // EX9E: ignore next opcode if VX is pressed
147 |       // EXA1: ignore next opcode if VX is not pressed
148 |       if((prefix == 3 && VX == NN)
149 |       || (prefix == 4 && VX != NN)
150 |       || (prefix == 5 && VX == VY)
151 |       || (prefix == 9 && VX != VY)
152 |       || (prefix == 0xE && ((NN == 0x9E && keys_pressed[VX]) || (NN == 0xA1 && !keys_pressed[VX])))
153 |       ){
154 |         pc += 2;
155 |       }
156 | 
157 |       // 6XNN: set VX to NN
158 |       if(prefix == 6){
159 |         V[X] = NN;
160 |       }
161 | 
162 |       // 7XNN: add NN to VX
163 |       if(prefix == 7){
164 |         V[X] = VX + NN;
165 |       }
166 | 
167 |       // 8XYN:
168 |       if(prefix == 8){
169 | 
170 |         // 8XY0: set VX to VY
171 |         if(!N){
172 |           V[X] = VY;
173 |         }
174 | 
175 |         // 8XY1: set VX to VX OR VY
176 |         if(N == 1){
177 |           V[X] |= VY;
178 |         }
179 | 
180 |         // 8XY2: set VX to VX AND VY
181 |         if(N == 2){
182 |           V[X] &= VY;
183 |         }
184 | 
185 |         // 8XY3: set VX to VX XOR VY
186 |         if(N == 3){
187 |           V[X] ^= VY;
188 |         }
189 | 
190 |         // 8XY4: add VY to VX, put carry in VF
191 |         if(N == 4){
192 |           V[0xF] = +((V[X] += VY) > 0xFF);
193 |         }
194 | 
195 |         // 8XY5: substract VY to VX, put NOT borrow in VF
196 |         if(N == 5){
197 |           V[0xF] = +((V[X] -= VY) >= 0);
198 |         }
199 | 
200 |         // 8XY6: right shift VX, put shifted bit in VF
201 |         if(N == 6){
202 |           V[0xF] = VX & 0x1;
203 |           V[X] /= 2;
204 |         }
205 | 
206 |         // 8XY7: VX = VY - VX, put NOT borrow in VF
207 |         if(N == 7){
208 |           V[0xF] = +((V[X] = VY - VX) >= 0);
209 |         }
210 | 
211 |         // 8XYE: left shift VX, put shifted bit in VF
212 |         if(N == 0xE){
213 |           V[0xF] = VX >> 7;
214 |           V[X] *= 2;
215 |         }
216 |       }
217 | 
218 |       // ANNN: set I to NNN
219 |       if(prefix == 0xA){
220 |         I = NNN;
221 |       }
222 | 
223 |       // BNNN: jump to NNN + V0
224 |       if(prefix == 0xB){
225 |         pc = NNN + V[0];
226 |       }
227 | 
228 |       // CXNN: set VX to a random number < NN
229 |       if(prefix == 0xC){
230 |         V[X] = Math.floor(Math.random() * NN);
231 |       }
232 | 
233 |       // DXYN: draw the 8*N px sprite stored at address I at coordinates [X:Y]
234 |       if(prefix == 0xD){
235 | 
236 |         V[0xF] = 0;
237 | 
238 |         // Loop on the N lines of the sprite
239 |         for(i = N; i--;){
240 | 
241 |           // Loop on the 8 pixels of the current line of the sprite
242 |           for(j = 8; j--;){
243 | 
244 |             // Get the value of the pixel
245 |             value = (memory[I+i]>>(7-j))&0x1;
246 | 
247 |             // Get the coordinates of the pixel
248 |             x = VX + j;
249 |             y = VY + i;
250 | 
251 |             // If the pixel is on
252 |             if(value){
253 | 
254 |               // If the pixel is out of bounds, wrap
255 |               if(x > 63){
256 |                 x -= 63;
257 |               }
258 | 
259 |               if(y > 31){
260 |                 y -= 31;
261 |               }
262 | 
263 |               // If the pixel is already white (opacity == 0), make it black and set VF to 1. Else, make it white.
264 |               tmp = 4*(64*y+x)+3;
265 |               if(imageData.data[tmp]){
266 |                 imageData.data[tmp] = 0;
267 |               }
268 |               else{
269 |                 imageData.data[tmp] = 255;
270 |                 V[0xF] = 1;
271 |               }
272 |             }
273 |           }
274 |         }
275 |       }
276 | 
277 |       // FXNN:
278 |       if(prefix == 0xF){
279 | 
280 |         // FX07: set VX to the timer value
281 |         if(NN == 0x07){
282 |           V[X] = timer;
283 |         }
284 | 
285 |         // FX0A: prompt, store key pressed in VX
286 |         if(NN == 0x0A){
287 | 
288 |           // Loop until VX != -1
289 |           if(!~(V[X] = keys_pressed.c8Of(!0))){
290 |             pc -= 2;
291 |           }
292 |         }
293 | 
294 |         // FX15: set timer to VX
295 |         if(NN == 0x15){
296 |           timer = VX;
297 |         }
298 | 
299 |         // FX18: set sound timer to VX
300 |         if(NN == 0x18){
301 |           sound_timer = VX;
302 |         }
303 | 
304 |         // FX1E: add VX to I, set VF to I's overflow (I>0xFFF)
305 |         if(NN == 0x1E){
306 |           I += VX;
307 |           V[0xF] = +(I > 0xFFF);
308 |           I &= 0xFFF;
309 |         }
310 | 
311 |         // FX29: set I to the character VX
312 |         if(NN == 0x29){
313 |           I = VX * 5;
314 |         }
315 | 
316 |         // FX33: store the decimal value of VX in memory at address I (hundreds), I+1 (dozens), I+2 (units)
317 |         if(NN == 0x33){
318 |           for(i = 3; i--;){
319 |             memory[I+i]=(""+VX)[i];
320 |           }
321 |         }
322 | 
323 |         // FX55: store V0 to VX in memory from address I
324 |         if(NN == 0x55){
325 |           for(i = X; i--;){
326 |             memory[I + i] = V[i];
327 |           }
328 |         }
329 | 
330 |         // FX65: load V0 to VX from memory at address I
331 |         if(NN == 0x65){
332 |           for(i = X; i--;){
333 |             V[i] = memory[I + i];
334 |           }
335 |         }
336 |       }
337 | 
338 |       // Next instruction
339 |       pc += 2;
340 |     }
341 | 
342 |     // Refresh screen
343 |     C.putImageData(imageData, 0, 0);
344 | 
345 |   },16);
346 | }
347 | 
348 | onkeydown = function(e){
349 |   keys_pressed[keys.indexOf(e.keyCode)] = !0;
350 | }
351 | 
352 | onkeyup = function(e){
353 |   keys_pressed[keys.indexOf(e.keyCode)] = !1;
354 | }
355 | </script>


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