robotron driver

This commit is contained in:
Steven Hugg 2017-01-20 17:54:02 -05:00
parent 17370248ee
commit f696f22b5a
5 changed files with 251 additions and 79 deletions

View File

@ -281,6 +281,7 @@ canvas.pixelated {
<script src="tss/js/Log.js"></script>
<script src="local/williams/defender.js"></script>
<script src="local/williams/robotron.js"></script>
<script src="src/emu.js"></script>
<script src="src/util.js"></script>

View File

@ -107,7 +107,7 @@ var flagsNZ = [
var setV8 = function(a,b,r) {CC |= (((a^b^r^(r>>1))&0x80)>>6);};
var setV16 = function(a,b,r) {CC |= (((a^b^r^(r>>1))&0x8000)>>14);};
var getD = function() {return rA*256+rB;};
var getD = function() {return (rA<<8)+rB;};
var setD = function(v) {rA = (v>>8)& 0xff;rB=v&0xff;};
var PUSHB = function(b) {
byteTo(--rS, b & 0xff);
@ -595,6 +595,7 @@ var oCOM = function(b) {
CC &= ~(F_ZERO | F_NEGATIVE | F_OVERFLOW);
b ^= 0xff;
CC |= flagsNZ[b];
CC |= F_CARRY;
return b;
};
@ -607,10 +608,6 @@ var dpadd = function() {
var step = function() {
var oldT = T;
if (IRQs) {
//;;;
}
var addr = null;
var pb = null;
@ -819,7 +816,7 @@ var step = function() {
break;
case 0x3B: //RTI
CC = PULLB();
if (cc & F_ENTIRE) {
if (CC & F_ENTIRE) {
T+=9;
rA = PULLB();
rB = PULLB();
@ -1437,7 +1434,7 @@ var step = function() {
case 0xDE: //LDU direct
addr = dpadd();
rU = ReadWord(addr);
flagsNZ16(rX);
flagsNZ16(rU);
CC&=~F_OVERFLOW;
break;
case 0xDF: //STU direct
@ -2248,17 +2245,17 @@ var disasm = function(i,a,b,c,d,pc) {
case 0: //invalid
break;
case 1: //direct page
mnemo+=" $"+toHex2(a); break;
mnemo+="\t$"+toHex2(a); break;
case 2: // inherent
break;
case 3: //brel16
mnemo+=" #$"+toHex4((a*256+b)<32768 ? (a*256+b+pc):(a*256+b+pc-65536)); break;
mnemo+="\t#$"+toHex4((a*256+b)<32768 ? (a*256+b+pc):(a*256+b+pc-65536)); break;
case 4: //imm8
mnemo+=" #$"+toHex2(a); break;
mnemo+="\t#$"+toHex2(a); break;
case 5: //brel8
mnemo+=" #$"+toHex4((a)<128 ? (a+pc+2):(a+pc-254)); break;
mnemo+="\t#$"+toHex4((a)<128 ? (a+pc+2):(a+pc-254)); break;
case 6: //indexed, postbyte etc.
mnemo+=' ';
mnemo+='\t';
var pb = a;
var ixr = ["X","Y","U","S"][(pb & 0x60)>>5];
if (!(pb & 0x80)) {
@ -2314,9 +2311,9 @@ var disasm = function(i,a,b,c,d,pc) {
break;
case 7: //extended
mnemo+=" $"+toHex4(a*256+b); break;
mnemo+="\t$"+toHex4(a*256+b); break;
case 8: //imm16
mnemo+=" #$"+toHex4(a*256+b); break;
mnemo+="\t#$"+toHex4(a*256+b); break;
case 10: //pshs, puls
rx = ['PC','U','Y','X','DP','B','A','CC'];
@ -2325,7 +2322,7 @@ var disasm = function(i,a,b,c,d,pc) {
if ((a & 1)!==0) {ro.push(rx[7-j]);}
a>>=1;
}
mnemo += ' '+ro.join(',');
mnemo += '\t'+ro.join(',');
break;
case 11: //pshs, puls
rx = ['PC','S','Y','X','DP','B','A','CC'];
@ -2334,11 +2331,11 @@ var disasm = function(i,a,b,c,d,pc) {
if ((a & 1)!==0) {ro.push(rx[7-j]);}
a>>=1;
}
mnemo += ' '+ro.join(',');
mnemo += '\t'+ro.join(',');
break;
case 20: //TFR etc
rx = ['D','X','Y','U','S','PC','?','?','A','B','CC','DP','?','?','?','?'];
mnemo += ' '+rx[a>>4]+','+rx[a&0x0f];
mnemo += '\t'+rx[a>>4]+','+rx[a&0x0f];
break;
}
@ -2397,6 +2394,7 @@ return {
PUSHB(CC);
CC |= F_IRQMASK | F_FIRQMASK;
PC = ReadWord(vecFIRQ);
T += 9;
},
interrupt: function() {
if (CC & F_IRQMASK) return;
@ -2411,6 +2409,7 @@ return {
PUSHB(CC);
CC |= F_IRQMASK;
PC = ReadWord(vecIRQ);
T += 18;
},
nmi: function() {
PUSHW(PC);
@ -2424,6 +2423,7 @@ return {
PUSHB(CC);
CC |= F_IRQMASK | F_FIRQMASK;
PC = ReadWord(vecNMI);
T += 18;
},
set:function(reg,value) {
switch (reg.toUpperCase()) {
@ -2445,7 +2445,7 @@ return {
}
return f;
},
disasm: disasm,
disasm: disasm
};
};

View File

@ -533,9 +533,10 @@ var BaseZ80Platform = function() {
this.resume();
}
this.restartDebugState = function() {
if (debugCondition && !debugBreakState && debugTargetClock > 0) {
if (debugCondition && !debugBreakState) {
debugSavedState = this.saveState();
debugTargetClock -= debugSavedState.c.T;
if (debugTargetClock > 0)
debugTargetClock -= debugSavedState.c.T;
debugSavedState.c.T = 0;
this.loadState(debugSavedState);
}
@ -636,7 +637,7 @@ var BaseZ80Platform = function() {
function cpuStateToLongString_6809(c) {
function decodeFlags(flags) {
var flagspec = "SZ-H-VNC";
var flagspec = "EFHINZVC";
var s = "";
for (var i=0; i<8; i++)
s += (flags & (128>>i)) ? flagspec.slice(i,i+1) : "-";
@ -644,6 +645,11 @@ function cpuStateToLongString_6809(c) {
}
return "PC " + hex(c.PC,4) + " " + decodeFlags(c.CC) + "\n"
+ "SP " + hex(c.SP,4) + "\n"
+ " A " + hex(c.A,2) + "\n"
+ " B " + hex(c.B,2) + "\n"
+ " X " + hex(c.X,4) + "\n"
+ " Y " + hex(c.Y,4) + "\n"
+ " U " + hex(c.U,4) + "\n"
;
}
@ -658,9 +664,9 @@ var Base6809Platform = function() {
return true;
var op = self.readAddress(c.PC);
// TODO: 6809 opcodes
if (op == 0xcd) // CALL
if (op == 0x9d || op == 0xad || op == 0xbd) // CALL
depth++;
else if (op == 0xc0 || op == 0xc8 || op == 0xc9 || op == 0xd0) // RET (TODO?)
else if (op == 0x3b || op == 0x39) // RET (TODO?)
--depth;
return false;
});

View File

@ -7,13 +7,20 @@ var WilliamsPlatform = function(mainElement) {
var self = this;
this.__proto__ = new Base6809Platform();
var cpu, ram, membus, iobus, rom, nvram;
var video, timer, pixels, displayPCs;
var SCREEN_HEIGHT = 304;
var SCREEN_WIDTH = 256;
var cpu, ram, rom, nvram;
var portsel = 0;
var banksel = 0;
var watchdog_counter;
var video_counter;
var pia6821 = [0,0,0,0,0,0,0,0];
var pia6821 = new RAM(8).mem;
var blitregs = new RAM(8).mem;
var video, timer, pixels, displayPCs;
var membus, iobus;
var screenNeedsRefresh = false;
var video_counter;
var xtal = 12000000;
var cpuFrequency = xtal/3/4;
@ -22,7 +29,7 @@ var WilliamsPlatform = function(mainElement) {
var PIXEL_ON = 0xffeeeeee;
var PIXEL_OFF = 0xff000000;
var KEYCODE_MAP = makeKeycodeMap([
var DEFENDER_KEYCODE_MAP = makeKeycodeMap([
[Keys.VK_SPACE, 4, 0x1],
[Keys.VK_RIGHT, 4, 0x2],
[Keys.VK_Z, 4, 0x4],
@ -38,6 +45,23 @@ var WilliamsPlatform = function(mainElement) {
[Keys.VK_9, 0, 0x8],
]);
var ROBOTRON_KEYCODE_MAP = makeKeycodeMap([
[Keys.VK_W, 0, 0x1],
[Keys.VK_S, 0, 0x2],
[Keys.VK_A, 0, 0x4],
[Keys.VK_D, 0, 0x8],
[Keys.VK_1, 0, 0x10],
[Keys.VK_2, 0, 0x20],
[Keys.VK_UP, 0, 0x40],
[Keys.VK_DOWN, 0, 0x80],
[Keys.VK_LEFT, 2, 0x1],
[Keys.VK_RIGHT, 2, 0x2],
[Keys.VK_7, 4, 0x1],
[Keys.VK_8, 4, 0x2],
[Keys.VK_5, 4, 0x4],
[Keys.VK_9, 4, 0x8],
]);
var palette = [];
for (var ii=0; ii<16; ii++)
palette[ii] = 0xff000000;
@ -46,74 +70,205 @@ var WilliamsPlatform = function(mainElement) {
return WILLIAMS_PRESETS;
}
var ioread = new AddressDecoder([
// Defender
var ioread_defender = new AddressDecoder([
[0x400, 0x5ff, 0x1ff, function(a) { return nvram.mem[a]; }],
[0x800, 0x800, 0, function(a) { return video_counter; }],
[0xc00, 0xc07, 0x7, function(a) { return pia6821[a]; }],
[0x0, 0xfff, 0, function(a) { console.log('ioread',hex(a)); }],
]);
var iowrite = new AddressDecoder([
[0x0, 0xf, 0xf, function(a,v) {
// RRRGGGBB
var color = 0xff000000 | ((v&7)<<5) | (((v>>3)&7)<<13) | (((v>>6)<<22));
if (color != palette[a]) {
palette[a] = color;
screenNeedsRefresh = true;
}
}],
[0x3fc, 0x3ff, 0, function(a,v) { if (v == 56) watchdog_counter = INITIAL_WATCHDOG; }], // TODO: check value?
var iowrite_defender = new AddressDecoder([
[0x0, 0xf, 0xf, setPalette],
[0x3fc, 0x3ff, 0, function(a,v) { if (v == 0x38) watchdog_counter = INITIAL_WATCHDOG; }],
[0x400, 0x5ff, 0x1ff, function(a,v) { nvram.mem[a] = v; }],
[0xc00, 0xc07, 0x7, function(a,v) { pia6821[a] = v; }],
[0x0, 0xfff, 0, function(a,v) { console.log('iowrite',hex(a),hex(v)); }],
]);
var memread_defender = new AddressDecoder([
[0x0000, 0xbfff, 0xffff, function(a) { return ram.mem[a]; }],
[0xc000, 0xcfff, 0x0fff, function(a) {
switch (banksel) {
case 0: return ioread_defender(a);
case 1: return rom[a+0x3000];
case 2: return rom[a+0x4000];
case 3: return rom[a+0x5000];
case 7: return rom[a+0x6000];
default: return 0; // TODO: error light
}
}],
[0xd000, 0xffff, 0xffff, function(a) { return rom ? rom[a-0xd000] : 0; }],
]);
var memwrite_defender = new AddressDecoder([
[0x0000, 0x97ff, 0, write_display_byte],
[0x9800, 0xbfff, 0, function(a,v) { ram.mem[a] = v; }],
[0xc000, 0xcfff, 0x0fff, iowrite_defender],
[0xd000, 0xdfff, 0, function(a,v) { banksel = v&0x7; }],
[0, 0xffff, 0, function(a,v) { console.log(hex(a), hex(v)); }],
]);
// Robotron, Joust, Bubbles, Stargate
var ioread_williams = new AddressDecoder([
[0x804, 0x807, 0x3, function(a) { return pia6821[a]; }],
[0x80c, 0x80f, 0x3, function(a) { return pia6821[a+4]; }],
[0xb00, 0xbff, 0, function(a) { return video_counter; }],
[0xc00, 0xfff, 0x3ff, function(a) { return nvram.mem[a]; }],
[0x0, 0xfff, 0, function(a) { console.log('ioread',hex(a)); }],
]);
var iowrite_williams = new AddressDecoder([
[0x0, 0xf, 0xf, setPalette],
[0x804, 0x807, 0x3, function(a,v) { console.log('iowrite',a); }], // TODO: sound
[0x80c, 0x80f, 0x3, function(a,v) { console.log('iowrite',a+4); }], // TODO: sound
[0x900, 0x9ff, 0, function(a,v) { banksel = v & 0x1; }],
[0xa00, 0xa07, 0x7, setBlitter],
[0xbff, 0xbff, 0, function(a,v) { if (v == 0x39) watchdog_counter = INITIAL_WATCHDOG; }],
[0xc00, 0xfff, 0x3ff, function(a,v) { nvram.mem[a] = v; }],
[0x0, 0xfff, 0, function(a,v) { console.log('iowrite',hex(a),hex(v)); }],
]);
var memread_williams = new AddressDecoder([
[0x0000, 0x8fff, 0xffff, function(a) { return banksel ? rom[a] : ram.mem[a]; }],
[0x9000, 0xbfff, 0xffff, function(a) { return ram.mem[a]; }],
[0xc000, 0xcfff, 0x0fff, ioread_williams],
[0xd000, 0xffff, 0xffff, function(a) { return rom ? rom[a-0x4000] : 0; }],
]);
var memwrite_williams = new AddressDecoder([
[0x0000, 0x8fff, 0, write_display_byte],
[0x9000, 0xbfff, 0, function(a,v) { ram.mem[a] = v; }],
[0xc000, 0xcfff, 0x0fff, iowrite_williams],
[0x0000, 0xffff, 0, function(a,v) { console.log(hex(a), hex(v)); }],
]);
// d1d6 ldu $11 / beq $d1ed
function setPalette(a,v) {
// RRRGGGBB
var color = 0xff000000 | ((v&7)<<5) | (((v>>3)&7)<<13) | (((v>>6)<<22));
if (color != palette[a]) {
palette[a] = color;
screenNeedsRefresh = true;
}
}
function write_display_byte(a,v) {
ram.mem[a] = v;
drawDisplayByte(a, v);
displayPCs[a] = cpu.getPC(); // save program counter
}
function drawDisplayByte(a,v) {
var ofs = ((a&0xff00)<<1) | ((a&0xff)^0xff);
pixels[ofs] = palette[v>>4];
pixels[ofs+256] = palette[v&0xf];
}
function setBlitter(a,v) {
if (a) {
blitregs[a] = v;
} else {
doBlit(v);
}
}
function doBlit(flags) {
//console.log(hex(flags), blitregs);
flags &= 0xff;
var offs = SCREEN_HEIGHT - blitregs[7];
var sstart = (blitregs[2] << 8) + blitregs[3];
var dstart = (blitregs[4] << 8) + blitregs[5];
var w = blitregs[6] ^ 4; // blitter bug fix
var h = blitregs[7] ^ 4;
if(w==0) w++;
if(h==0) h++;
if(h==255) h++;
var sxinc = (flags & 0x1) ? 256 : 1;
var syinc = (flags & 0x1) ? 1 : w;
var dxinc = (flags & 0x2) ? 256 : 1;
var dyinc = (flags & 0x2) ? 1 : w;
var pixdata = 0;
for (var y = 0; y < h; y++) {
var source = sstart & 0xffff;
var dest = dstart & 0xffff;
for (var x = 0; x < w; x++) {
var data = memread_williams(source);
if (flags & 0x20) {
pixdata = (pixdata << 8) | data;
blit_pixel(dest, (pixdata >> 4) & 0xff, flags);
} else {
blit_pixel(dest, data, flags);
}
source += sxinc;
source &= 0xffff;
dest += dxinc;
dest &= 0xffff;
}
if (flags & 0x2)
dstart = (dstart & 0xff00) | ((dstart + dyinc) & 0xff);
else
dstart += dyinc;
if (flags & 0x1)
sstart = (sstart & 0xff00) | ((sstart + syinc) & 0xff);
else
sstart += syinc;
}
return w * h * (2 + ((flags&0x4)!=0)); // # of memory accesses
}
function blit_pixel(dstaddr, srcdata, flags) {
var curpix = dstaddr < 0xc000 ? ram.mem[dstaddr] : memread_williams(dstaddr);
var solid = blitregs[1];
var keepmask = 0xff; //what part of original dst byte should be kept, based on NO_EVEN and NO_ODD flags
//even pixel (D7-D4)
if((flags & 0x8) && !(srcdata & 0xf0)) { //FG only and src even pixel=0
if(flags & 0x80) keepmask &= 0x0f; // no even
} else {
if(!(flags & 0x80)) keepmask &= 0x0f; // not no even
}
//odd pixel (D3-D0)
if((flags & 0x8) && !(srcdata & 0x0f)) { //FG only and src odd pixel=0
if(flags & 0x40) keepmask &= 0xf0; // no odd
} else {
if(!(flags & 0x40)) keepmask &= 0xf0; // not no odd
}
curpix &= keepmask;
if(flags & 0x10) // solid bit
curpix |= (solid & ~keepmask);
else
curpix |= (srcdata & ~keepmask);
memwrite_williams(dstaddr, curpix);
}
var trace = false;
var _traceinsns = {};
function _trace() {
var pc = cpu.getPC();
if (!_traceinsns[pc]) {
_traceinsns[pc] = 1;
console.log(hex(pc), cpu.T());
}
}
this.start = function() {
ram = new RAM(0xc000);
nvram = new RAM(0x200);
nvram = new RAM(0x400);
// TODO: save in browser storage?
nvram.mem.set([240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,242,241,242,247,240,244,244,245,242,244,250,240,241,248,243,241,245,245,243,244,241,244,253,240,241,245,249,242,240,244,252,244,245,244,244,240,241,244,242,248,245,245,240,244,247,244,244,240,241,242,245,242,240,244,243,245,242,244,242,240,241,241,240,243,245,244,253,245,242,245,243,240,240,248,242,246,245,245,243,245,243,245,242,240,240,246,240,241,240,245,244,244,253,244,248,240,240,245,250,240,241,240,240,240,243,240,243,240,241,240,244,240,241,240,241,240,240,240,240,240,240,240,245,241,245,240,241,240,245,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240]);
// defender nvram.mem.set([240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,242,241,242,247,240,244,244,245,242,244,250,240,241,248,243,241,245,245,243,244,241,244,253,240,241,245,249,242,240,244,252,244,245,244,244,240,241,244,242,248,245,245,240,244,247,244,244,240,241,242,245,242,240,244,243,245,242,244,242,240,241,241,240,243,245,244,253,245,242,245,243,240,240,248,242,246,245,245,243,245,243,245,242,240,240,246,240,241,240,245,244,244,253,244,248,240,240,245,250,240,241,240,240,240,243,240,243,240,241,240,244,240,241,240,241,240,240,240,240,240,240,240,245,241,245,240,241,240,245,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240,240]);
displayPCs = new Uint16Array(new ArrayBuffer(0x9800*2));
rom = padBytes(new lzgmini().decode(DEFENDER_ROM).slice(0), 0x7000);
rom = padBytes(new lzgmini().decode(ROBOTRON_ROM).slice(0), 0xc001);
membus = {
read: new AddressDecoder([
[0x0000, 0xbfff, 0xffff, function(a) { return ram.mem[a]; }],
[0xc000, 0xcfff, 0x0fff, function(a) {
switch (banksel) {
case 0: return ioread(a);
case 1: return rom[a+0x3000];
case 2: return rom[a+0x4000];
case 3: return rom[a+0x5000];
case 4:
case 5:
case 6:
case 7: return rom[a+0x6000];
default: return 0; // TODO: error light
}
}],
[0xd000, 0xffff, 0xffff, function(a) { return rom ? rom[a-0xd000] : 0; }],
]),
write: new AddressDecoder([
[0x9800, 0xbfff, 0, function(a,v) { ram.mem[a] = v; }],
[0x0000, 0x97ff, 0, function(a,v) {
ram.mem[a] = v;
drawDisplayByte(a, v);
displayPCs[a] = cpu.getPC(); // save program counter
}],
[0xc000, 0xcfff, 0x0fff, iowrite],
[0xd000, 0xdfff, 0, function(a,v) { banksel = v&0x7; }],
[0, 0xffff, 0, function(a,v) { console.log(hex(a), hex(v)); }],
]),
read: memread_williams,
write: memwrite_williams,
};
cpu = new CPU6809();
cpu.init(membus.write, membus.read, 0);
video = new RasterVideo(mainElement,256,304,{rotate:-90});
video = new RasterVideo(mainElement, SCREEN_WIDTH, SCREEN_HEIGHT, {rotate:-90});
video.create();
$(video.canvas).click(function(e) {
var x = Math.floor(e.offsetX * video.canvas.width / $(video.canvas).width());
@ -123,9 +278,9 @@ var WilliamsPlatform = function(mainElement) {
});
var idata = video.getFrameData();
video.setKeyboardEvents(function(key,code,flags) {
var o = KEYCODE_MAP[key];
var o = ROBOTRON_KEYCODE_MAP[key];
if (o) {
console.log(key,code,flags,o);
//console.log(key,code,flags,o);
if (flags & 1) {
pia6821[o.index] |= o.mask;
} else {
@ -140,14 +295,15 @@ var WilliamsPlatform = function(mainElement) {
var debugCond = self.getDebugCallback();
// interrupts happen every 1/4 of the screen
for (var quarter=0; quarter<4; quarter++) {
video_counter = (quarter & 1) ? 0xff : 0x00;
if (pia6821[7] == 0x3c) { // TODO?
video_counter = [0x00, 0x3c, 0xbc, 0xfc][quarter];
if (membus.read != memread_defender || pia6821[7] == 0x3c) { // TODO?
cpu.interrupt();
//console.log(cpu.getPC());
}
var targetTstates = cpu.T() + cpuCyclesPerFrame/4;
if (debugCond) {
if (debugCond || trace) {
while (cpu.T() < targetTstates) {
_trace();
if (debugCond && debugCond()) {
debugCond = null;
break;
@ -182,18 +338,22 @@ var WilliamsPlatform = function(mainElement) {
cpu.loadState(state.c);
ram.mem.set(state.b);
nvram.mem.set(state.nvram);
//pia6821.set(state.pia);
blitregs.set(state.blt);
watchdog_counter = state.wdc;
banksel = state.bs;
pia6821 = state.pia;
portsel = state.ps;
}
this.saveState = function() {
return {
c:self.getCPUState(),
b:ram.mem.slice(0),
nvram:nvram.mem.slice(0),
pia:pia6821.slice(0),
blt:blitregs.slice(0),
wdc:watchdog_counter,
bs:banksel,
pia:pia6821,
ps:portsel,
};
}
this.getRAMForState = function(state) {

View File

@ -766,7 +766,12 @@ function updateDisassembly() {
s += "; " + srclinenum + ":\t" + srcline + "\n";
}
}
var dline = hex(parseInt(a)) + "\t" + disasm.line + "\n";
var bytes = "";
for (var i=0; i<disasm.nbytes; i++)
bytes += hex(platform.readAddress(a+i));
while (bytes.length < 14)
bytes += ' ';
var dline = hex(parseInt(a)) + "\t" + bytes + "\t" + disasm.line + "\n";
s += dline;
if (a == pc) selline = curline;
curline++;