first cut of ijor's 6800
This commit is contained in:
BigEd
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/*
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Copyright (c) 2011 Ijor, Segher Boessenkool, Ed Spittles
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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var nodenames ={
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gnd: 663, // pads: ground
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vcc: 31, // pads: power
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phi1: 1507, // pads: phase 1 clock input
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phi2: 1511, // pads: phase 2 clock input
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reset: 1461, // pads: reset
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db0: 686, // pads: data bus
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db1: 683,
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db2: 677,
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db3: 676,
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db4: 669,
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db5: 670,
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db6: 664,
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db7: 691,
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ab0: 1854, // pads: address bus
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ab1: 1857,
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ab2: 1855,
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ab3: 1858,
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ab4: 1856,
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ab5: 1859,
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ab6: 1860,
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ab7: 1865,
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ab8: 1861,
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ab9: 1863,
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ab10: 1862,
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ab11: 1864,
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ab12: 1948,
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ab13: 1946,
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ab14: 1949,
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ab15: 1947,
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irq: 1496, // input pads: interrupt request (active low)
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nmi: 1501, // pads: non maskable interrupt (active low)
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dbe: 1456, // pads: data bus enable
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halt: 1492, // pads: halt (active low)
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tsc: 1459, // pads: tristate control
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rw: 1965, // output pads: read / not write
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vma: 1971, // pads: valid memory address
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ba: 1964, // pads: bus available
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//
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ir0: 1302, // internal state: Instruction Register
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ir1: 1290,
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ir2: 1296,
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ir3: 1297,
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ir4: 1298,
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ir5: 1299,
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ir6: 1278,
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ir7: 1279,
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}
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File diff suppressed because one or more lines are too long
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// chip-specific support functions
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//
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// may override function definitions made previously
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chipname='6800';
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grChipSize=7000;
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ngnd = nodenames['gnd'];
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npwr = nodenames['vcc'];
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nodenamereset = 'reset';
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presetLogLists=[
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['cycle','phi1','phi2'],
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['ab','db','rw','pc','a','b'],
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['ir'],
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['irq','nmi',nodenamereset],
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];
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function setupTransistors(){
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for(i in transdefs){
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var tdef = transdefs[i];
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var name = tdef[0];
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var gate = tdef[1];
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var c1 = tdef[2];
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var c2 = tdef[3];
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var bb = tdef[4];
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if(tdef[6])
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// just ignore all the 'weak' transistors for now
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continue;
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if(c1==ngnd) {c1=c2;c2=ngnd;}
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if(c1==npwr) {c1=c2;c2=npwr;}
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var trans = {name: name, on: false, gate: gate, c1: c1, c2: c2, bb: bb};
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nodes[gate].gates.push(trans);
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nodes[c1].c1c2s.push(trans);
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nodes[c2].c1c2s.push(trans);
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transistors[name] = trans;
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}
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}
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// simulate a single clock phase with no update to graphics or trace
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function halfStep(){
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var clk = isNodeHigh(nodenames['phi2']);
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eval(clockTriggers[cycle]);
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if (clk) {setLow('phi2'); handleBusRead(); setHigh('phi1'); }
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else {setHigh('phi1'); setLow('phi1'); setHigh('phi2'); handleBusWrite();}
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}
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function initChip(){
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var start = now();
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for(var nn in nodes) {
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nodes[nn].state = false;
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nodes[nn].float = true;
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}
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nodes[ngnd].state = false;
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nodes[ngnd].float = false;
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nodes[npwr].state = true;
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nodes[npwr].float = false;
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for(var tn in transistors) transistors[tn].on = false;
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setLow(nodenamereset);
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setHigh('phi1'); setLow('phi2');
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setHigh('dbe'); setLow('tsc'); setHigh('halt');
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setHigh('irq'); setHigh('nmi');
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recalcNodeList(allNodes());
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for(var i=0;i<8;i++){setLow('phi1'); setHigh('phi2'); setLow('phi2'); setHigh('phi1');}
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setHigh(nodenamereset);
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for(var i=0;i<18;i++){halfStep();} // avoid updating graphics and trace buffer before user code
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refresh();
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cycle = 0;
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trace = Array();
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if(typeof expertMode != "undefined")
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updateLogList();
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chipStatus();
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if(ctrace)console.log('initChip done after', now()-start);
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}
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function handleBusRead(){
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if(isNodeHigh(nodenames['rw'])){
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var a = readAddressBus();
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var d = eval(readTriggers[a]);
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if(d == undefined)
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d = mRead(readAddressBus());
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// we have no SYNC pin on 6800
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// if(isNodeHigh(nodenames['sync']))
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// eval(fetchTriggers[d]);
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writeDataBus(d);
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}
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}
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function chipStatus(){
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var ab = readAddressBus();
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var machine1 =
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' halfcyc:' + cycle +
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' phi0:' + readBit('phi2') +
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' AB:' + hexWord(ab) +
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' D:' + hexByte(readDataBus()) +
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' RnW:' + readBit('rw');
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/* 6800 machine state names are not in place yet */
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var machine2 = ''
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var machine3 = ''
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/*
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var machine2 =
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' PC:' + hexWord(readPC()) +
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' A:' + hexByte(readA()) +
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' X:' + hexByte(readX()) +
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' Y:' + hexByte(readY()) +
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' SP:' + hexByte(readSP()) +
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' ' + readPstring();
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*/
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var machine3 =
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'Hz: ' + estimatedHz().toFixed(1);
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/*
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if(typeof expertMode != "undefined") {
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machine3 += ' Exec: ' + busToString('Execute') + '(' + busToString('State') + ')';
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if(isNodeHigh(nodenames['sync']))
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machine3 += ' (Fetch: ' + busToString('Fetch') + ')';
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if(goldenChecksum != undefined)
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machine3 += " Chk:" + traceChecksum + ((traceChecksum==goldenChecksum)?" OK":" no match");
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}
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*/
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setStatus(machine1, machine2, machine3);
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if (loglevel>0) {
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updateLogbox(logThese);
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}
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selectCell(ab);
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}
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// This file testprogram.js can be substituted by one of several tests
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testprogramAddress=0x0000;
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// we want to auto-clear the console if any output is sent by the program
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var consoleboxStream="";
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// for opcodes, see ftp://ftp.comlab.ox.ac.uk/pub/Cards/txt/6800.txt
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testprogram = [
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0x86, 0x00, 0x9d, 0x10, 0x7e, 0x00, 0x02, 0x08, 0x5a, 0x7c, 0x00,
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0x0f, 0x0d, 0x89, 0x02, 0x39,
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]
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// Crasm LYB 1.3: page 1
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// 1 CPU 6800
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// 2
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// 0000 3 * = 0
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// 4
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// 5 CODE
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// 6
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// 0000 8600 7 LDAA #$00
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// 0002 9D10 8 JSR $0010
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// 0004 7E0002 9 JMP $0002
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// 0007 08 10 INX
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// 0008 5A 11 DECB
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// 0009 7C000F 12 INC $0F
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// 000C 0D 13 SEC
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// 000D 8902 14 ADCA #$02
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// 000F 39 15 RTS
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// 16
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// ERRORS: 0
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// WARNINGS: 0
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// Successful assembly...
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// Last address f (15)
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// Code length 20 (32)
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File diff suppressed because it is too large
Load Diff
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<!DOCTYPE html>
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<head>
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<title>Visual 6800 in JavaScript</title>
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<style type="text/css">@import "expert.css";</style>
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<script src="chip-6800/segdefs.js"></script>
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<script src="chip-6800/transdefs.js"></script>
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<script src="chip-6800/nodenames.js"></script>
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<script src="wires.js"></script>
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<script src="expertWires.js"></script>
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<script src="chipsim.js"></script>
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<script src="memtable.js"></script>
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<script src="macros.js"></script>
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<script src="chip-6800/support.js"></script>
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<script src="chip-6800/testprogram.js"></script>
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<script src="3rdparty/jquery-1.3.2.min.js"></script>
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<script src="3rdparty/jquery.cookie.js"></script>
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<script src="3rdparty/splitter.js"></script>
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<script type="text/javascript">
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function handleOnload() {
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/MSIE (\d+\.\d+);/.test(navigator.appVersion);
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IEVersion=Number(RegExp.$1);
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if((navigator.appName == 'Microsoft Internet Explorer') && (IEVersion<9)){
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document.getElementById('browsertrouble').innerHTML=
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'<p>Sorry, '+navigator.appName+' not supported - showing you a picture instead!</p>';
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document.getElementById('frame').innerHTML='<a href="browsertrouble.html"><img src="images/jssim2.png" style="border:10px"></a>';
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}else{
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setTimeout(setup,200);
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}
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};
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// initialise splitter (built on jquery)
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$().ready(function(){
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$("#frame").splitter({
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type: "v",
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outline: true,
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minLeft: 20,
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sizeLeft: 810,
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resizeToWidth: true,
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anchorToWindow: true,
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});
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$("#rightcolumn").splitter({
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type: "h",
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outline: true,
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sizeBottom: 180,
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minTop: 100,
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});
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});
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</script>
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</head>
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<body onload="handleOnload();">
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<span id="plain">
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<a href="http://www.visual6502.org/faq.html">FAQ</a>
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<a href="http://blog.visual6502.org">Blog</a>
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<a href="http://www.visual6502.org/links.html">Links</a>
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<a href="http://github.com/trebonian/visual6502">Source</a>
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<a href="ftp://ftp.comlab.ox.ac.uk/pub/Cards/txt/6800.txt">6800 instruction card</a>
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<a href="http://www.sbprojects.com/sbasm/6800.htm#model">programming model</a>
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</span>
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<div class="frame" id="frame">
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<div class="leftcolumn" id="leftcolumn">
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<div id="chipsurround" tabindex="1">
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<div class="chip" id="chip">
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<span id="waiting">Please wait, graphics initialising...</span>
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<canvas class="chip" id="chipbg"></canvas>
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<canvas class="chip" id="overlay"></canvas>
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<canvas class="chip" id="hilite"></canvas>
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<canvas class="chip" id="hitbuffer"></canvas>
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</div>
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</div> <!-- chipsurround -->
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<div class="nochip" id="nochip">
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<form>
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<input type="button" value="Show chip layout" onclick="updateChipLayoutVisibility(true)" />
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</form>
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</div>
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<div id="layoutControlPanel">
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Use 'z' or '>' to zoom in, 'x' or '<' to zoom out, click to probe signals and drag to pan.
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<form id="updateShow"> Show:
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<input type="checkbox" name="1" id="updateShow1" onchange="updateShow(this.name,this.checked)" />(diffusion)
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<input type="checkbox" name="3" id="updateShow3" onchange="updateShow(this.name,this.checked)" />(grounded diffusion)
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<input type="checkbox" name="4" id="updateShow4" onchange="updateShow(this.name,this.checked)" />(powered diffusion)
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<input type="checkbox" name="5" id="updateShow5" onchange="updateShow(this.name,this.checked)" />(polysilicon)
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<input type="checkbox" name="0" id="updateShow0" onchange="updateShow(this.name,this.checked)" />(metal)
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<input type="checkbox" name="2" id="updateShow2" onchange="updateShow(this.name,this.checked)" />(protection)
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</form>
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<form action="javascript:hiliteNodeList();">
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<input type="button" value="Find:" onclick="hiliteNodeList();" />
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<input type="text" id="HighlightThese" name="HighlightThese" value="" />
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<input type="button" value="Clear Highlighting" onclick="clearHighlight();" />
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<span class="animatebox">
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Animate during simulation:
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<input type="checkbox" id="animateModeCheckbox" onchange="updateChipLayoutAnimation(this.checked)"
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/></span>
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</form>
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<form>
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<input type="button" value="Hide Chip Layout" onclick="updateChipLayoutVisibility(false)" />
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<a href="" id="linkHere" >Link to this location</a>
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</form>
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</div>
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</div> <!-- closing leftcolumn -->
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<div class="rightcolumn" id="rightcolumn">
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<div id="righttopdiv">
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<div class = "buttons">
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<div class="twobuttons">
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<a href ="javascript:stopChip()" id="stop"><img class="navstop" src="images/stop.png" title="stop"></a>
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<a href ="javascript:runChip()" id="start"><img class="navplay" src="images/play.png" title="run"></a>
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</div>
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<div class="morebuttons">
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<a href ="javascript:resetChip()"><img class="navbutton" src="images/up.png" title="reset"></a>
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<a href ="javascript:stepBack()"><img class="navbutton" src="images/prev.png" title="back"></a>
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<a href ="javascript:stepForward()"><img class="navbutton" src="images/next.png" title="forward"></a>
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<a href ="javascript:goUntilSyncOrWrite()"><img class="navbutton" src="images/singlestep.png" title="step"></a>
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<a href ="javascript:goFor()"><img class="navbutton" src="images/fastforward.png" title="fastforward"></a>
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</div>
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<div style="float:right;">
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<a href="http://visual6502.org/wiki/index.php?title=JssimUserHelp" target="_blank">User Guide</a>
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</div>
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</div> <!-- buttons -->
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<div class="status" id="status"><p>x: 0<br>y: 0</p>
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</div> <!-- status -->
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<div id="memtablediv">
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<table class="memtable" id="memtable" tabindex="2"></table>
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</div>
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</div> <!-- righttopdiv -->
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<div id="tracingdiv">
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<textarea id="consolebox">
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click here and type if your program handles input
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</textarea>
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<div id="expertControlPanel" tabindex="3">
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<form action="javascript:updateLogList()">
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<input type="button" value="Trace more" onclick="updateLoglevel(++loglevel)" />
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<input type="button" value="Trace less" onclick="updateLoglevel(--loglevel)" />
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<input type="button" value="Trace these too:" onclick="updateLogList()" />
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<input type="text" id="LogThese" name="LogThese" value="" />
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<input type="button" value="Log Up/Down" onclick="updateLogDirection();" />
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<input type="button" value="Clear Log" onclick="updateLoglevel(loglevel)" />
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</form>
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<br />
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</div>
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<div id="logstreamscroller">
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<table class="logstream" id="logstream"></table>
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</div>
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</div>
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</div> <!-- closing rightcolumn -->
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</div> <!-- closing 'frame' div -->
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</body>
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</html>
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