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improve 6800 machine state display

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This commit is contained in:
BigEd 2011-04-02 08:01:09 +00:00
parent 6ceae74e4a
commit b5c1759f32
1 changed files with 41 additions and 3 deletions
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44
chip-6800/support.js
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@ -11,10 +11,9 @@ npwr = nodenames['vcc'];
nodenamereset = 'reset';
// we can't handle sp and ix as 16-bit quantities without refactoring busToString
presetLogLists=[
['cycle','phi1','phi2'],
['ab','db','rw','vma','Fetch','pc','acca','accb','ixh','ixl','sph','spl','p'],
['ab','db','rw','vma','Fetch','pc','acca','accb','ix','sp','p'],
['ir','sync','Execute'], // instruction fetch and execution control
['dbi','dbo','tmp'], // internal state
['idb','abh','abl','ablx'], // internal busses
@ -126,6 +125,44 @@ function readPstring(){
return result;
}
function busToString(busname){
// takes a signal name or prefix
// returns an appropriate string representation
// some 'signal names' are CPU-specific aliases to user-friendly string output
if(busname=='cycle')
return cycle>>1;
if(busname=='pc')
return busToHex('pch') + busToHex('pcl');
if(busname=='sp')
return busToHex('sph') + busToHex('spl');
if(busname=='ix')
return busToHex('ixh') + busToHex('ixl');
if(busname=='p')
return readPstring();
if(busname=='State')
return listActiveTCStates();
if(busname=='Execute')
return disassemblytoHTML(readBits('ir',8));
if(busname=='Fetch')
return isNodeHigh(nodenames['sync'])?disassemblytoHTML(readDataBus()):"";
if(busname=='plaOutputs')
// PLA outputs are mostly ^op- but some have a prefix too
// - we'll allow the x and xx prefix but ignore the #
return listActiveSignals('^([x]?x-)?op-');
if(busname=='DPControl')
return listActiveSignals('^dpc[0-9]+_');
if(busname[0]=="-"){
// invert the value of the bus for display
var value=busToHex(busname.slice(1))
if(typeof value != "undefined")
return value.replace(/./g,function(x){return (15-parseInt(x,16)).toString(16)});
else
return undefined;;
} else {
return busToHex(busname);
}
}
function chipStatus(){
var ab = readAddressBus();
var machine1 =
@ -133,7 +170,8 @@ function chipStatus(){
' phi0:' + readBit('phi2') +
' AB:' + hexWord(ab) +
' D:' + hexByte(readDataBus()) +
' RnW:' + readBit('rw');
' RnW:' + readBit('rw') +
' VMA:' + readBit('vma');
var machine2 =
' PC:' + hexWord(readPC()) +
' A:' + hexByte(readAccA()) +