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[enh]allow free-running low-overhead mode, for interactive programs

This commit is contained in:
BigEd 2010-11-15 17:29:50 +00:00
parent 71a85b3135
commit d045485ec4
1 changed files with 41 additions and 7 deletions
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48
macros.js
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@ -435,15 +435,40 @@ function chipStatus(){
selectCell(ab);
}
// run for an extended number of cycles, with low overhead, for interactive programs or for benchmarking
// note: to run an interactive program, use an URL like
// http://visual6502.org/JSSim/expert.html?graphics=f&loglevel=-1&headlesssteps=-500
function goFor(){
var n = headlessSteps;
estimatedHz1();
var n = headlessSteps; // a negative value is a request to free-run
if(headlessSteps<0)
n=-n;
var start = document.getElementById('start');
var stop = document.getElementById('stop');
start.style.visibility = 'hidden';
stop.style.visibility = 'visible';
if(typeof running == "undefined") {
initChip();
}
running = true;
setTimeout("instantaneousHz(); goForN("+n+")",0);
}
// helper function: allows us to poll 'running' without resetting it when we're re-scheduled
function goForN(n){
var n2=n; // save our parameter so we can re-submit ourselves
while(n--){
halfStep();
cycle++;
}
estimatedHz1();
instantaneousHz();
chipStatus();
if((headlessSteps<0) && running){
setTimeout("goForN("+n2+")",0); // re-submit ourselves if we are meant to free-run
return;
}
running = false;
start.style.visibility = 'visible';
stop.style.visibility = 'hidden';
}
var prevHzTimeStamp=0;
@ -452,13 +477,10 @@ var prevHzEstimate1=1;
var prevHzEstimate2=1;
var HzSamplingRate=10;
// return an averaged speed: called periodically during normal running
function estimatedHz(){
if(cycle%HzSamplingRate!=3)
return prevHzEstimate1;
return estimatedHz1();
}
function estimatedHz1(){
var HzTimeStamp = now();
var HzEstimate = (cycle-prevHzCycleCount+.01)/(HzTimeStamp-prevHzTimeStamp+.01);
HzEstimate=HzEstimate*1000/2; // convert from phases per millisecond to Hz
@ -473,6 +495,18 @@ function estimatedHz1(){
return prevHzEstimate1
}
// return instantaneous speed: called twice, before and after a timed run using goFor()
function instantaneousHz(){
var HzTimeStamp = now();
var HzEstimate = (cycle-prevHzCycleCount+.01)/(HzTimeStamp-prevHzTimeStamp+.01);
HzEstimate=HzEstimate*1000/2; // convert from phases per millisecond to Hz
prevHzEstimate1=HzEstimate;
prevHzEstimate2=prevHzEstimate1;
prevHzTimeStamp=HzTimeStamp;
prevHzCycleCount=cycle;
return prevHzEstimate1
}
var logbox;
function initLogbox(names){
logbox=document.getElementById('logstream');