Retro/pcjs
Watch
1
0
Fork
You've already forked pcjs
 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Cleaned up endBurst() and changed yieldCPU() to stop ending bursts prematurely (it only sets the new yield flag now)

Browse source
This commit is contained in:
Jeff Parsons 2017-08-14 10:36:10 -07:00 • committed by Jeff Parsons
commit 3d36682396
8 changed files with 524 additions and 538 deletions
Download patch file Download diff file Expand all files Collapse all files

222
docs/pcx86/examples/pcx86-dbg.js
View file

File diff suppressed because one or more lines are too long

266
docs/pcx86/examples/pcx86.js
View file

File diff suppressed because one or more lines are too long

39
modules/pcx86/lib/cpu.js
View file

@ -963,10 +963,10 @@ class CPU extends Component {
if (fReset || timer[1] < 0) {
nCycles = this.getMSCycles(ms);
/*
* We must now confront the following problem: if the CPU is currently executing a burst of cycles,
* the number of cycles it has executed in that burst so far must NOT be charged against the cycle
* timeout we're about to set. The simplest way to resolve that is to immediately call endBurst()
* and bias the cycle timeout by the number of cycles that the burst executed.
* If the CPU is currently executing a burst of cycles, the number of cycles it has executed in
* that burst so far must NOT be charged against the cycle timeout we're about to set. The simplest
* way to resolve that is to immediately call endBurst() and bias the cycle timeout by the number
* of cycles that the burst executed.
*/
if (this.flags.running) {
nCycles += this.endBurst();
@ -992,10 +992,10 @@ class CPU extends Component {
if (iTimer >= 0 && iTimer < this.aTimers.length) {
var timer = this.aTimers[iTimer];
/*
* We must now confront the following problem: if the CPU is currently executing a burst of cycles,
* the number of cycles it has executed in that burst so far must NOT be charged against the cycle
* timeout we're about to set. The simplest way to resolve that is to immediately call endBurst()
* and bias the cycle timeout by the number of cycles that the burst executed.
* If the CPU is currently executing a burst of cycles, the number of cycles it has executed in
* that burst so far must NOT be charged against the cycle timeout we're about to set. The simplest
* way to resolve that is to immediately call endBurst() and bias the cycle timeout by the number
* of cycles that the burst executed.
*/
if (this.flags.running) {
nCycles += this.endBurst();
@ -1123,17 +1123,17 @@ class CPU extends Component {
}
/**
* endBurst(fReset)
* endBurst()
*
* @this {CPU}
* @param {boolean} [fReset]
* @return {number} (number of cycles executed in the most recent burst)
*/
endBurst(fReset)
endBurst()
{
var nCycles = this.nBurstCycles -= this.nStepCycles;
this.nStepCycles = 0;
if (fReset) this.nBurstCycles = 0;
var nCycles = this.nBurstCycles - this.nStepCycles;
this.nBurstCycles = this.nStepCycles = 0;
this.counts.nCyclesThisRun += nCycles;
this.nRunCycles += nCycles;
return nCycles;
}
@ -1189,19 +1189,13 @@ class CPU extends Component {
/*
* Terminate the burst, returning the number of cycles that stepCPU() actually ran.
*/
nCycles = this.endBurst(true);
/*
* Add nCycles to nCyclesThisRun, as well as nRunCycles (the cycle count since the CPU started).
*/
this.counts.nCyclesThisRun += nCycles;
this.nRunCycles += nCycles;
this.updateChecksum(nCycles);
nCycles = this.endBurst();
/*
* Update all timers, firing those whose cycle countdowns have reached (or dropped below) zero.
*/
this.updateTimers(nCycles);
this.updateChecksum(nCycles);
} while (this.flags.running && !this.flags.yield);
}
@ -1327,7 +1321,6 @@ class CPU extends Component {
*/
yieldCPU()
{
this.endBurst();
this.flags.yield = true;
/*
* The Debugger calls yieldCPU() after every message() to ensure browser responsiveness, but it looks

222
versions/pcx86/1.36.1/pcx86-dbg.js
View file

File diff suppressed because one or more lines are too long

4
versions/pcx86/1.36.1/pcx86-dbg.map
View file

File diff suppressed because one or more lines are too long

39
versions/pcx86/1.36.1/pcx86-uncompiled.js
View file

@ -12710,10 +12710,10 @@ class CPU extends Component {
if (fReset || timer[1] < 0) {
nCycles = this.getMSCycles(ms);
/*
* We must now confront the following problem: if the CPU is currently executing a burst of cycles,
* the number of cycles it has executed in that burst so far must NOT be charged against the cycle
* timeout we're about to set. The simplest way to resolve that is to immediately call endBurst()
* and bias the cycle timeout by the number of cycles that the burst executed.
* If the CPU is currently executing a burst of cycles, the number of cycles it has executed in
* that burst so far must NOT be charged against the cycle timeout we're about to set. The simplest
* way to resolve that is to immediately call endBurst() and bias the cycle timeout by the number
* of cycles that the burst executed.
*/
if (this.flags.running) {
nCycles += this.endBurst();
@ -12739,10 +12739,10 @@ class CPU extends Component {
if (iTimer >= 0 && iTimer < this.aTimers.length) {
var timer = this.aTimers[iTimer];
/*
* We must now confront the following problem: if the CPU is currently executing a burst of cycles,
* the number of cycles it has executed in that burst so far must NOT be charged against the cycle
* timeout we're about to set. The simplest way to resolve that is to immediately call endBurst()
* and bias the cycle timeout by the number of cycles that the burst executed.
* If the CPU is currently executing a burst of cycles, the number of cycles it has executed in
* that burst so far must NOT be charged against the cycle timeout we're about to set. The simplest
* way to resolve that is to immediately call endBurst() and bias the cycle timeout by the number
* of cycles that the burst executed.
*/
if (this.flags.running) {
nCycles += this.endBurst();
@ -12870,17 +12870,17 @@ class CPU extends Component {
}
/**
* endBurst(fReset)
* endBurst()
*
* @this {CPU}
* @param {boolean} [fReset]
* @return {number} (number of cycles executed in the most recent burst)
*/
endBurst(fReset)
endBurst()
{
var nCycles = this.nBurstCycles -= this.nStepCycles;
this.nStepCycles = 0;
if (fReset) this.nBurstCycles = 0;
var nCycles = this.nBurstCycles - this.nStepCycles;
this.nBurstCycles = this.nStepCycles = 0;
this.counts.nCyclesThisRun += nCycles;
this.nRunCycles += nCycles;
return nCycles;
}
@ -12936,19 +12936,13 @@ class CPU extends Component {
/*
* Terminate the burst, returning the number of cycles that stepCPU() actually ran.
*/
nCycles = this.endBurst(true);
/*
* Add nCycles to nCyclesThisRun, as well as nRunCycles (the cycle count since the CPU started).
*/
this.counts.nCyclesThisRun += nCycles;
this.nRunCycles += nCycles;
this.updateChecksum(nCycles);
nCycles = this.endBurst();
/*
* Update all timers, firing those whose cycle countdowns have reached (or dropped below) zero.
*/
this.updateTimers(nCycles);
this.updateChecksum(nCycles);
} while (this.flags.running && !this.flags.yield);
}
@ -13074,7 +13068,6 @@ class CPU extends Component {
*/
yieldCPU()
{
this.endBurst();
this.flags.yield = true;
/*
* The Debugger calls yieldCPU() after every message() to ensure browser responsiveness, but it looks

266
versions/pcx86/1.36.1/pcx86.js
View file

File diff suppressed because one or more lines are too long

4
versions/pcx86/1.36.1/pcx86.map
View file

File diff suppressed because one or more lines are too long