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Improved IOPAGE management

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This commit is contained in:
Jeff Parsons 2016-10-08 11:09:14 -07:00 • committed by Jeff Parsons
commit ae4fbeb489
7 changed files with 469 additions and 422 deletions
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60
modules/pdp11/lib/cpu.js
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@ -197,11 +197,6 @@ CPUPDP11.prototype.initBus = function(cmp, bus, cpu, dbg)
if (control) this.cmp.setBinding(null, CPUPDP11.BUTTONS[i], control);
}
/*
* Attach the ChipSet component to the CPU so that it can be notified whenever the CPU stops and starts.
*/
this.chipset = null; // /** @type {ChipSetPDP11} */ (cmp.getMachineComponent("ChipSet"));
/*
* We've already saved the parmsCPU 'autoStart' setting, but there may be a machine (or URL) override.
*/
@ -210,12 +205,27 @@ CPUPDP11.prototype.initBus = function(cmp, bus, cpu, dbg)
this.flags.autoStart = (sAutoStart == "true"? true : (sAutoStart == "false"? false : !!sAutoStart));
}
this.initBusComplete();
this.setReady();
};
/**
* initBusComplete()
*
* Stub for Bus finalization (overridden by the CPUStatePDP11 component).
*
* @this {CPUPDP11}
*/
CPUPDP11.prototype.initBusComplete = function()
{
};
/**
* reset()
*
* Stub for reset notification (overridden by the CPUStatePDP11 component).
*
* @this {CPUPDP11}
*/
CPUPDP11.prototype.reset = function()
@ -225,7 +235,7 @@ CPUPDP11.prototype.reset = function()
/**
* save()
*
* This is a placeholder for save support (overridden by the CPUStatePDP11 component).
* Stub for save support (overridden by the CPUStatePDP11 component).
*
* @this {CPUPDP11}
* @return {Object|null}
@ -238,7 +248,7 @@ CPUPDP11.prototype.save = function()
/**
* restore(data)
*
* This is a placeholder for restore support (overridden by the CPUStatePDP11 component).
* Stub for restore support (overridden by the CPUStatePDP11 component).
*
* @this {CPUPDP11}
* @param {Object} data
@ -552,40 +562,6 @@ CPUPDP11.prototype.setBinding = function(sHTMLType, sBinding, control, sValue)
return fBound;
};
/**
* setBurstCycles(nCycles)
*
* This function is used by the ChipSet component whenever a very low timer count is set,
* in anticipation of the timer requiring an update sooner than the normal nCyclesPerYield
* period in runCPU() would normally provide.
*
* NOTE: In this context, "timer" refers to a timer chip (eg, an Intel 8253) being emulated by
* by the ChipSet component, not the timers managed by the CPU (eg, addTimer(), setTimer(), etc).
*
* @this {CPUPDP11}
* @param {number} nCycles is the target number of cycles to drop the current burst to
* @return {boolean}
*/
CPUPDP11.prototype.setBurstCycles = function(nCycles)
{
if (this.flags.running) {
var nDelta = this.nStepCycles - nCycles;
/*
* NOTE: If nDelta is negative, we will actually be increasing nStepCycles and nBurstCycles.
* Which is OK, but if we're also taking snapshots of the cycle counts, to make sure that instruction
* costs are being properly assessed, then we need to update nSnapCycles as well.
*
* TODO: If the delta is negative, we could simply ignore the request, but we must first carefully
* consider the impact on the ChipSet timers, if any.
*/
// if (DEBUG) this.nSnapCycles -= nDelta;
this.nStepCycles -= nDelta;
this.nBurstCycles -= nDelta;
return true;
}
return false;
};
/**
* addCycles(nCycles, fEndStep)
*
@ -1183,7 +1159,6 @@ CPUPDP11.prototype.startCPU = function(fUpdateFocus)
this.setSpeed();
this.flags.running = true;
this.flags.starting = true;
if (this.chipset) this.chipset.start();
var controlRun = this.bindings["run"];
if (controlRun) controlRun.textContent = "Halt";
if (this.cmp) {
@ -1227,7 +1202,6 @@ CPUPDP11.prototype.stopCPU = function(fComplete)
this.addCycles(this.nRunCycles);
this.nRunCycles = 0;
this.flags.running = false;
if (this.chipset) this.chipset.stop();
var controlRun = this.bindings["run"];
if (controlRun) controlRun.textContent = "Run";
if (this.cmp) {