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Added SerialPort interface to support the passing of flow control signals between machines (only PDP-11 and VT100 for now; PCx86 will come later, after I study how well, or not-so-well, this works with the VT100)

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Jeff Parsons 2016-12-01 11:15:27 -08:00 • committed by Jeff Parsons
commit 6bea7fd0e9
11 changed files with 901 additions and 732 deletions
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41
modules/pdp11/lib/cpustate.js
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@ -149,16 +149,35 @@ CPUStatePDP11.prototype.initProcessor = function()
this.nDisableTraps = 0;
/** @type {IRQ|null} */
this.irqNext = null; // the head of the active IRQ list, in priority order
this.irqNext = null; // the head of the active IRQ list, in priority order
if (DEBUG) {
/** @type {Array.<IRQ>} */
this.aIRQs = []; // list of all IRQs, active or not (just for debugging)
}
/** @type {Array.<IRQ>} */
this.aIRQs = []; // list of all IRQs, active or not (to be used for auto-configuration)
this.flags.complete = false;
};
/**
* finish()
*
* TODO: This function simply ensures that we don't leave any IRQs installed with unresolved floating
* (negative) vectors; properly assigning vectors according to device type (ie, auto-configuration) is an
* exercise left for another day.
*
* @this {CPUStatePDP11}
*/
CPUStatePDP11.prototype.finish = function()
{
var vectorFloating = 0o300;
for (var i = 0; i < this.aIRQs.length; i++) {
var irq = this.aIRQs[i];
if (irq.vector < 0) {
irq.vector = vectorFloating;
vectorFloating += 4;
}
}
};
/**
* reset()
*
@ -170,7 +189,7 @@ CPUStatePDP11.prototype.reset = function()
if (this.flags.running) this.stopCPU();
this.initRegs();
this.resetCycles();
this.clearError(); // clear any fatal error/exception that setError() may have flagged
this.clearError(); // clear any fatal error/exception that setError() may have flagged
this.parent.reset.call(this);
};
@ -264,7 +283,7 @@ CPUStatePDP11.prototype.resetMMU = function()
this.regMMR1 = 0; // 177574
this.regMMR2 = 0; // 177576
this.regMMR3 = 0; // 172516
this.regErr = 0; // 177766 TODO: Do we ever need to clear this, because it appears to accumulate errors...
this.regErr = 0; // 177766 TODO: Do we ever need to automatically clear this, or is it manually cleared?
this.regPIR = 0; // 177772
this.regSL = 0xff; // 177774
this.mmuEnable = 0; // MMU enabled for PDP11.ACCESS.READ or PDP11.ACCESS.WRITE
@ -774,7 +793,7 @@ CPUStatePDP11.prototype.setSP = function(addr)
* addIRQ(vector, priority, message)
*
* @this {CPUStatePDP11}
* @param {number} vector
* @param {number} vector (-1 for floating vector)
* @param {number} priority
* @param {number} [message]
* @return {IRQ}
@ -782,10 +801,8 @@ CPUStatePDP11.prototype.setSP = function(addr)
CPUStatePDP11.prototype.addIRQ = function(vector, priority, message)
{
var irq = {vector: vector, priority: priority, message: message || 0, next: null};
if (DEBUG) {
irq.name = PDP11.VECTORS[vector];
this.aIRQs.push(irq);
}
irq.name = PDP11.VECTORS[vector];
this.aIRQs.push(irq);
return irq;
};