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

Added some PDP-11 opcodes I missed (JMP and SWAB)

Browse source
This commit is contained in:
Jeff 2016-09-30 15:27:53 -07:00 • committed by Jeff Parsons
commit 0e0dcb29ec
3 changed files with 268 additions and 203 deletions
Download patch file Download diff file Expand all files Collapse all files

34
modules/pdp11/lib/cpustate.js
View file

@ -511,7 +511,7 @@ CPUStatePDP11.prototype.setNF = function()
*/
CPUStatePDP11.prototype.getPC = function()
{
return this.regsGen[7];
return this.regsGen[PDP11.REG.PC];
};
/**
@ -522,7 +522,7 @@ CPUStatePDP11.prototype.getPC = function()
*/
CPUStatePDP11.prototype.getPCWord = function()
{
var data = this.readWordFromVirtual(this.regsGen[7]);
var data = this.readWordFromVirtual(this.regsGen[PDP11.REG.PC]);
this.advancePC(2);
return data;
};
@ -535,7 +535,7 @@ CPUStatePDP11.prototype.getPCWord = function()
*/
CPUStatePDP11.prototype.advancePC = function(off)
{
this.regsGen[7] = (this.regsGen[7] + off) & 0xffff;
this.regsGen[PDP11.REG.PC] = (this.regsGen[PDP11.REG.PC] + off) & 0xffff;
};
/**
@ -546,7 +546,7 @@ CPUStatePDP11.prototype.advancePC = function(off)
*/
CPUStatePDP11.prototype.setPC = function(addr)
{
this.regsGen[7] = addr & 0xffff;
this.regsGen[PDP11.REG.PC] = addr & 0xffff;
};
/**
@ -557,7 +557,7 @@ CPUStatePDP11.prototype.setPC = function(addr)
*/
CPUStatePDP11.prototype.getSP = function()
{
return this.regsGen[6];
return this.regsGen[PDP11.REG.SP];
};
/**
@ -568,7 +568,7 @@ CPUStatePDP11.prototype.getSP = function()
*/
CPUStatePDP11.prototype.setSP = function(addr)
{
this.regsGen[6] = addr & 0xffff;
this.regsGen[PDP11.REG.SP] = addr & 0xffff;
};
/**
@ -746,14 +746,14 @@ CPUStatePDP11.prototype.setPSW = function(newPSW)
};
/**
* updateNZFlags(result)
* updateNZVFlags(result)
*
* NOTE: The V flag is simply zeroed, and the C flag is unchanged.
* NOTE: Only N and Z are updated based on the result; V is zeroed, C is unchanged.
*
* @this {CPUStatePDP11}
* @param {number} result
*/
CPUStatePDP11.prototype.updateNZFlags = function(result)
CPUStatePDP11.prototype.updateNZVFlags = function(result)
{
if (!(this.opFlags & PDP11.OPFLAG.NO_FLAGS)) {
this.flagN = this.flagZ = result;
@ -761,6 +761,22 @@ CPUStatePDP11.prototype.updateNZFlags = function(result)
}
};
/**
* updateNZVCFlags(result)
*
* NOTE: Only N and Z are updated based on the result; both V and C are simply zeroed.
*
* @this {CPUStatePDP11}
* @param {number} result
*/
CPUStatePDP11.prototype.updateNZVCFlags = function(result)
{
if (!(this.opFlags & PDP11.OPFLAG.NO_FLAGS)) {
this.flagN = this.flagZ = result;
this.flagV = this.flagC = 0;
}
};
/**
* updateAllFlags(result, overflow)
*