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Simplified flag management

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This commit is contained in:
Jeff Parsons 2016-04-21 15:41:58 -07:00
commit 425f565b11
7 changed files with 443 additions and 382 deletions
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101
modules/pc8080/lib/cpuops.js
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@ -55,11 +55,102 @@ CPUDef.opNOP = function()
*/
CPUDef.opLXIB = function()
{
this.regC = this.getPCByte();
this.regB = this.getPCByte();
this.setBC(this.getPCWord());
this.nStepCycles -= 10;
};
/**
* op=0x02 (STAX B)
*
* @this {CPUSim}
*/
CPUDef.opSTAXB = function()
{
this.setByte(this.getBC(), this.regA);
this.nStepCycles -= 7;
};
/**
* op=0x03 (INX B)
*
* @this {CPUSim}
*/
CPUDef.opINXB = function()
{
this.setBC(this.getBC() + 1);
this.nStepCycles -= 5;
};
/**
* op=0x04 (INR B)
*
* @this {CPUSim}
*/
CPUDef.opINRB = function()
{
this.regB = this.incByte(this.regB);
this.nStepCycles -= 5;
};
/**
* op=0x05 (DCR B)
*
* @this {CPUSim}
*/
CPUDef.opDCRB = function()
{
this.regB = this.decByte(this.regB);
this.nStepCycles -= 5;
};
/**
* op=0x06 (MVI B,d8)
*
* @this {CPUSim}
*/
CPUDef.opMVIB = function()
{
this.regB = this.getPCByte();
this.nStepCycles -= 7;
};
/**
* op=0x07 (RLC)
*
* @this {CPUSim}
*/
CPUDef.opRLC = function()
{
var b = this.regA << 1;
this.regA = (b & 0xff) | (b >> 8);
this.resultZeroCarry = (this.resultZeroCarry & 0xff) | (b & 0x100);
this.nStepCycles -= 4;
};
/**
* op=0x09 (DAD B)
*
* @this {CPUSim}
*/
CPUDef.opDADB = function()
{
var w;
this.setHL(w = this.getHL() + this.getBC());
this.resultZeroCarry = (this.resultZeroCarry & 0xff) | ((w >> 8) & 0x100);
this.nStepCycles -= 10;
};
/**
* op=0x0A (LDAX B)
*
* @this {CPUSim}
*/
CPUDef.opLDAXB = function()
{
this.regA = this.getByte(this.getBC());
this.nStepCycles -= 7;
};
/**
* opTBD()
*
@ -80,9 +171,9 @@ CPUDef.opTBD = function()
* money on array lookup.
*/
CPUDef.aOps = [
/* 0x00-0x03 */ CPUDef.opNOP, CPUDef.opLXIB, CPUDef.opTBD, CPUDef.opTBD,
/* 0x04-0x07 */ CPUDef.opTBD, CPUDef.opTBD, CPUDef.opTBD, CPUDef.opTBD,
/* 0x08-0x0B */ CPUDef.opTBD, CPUDef.opTBD, CPUDef.opTBD, CPUDef.opTBD,
/* 0x00-0x03 */ CPUDef.opNOP, CPUDef.opLXIB, CPUDef.opSTAXB, CPUDef.opINXB,
/* 0x04-0x07 */ CPUDef.opINRB, CPUDef.opDCRB, CPUDef.opMVIB, CPUDef.opRLC,
/* 0x08-0x0B */ CPUDef.opNOP, CPUDef.opDADB, CPUDef.opLDAXB, CPUDef.opTBD,
/* 0x0C-0x0F */ CPUDef.opTBD, CPUDef.opTBD, CPUDef.opTBD, CPUDef.opTBD,
/* 0x10-0x13 */ CPUDef.opTBD, CPUDef.opTBD, CPUDef.opTBD, CPUDef.opTBD,
/* 0x14-0x17 */ CPUDef.opTBD, CPUDef.opTBD, CPUDef.opTBD, CPUDef.opTBD,