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8080.js
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8080.js
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var cpu;
(function (cpu) {
var Intel8080 = (function () {
function Intel8080() {
this.PC = 0;
this.SP = 0;
this.A = 0;
this.B = 0;
this.C = 0;
this.D = 0;
this.E = 0;
this.H = 0;
this.L = 0;
this.BC = 0;
this.DE = 0;
this.HL = 0;
this.SIGN = 0;
this.ZERO = 0;
this.HALFCARRY = 0;
this.PARITY = 0;
this.CARRY = 0;
this.INTERRUPT = 0;
this.current_inst = 0;
this.interrupt_alternate = 0;
this.count_instructions = 0;
this.disassembly_pc = 0;
this.mappingTable = new Array(0x100);
this.instruction_per_frame = 4000;
this.half_instruction_per_frame = 4000 >> 1;
}
Intel8080.prototype.Instruction_NOP = function () {
};
Intel8080.prototype.Instruction_JMP = function () {
var condition = true;
var data16 = this.FetchRomShort();
switch(this.current_inst) {
case 0xC3:
break;
case 0xC2:
condition = !this.ZERO;
break;
case 0XCA:
condition = Boolean(this.ZERO);
break;
case 0xD2:
condition = !this.CARRY;
break;
case 0xDA:
condition = Boolean(this.CARRY);
break;
case 0xF2:
condition = !this.SIGN;
break;
case 0xFA:
condition = Boolean(this.SIGN);
break;
}
if(condition) {
this.PC = data16;
}
};
Intel8080.prototype.Instruction_LXI_BC = function () {
var data16 = this.FetchRomShort();
this.SetBC(data16);
};
Intel8080.prototype.Instruction_LXI_DE = function () {
var data16 = this.FetchRomShort();
this.SetDE(data16);
};
Intel8080.prototype.Instruction_LXI_HL = function () {
var data16 = this.FetchRomShort();
this.SetHL(data16);
};
Intel8080.prototype.Instruction_LXI_SP = function () {
var data16 = this.FetchRomShort();
this.SetSP(data16);
};
Intel8080.prototype.Instruction_MVI_A = function () {
var data8 = this.FetchRomByte();
this.SetA(data8);
};
Intel8080.prototype.Instruction_MVI_B = function () {
var data8 = this.FetchRomByte();
this.SetB(data8);
};
Intel8080.prototype.Instruction_MVI_C = function () {
var data8 = this.FetchRomByte();
this.SetC(data8);
};
Intel8080.prototype.Instruction_MVI_D = function () {
var data8 = this.FetchRomByte();
this.SetD(data8);
};
Intel8080.prototype.Instruction_MVI_E = function () {
var data8 = this.FetchRomByte();
this.SetE(data8);
};
Intel8080.prototype.Instruction_MVI_H = function () {
var data8 = this.FetchRomByte();
this.SetH(data8);
};
Intel8080.prototype.Instruction_MVI_L = function () {
var data8 = this.FetchRomByte();
this.SetL(data8);
};
Intel8080.prototype.Instruction_MVI_HL = function () {
var data8 = this.FetchRomByte();
this.WriteByte(this.HL, data8);
};
Intel8080.prototype.Instruction_CALL = function () {
var condition = true;
var data16 = this.FetchRomShort();
switch(this.current_inst) {
case 0xCD:
break;
case 0xC4:
condition = !this.ZERO;
break;
case 0xCC:
condition = Boolean(this.ZERO);
break;
case 0xD4:
condition = !this.CARRY;
break;
case 0xDC:
condition = Boolean(this.CARRY);
break;
}
if(condition) {
this.StackPush(this.PC);
this.PC = data16;
}
};
Intel8080.prototype.Instruction_RET = function () {
var condition = true;
switch(this.current_inst) {
case 0xC9:
break;
case 0xC0:
condition = !this.ZERO;
break;
case 0xC8:
condition = Boolean(this.ZERO);
break;
case 0xD0:
condition = !this.CARRY;
break;
case 0xD8:
condition = Boolean(this.CARRY);
break;
}
if(condition) {
this.PC = this.StackPop();
}
};
Intel8080.prototype.Instruction_LDA = function () {
var source;
switch(this.current_inst) {
case 0x0A:
source = this.BC;
break;
case 0x1A:
source = this.DE;
break;
case 0x3A:
source = this.FetchRomShort();
break;
}
this.SetA(this.ReadByte(source));
};
Intel8080.prototype.Instruction_PUSH = function () {
var value;
switch(this.current_inst) {
case 0xC5:
value = this.BC;
break;
case 0xD5:
value = this.DE;
break;
case 0xE5:
value = this.HL;
break;
case 0xF5:
value = (this.A << 8);
if(this.SIGN) {
value |= 0x80;
}
if(this.ZERO) {
value |= 0x40;
}
if(this.INTERRUPT) {
value |= 0x20;
}
if(this.HALFCARRY) {
value |= 0x10;
}
if(this.CARRY) {
value |= 0x1;
}
break;
}
this.StackPush(value);
};
Intel8080.prototype.Instruction_POP_BC = function () {
var value = this.StackPop();
this.SetBC(value);
};
Intel8080.prototype.Instruction_POP_DE = function () {
var value = this.StackPop();
this.SetDE(value);
};
Intel8080.prototype.Instruction_POP_HL = function () {
var value = this.StackPop();
this.SetHL(value);
};
Intel8080.prototype.Instruction_POP_FLAGS = function () {
var value = this.StackPop();
this.A = (value >> 8);
this.SIGN = (value & 0x80);
this.ZERO = (value & 0x40);
this.INTERRUPT = (value & 0x20);
this.HALFCARRY = (value & 0x10);
this.CARRY = (value & 0x1);
};
Intel8080.prototype.Instruction_MOVHL = function () {
switch(this.current_inst) {
case 0x77:
this.WriteByte(this.HL, this.A);
break;
case 0x70:
this.WriteByte(this.HL, this.B);
break;
case 0x71:
this.WriteByte(this.HL, this.C);
break;
case 0x72:
this.WriteByte(this.HL, this.D);
break;
case 0x73:
this.WriteByte(this.HL, this.E);
break;
case 0x74:
this.WriteByte(this.HL, this.H);
break;
case 0x75:
this.WriteByte(this.HL, this.L);
break;
}
};
Intel8080.prototype.Instruction_MOV = function () {
switch(this.current_inst) {
case 0x7F:
this.SetA(this.A);
break;
case 0x78:
this.SetA(this.B);
break;
case 0x79:
this.SetA(this.C);
break;
case 0x7A:
this.SetA(this.D);
break;
case 0x7B:
this.SetA(this.E);
break;
case 0x7C:
this.SetA(this.H);
break;
case 0x7D:
this.SetA(this.L);
break;
case 0x7E:
this.SetA(this.ReadByte(this.HL));
break;
case 0x47:
this.SetB(this.A);
break;
case 0x40:
this.SetB(this.B);
break;
case 0x41:
this.SetB(this.C);
break;
case 0x42:
this.SetB(this.D);
break;
case 0x43:
this.SetB(this.E);
break;
case 0x44:
this.SetB(this.H);
break;
case 0x45:
this.SetB(this.L);
break;
case 0x46:
this.SetB(this.ReadByte(this.HL));
break;
case 0x4F:
this.SetC(this.A);
break;
case 0x48:
this.SetC(this.B);
break;
case 0x49:
this.SetC(this.C);
break;
case 0x4A:
this.SetC(this.D);
break;
case 0x4B:
this.SetC(this.E);
break;
case 0x4C:
this.SetC(this.H);
break;
case 0x4D:
this.SetC(this.L);
break;
case 0x4E:
this.SetC(this.ReadByte(this.HL));
break;
case 0x57:
this.SetD(this.A);
break;
case 0x50:
this.SetD(this.B);
break;
case 0x51:
this.SetD(this.C);
break;
case 0x52:
this.SetD(this.D);
break;
case 0x53:
this.SetD(this.E);
break;
case 0x54:
this.SetD(this.H);
break;
case 0x55:
this.SetD(this.L);
break;
case 0x56:
this.SetD(this.ReadByte(this.HL));
break;
case 0x5F:
this.SetE(this.A);
break;
case 0x58:
this.SetE(this.B);
break;
case 0x59:
this.SetE(this.C);
break;
case 0x5A:
this.SetE(this.D);
break;
case 0x5B:
this.SetE(this.E);
break;
case 0x5C:
this.SetE(this.H);
break;
case 0x5D:
this.SetE(this.L);
break;
case 0x5E:
this.SetE(this.ReadByte(this.HL));
break;
case 0x67:
this.SetH(this.A);
break;
case 0x60:
this.SetH(this.B);
break;
case 0x61:
this.SetH(this.C);
break;
case 0x62:
this.SetH(this.D);
break;
case 0x63:
this.SetH(this.E);
break;
case 0x64:
this.SetH(this.H);
break;
case 0x65:
this.SetH(this.L);
break;
case 0x66:
this.SetH(this.ReadByte(this.HL));
break;
case 0x6F:
this.SetL(this.A);
break;
case 0x68:
this.SetL(this.B);
break;
case 0x69:
this.SetL(this.C);
break;
case 0x6A:
this.SetL(this.D);
break;
case 0x6B:
this.SetL(this.E);
break;
case 0x6C:
this.SetL(this.H);
break;
case 0x6D:
this.SetL(this.L);
break;
case 0x6E:
this.SetL(this.ReadByte(this.HL));
break;
}
};
Intel8080.prototype.Instruction_INX = function () {
switch(this.current_inst) {
case 0x03:
this.SetBC(this.BC + 1);
break;
case 0x13:
this.SetDE(this.DE + 1);
break;
case 0x23:
this.SetHL(this.HL + 1);
break;
case 0x33:
this.SetSP(this.SP + 1);
break;
}
};
Intel8080.prototype.Instruction_DAD_BC = function () {
this.AddHL(this.BC);
};
Intel8080.prototype.Instruction_DAD_DE = function () {
this.AddHL(this.DE);
};
Intel8080.prototype.Instruction_DAD_HL = function () {
this.AddHL(this.HL);
};
Intel8080.prototype.Instruction_DAD_SP = function () {
this.AddHL(this.SP);
};
Intel8080.prototype.AddHL = function (inValue) {
var value = (this.HL + inValue);
this.SetHL(value);
this.CARRY = Number(value > 0xFFFF);
};
Intel8080.prototype.Instruction_DCX = function () {
switch(this.current_inst) {
case 0x0B:
this.SetBC(this.BC - 1);
break;
case 0x1B:
this.SetDE(this.DE - 1);
break;
case 0x2B:
this.SetHL(this.HL - 1);
break;
case 0x3B:
this.SetSP(this.SP - 1);
break;
}
};
Intel8080.prototype.Instruction_DEC = function () {
switch(this.current_inst) {
case 0x3D:
this.SetA(this.PerformDec(this.A));
break;
case 0x05:
this.SetB(this.PerformDec(this.B));
break;
case 0x0D:
this.SetC(this.PerformDec(this.C));
break;
case 0x15:
this.SetD(this.PerformDec(this.D));
break;
case 0x1D:
this.SetE(this.PerformDec(this.E));
break;
case 0x25:
this.SetH(this.PerformDec(this.H));
break;
case 0x2D:
this.SetL(this.PerformDec(this.L));
break;
case 0x35:
var data8 = this.ReadByte(this.HL);
this.WriteByte(this.HL, this.PerformDec(data8));
break;
}
};
Intel8080.prototype.Instruction_INC = function () {
switch(this.current_inst) {
case 0x3C:
this.SetA(this.PerformInc(this.A));
break;
case 0x04:
this.SetB(this.PerformInc(this.B));
break;
case 0x0C:
this.SetC(this.PerformInc(this.C));
break;
case 0x14:
this.SetD(this.PerformInc(this.D));
break;
case 0x1C:
this.SetE(this.PerformInc(this.E));
break;
case 0x24:
this.SetH(this.PerformInc(this.H));
break;
case 0x2C:
this.SetL(this.PerformInc(this.L));
break;
case 0x34:
var data8 = this.ReadByte(this.HL);
this.WriteByte(this.HL, this.PerformInc(data8));
break;
}
};
Intel8080.prototype.Instruction_AND = function () {
switch(this.current_inst) {
case 0xA7:
this.PerformAnd(this.A);
break;
case 0xA0:
this.PerformAnd(this.B);
break;
case 0xA1:
this.PerformAnd(this.C);
break;
case 0xA2:
this.PerformAnd(this.D);
break;
case 0xA3:
this.PerformAnd(this.E);
break;
case 0xA4:
this.PerformAnd(this.H);
break;
case 0xA5:
this.PerformAnd(this.L);
break;
case 0xA6:
this.PerformAnd(this.ReadByte(this.HL));
break;
case 0xE6:
var immediate = this.FetchRomByte();
this.PerformAnd(immediate);
break;
}
};
Intel8080.prototype.Instruction_XOR = function () {
switch(this.current_inst) {
case 0xAF:
this.PerformXor(this.A);
break;
case 0xA8:
this.PerformXor(this.B);
break;
case 0xA9:
this.PerformXor(this.C);
break;
case 0xAA:
this.PerformXor(this.D);
break;
case 0xAB:
this.PerformXor(this.E);
break;
case 0xAC:
this.PerformXor(this.H);
break;
case 0xAD:
this.PerformXor(this.L);
break;
case 0xAE:
this.PerformXor(this.ReadByte(this.HL));
break;
case 0xEE:
var immediate = this.FetchRomByte();
this.PerformXor(immediate);
break;
}
};
Intel8080.prototype.Instruction_OR = function () {
switch(this.current_inst) {
case 0xB7:
this.PerformOr(this.A);
break;
case 0xB0:
this.PerformOr(this.B);
break;
case 0xB1:
this.PerformOr(this.C);
break;
case 0xB2:
this.PerformOr(this.D);
break;
case 0xB3:
this.PerformOr(this.E);
break;
case 0xB4:
this.PerformOr(this.H);
break;
case 0xB5:
this.PerformOr(this.L);
break;
case 0xB6:
this.PerformOr(this.ReadByte(this.HL));
break;
case 0xF6:
var immediate = this.FetchRomByte();
this.PerformOr(immediate);
break;
}
};
Intel8080.prototype.Instruction_ADD = function () {
switch(this.current_inst) {
case 0x87:
this.PerformByteAdd(this.A);
break;
case 0x80:
this.PerformByteAdd(this.B);
break;
case 0x81:
this.PerformByteAdd(this.C);
break;
case 0x82:
this.PerformByteAdd(this.D);
break;
case 0x83:
this.PerformByteAdd(this.E);
break;
case 0x84:
this.PerformByteAdd(this.H);
break;
case 0x85:
this.PerformByteAdd(this.L);
break;
case 0x86:
this.PerformByteAdd(this.ReadByte(this.HL));
break;
case 0xC6:
var immediate = this.FetchRomByte();
this.PerformByteAdd(immediate);
break;
}
};
Intel8080.prototype.Instruction_ADC = function () {
var carryvalue = 0;
if(this.CARRY) {
carryvalue = 1;
}
switch(this.current_inst) {
case 0x8F:
this.PerformByteAdd(this.A, carryvalue);
break;
case 0x88:
this.PerformByteAdd(this.B, carryvalue);
break;
case 0x89:
this.PerformByteAdd(this.C, carryvalue);
break;
case 0x8A:
this.PerformByteAdd(this.D, carryvalue);
break;
case 0x8B:
this.PerformByteAdd(this.E, carryvalue);
break;
case 0x8C:
this.PerformByteAdd(this.H, carryvalue);
break;
case 0x8D:
this.PerformByteAdd(this.L, carryvalue);
break;
case 0x8E:
this.PerformByteAdd(this.ReadByte(this.HL), carryvalue);
break;
case 0xCE:
var immediate = this.FetchRomByte();
this.PerformByteAdd(immediate, carryvalue);
break;
}
};
Intel8080.prototype.Instruction_SUB = function () {
switch(this.current_inst) {
case 0x97:
this.PerformByteSub(this.A);
break;
case 0x90:
this.PerformByteSub(this.B);
break;
case 0x91:
this.PerformByteSub(this.C);
break;
case 0x92:
this.PerformByteSub(this.D);
break;
case 0x93:
this.PerformByteSub(this.E);
break;
case 0x94:
this.PerformByteSub(this.H);
break;
case 0x95:
this.PerformByteSub(this.L);
break;
case 0x96:
this.PerformByteSub(this.ReadByte(this.HL));
break;
case 0xD6:
var immediate = this.FetchRomByte();
this.PerformByteSub(immediate);
break;
}
};
Intel8080.prototype.Instruction_SBBI = function () {
var immediate = this.FetchRomByte();
var carryvalue = 0;
if(this.CARRY) {
carryvalue = 1;
}
this.PerformByteSub(immediate, carryvalue);
};
Intel8080.prototype.Instruction_CMP = function () {
var value = 0;
switch(this.current_inst) {
case 0xBF:
value = this.A;
break;
case 0xB8:
value = this.B;
break;
case 0xB9:
value = this.C;
break;
case 0xBA:
value = this.D;
break;
case 0xBB:
value = this.E;
break;
case 0xBC:
value = this.H;
break;
case 0xBD:
value = this.L;
break;
case 0xBE:
value = this.ReadByte(this.HL);
break;
case 0xFE:
value = this.FetchRomByte();
break;
}
this.PerformCompSub(value);
};
Intel8080.prototype.Instruction_XCHG = function () {
var temp = this.DE;
this.SetDE(this.HL);
this.SetHL(temp);
};
Intel8080.prototype.Instruction_XTHL = function () {
var temp = this.H;
this.SetH(this.ReadByte(this.SP + 1));
this.WriteByte(this.SP + 1, temp);
var temp = this.L;
this.SetL(this.ReadByte(this.SP));
this.WriteByte(this.SP, temp);
};
Intel8080.prototype.Instruction_OUTP = function () {
var port = this.FetchRomByte();
this.io.OutPutPort(port, this.A);
};
Intel8080.prototype.Instruction_INP = function () {
var port = this.FetchRomByte();
this.SetA(this.io.InputPort(port));
};
Intel8080.prototype.Instruction_PCHL = function () {
this.PC = this.HL;
};
Intel8080.prototype.Instruction_RST = function () {
var address;
switch(this.current_inst) {
case 0xC7:
address = 0x0;
break;
case 0xCF:
address = 0x8;
break;
case 0xD7:
address = 0x10;
break;
case 0xDF:
address = 0x18;
break;
case 0xE7:
address = 0x20;
break;
case 0xEF:
address = 0x28;
break;
case 0xF7:
address = 0x30;
break;
case 0xFF:
address = 0x38;
break;
}
this.StackPush(this.PC);
this.PC = address;
};
Intel8080.prototype.Instruction_RLC = function () {
this.SetA((this.A << 1) | (this.A >> 7));
this.CARRY = (this.A & 1);
};
Intel8080.prototype.Instruction_RAL = function () {
var temp = this.A;
this.SetA(this.A << 1);
if(this.CARRY) {
this.SetA(this.A | 1);
}
this.CARRY = (temp & 0x80);
};
Intel8080.prototype.Instruction_RRC = function () {
this.SetA((this.A >> 1) | (this.A << 7));
this.CARRY = (this.A & 0x80);
};
Intel8080.prototype.Instruction_RAR = function () {
var temp = this.A & 0xFF;
this.SetA(this.A >> 1);
if(this.CARRY) {
this.SetA(this.A | 0x80);
}
this.CARRY = (temp & 1);
};
Intel8080.prototype.Instruction_RIM = function () {
};
Intel8080.prototype.Instruction_STA = function () {
switch(this.current_inst) {
case 0x02:
this.WriteByte(this.BC, this.A);
break;
case 0x12:
this.WriteByte(this.DE, this.A);
break;
case 0x32:
var immediate = this.FetchRomShort();
this.WriteByte(immediate, this.A);
break;
}
};
Intel8080.prototype.Instruction_DI = function () {
this.INTERRUPT = 0;
};
Intel8080.prototype.Instruction_EI = function () {
this.INTERRUPT = 1;
};
Intel8080.prototype.Instruction_STC = function () {
this.CARRY = 1;
};
Intel8080.prototype.Instruction_CMC = function () {
this.CARRY = Number(!this.CARRY);
};
Intel8080.prototype.Instruction_LHLD = function () {
var immediate = this.FetchRomShort();
this.SetHL(this.ReadShort(immediate));
};
Intel8080.prototype.Instruction_SHLD = function () {
var immediate = this.FetchRomShort();
this.WriteShort(immediate, this.HL);
};
Intel8080.prototype.Instruction_DAA = function () {
if(((this.A & 0x0F) > 9) || (this.HALFCARRY)) {
this.A += 0x06;
this.HALFCARRY = 1;
} else {
this.HALFCARRY = 0;
}
if((this.A > 0x9F) || (this.CARRY)) {
this.A += 0x60;
this.CARRY = 1;
} else {
this.CARRY = 0;
}
this.SetFlagZeroSign();
};
Intel8080.prototype.Instruction_CMA = function () {
this.SetA(this.A ^ 0xFF);
};
Intel8080.prototype.SetFlagZeroSign = function () {
this.ZERO = Number(this.A == 0);
this.SIGN = (this.A & 0x80);
};
Intel8080.prototype.PerformAnd = function (inValue) {
this.SetA(this.A & inValue);
this.CARRY = 0;
this.HALFCARRY = 0;
this.SetFlagZeroSign();
};
Intel8080.prototype.PerformXor = function (inValue) {
this.SetA(this.A ^ inValue);
this.CARRY = 0;
this.HALFCARRY = 0;
this.SetFlagZeroSign();
};
Intel8080.prototype.PerformOr = function (inValue) {
this.SetA(this.A | inValue);
this.CARRY = 0;
this.HALFCARRY = 0;
this.SetFlagZeroSign();
};
Intel8080.prototype.PerformByteAdd = function (inValue, inCarryValue) {
if (typeof inCarryValue === "undefined") { inCarryValue = 0; }
var value = (this.A + inValue + inCarryValue) & 0xFF;
this.HALFCARRY = ((this.A ^ inValue ^ value) & 0x10);
this.SetA(value);
this.CARRY = Number(value > 255);
this.SetFlagZeroSign();
};
Intel8080.prototype.PerformInc = function (inSource) {
var value = (inSource + 1) & 0xFF;
this.HALFCARRY = Number((value & 0xF) != 0);
this.ZERO = Number((value & 255) == 0);
this.SIGN = (value & 128) & 0xFF;
return value;
};
Intel8080.prototype.PerformDec = function (inSource) {
var value = (inSource - 1) & 0xFF;
this.HALFCARRY = Number((value & 0xF) == 0);
this.ZERO = Number((value & 255) == 0);
this.SIGN = (value & 128);
return value;
};
Intel8080.prototype.PerformByteSub = function (inValue, inCarryValue) {
if (typeof inCarryValue === "undefined") { inCarryValue = 0; }
var value = (this.A - inValue - inCarryValue) & 0xFF;
this.CARRY = Number((value >= this.A) && (inValue | inCarryValue));
this.HALFCARRY = ((this.A ^ inValue ^ value) & 0x10);
this.SetA(value);
this.SetFlagZeroSign();
};
Intel8080.prototype.PerformCompSub = function (inValue) {
var value = (this.A - inValue) & 0xFF;
this.CARRY = Number(((value >= this.A) && (inValue)));
this.HALFCARRY = ((this.A ^ inValue ^ value) & 0x10);
this.ZERO = Number((value == 0));
this.SIGN = (value & 128);
};
Intel8080.prototype.init = function () {
this._memory.length = 16384;
this.Reset();
this.InitTables();
};
Intel8080.prototype.setInput = function (input) {
this.io = input;
};
Intel8080.prototype.InitTables = function () {
var lng = this._memory.length;
var code;
for(var i = 0; i < lng; i++) {
code = this._memory[i];
switch(code) {
case 0x00:
this.mappingTable[code] = this.Instruction_NOP;
break;
case 0x01:
this.mappingTable[code] = this.Instruction_LXI_BC;
break;
case 0x02:
this.mappingTable[code] = this.Instruction_STA;
break;
case 0x03:
this.mappingTable[code] = this.Instruction_INX;
break;
case 0x04:
this.mappingTable[code] = this.Instruction_INC;
break;
case 0x05:
this.mappingTable[code] = this.Instruction_DEC;
break;
case 0x06:
this.mappingTable[code] = this.Instruction_MVI_B;
break;
case 0x07:
this.mappingTable[code] = this.Instruction_RLC;
break;
case 0x09:
this.mappingTable[code] = this.Instruction_DAD_BC;
break;
case 0x0A:
this.mappingTable[code] = this.Instruction_LDA;