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The operations table is now per-instance.
This commit is contained in:
Thomas Harte
parent
76a73c835c
commit
633af4d404
@ -33,6 +33,15 @@ enum Register {
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S
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};
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/*
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The list of 6502 variants supported by this implementation.
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*/
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enum Personality {
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P6502, // the original 6502, replete with various undocumented instructions
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P65C02, // the 65C02; an extended 6502 with a few extra instructions and addressing modes for existing instructions
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P65SC02, // like the 65C02, but lacking bit instructions
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};
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/*
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Flags as defined on the 6502; can be used to decode the result of @c get_value_of_register(Flags) or to form a value for
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the corresponding set.
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@ -110,6 +119,8 @@ class BusHandler {
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*/
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class ProcessorBase: public ProcessorStorage {
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public:
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ProcessorBase(Personality personality) : ProcessorStorage(personality) {}
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/*!
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Gets the value of a register.
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@ -180,12 +191,6 @@ class ProcessorBase: public ProcessorStorage {
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bool is_jammed();
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};
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enum Personality {
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P6502, // the original 6502, replete with various undocumented instructions
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P65C02, // the 65C02; an extended 6502 with a few extra instructions and addressing modes for existing instructions
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P65SC02, // like the 65C02, but lacking bit instructions
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};
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/*!
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@abstact Template providing emulation of a 6502 processor.
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@ -199,7 +204,7 @@ template <typename T, bool uses_ready_line> class Processor: public ProcessorBas
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/*!
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Constructs an instance of the 6502 that will use @c bus_handler for all bus communications.
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*/
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Processor(Personality personality, T &bus_handler) : bus_handler_(bus_handler) {}
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Processor(Personality personality, T &bus_handler) : ProcessorBase(personality), bus_handler_(bus_handler) {}
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/*!
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Runs the 6502 for a supplied number of cycles.
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@ -97,7 +97,7 @@ if(number_of_cycles <= Cycles(0)) break;
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break;
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case OperationDecodeOperation:
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scheduled_program_counter_ = operations[operation_];
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scheduled_program_counter_ = operations_[operation_];
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continue;
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case OperationMoveToNextProgram:
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@ -160,7 +160,7 @@ if(number_of_cycles <= Cycles(0)) break;
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case CycleScheduleJam: {
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is_jammed_ = true;
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scheduled_program_counter_ = operations[CPU::MOS6502::JamOpcode];
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scheduled_program_counter_ = operations_[CPU::MOS6502::JamOpcode];
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} continue;
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// MARK: - Bitwise
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@ -8,6 +8,8 @@
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#include "../6502.hpp"
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#include <cstring>
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using namespace CPU::MOS6502;
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#define Program(...) {__VA_ARGS__, OperationMoveToNextProgram}
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@ -67,143 +69,153 @@ using namespace CPU::MOS6502;
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#define JAM {CycleFetchOperand, CycleScheduleJam}
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const ProcessorStorage::MicroOp ProcessorStorage::operations[256][10] = {
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/* 0x00 BRK */ Program(CycleIncPCPushPCH, CyclePushPCL, OperationBRKPickVector, OperationSetOperandFromFlagsWithBRKSet, CyclePushOperand, OperationSetI, CycleReadVectorLow, CycleReadVectorHigh),
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/* 0x01 ORA x, ind */ IndexedIndirectRead(OperationORA),
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/* 0x02 JAM */ JAM, /* 0x03 ASO x, ind */ IndexedIndirectReadModifyWrite(OperationASO),
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/* 0x04 NOP zpg */ ZeroNop(), /* 0x05 ORA zpg */ ZeroRead(OperationORA),
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/* 0x06 ASL zpg */ ZeroReadModifyWrite(OperationASL), /* 0x07 ASO zpg */ ZeroReadModifyWrite(OperationASO),
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/* 0x08 PHP */ Program(OperationSetOperandFromFlagsWithBRKSet, CyclePushOperand),
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/* 0x09 ORA # */ Immediate(OperationORA),
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/* 0x0a ASL A */ Implied(OperationASL), /* 0x0b ANC # */ Immediate(OperationANC),
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/* 0x0c NOP abs */ AbsoluteNop(), /* 0x0d ORA abs */ AbsoluteRead(OperationORA),
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/* 0x0e ASL abs */ AbsoluteReadModifyWrite(OperationASL), /* 0x0f ASO abs */ AbsoluteReadModifyWrite(OperationASO),
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/* 0x10 BPL */ Program(OperationBPL), /* 0x11 ORA ind, y */ IndirectIndexedRead(OperationORA),
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/* 0x12 JAM */ JAM, /* 0x13 ASO ind, y */ IndirectIndexedReadModifyWrite(OperationASO),
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/* 0x14 NOP zpg, x */ ZeroXNop(), /* 0x15 ORA zpg, x */ ZeroXRead(OperationORA),
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/* 0x16 ASL zpg, x */ ZeroXReadModifyWrite(OperationASL), /* 0x17 ASO zpg, x */ ZeroXReadModifyWrite(OperationASO),
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/* 0x18 CLC */ Program(OperationCLC), /* 0x19 ORA abs, y */ AbsoluteYRead(OperationORA),
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/* 0x1a NOP # */ ImpliedNop(), /* 0x1b ASO abs, y */ AbsoluteYReadModifyWrite(OperationASO),
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/* 0x1c NOP abs, x */ AbsoluteXNop(), /* 0x1d ORA abs, x */ AbsoluteXRead(OperationORA),
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/* 0x1e ASL abs, x */ AbsoluteXReadModifyWrite(OperationASL), /* 0x1f ASO abs, x */ AbsoluteXReadModifyWrite(OperationASO),
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/* 0x20 JSR abs */ Program(CycleIncrementPCAndReadStack, CyclePushPCH, CyclePushPCL, CycleReadPCHLoadPCL),
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/* 0x21 AND x, ind */ IndexedIndirectRead(OperationAND),
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/* 0x22 JAM */ JAM, /* 0x23 RLA x, ind */ IndexedIndirectReadModifyWrite(OperationRLA),
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/* 0x24 BIT zpg */ ZeroRead(OperationBIT), /* 0x25 AND zpg */ ZeroRead(OperationAND),
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/* 0x26 ROL zpg */ ZeroReadModifyWrite(OperationROL), /* 0x27 RLA zpg */ ZeroReadModifyWrite(OperationRLA),
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/* 0x28 PLP */ Program(CycleReadFromS, CyclePullOperand, OperationSetFlagsFromOperand),
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/* 0x29 AND A # */ Immediate(OperationAND),
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/* 0x2a ROL A */ Implied(OperationROL), /* 0x2b ANC # */ Immediate(OperationANC),
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/* 0x2c BIT abs */ AbsoluteRead(OperationBIT), /* 0x2d AND abs */ AbsoluteRead(OperationAND),
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/* 0x2e ROL abs */ AbsoluteReadModifyWrite(OperationROL), /* 0x2f RLA abs */ AbsoluteReadModifyWrite(OperationRLA),
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/* 0x30 BMI */ Program(OperationBMI), /* 0x31 AND ind, y */ IndirectIndexedRead(OperationAND),
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/* 0x32 JAM */ JAM, /* 0x33 RLA ind, y */ IndirectIndexedReadModifyWrite(OperationRLA),
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/* 0x34 NOP zpg, x */ ZeroXNop(), /* 0x35 AND zpg, x */ ZeroXRead(OperationAND),
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/* 0x36 ROL zpg, x */ ZeroXReadModifyWrite(OperationROL), /* 0x37 RLA zpg, x */ ZeroXReadModifyWrite(OperationRLA),
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/* 0x38 SEC */ Program(OperationSEC), /* 0x39 AND abs, y */ AbsoluteYRead(OperationAND),
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/* 0x3a NOP # */ ImpliedNop(), /* 0x3b RLA abs, y */ AbsoluteYReadModifyWrite(OperationRLA),
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/* 0x3c NOP abs, x */ AbsoluteXNop(), /* 0x3d AND abs, x */ AbsoluteXRead(OperationAND),
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/* 0x3e ROL abs, x */ AbsoluteXReadModifyWrite(OperationROL), /* 0x3f RLA abs, x */ AbsoluteXReadModifyWrite(OperationRLA),
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/* 0x40 RTI */ Program(CycleReadFromS, CyclePullOperand, OperationSetFlagsFromOperand, CyclePullPCL, CyclePullPCH),
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/* 0x41 EOR x, ind */ IndexedIndirectRead(OperationEOR),
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/* 0x42 JAM */ JAM, /* 0x43 LSE x, ind */ IndexedIndirectReadModifyWrite(OperationLSE),
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/* 0x44 NOP zpg */ ZeroNop(), /* 0x45 EOR zpg */ ZeroRead(OperationEOR),
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/* 0x46 LSR zpg */ ZeroReadModifyWrite(OperationLSR), /* 0x47 LSE zpg */ ZeroReadModifyWrite(OperationLSE),
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/* 0x48 PHA */ Program(CyclePushA), /* 0x49 EOR # */ Immediate(OperationEOR),
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/* 0x4a LSR A */ Implied(OperationLSR), /* 0x4b ASR A */ Immediate(OperationASR),
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/* 0x4c JMP abs */ Program(CycleIncrementPCReadPCHLoadPCL), /* 0x4d EOR abs */ AbsoluteRead(OperationEOR),
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/* 0x4e LSR abs */ AbsoluteReadModifyWrite(OperationLSR), /* 0x4f LSE abs */ AbsoluteReadModifyWrite(OperationLSE),
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/* 0x50 BVC */ Program(OperationBVC), /* 0x51 EOR ind, y */ IndirectIndexedRead(OperationEOR),
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/* 0x52 JAM */ JAM, /* 0x53 LSE ind, y */ IndirectIndexedReadModifyWrite(OperationLSE),
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/* 0x54 NOP zpg, x */ ZeroXNop(), /* 0x55 EOR zpg, x */ ZeroXRead(OperationEOR),
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/* 0x56 LSR zpg, x */ ZeroXReadModifyWrite(OperationLSR), /* 0x57 LSE zpg, x */ ZeroXReadModifyWrite(OperationLSE),
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/* 0x58 CLI */ Program(OperationCLI), /* 0x59 EOR abs, y */ AbsoluteYRead(OperationEOR),
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/* 0x5a NOP # */ ImpliedNop(), /* 0x5b LSE abs, y */ AbsoluteYReadModifyWrite(OperationLSE),
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/* 0x5c NOP abs, x */ AbsoluteXNop(), /* 0x5d EOR abs, x */ AbsoluteXRead(OperationEOR),
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/* 0x5e LSR abs, x */ AbsoluteXReadModifyWrite(OperationLSR), /* 0x5f LSE abs, x */ AbsoluteXReadModifyWrite(OperationLSE),
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/* 0x60 RTS */ Program(CycleReadFromS, CyclePullPCL, CyclePullPCH, CycleReadAndIncrementPC),
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/* 0x61 ADC x, ind */ IndexedIndirectRead(OperationADC),
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/* 0x62 JAM */ JAM, /* 0x63 RRA x, ind */ IndexedIndirectReadModifyWrite(OperationRRA, OperationADC),
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/* 0x64 NOP zpg */ ZeroNop(), /* 0x65 ADC zpg */ ZeroRead(OperationADC),
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/* 0x66 ROR zpg */ ZeroReadModifyWrite(OperationROR), /* 0x67 RRA zpg */ ZeroReadModifyWrite(OperationRRA, OperationADC),
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/* 0x68 PLA */ Program(CycleReadFromS, CyclePullA, OperationSetFlagsFromA), /* 0x69 ADC # */ Immediate(OperationADC),
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/* 0x6a ROR A */ Implied(OperationROR), /* 0x6b ARR # */ Immediate(OperationARR),
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/* 0x6c JMP (abs) */ Program(CycleReadAddressHLoadAddressL, CycleReadPCLFromAddress, CycleReadPCHFromAddress),
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/* 0x6d ADC abs */ AbsoluteRead(OperationADC),
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/* 0x6e ROR abs */ AbsoluteReadModifyWrite(OperationROR), /* 0x6f RRA abs */ AbsoluteReadModifyWrite(OperationRRA, OperationADC),
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/* 0x70 BVS */ Program(OperationBVS), /* 0x71 ADC ind, y */ IndirectIndexedRead(OperationADC),
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/* 0x72 JAM */ JAM, /* 0x73 RRA ind, y */ IndirectIndexedReadModifyWrite(OperationRRA, OperationADC),
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/* 0x74 NOP zpg, x */ ZeroXNop(), /* 0x75 ADC zpg, x */ ZeroXRead(OperationADC),
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/* 0x76 ROR zpg, x */ ZeroXReadModifyWrite(OperationROR), /* 0x77 RRA zpg, x */ ZeroXReadModifyWrite(OperationRRA, OperationADC),
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/* 0x78 SEI */ Program(OperationSEI), /* 0x79 ADC abs, y */ AbsoluteYRead(OperationADC),
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/* 0x7a NOP # */ ImpliedNop(), /* 0x7b RRA abs, y */ AbsoluteYReadModifyWrite(OperationRRA, OperationADC),
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/* 0x7c NOP abs, x */ AbsoluteXNop(), /* 0x7d ADC abs, x */ AbsoluteXRead(OperationADC),
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/* 0x7e ROR abs, x */ AbsoluteXReadModifyWrite(OperationROR), /* 0x7f RRA abs, x */ AbsoluteXReadModifyWrite(OperationRRA, OperationADC),
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/* 0x80 NOP # */ ImmediateNop(), /* 0x81 STA x, ind */ IndexedIndirectWrite(OperationSTA),
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/* 0x82 NOP # */ ImmediateNop(), /* 0x83 SAX x, ind */ IndexedIndirectWrite(OperationSAX),
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/* 0x84 STY zpg */ ZeroWrite(OperationSTY), /* 0x85 STA zpg */ ZeroWrite(OperationSTA),
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/* 0x86 STX zpg */ ZeroWrite(OperationSTX), /* 0x87 SAX zpg */ ZeroWrite(OperationSAX),
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/* 0x88 DEY */ Program(OperationDEY), /* 0x89 NOP # */ ImmediateNop(),
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/* 0x8a TXA */ Program(OperationTXA), /* 0x8b ANE # */ Immediate(OperationANE),
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/* 0x8c STY abs */ AbsoluteWrite(OperationSTY), /* 0x8d STA abs */ AbsoluteWrite(OperationSTA),
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/* 0x8e STX abs */ AbsoluteWrite(OperationSTX), /* 0x8f SAX abs */ AbsoluteWrite(OperationSAX),
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/* 0x90 BCC */ Program(OperationBCC), /* 0x91 STA ind, y */ IndirectIndexedWrite(OperationSTA),
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/* 0x92 JAM */ JAM, /* 0x93 SHA ind, y */ IndirectIndexedWrite(OperationSHA),
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/* 0x94 STY zpg, x */ ZeroXWrite(OperationSTY), /* 0x95 STA zpg, x */ ZeroXWrite(OperationSTA),
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/* 0x96 STX zpg, y */ ZeroYWrite(OperationSTX), /* 0x97 SAX zpg, y */ ZeroYWrite(OperationSAX),
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/* 0x98 TYA */ Program(OperationTYA), /* 0x99 STA abs, y */ AbsoluteYWrite(OperationSTA),
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/* 0x9a TXS */ Program(OperationTXS), /* 0x9b SHS abs, y */ AbsoluteYWrite(OperationSHS),
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/* 0x9c SHY abs, x */ AbsoluteXWrite(OperationSHY), /* 0x9d STA abs, x */ AbsoluteXWrite(OperationSTA),
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/* 0x9e SHX abs, y */ AbsoluteYWrite(OperationSHX), /* 0x9f SHA abs, y */ AbsoluteYWrite(OperationSHA),
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/* 0xa0 LDY # */ Immediate(OperationLDY), /* 0xa1 LDA x, ind */ IndexedIndirectRead(OperationLDA),
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/* 0xa2 LDX # */ Immediate(OperationLDX), /* 0xa3 LAX x, ind */ IndexedIndirectRead(OperationLAX),
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/* 0xa4 LDY zpg */ ZeroRead(OperationLDY), /* 0xa5 LDA zpg */ ZeroRead(OperationLDA),
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/* 0xa6 LDX zpg */ ZeroRead(OperationLDX), /* 0xa7 LAX zpg */ ZeroRead(OperationLAX),
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/* 0xa8 TAY */ Program(OperationTAY), /* 0xa9 LDA # */ Immediate(OperationLDA),
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/* 0xaa TAX */ Program(OperationTAX), /* 0xab LXA # */ Immediate(OperationLXA),
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/* 0xac LDY abs */ AbsoluteRead(OperationLDY), /* 0xad LDA abs */ AbsoluteRead(OperationLDA),
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/* 0xae LDX abs */ AbsoluteRead(OperationLDX), /* 0xaf LAX abs */ AbsoluteRead(OperationLAX),
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/* 0xb0 BCS */ Program(OperationBCS), /* 0xb1 LDA ind, y */ IndirectIndexedRead(OperationLDA),
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/* 0xb2 JAM */ JAM, /* 0xb3 LAX ind, y */ IndirectIndexedRead(OperationLAX),
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/* 0xb4 LDY zpg, x */ ZeroXRead(OperationLDY), /* 0xb5 LDA zpg, x */ ZeroXRead(OperationLDA),
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/* 0xb6 LDX zpg, y */ ZeroYRead(OperationLDX), /* 0xb7 LAX zpg, x */ ZeroYRead(OperationLAX),
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/* 0xb8 CLV */ Program(OperationCLV), /* 0xb9 LDA abs, y */ AbsoluteYRead(OperationLDA),
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/* 0xba TSX */ Program(OperationTSX), /* 0xbb LAS abs, y */ AbsoluteYRead(OperationLAS),
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/* 0xbc LDY abs, x */ AbsoluteXRead(OperationLDY), /* 0xbd LDA abs, x */ AbsoluteXRead(OperationLDA),
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/* 0xbe LDX abs, y */ AbsoluteYRead(OperationLDX), /* 0xbf LAX abs, y */ AbsoluteYRead(OperationLAX),
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/* 0xc0 CPY # */ Immediate(OperationCPY), /* 0xc1 CMP x, ind */ IndexedIndirectRead(OperationCMP),
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/* 0xc2 NOP # */ ImmediateNop(), /* 0xc3 DCP x, ind */ IndexedIndirectReadModifyWrite(OperationDecrementOperand, OperationCMP),
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/* 0xc4 CPY zpg */ ZeroRead(OperationCPY), /* 0xc5 CMP zpg */ ZeroRead(OperationCMP),
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/* 0xc6 DEC zpg */ ZeroReadModifyWrite(OperationDEC), /* 0xc7 DCP zpg */ ZeroReadModifyWrite(OperationDecrementOperand, OperationCMP),
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/* 0xc8 INY */ Program(OperationINY), /* 0xc9 CMP # */ Immediate(OperationCMP),
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/* 0xca DEX */ Program(OperationDEX), /* 0xcb ARR # */ Immediate(OperationSBX),
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/* 0xcc CPY abs */ AbsoluteRead(OperationCPY), /* 0xcd CMP abs */ AbsoluteRead(OperationCMP),
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/* 0xce DEC abs */ AbsoluteReadModifyWrite(OperationDEC), /* 0xcf DCP abs */ AbsoluteReadModifyWrite(OperationDecrementOperand, OperationCMP),
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/* 0xd0 BNE */ Program(OperationBNE), /* 0xd1 CMP ind, y */ IndirectIndexedRead(OperationCMP),
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/* 0xd2 JAM */ JAM, /* 0xd3 DCP ind, y */ IndirectIndexedReadModifyWrite(OperationDecrementOperand, OperationCMP),
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/* 0xd4 NOP zpg, x */ ZeroXNop(), /* 0xd5 CMP zpg, x */ ZeroXRead(OperationCMP),
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/* 0xd6 DEC zpg, x */ ZeroXReadModifyWrite(OperationDEC), /* 0xd7 DCP zpg, x */ ZeroXReadModifyWrite(OperationDecrementOperand, OperationCMP),
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/* 0xd8 CLD */ Program(OperationCLD), /* 0xd9 CMP abs, y */ AbsoluteYRead(OperationCMP),
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/* 0xda NOP # */ ImpliedNop(), /* 0xdb DCP abs, y */ AbsoluteYReadModifyWrite(OperationDecrementOperand, OperationCMP),
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/* 0xdc NOP abs, x */ AbsoluteXNop(), /* 0xdd CMP abs, x */ AbsoluteXRead(OperationCMP),
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/* 0xde DEC abs, x */ AbsoluteXReadModifyWrite(OperationDEC), /* 0xdf DCP abs, x */ AbsoluteXReadModifyWrite(OperationDecrementOperand, OperationCMP),
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/* 0xe0 CPX # */ Immediate(OperationCPX), /* 0xe1 SBC x, ind */ IndexedIndirectRead(OperationSBC),
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/* 0xe2 NOP # */ ImmediateNop(), /* 0xe3 INS x, ind */ IndexedIndirectReadModifyWrite(OperationINS),
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/* 0xe4 CPX zpg */ ZeroRead(OperationCPX), /* 0xe5 SBC zpg */ ZeroRead(OperationSBC),
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/* 0xe6 INC zpg */ ZeroReadModifyWrite(OperationINC), /* 0xe7 INS zpg */ ZeroReadModifyWrite(OperationINS),
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/* 0xe8 INX */ Program(OperationINX), /* 0xe9 SBC # */ Immediate(OperationSBC),
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/* 0xea NOP # */ ImpliedNop(), /* 0xeb SBC # */ Immediate(OperationSBC),
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/* 0xec CPX abs */ AbsoluteRead(OperationCPX), /* 0xed SBC abs */ AbsoluteRead(OperationSBC),
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/* 0xee INC abs */ AbsoluteReadModifyWrite(OperationINC), /* 0xef INS abs */ AbsoluteReadModifyWrite(OperationINS),
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/* 0xf0 BEQ */ Program(OperationBEQ), /* 0xf1 SBC ind, y */ IndirectIndexedRead(OperationSBC),
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/* 0xf2 JAM */ JAM, /* 0xf3 INS ind, y */ IndirectIndexedReadModifyWrite(OperationINS),
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/* 0xf4 NOP zpg, x */ ZeroXNop(), /* 0xf5 SBC zpg, x */ ZeroXRead(OperationSBC),
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/* 0xf6 INC zpg, x */ ZeroXReadModifyWrite(OperationINC), /* 0xf7 INS zpg, x */ ZeroXReadModifyWrite(OperationINS),
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/* 0xf8 SED */ Program(OperationSED), /* 0xf9 SBC abs, y */ AbsoluteYRead(OperationSBC),
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/* 0xfa NOP # */ ImpliedNop(), /* 0xfb INS abs, y */ AbsoluteYReadModifyWrite(OperationINS),
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/* 0xfc NOP abs, x */ AbsoluteXNop(), /* 0xfd SBC abs, x */ AbsoluteXRead(OperationSBC),
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/* 0xfe INC abs, x */ AbsoluteXReadModifyWrite(OperationINC), /* 0xff INS abs, x */ AbsoluteXReadModifyWrite(OperationINS),
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};
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ProcessorStorage::ProcessorStorage(Personality) {
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// only the interrupt flag is defined upon reset but get_flags isn't going to
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// mask the other flags so we need to do that, at least
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carry_flag_ &= Flag::Carry;
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decimal_flag_ &= Flag::Decimal;
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overflow_flag_ &= Flag::Overflow;
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const ProcessorStorage::MicroOp operations_6502[256][10] = {
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/* 0x00 BRK */ Program(CycleIncPCPushPCH, CyclePushPCL, OperationBRKPickVector, OperationSetOperandFromFlagsWithBRKSet, CyclePushOperand, OperationSetI, CycleReadVectorLow, CycleReadVectorHigh),
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/* 0x01 ORA x, ind */ IndexedIndirectRead(OperationORA),
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/* 0x02 JAM */ JAM, /* 0x03 ASO x, ind */ IndexedIndirectReadModifyWrite(OperationASO),
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/* 0x04 NOP zpg */ ZeroNop(), /* 0x05 ORA zpg */ ZeroRead(OperationORA),
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/* 0x06 ASL zpg */ ZeroReadModifyWrite(OperationASL), /* 0x07 ASO zpg */ ZeroReadModifyWrite(OperationASO),
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/* 0x08 PHP */ Program(OperationSetOperandFromFlagsWithBRKSet, CyclePushOperand),
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/* 0x09 ORA # */ Immediate(OperationORA),
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/* 0x0a ASL A */ Implied(OperationASL), /* 0x0b ANC # */ Immediate(OperationANC),
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/* 0x0c NOP abs */ AbsoluteNop(), /* 0x0d ORA abs */ AbsoluteRead(OperationORA),
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/* 0x0e ASL abs */ AbsoluteReadModifyWrite(OperationASL), /* 0x0f ASO abs */ AbsoluteReadModifyWrite(OperationASO),
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/* 0x10 BPL */ Program(OperationBPL), /* 0x11 ORA ind, y */ IndirectIndexedRead(OperationORA),
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/* 0x12 JAM */ JAM, /* 0x13 ASO ind, y */ IndirectIndexedReadModifyWrite(OperationASO),
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/* 0x14 NOP zpg, x */ ZeroXNop(), /* 0x15 ORA zpg, x */ ZeroXRead(OperationORA),
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/* 0x16 ASL zpg, x */ ZeroXReadModifyWrite(OperationASL), /* 0x17 ASO zpg, x */ ZeroXReadModifyWrite(OperationASO),
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/* 0x18 CLC */ Program(OperationCLC), /* 0x19 ORA abs, y */ AbsoluteYRead(OperationORA),
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/* 0x1a NOP # */ ImpliedNop(), /* 0x1b ASO abs, y */ AbsoluteYReadModifyWrite(OperationASO),
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/* 0x1c NOP abs, x */ AbsoluteXNop(), /* 0x1d ORA abs, x */ AbsoluteXRead(OperationORA),
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/* 0x1e ASL abs, x */ AbsoluteXReadModifyWrite(OperationASL), /* 0x1f ASO abs, x */ AbsoluteXReadModifyWrite(OperationASO),
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/* 0x20 JSR abs */ Program(CycleIncrementPCAndReadStack, CyclePushPCH, CyclePushPCL, CycleReadPCHLoadPCL),
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/* 0x21 AND x, ind */ IndexedIndirectRead(OperationAND),
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||||
/* 0x22 JAM */ JAM, /* 0x23 RLA x, ind */ IndexedIndirectReadModifyWrite(OperationRLA),
|
||||
/* 0x24 BIT zpg */ ZeroRead(OperationBIT), /* 0x25 AND zpg */ ZeroRead(OperationAND),
|
||||
/* 0x26 ROL zpg */ ZeroReadModifyWrite(OperationROL), /* 0x27 RLA zpg */ ZeroReadModifyWrite(OperationRLA),
|
||||
/* 0x28 PLP */ Program(CycleReadFromS, CyclePullOperand, OperationSetFlagsFromOperand),
|
||||
/* 0x29 AND A # */ Immediate(OperationAND),
|
||||
/* 0x2a ROL A */ Implied(OperationROL), /* 0x2b ANC # */ Immediate(OperationANC),
|
||||
/* 0x2c BIT abs */ AbsoluteRead(OperationBIT), /* 0x2d AND abs */ AbsoluteRead(OperationAND),
|
||||
/* 0x2e ROL abs */ AbsoluteReadModifyWrite(OperationROL), /* 0x2f RLA abs */ AbsoluteReadModifyWrite(OperationRLA),
|
||||
/* 0x30 BMI */ Program(OperationBMI), /* 0x31 AND ind, y */ IndirectIndexedRead(OperationAND),
|
||||
/* 0x32 JAM */ JAM, /* 0x33 RLA ind, y */ IndirectIndexedReadModifyWrite(OperationRLA),
|
||||
/* 0x34 NOP zpg, x */ ZeroXNop(), /* 0x35 AND zpg, x */ ZeroXRead(OperationAND),
|
||||
/* 0x36 ROL zpg, x */ ZeroXReadModifyWrite(OperationROL), /* 0x37 RLA zpg, x */ ZeroXReadModifyWrite(OperationRLA),
|
||||
/* 0x38 SEC */ Program(OperationSEC), /* 0x39 AND abs, y */ AbsoluteYRead(OperationAND),
|
||||
/* 0x3a NOP # */ ImpliedNop(), /* 0x3b RLA abs, y */ AbsoluteYReadModifyWrite(OperationRLA),
|
||||
/* 0x3c NOP abs, x */ AbsoluteXNop(), /* 0x3d AND abs, x */ AbsoluteXRead(OperationAND),
|
||||
/* 0x3e ROL abs, x */ AbsoluteXReadModifyWrite(OperationROL), /* 0x3f RLA abs, x */ AbsoluteXReadModifyWrite(OperationRLA),
|
||||
/* 0x40 RTI */ Program(CycleReadFromS, CyclePullOperand, OperationSetFlagsFromOperand, CyclePullPCL, CyclePullPCH),
|
||||
/* 0x41 EOR x, ind */ IndexedIndirectRead(OperationEOR),
|
||||
/* 0x42 JAM */ JAM, /* 0x43 LSE x, ind */ IndexedIndirectReadModifyWrite(OperationLSE),
|
||||
/* 0x44 NOP zpg */ ZeroNop(), /* 0x45 EOR zpg */ ZeroRead(OperationEOR),
|
||||
/* 0x46 LSR zpg */ ZeroReadModifyWrite(OperationLSR), /* 0x47 LSE zpg */ ZeroReadModifyWrite(OperationLSE),
|
||||
/* 0x48 PHA */ Program(CyclePushA), /* 0x49 EOR # */ Immediate(OperationEOR),
|
||||
/* 0x4a LSR A */ Implied(OperationLSR), /* 0x4b ASR A */ Immediate(OperationASR),
|
||||
/* 0x4c JMP abs */ Program(CycleIncrementPCReadPCHLoadPCL), /* 0x4d EOR abs */ AbsoluteRead(OperationEOR),
|
||||
/* 0x4e LSR abs */ AbsoluteReadModifyWrite(OperationLSR), /* 0x4f LSE abs */ AbsoluteReadModifyWrite(OperationLSE),
|
||||
/* 0x50 BVC */ Program(OperationBVC), /* 0x51 EOR ind, y */ IndirectIndexedRead(OperationEOR),
|
||||
/* 0x52 JAM */ JAM, /* 0x53 LSE ind, y */ IndirectIndexedReadModifyWrite(OperationLSE),
|
||||
/* 0x54 NOP zpg, x */ ZeroXNop(), /* 0x55 EOR zpg, x */ ZeroXRead(OperationEOR),
|
||||
/* 0x56 LSR zpg, x */ ZeroXReadModifyWrite(OperationLSR), /* 0x57 LSE zpg, x */ ZeroXReadModifyWrite(OperationLSE),
|
||||
/* 0x58 CLI */ Program(OperationCLI), /* 0x59 EOR abs, y */ AbsoluteYRead(OperationEOR),
|
||||
/* 0x5a NOP # */ ImpliedNop(), /* 0x5b LSE abs, y */ AbsoluteYReadModifyWrite(OperationLSE),
|
||||
/* 0x5c NOP abs, x */ AbsoluteXNop(), /* 0x5d EOR abs, x */ AbsoluteXRead(OperationEOR),
|
||||
/* 0x5e LSR abs, x */ AbsoluteXReadModifyWrite(OperationLSR), /* 0x5f LSE abs, x */ AbsoluteXReadModifyWrite(OperationLSE),
|
||||
/* 0x60 RTS */ Program(CycleReadFromS, CyclePullPCL, CyclePullPCH, CycleReadAndIncrementPC),
|
||||
/* 0x61 ADC x, ind */ IndexedIndirectRead(OperationADC),
|
||||
/* 0x62 JAM */ JAM, /* 0x63 RRA x, ind */ IndexedIndirectReadModifyWrite(OperationRRA, OperationADC),
|
||||
/* 0x64 NOP zpg */ ZeroNop(), /* 0x65 ADC zpg */ ZeroRead(OperationADC),
|
||||
/* 0x66 ROR zpg */ ZeroReadModifyWrite(OperationROR), /* 0x67 RRA zpg */ ZeroReadModifyWrite(OperationRRA, OperationADC),
|
||||
/* 0x68 PLA */ Program(CycleReadFromS, CyclePullA, OperationSetFlagsFromA), /* 0x69 ADC # */ Immediate(OperationADC),
|
||||
/* 0x6a ROR A */ Implied(OperationROR), /* 0x6b ARR # */ Immediate(OperationARR),
|
||||
/* 0x6c JMP (abs) */ Program(CycleReadAddressHLoadAddressL, CycleReadPCLFromAddress, CycleReadPCHFromAddress),
|
||||
/* 0x6d ADC abs */ AbsoluteRead(OperationADC),
|
||||
/* 0x6e ROR abs */ AbsoluteReadModifyWrite(OperationROR), /* 0x6f RRA abs */ AbsoluteReadModifyWrite(OperationRRA, OperationADC),
|
||||
/* 0x70 BVS */ Program(OperationBVS), /* 0x71 ADC ind, y */ IndirectIndexedRead(OperationADC),
|
||||
/* 0x72 JAM */ JAM, /* 0x73 RRA ind, y */ IndirectIndexedReadModifyWrite(OperationRRA, OperationADC),
|
||||
/* 0x74 NOP zpg, x */ ZeroXNop(), /* 0x75 ADC zpg, x */ ZeroXRead(OperationADC),
|
||||
/* 0x76 ROR zpg, x */ ZeroXReadModifyWrite(OperationROR), /* 0x77 RRA zpg, x */ ZeroXReadModifyWrite(OperationRRA, OperationADC),
|
||||
/* 0x78 SEI */ Program(OperationSEI), /* 0x79 ADC abs, y */ AbsoluteYRead(OperationADC),
|
||||
/* 0x7a NOP # */ ImpliedNop(), /* 0x7b RRA abs, y */ AbsoluteYReadModifyWrite(OperationRRA, OperationADC),
|
||||
/* 0x7c NOP abs, x */ AbsoluteXNop(), /* 0x7d ADC abs, x */ AbsoluteXRead(OperationADC),
|
||||
/* 0x7e ROR abs, x */ AbsoluteXReadModifyWrite(OperationROR), /* 0x7f RRA abs, x */ AbsoluteXReadModifyWrite(OperationRRA, OperationADC),
|
||||
/* 0x80 NOP # */ ImmediateNop(), /* 0x81 STA x, ind */ IndexedIndirectWrite(OperationSTA),
|
||||
/* 0x82 NOP # */ ImmediateNop(), /* 0x83 SAX x, ind */ IndexedIndirectWrite(OperationSAX),
|
||||
/* 0x84 STY zpg */ ZeroWrite(OperationSTY), /* 0x85 STA zpg */ ZeroWrite(OperationSTA),
|
||||
/* 0x86 STX zpg */ ZeroWrite(OperationSTX), /* 0x87 SAX zpg */ ZeroWrite(OperationSAX),
|
||||
/* 0x88 DEY */ Program(OperationDEY), /* 0x89 NOP # */ ImmediateNop(),
|
||||
/* 0x8a TXA */ Program(OperationTXA), /* 0x8b ANE # */ Immediate(OperationANE),
|
||||
/* 0x8c STY abs */ AbsoluteWrite(OperationSTY), /* 0x8d STA abs */ AbsoluteWrite(OperationSTA),
|
||||
/* 0x8e STX abs */ AbsoluteWrite(OperationSTX), /* 0x8f SAX abs */ AbsoluteWrite(OperationSAX),
|
||||
/* 0x90 BCC */ Program(OperationBCC), /* 0x91 STA ind, y */ IndirectIndexedWrite(OperationSTA),
|
||||
/* 0x92 JAM */ JAM, /* 0x93 SHA ind, y */ IndirectIndexedWrite(OperationSHA),
|
||||
/* 0x94 STY zpg, x */ ZeroXWrite(OperationSTY), /* 0x95 STA zpg, x */ ZeroXWrite(OperationSTA),
|
||||
/* 0x96 STX zpg, y */ ZeroYWrite(OperationSTX), /* 0x97 SAX zpg, y */ ZeroYWrite(OperationSAX),
|
||||
/* 0x98 TYA */ Program(OperationTYA), /* 0x99 STA abs, y */ AbsoluteYWrite(OperationSTA),
|
||||
/* 0x9a TXS */ Program(OperationTXS), /* 0x9b SHS abs, y */ AbsoluteYWrite(OperationSHS),
|
||||
/* 0x9c SHY abs, x */ AbsoluteXWrite(OperationSHY), /* 0x9d STA abs, x */ AbsoluteXWrite(OperationSTA),
|
||||
/* 0x9e SHX abs, y */ AbsoluteYWrite(OperationSHX), /* 0x9f SHA abs, y */ AbsoluteYWrite(OperationSHA),
|
||||
/* 0xa0 LDY # */ Immediate(OperationLDY), /* 0xa1 LDA x, ind */ IndexedIndirectRead(OperationLDA),
|
||||
/* 0xa2 LDX # */ Immediate(OperationLDX), /* 0xa3 LAX x, ind */ IndexedIndirectRead(OperationLAX),
|
||||
/* 0xa4 LDY zpg */ ZeroRead(OperationLDY), /* 0xa5 LDA zpg */ ZeroRead(OperationLDA),
|
||||
/* 0xa6 LDX zpg */ ZeroRead(OperationLDX), /* 0xa7 LAX zpg */ ZeroRead(OperationLAX),
|
||||
/* 0xa8 TAY */ Program(OperationTAY), /* 0xa9 LDA # */ Immediate(OperationLDA),
|
||||
/* 0xaa TAX */ Program(OperationTAX), /* 0xab LXA # */ Immediate(OperationLXA),
|
||||
/* 0xac LDY abs */ AbsoluteRead(OperationLDY), /* 0xad LDA abs */ AbsoluteRead(OperationLDA),
|
||||
/* 0xae LDX abs */ AbsoluteRead(OperationLDX), /* 0xaf LAX abs */ AbsoluteRead(OperationLAX),
|
||||
/* 0xb0 BCS */ Program(OperationBCS), /* 0xb1 LDA ind, y */ IndirectIndexedRead(OperationLDA),
|
||||
/* 0xb2 JAM */ JAM, /* 0xb3 LAX ind, y */ IndirectIndexedRead(OperationLAX),
|
||||
/* 0xb4 LDY zpg, x */ ZeroXRead(OperationLDY), /* 0xb5 LDA zpg, x */ ZeroXRead(OperationLDA),
|
||||
/* 0xb6 LDX zpg, y */ ZeroYRead(OperationLDX), /* 0xb7 LAX zpg, x */ ZeroYRead(OperationLAX),
|
||||
/* 0xb8 CLV */ Program(OperationCLV), /* 0xb9 LDA abs, y */ AbsoluteYRead(OperationLDA),
|
||||
/* 0xba TSX */ Program(OperationTSX), /* 0xbb LAS abs, y */ AbsoluteYRead(OperationLAS),
|
||||
/* 0xbc LDY abs, x */ AbsoluteXRead(OperationLDY), /* 0xbd LDA abs, x */ AbsoluteXRead(OperationLDA),
|
||||
/* 0xbe LDX abs, y */ AbsoluteYRead(OperationLDX), /* 0xbf LAX abs, y */ AbsoluteYRead(OperationLAX),
|
||||
/* 0xc0 CPY # */ Immediate(OperationCPY), /* 0xc1 CMP x, ind */ IndexedIndirectRead(OperationCMP),
|
||||
/* 0xc2 NOP # */ ImmediateNop(), /* 0xc3 DCP x, ind */ IndexedIndirectReadModifyWrite(OperationDecrementOperand, OperationCMP),
|
||||
/* 0xc4 CPY zpg */ ZeroRead(OperationCPY), /* 0xc5 CMP zpg */ ZeroRead(OperationCMP),
|
||||
/* 0xc6 DEC zpg */ ZeroReadModifyWrite(OperationDEC), /* 0xc7 DCP zpg */ ZeroReadModifyWrite(OperationDecrementOperand, OperationCMP),
|
||||
/* 0xc8 INY */ Program(OperationINY), /* 0xc9 CMP # */ Immediate(OperationCMP),
|
||||
/* 0xca DEX */ Program(OperationDEX), /* 0xcb ARR # */ Immediate(OperationSBX),
|
||||
/* 0xcc CPY abs */ AbsoluteRead(OperationCPY), /* 0xcd CMP abs */ AbsoluteRead(OperationCMP),
|
||||
/* 0xce DEC abs */ AbsoluteReadModifyWrite(OperationDEC), /* 0xcf DCP abs */ AbsoluteReadModifyWrite(OperationDecrementOperand, OperationCMP),
|
||||
/* 0xd0 BNE */ Program(OperationBNE), /* 0xd1 CMP ind, y */ IndirectIndexedRead(OperationCMP),
|
||||
/* 0xd2 JAM */ JAM, /* 0xd3 DCP ind, y */ IndirectIndexedReadModifyWrite(OperationDecrementOperand, OperationCMP),
|
||||
/* 0xd4 NOP zpg, x */ ZeroXNop(), /* 0xd5 CMP zpg, x */ ZeroXRead(OperationCMP),
|
||||
/* 0xd6 DEC zpg, x */ ZeroXReadModifyWrite(OperationDEC), /* 0xd7 DCP zpg, x */ ZeroXReadModifyWrite(OperationDecrementOperand, OperationCMP),
|
||||
/* 0xd8 CLD */ Program(OperationCLD), /* 0xd9 CMP abs, y */ AbsoluteYRead(OperationCMP),
|
||||
/* 0xda NOP # */ ImpliedNop(), /* 0xdb DCP abs, y */ AbsoluteYReadModifyWrite(OperationDecrementOperand, OperationCMP),
|
||||
/* 0xdc NOP abs, x */ AbsoluteXNop(), /* 0xdd CMP abs, x */ AbsoluteXRead(OperationCMP),
|
||||
/* 0xde DEC abs, x */ AbsoluteXReadModifyWrite(OperationDEC), /* 0xdf DCP abs, x */ AbsoluteXReadModifyWrite(OperationDecrementOperand, OperationCMP),
|
||||
/* 0xe0 CPX # */ Immediate(OperationCPX), /* 0xe1 SBC x, ind */ IndexedIndirectRead(OperationSBC),
|
||||
/* 0xe2 NOP # */ ImmediateNop(), /* 0xe3 INS x, ind */ IndexedIndirectReadModifyWrite(OperationINS),
|
||||
/* 0xe4 CPX zpg */ ZeroRead(OperationCPX), /* 0xe5 SBC zpg */ ZeroRead(OperationSBC),
|
||||
/* 0xe6 INC zpg */ ZeroReadModifyWrite(OperationINC), /* 0xe7 INS zpg */ ZeroReadModifyWrite(OperationINS),
|
||||
/* 0xe8 INX */ Program(OperationINX), /* 0xe9 SBC # */ Immediate(OperationSBC),
|
||||
/* 0xea NOP # */ ImpliedNop(), /* 0xeb SBC # */ Immediate(OperationSBC),
|
||||
/* 0xec CPX abs */ AbsoluteRead(OperationCPX), /* 0xed SBC abs */ AbsoluteRead(OperationSBC),
|
||||
/* 0xee INC abs */ AbsoluteReadModifyWrite(OperationINC), /* 0xef INS abs */ AbsoluteReadModifyWrite(OperationINS),
|
||||
/* 0xf0 BEQ */ Program(OperationBEQ), /* 0xf1 SBC ind, y */ IndirectIndexedRead(OperationSBC),
|
||||
/* 0xf2 JAM */ JAM, /* 0xf3 INS ind, y */ IndirectIndexedReadModifyWrite(OperationINS),
|
||||
/* 0xf4 NOP zpg, x */ ZeroXNop(), /* 0xf5 SBC zpg, x */ ZeroXRead(OperationSBC),
|
||||
/* 0xf6 INC zpg, x */ ZeroXReadModifyWrite(OperationINC), /* 0xf7 INS zpg, x */ ZeroXReadModifyWrite(OperationINS),
|
||||
/* 0xf8 SED */ Program(OperationSED), /* 0xf9 SBC abs, y */ AbsoluteYRead(OperationSBC),
|
||||
/* 0xfa NOP # */ ImpliedNop(), /* 0xfb INS abs, y */ AbsoluteYReadModifyWrite(OperationINS),
|
||||
/* 0xfc NOP abs, x */ AbsoluteXNop(), /* 0xfd SBC abs, x */ AbsoluteXRead(OperationSBC),
|
||||
/* 0xfe INC abs, x */ AbsoluteXReadModifyWrite(OperationINC), /* 0xff INS abs, x */ AbsoluteXReadModifyWrite(OperationINS),
|
||||
};
|
||||
|
||||
memcpy(operations_, operations_6502, sizeof(operations_));
|
||||
}
|
||||
|
||||
#undef Program
|
||||
#undef Absolute
|
||||
@ -243,11 +255,3 @@ const ProcessorStorage::MicroOp ProcessorStorage::operations[256][10] = {
|
||||
#undef IndirectIndexedReadModify
|
||||
#undef Immediate
|
||||
#undef Implied
|
||||
|
||||
ProcessorStorage::ProcessorStorage() {
|
||||
// only the interrupt flag is defined upon reset but get_flags isn't going to
|
||||
// mask the other flags so we need to do that, at least
|
||||
carry_flag_ &= Flag::Carry;
|
||||
decimal_flag_ &= Flag::Decimal;
|
||||
overflow_flag_ &= Flag::Overflow;
|
||||
}
|
||||
|
||||
@ -15,7 +15,7 @@
|
||||
*/
|
||||
class ProcessorStorage {
|
||||
protected:
|
||||
ProcessorStorage();
|
||||
ProcessorStorage(Personality);
|
||||
|
||||
/*
|
||||
This emulation functions by decomposing instructions into micro programs, consisting of the micro operations
|
||||
@ -62,7 +62,7 @@ class ProcessorStorage {
|
||||
CycleScheduleJam
|
||||
};
|
||||
|
||||
static const MicroOp operations[256][10];
|
||||
MicroOp operations_[256][10];
|
||||
|
||||
const MicroOp *scheduled_program_counter_ = nullptr;
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user