mirror of
https://github.com/TomHarte/CLK.git
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Eliminated the function call inherent to every decode, and also moved the fixed table of operations into a non-templated base class.
This commit is contained in:
Thomas Harte
parent
c26349624c
commit
1a811b1ab1
@ -9,3 +9,237 @@
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#include "6502.hpp"
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const uint8_t CPU::MOS6502::JamOpcode = 0xf2;
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#define Program(...) {__VA_ARGS__, OperationMoveToNextProgram}
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#define Absolute CycleLoadAddressAbsolute
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#define AbsoluteXr CycleLoadAddressAbsolute, CycleAddXToAddressLow, OperationCorrectAddressHigh
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#define AbsoluteYr CycleLoadAddressAbsolute, CycleAddYToAddressLow, OperationCorrectAddressHigh
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#define AbsoluteX CycleLoadAddressAbsolute, CycleAddXToAddressLowRead, OperationCorrectAddressHigh
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#define AbsoluteY CycleLoadAddressAbsolute, CycleAddYToAddressLowRead, OperationCorrectAddressHigh
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#define Zero OperationLoadAddressZeroPage
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#define ZeroX CycleLoadAddessZeroX
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#define ZeroY CycleLoadAddessZeroY
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#define IndexedIndirect CycleIncrementPCFetchAddressLowFromOperand, CycleAddXToOperandFetchAddressLow, CycleIncrementOperandFetchAddressHigh
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#define IndirectIndexedr CycleIncrementPCFetchAddressLowFromOperand, CycleIncrementOperandFetchAddressHigh, CycleAddYToAddressLow, OperationCorrectAddressHigh
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#define IndirectIndexed CycleIncrementPCFetchAddressLowFromOperand, CycleIncrementOperandFetchAddressHigh, CycleAddYToAddressLowRead, OperationCorrectAddressHigh
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#define Read(...) CycleFetchOperandFromAddress, __VA_ARGS__
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#define Write(...) __VA_ARGS__, CycleWriteOperandToAddress
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#define ReadModifyWrite(...) CycleFetchOperandFromAddress, CycleWriteOperandToAddress, __VA_ARGS__, CycleWriteOperandToAddress
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#define AbsoluteRead(op) Program(Absolute, Read(op))
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#define AbsoluteXRead(op) Program(AbsoluteXr, Read(op))
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#define AbsoluteYRead(op) Program(AbsoluteYr, Read(op))
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#define ZeroRead(...) Program(Zero, Read(__VA_ARGS__))
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#define ZeroXRead(op) Program(ZeroX, Read(op))
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#define ZeroYRead(op) Program(ZeroY, Read(op))
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#define IndexedIndirectRead(op) Program(IndexedIndirect, Read(op))
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#define IndirectIndexedRead(op) Program(IndirectIndexedr, Read(op))
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#define AbsoluteWrite(op) Program(Absolute, Write(op))
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#define AbsoluteXWrite(op) Program(AbsoluteX, Write(op))
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#define AbsoluteYWrite(op) Program(AbsoluteY, Write(op))
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#define ZeroWrite(op) Program(Zero, Write(op))
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#define ZeroXWrite(op) Program(ZeroX, Write(op))
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#define ZeroYWrite(op) Program(ZeroY, Write(op))
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#define IndexedIndirectWrite(op) Program(IndexedIndirect, Write(op))
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#define IndirectIndexedWrite(op) Program(IndirectIndexed, Write(op))
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#define AbsoluteReadModifyWrite(...) Program(Absolute, ReadModifyWrite(__VA_ARGS__))
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#define AbsoluteXReadModifyWrite(...) Program(AbsoluteX, ReadModifyWrite(__VA_ARGS__))
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#define AbsoluteYReadModifyWrite(...) Program(AbsoluteY, ReadModifyWrite(__VA_ARGS__))
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#define ZeroReadModifyWrite(...) Program(Zero, ReadModifyWrite(__VA_ARGS__))
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#define ZeroXReadModifyWrite(...) Program(ZeroX, ReadModifyWrite(__VA_ARGS__))
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#define ZeroYReadModifyWrite(...) Program(ZeroY, ReadModifyWrite(__VA_ARGS__))
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#define IndexedIndirectReadModifyWrite(...) Program(IndexedIndirect, ReadModifyWrite(__VA_ARGS__))
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#define IndirectIndexedReadModifyWrite(...) Program(IndirectIndexed, ReadModifyWrite(__VA_ARGS__))
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#define Immediate(op) Program(OperationIncrementPC, op)
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#define Implied(op) Program(OperationCopyOperandFromA, op, OperationCopyOperandToA)
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#define ZeroNop() Program(Zero, CycleFetchOperandFromAddress)
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#define ZeroXNop() Program(ZeroX, CycleFetchOperandFromAddress)
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#define AbsoluteNop() Program(Absolute)
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#define AbsoluteXNop() Program(AbsoluteX)
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#define ImpliedNop() {OperationMoveToNextProgram}
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#define ImmediateNop() Program(OperationIncrementPC)
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#define JAM {CycleFetchOperand, CycleScheduleJam}
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const CPU::MOS6502::ProcessorBase::MicroOp CPU::MOS6502::ProcessorBase::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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#undef Program
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#undef Absolute
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#undef AbsoluteX
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#undef AbsoluteY
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#undef Zero
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#undef ZeroX
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#undef ZeroY
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#undef IndexedIndirect
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#undef IndirectIndexed
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#undef Read
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#undef Write
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#undef ReadModifyWrite
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#undef AbsoluteRead
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#undef AbsoluteXRead
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#undef AbsoluteYRead
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#undef ZeroRead
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#undef ZeroXRead
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#undef ZeroYRead
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#undef IndexedIndirectRead
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#undef IndirectIndexedRead
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#undef AbsoluteWrite
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#undef AbsoluteXWrite
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#undef AbsoluteYWrite
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#undef ZeroWrite
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#undef ZeroXWrite
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#undef ZeroYWrite
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#undef IndexedIndirectWrite
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#undef IndirectIndexedWrite
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#undef AbsoluteReadModifyWrite
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#undef AbsoluteXReadModifyWrite
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#undef AbsoluteYReadModifyWrite
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#undef ZeroReadModifyWrite
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#undef ZeroXReadModifyWrite
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#undef ZeroYReadModify
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#undef IndexedIndirectReadModify
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#undef IndirectIndexedReadModify
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#undef Immediate
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#undef Implied
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@ -66,20 +66,8 @@ enum BusOperation {
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*/
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extern const uint8_t JamOpcode;
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/*!
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@abstact An abstract base class for emulation of a 6502 processor via the curiously recurring template pattern/f-bounded polymorphism.
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@discussion Subclasses should implement @c perform_bus_operation(BusOperation operation, uint16_t address, uint8_t *value) in
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order to provide the bus on which the 6502 operates and @c flush(), which is called upon completion of a continuous run
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||||
of cycles to allow a subclass to bring any on-demand activities up to date.
|
||||
|
||||
Additional functionality can be provided by the host machine by providing a jam handler and inserting jam opcodes where appropriate;
|
||||
that will cause call outs when the program counter reaches those addresses. @c return_from_subroutine can be used to exit from a
|
||||
jammed state.
|
||||
*/
|
||||
template <class T> class Processor {
|
||||
private:
|
||||
|
||||
class ProcessorBase {
|
||||
protected:
|
||||
/*
|
||||
This emulation functions by decomposing instructions into micro programs, consisting of the micro operations
|
||||
as per the enum below. Each micro op takes at most one cycle. By convention, those called CycleX take a cycle
|
||||
@ -124,9 +112,24 @@ template <class T> class Processor {
|
||||
OperationSetFlagsFromA,
|
||||
CycleScheduleJam
|
||||
};
|
||||
const MicroOp *scheduled_program_counter_;
|
||||
|
||||
#define JAM {CycleFetchOperand, CycleScheduleJam}
|
||||
static const MicroOp operations[256][10];
|
||||
};
|
||||
|
||||
/*!
|
||||
@abstact An abstract base class for emulation of a 6502 processor via the curiously recurring template pattern/f-bounded polymorphism.
|
||||
|
||||
@discussion Subclasses should implement @c perform_bus_operation(BusOperation operation, uint16_t address, uint8_t *value) in
|
||||
order to provide the bus on which the 6502 operates and @c flush(), which is called upon completion of a continuous run
|
||||
of cycles to allow a subclass to bring any on-demand activities up to date.
|
||||
|
||||
Additional functionality can be provided by the host machine by providing a jam handler and inserting jam opcodes where appropriate;
|
||||
that will cause call outs when the program counter reaches those addresses. @c return_from_subroutine can be used to exit from a
|
||||
jammed state.
|
||||
*/
|
||||
template <class T> class Processor: public ProcessorBase {
|
||||
private:
|
||||
const MicroOp *scheduled_program_counter_;
|
||||
|
||||
/*
|
||||
Storage for the 6502 registers; F is stored as individual flags.
|
||||
@ -176,248 +179,6 @@ template <class T> class Processor {
|
||||
decimal_flag_ = flags & Flag::Decimal;
|
||||
}
|
||||
|
||||
/*!
|
||||
Schedules the program corresponding to the specified operation.
|
||||
|
||||
@param operation The operation code for which to schedule a program.
|
||||
*/
|
||||
inline void decode_operation(uint8_t operation) {
|
||||
#define Program(...) {__VA_ARGS__, OperationMoveToNextProgram}
|
||||
|
||||
#define Absolute CycleLoadAddressAbsolute
|
||||
#define AbsoluteXr CycleLoadAddressAbsolute, CycleAddXToAddressLow, OperationCorrectAddressHigh
|
||||
#define AbsoluteYr CycleLoadAddressAbsolute, CycleAddYToAddressLow, OperationCorrectAddressHigh
|
||||
#define AbsoluteX CycleLoadAddressAbsolute, CycleAddXToAddressLowRead, OperationCorrectAddressHigh
|
||||
#define AbsoluteY CycleLoadAddressAbsolute, CycleAddYToAddressLowRead, OperationCorrectAddressHigh
|
||||
#define Zero OperationLoadAddressZeroPage
|
||||
#define ZeroX CycleLoadAddessZeroX
|
||||
#define ZeroY CycleLoadAddessZeroY
|
||||
#define IndexedIndirect CycleIncrementPCFetchAddressLowFromOperand, CycleAddXToOperandFetchAddressLow, CycleIncrementOperandFetchAddressHigh
|
||||
#define IndirectIndexedr CycleIncrementPCFetchAddressLowFromOperand, CycleIncrementOperandFetchAddressHigh, CycleAddYToAddressLow, OperationCorrectAddressHigh
|
||||
#define IndirectIndexed CycleIncrementPCFetchAddressLowFromOperand, CycleIncrementOperandFetchAddressHigh, CycleAddYToAddressLowRead, OperationCorrectAddressHigh
|
||||
|
||||
#define Read(...) CycleFetchOperandFromAddress, __VA_ARGS__
|
||||
#define Write(...) __VA_ARGS__, CycleWriteOperandToAddress
|
||||
#define ReadModifyWrite(...) CycleFetchOperandFromAddress, CycleWriteOperandToAddress, __VA_ARGS__, CycleWriteOperandToAddress
|
||||
|
||||
#define AbsoluteRead(op) Program(Absolute, Read(op))
|
||||
#define AbsoluteXRead(op) Program(AbsoluteXr, Read(op))
|
||||
#define AbsoluteYRead(op) Program(AbsoluteYr, Read(op))
|
||||
#define ZeroRead(...) Program(Zero, Read(__VA_ARGS__))
|
||||
#define ZeroXRead(op) Program(ZeroX, Read(op))
|
||||
#define ZeroYRead(op) Program(ZeroY, Read(op))
|
||||
#define IndexedIndirectRead(op) Program(IndexedIndirect, Read(op))
|
||||
#define IndirectIndexedRead(op) Program(IndirectIndexedr, Read(op))
|
||||
|
||||
#define AbsoluteWrite(op) Program(Absolute, Write(op))
|
||||
#define AbsoluteXWrite(op) Program(AbsoluteX, Write(op))
|
||||
#define AbsoluteYWrite(op) Program(AbsoluteY, Write(op))
|
||||
#define ZeroWrite(op) Program(Zero, Write(op))
|
||||
#define ZeroXWrite(op) Program(ZeroX, Write(op))
|
||||
#define ZeroYWrite(op) Program(ZeroY, Write(op))
|
||||
#define IndexedIndirectWrite(op) Program(IndexedIndirect, Write(op))
|
||||
#define IndirectIndexedWrite(op) Program(IndirectIndexed, Write(op))
|
||||
|
||||
#define AbsoluteReadModifyWrite(...) Program(Absolute, ReadModifyWrite(__VA_ARGS__))
|
||||
#define AbsoluteXReadModifyWrite(...) Program(AbsoluteX, ReadModifyWrite(__VA_ARGS__))
|
||||
#define AbsoluteYReadModifyWrite(...) Program(AbsoluteY, ReadModifyWrite(__VA_ARGS__))
|
||||
#define ZeroReadModifyWrite(...) Program(Zero, ReadModifyWrite(__VA_ARGS__))
|
||||
#define ZeroXReadModifyWrite(...) Program(ZeroX, ReadModifyWrite(__VA_ARGS__))
|
||||
#define ZeroYReadModifyWrite(...) Program(ZeroY, ReadModifyWrite(__VA_ARGS__))
|
||||
#define IndexedIndirectReadModifyWrite(...) Program(IndexedIndirect, ReadModifyWrite(__VA_ARGS__))
|
||||
#define IndirectIndexedReadModifyWrite(...) Program(IndirectIndexed, ReadModifyWrite(__VA_ARGS__))
|
||||
|
||||
#define Immediate(op) Program(OperationIncrementPC, op)
|
||||
#define Implied(op) Program(OperationCopyOperandFromA, op, OperationCopyOperandToA)
|
||||
|
||||
#define ZeroNop() Program(Zero, CycleFetchOperandFromAddress)
|
||||
#define ZeroXNop() Program(ZeroX, CycleFetchOperandFromAddress)
|
||||
#define AbsoluteNop() Program(Absolute)
|
||||
#define AbsoluteXNop() Program(AbsoluteX)
|
||||
#define ImpliedNop() {OperationMoveToNextProgram}
|
||||
#define ImmediateNop() Program(OperationIncrementPC)
|
||||
|
||||
static const MicroOp operations[256][10] = {
|
||||
|
||||
/* 0x00 BRK */ Program(CycleIncPCPushPCH, CyclePushPCL, OperationBRKPickVector, OperationSetOperandFromFlagsWithBRKSet, CyclePushOperand, OperationSetI, CycleReadVectorLow, CycleReadVectorHigh),
|
||||
/* 0x01 ORA x, ind */ IndexedIndirectRead(OperationORA),
|
||||
/* 0x02 JAM */ JAM, /* 0x03 ASO x, ind */ IndexedIndirectReadModifyWrite(OperationASO),
|
||||
/* 0x04 NOP zpg */ ZeroNop(), /* 0x05 ORA zpg */ ZeroRead(OperationORA),
|
||||
/* 0x06 ASL zpg */ ZeroReadModifyWrite(OperationASL), /* 0x07 ASO zpg */ ZeroReadModifyWrite(OperationASO),
|
||||
/* 0x08 PHP */ Program(OperationSetOperandFromFlagsWithBRKSet, CyclePushOperand),
|
||||
/* 0x09 ORA # */ Immediate(OperationORA),
|
||||
/* 0x0a ASL A */ Implied(OperationASL), /* 0x0b ANC # */ Immediate(OperationANC),
|
||||
/* 0x0c NOP abs */ AbsoluteNop(), /* 0x0d ORA abs */ AbsoluteRead(OperationORA),
|
||||
/* 0x0e ASL abs */ AbsoluteReadModifyWrite(OperationASL), /* 0x0f ASO abs */ AbsoluteReadModifyWrite(OperationASO),
|
||||
/* 0x10 BPL */ Program(OperationBPL), /* 0x11 ORA ind, y */ IndirectIndexedRead(OperationORA),
|
||||
/* 0x12 JAM */ JAM, /* 0x13 ASO ind, y */ IndirectIndexedReadModifyWrite(OperationASO),
|
||||
/* 0x14 NOP zpg, x */ ZeroXNop(), /* 0x15 ORA zpg, x */ ZeroXRead(OperationORA),
|
||||
/* 0x16 ASL zpg, x */ ZeroXReadModifyWrite(OperationASL), /* 0x17 ASO zpg, x */ ZeroXReadModifyWrite(OperationASO),
|
||||
/* 0x18 CLC */ Program(OperationCLC), /* 0x19 ORA abs, y */ AbsoluteYRead(OperationORA),
|
||||
/* 0x1a NOP # */ ImpliedNop(), /* 0x1b ASO abs, y */ AbsoluteYReadModifyWrite(OperationASO),
|
||||
/* 0x1c NOP abs, x */ AbsoluteXNop(), /* 0x1d ORA abs, x */ AbsoluteXRead(OperationORA),
|
||||
/* 0x1e ASL abs, x */ AbsoluteXReadModifyWrite(OperationASL), /* 0x1f ASO abs, x */ AbsoluteXReadModifyWrite(OperationASO),
|
||||
/* 0x20 JSR abs */ Program(CycleIncrementPCAndReadStack, CyclePushPCH, CyclePushPCL, CycleReadPCHLoadPCL),
|
||||
/* 0x21 AND x, ind */ IndexedIndirectRead(OperationAND),
|
||||
/* 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),
|
||||
};
|
||||
|
||||
#undef Program
|
||||
#undef Absolute
|
||||
#undef AbsoluteX
|
||||
#undef AbsoluteY
|
||||
#undef Zero
|
||||
#undef ZeroX
|
||||
#undef ZeroY
|
||||
#undef IndexedIndirect
|
||||
#undef IndirectIndexed
|
||||
#undef Read
|
||||
#undef Write
|
||||
#undef ReadModifyWrite
|
||||
#undef AbsoluteRead
|
||||
#undef AbsoluteXRead
|
||||
#undef AbsoluteYRead
|
||||
#undef ZeroRead
|
||||
#undef ZeroXRead
|
||||
#undef ZeroYRead
|
||||
#undef IndexedIndirectRead
|
||||
#undef IndirectIndexedRead
|
||||
#undef AbsoluteWrite
|
||||
#undef AbsoluteXWrite
|
||||
#undef AbsoluteYWrite
|
||||
#undef ZeroWrite
|
||||
#undef ZeroXWrite
|
||||
#undef ZeroYWrite
|
||||
#undef IndexedIndirectWrite
|
||||
#undef IndirectIndexedWrite
|
||||
#undef AbsoluteReadModifyWrite
|
||||
#undef AbsoluteXReadModifyWrite
|
||||
#undef AbsoluteYReadModifyWrite
|
||||
#undef ZeroReadModifyWrite
|
||||
#undef ZeroXReadModifyWrite
|
||||
#undef ZeroYReadModify
|
||||
#undef IndexedIndirectReadModify
|
||||
#undef IndirectIndexedReadModify
|
||||
#undef Immediate
|
||||
#undef Implied
|
||||
|
||||
scheduled_program_counter_ = operations[operation];
|
||||
}
|
||||
|
||||
bool is_jammed_;
|
||||
int cycles_left_to_run_;
|
||||
|
||||
@ -629,7 +390,7 @@ template <class T> class Processor {
|
||||
|
||||
case OperationDecodeOperation:
|
||||
// printf("d %02x\n", operation_);
|
||||
decode_operation(operation_);
|
||||
scheduled_program_counter_ = operations[operation_];
|
||||
continue;
|
||||
|
||||
case OperationMoveToNextProgram:
|
||||
@ -692,8 +453,7 @@ template <class T> class Processor {
|
||||
|
||||
case CycleScheduleJam: {
|
||||
is_jammed_ = true;
|
||||
static const MicroOp jam[] = JAM;
|
||||
scheduled_program_counter_ = jam;
|
||||
scheduled_program_counter_ = operations[CPU::MOS6502::JamOpcode];
|
||||
} continue;
|
||||
|
||||
#pragma mark - Bitwise
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user