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Moving towards Z80 cycle accuracy

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This commit is contained in:
Adrian Conlon
2026-03-03 10:30:08 +00:00
parent 199232dd53
commit a1afe7f78c
7 changed files with 239 additions and 225 deletions
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inc/IntelProcessor.h
+37 -8
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@@ -150,26 +150,55 @@ namespace EightBit {
//
register16_t& incrementPC() override;
uint8_t fetchInstruction() override;
//
[[nodiscard]] register16_t getWord() final;
void setWord(register16_t value) final;
//
virtual void restart(uint8_t address);
virtual int callConditional(int condition);
virtual int jumpConditional(int condition);
virtual int returnConditional(int condition);
virtual void jr(int8_t offset) noexcept;
virtual int jrConditional(int condition);
virtual void callConditional(bool condition);
virtual void jumpConditional(bool condition);
virtual void jumpRelativeConditional(bool condition);
virtual void returnConditional(bool condition);
virtual void jumpIndirect();
virtual void jump();
void callIndirect();
void call();
virtual void jumpRelative(int8_t offset) noexcept;
void jumpRelative(uint8_t offset) noexcept { jumpRelative((int8_t)offset); }
void ret() override;
virtual void fetchWordMEMPTR();
void jumpIndirect();
void callIndirect();
void resetWorkingRegisters() noexcept;
[[nodiscard]] virtual bool convertCondition(int flag) noexcept = 0;
virtual void jumpConditionalFlag(int flag) {
jumpConditional(convertCondition(flag));
}
virtual void jumpRelativeConditionalFlag(int flag) {
jumpRelativeConditional(convertCondition(flag));
}
virtual void returnConditionalFlag(int flag) {
returnConditional(convertCondition(flag));
}
virtual void callConditionalFlag(int flag) {
callConditional(convertCondition(flag));
}
virtual void cpl() noexcept {
A() = ~A();
}
private:
static std::array<int, 8> m_halfCarryTableAdd;
static std::array<int, 8> m_halfCarryTableSub;
inc/Processor.h
+6
View File
@@ -70,7 +70,13 @@ namespace EightBit {
virtual uint8_t memoryRead();
virtual uint8_t busRead();
virtual register16_t& incrementPC();
virtual register16_t& decrementPC();
virtual void immediateAddress();
uint8_t fetchByte();
virtual uint8_t fetchInstruction();
[[nodiscard]] virtual register16_t getWord() = 0;
virtual void setWord(register16_t value) = 0;