6502/CLK
1
0
Fork 0
mirror of https://github.com/TomHarte/CLK.git synced 2025-11-03 09:16:11 +00:00
Code Issues Projects Releases Wiki Activity

Merge branch 'Turbo6502' into BBCNew6502

Browse Source
This commit is contained in:
Thomas Harte
2025-10-27 17:27:04 -04:00
parent 193c027c8b bc5b7a6725
commit 350f424055
2 changed files with 13 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
Processors/6502Mk2/6502Mk2.hpp
View File

@@ -114,9 +114,9 @@ struct NoValue {
class Writeable { class Writeable {
public: public:
uint8_t operator=(const uint8_t value) { uint8_t operator=(const uint8_t value) {
if constexpr (requires{did_write_;}) { #ifndef NDEBUG
did_write_ = true; did_write_ = true;
} #endif
return result_ = value; return result_ = value;
} }
operator uint8_t() const { operator uint8_t() const {
@@ -126,19 +126,11 @@ public:
private: private:
uint8_t result_; uint8_t result_;
friend struct WriteableReader;
#ifndef NDEBUG #ifndef NDEBUG
bool did_write_ = false; bool did_write_ = false;
#endif #endif
}; };
struct WriteableReader {
static void assign(uint8_t &lhs, const Writeable rhs) {
lhs = rhs;
}
static void assign(const uint8_t &, const Writeable) {}
};
template <BusOperation, typename Enable = void> struct Value; template <BusOperation, typename Enable = void> struct Value;
template <BusOperation operation> struct Value<operation, std::enable_if_t<is_read(operation)>> { template <BusOperation operation> struct Value<operation, std::enable_if_t<is_read(operation)>> {
using type = Writeable &; using type = Writeable &;

9
Processors/6502Mk2/Implementation/6502.hpp
View File

@@ -29,6 +29,13 @@ void Processor<model, Traits>::run_for(const Cycles cycles) {
Storage::cycles_ += cycles; Storage::cycles_ += cycles;
if(Storage::cycles_ <= Cycles(0)) return; if(Storage::cycles_ <= Cycles(0)) return;
struct WriteableReader {
static void assign(uint8_t &lhs, const Data::Writeable rhs) {
lhs = rhs;
}
static void assign(const uint8_t &, const Data::Writeable) {}
};
#define restore_point() (__COUNTER__ + int(ResumePoint::Max) + int(AddressingMode::Max)) #define restore_point() (__COUNTER__ + int(ResumePoint::Max) + int(AddressingMode::Max))
#define join(a, b) a##b #define join(a, b) a##b
@@ -62,7 +69,7 @@ void Processor<model, Traits>::run_for(const Cycles cycles) {
} else { \ } else { \
Data::Writeable target; \ Data::Writeable target; \
Storage::cycles_ -= Storage::bus_handler_.template perform<type>(addr, target); \ Storage::cycles_ -= Storage::bus_handler_.template perform<type>(addr, target); \
Data::WriteableReader::assign(value, target); \ WriteableReader::assign(value, target); \
} \ } \
} else { \ } else { \
Storage::cycles_ -= Storage::bus_handler_.template perform<type>(addr, value); \ Storage::cycles_ -= Storage::bus_handler_.template perform<type>(addr, value); \