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Switched to supplying the bus operation by reference, go guarantee that it isn't null.

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This commit is contained in:
Thomas Harte 2017-05-30 19:24:58 -04:00
parent 244b5ba3c2
commit da65bae86e
3 changed files with 15 additions and 19 deletions
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16
Processors/Z80/Z80.hpp
View File

@ -157,15 +157,11 @@ struct MicroOp {
};
/*!
@abstact An abstract base class for emulation of a 6502 processor via the curiously recurring template pattern/f-bounded polymorphism.
@abstact An abstract base class for emulation of a Z80 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
@discussion Subclasses should implement @c perform_machine_cycle in
order to provide the bus on which the Z80 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 MicroOpScheduler<MicroOp> {
private:
@ -668,7 +664,7 @@ template <class T> class Processor: public MicroOpScheduler<MicroOp> {
/*!
Runs the Z80 for a supplied number of cycles.
@discussion Subclasses must implement @c perform_machine_cycle(MachineCycle *cycle) .
@discussion Subclasses must implement @c perform_machine_cycle(const MachineCycle &cycle) .
If it is a read operation then @c value will be seeded with the value 0xff.
@ -699,7 +695,7 @@ template <class T> class Processor: public MicroOpScheduler<MicroOp> {
case MicroOp::BusOperation:
if(number_of_cycles_ < operation->machine_cycle.length) { schedule_program_program_counter_--; return; }
number_of_cycles_ -= operation->machine_cycle.length;
number_of_cycles_ -= static_cast<T *>(this)->perform_machine_cycle(&operation->machine_cycle);
number_of_cycles_ -= static_cast<T *>(this)->perform_machine_cycle(operation->machine_cycle);
break;
case MicroOp::MoveToNextProgram:
move_to_next_program();
@ -1407,7 +1403,7 @@ template <class T> class Processor: public MicroOpScheduler<MicroOp> {
*/
void flush() {}
int perform_machine_cycle(const MachineCycle *cycle) {
int perform_machine_cycle(const MachineCycle &cycle) {
return 0;
}

16
Processors/Z80/Z80AllRAM.cpp
View File

@ -13,19 +13,19 @@ using namespace CPU::Z80;
AllRAMProcessor::AllRAMProcessor() : ::CPU::AllRAMProcessor(65536), delegate_(nullptr) {}
int AllRAMProcessor::perform_machine_cycle(const MachineCycle *cycle) {
uint16_t address = cycle->address ? *cycle->address : 0x0000;
switch(cycle->operation) {
int AllRAMProcessor::perform_machine_cycle(const MachineCycle &cycle) {
uint16_t address = cycle.address ? *cycle.address : 0x0000;
switch(cycle.operation) {
case BusOperation::ReadOpcode:
// printf("%04x %02x [BC=%02x]\n", *cycle->address, memory_[*cycle->address], get_value_of_register(CPU::Z80::Register::BC));
check_address_for_trap(address);
case BusOperation::Read:
// printf("r %04x [%02x] AF:%04x BC:%04x DE:%04x HL:%04x SP:%04x\n", *cycle->address, memory_[*cycle->address], get_value_of_register(CPU::Z80::Register::AF), get_value_of_register(CPU::Z80::Register::BC), get_value_of_register(CPU::Z80::Register::DE), get_value_of_register(CPU::Z80::Register::HL), get_value_of_register(CPU::Z80::Register::StackPointer));
*cycle->value = memory_[address];
*cycle.value = memory_[address];
break;
case BusOperation::Write:
// printf("w %04x\n", *cycle->address);
memory_[address] = *cycle->value;
memory_[address] = *cycle.value;
break;
case BusOperation::Output:
@ -33,7 +33,7 @@ int AllRAMProcessor::perform_machine_cycle(const MachineCycle *cycle) {
case BusOperation::Input:
// This logic is selected specifically because it seems to match
// the FUSE unit tests. It might need factoring out.
*cycle->value = address >> 8;
*cycle.value = address >> 8;
break;
case BusOperation::Internal:
@ -43,10 +43,10 @@ int AllRAMProcessor::perform_machine_cycle(const MachineCycle *cycle) {
printf("???\n");
break;
}
timestamp_ += cycle->length;
timestamp_ += cycle.length;
if(delegate_ != nullptr) {
delegate_->z80_all_ram_processor_did_perform_bus_operation(*this, cycle->operation, address, cycle->value ? *cycle->value : 0x00, timestamp_);
delegate_->z80_all_ram_processor_did_perform_bus_operation(*this, cycle.operation, address, cycle.value ? *cycle.value : 0x00, timestamp_);
}
return 0;

2
Processors/Z80/Z80AllRAM.hpp
View File

@ -22,7 +22,7 @@ class AllRAMProcessor:
public:
AllRAMProcessor();
int perform_machine_cycle(const MachineCycle *cycle);
int perform_machine_cycle(const MachineCycle &cycle);
struct MemoryAccessDelegate {
virtual void z80_all_ram_processor_did_perform_bus_operation(AllRAMProcessor &processor, BusOperation operation, uint16_t address, uint8_t value, int time_stamp) = 0;