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54 lines
1.7 KiB
C++
54 lines
1.7 KiB
C++
//
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// Z80AllRAM.cpp
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// Clock Signal
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//
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// Created by Thomas Harte on 16/05/2017.
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// Copyright © 2017 Thomas Harte. All rights reserved.
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//
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#include "Z80AllRAM.hpp"
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#include <algorithm>
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using namespace CPU::Z80;
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AllRAMProcessor::AllRAMProcessor() : ::CPU::AllRAMProcessor(65536), delegate_(nullptr) {}
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int AllRAMProcessor::perform_machine_cycle(const MachineCycle *cycle) {
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uint16_t address = cycle->address ? *cycle->address : 0x0000;
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switch(cycle->operation) {
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case BusOperation::ReadOpcode:
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// printf("%04x %02x [BC=%02x]\n", *cycle->address, memory_[*cycle->address], get_value_of_register(CPU::Z80::Register::BC));
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check_address_for_trap(address);
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case BusOperation::Read:
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// 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));
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*cycle->value = memory_[address];
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break;
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case BusOperation::Write:
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// printf("w %04x\n", *cycle->address);
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memory_[address] = *cycle->value;
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break;
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case BusOperation::Output:
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break;
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case BusOperation::Input:
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// This logic is selected specifically because it seems to match
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// the FUSE unit tests. It might need factoring out.
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*cycle->value = address >> 8;
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break;
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case BusOperation::Internal:
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break;
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default:
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printf("???\n");
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break;
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}
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timestamp_ += cycle->length;
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if(delegate_ != nullptr) {
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delegate_->z80_all_ram_processor_did_perform_bus_operation(*this, cycle->operation, address, cycle->value ? *cycle->value : 0x00, timestamp_);
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}
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return 0;
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}
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