mirror of
https://github.com/MoleskiCoder/EightBit.git
synced 2024-06-01 07:41:51 +00:00
100 lines
2.4 KiB
C++
100 lines
2.4 KiB
C++
#include "stdafx.h"
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#include "Board.h"
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#include "Configuration.h"
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#include <iostream>
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Board::Board(const Configuration& configuration)
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: m_configuration(configuration),
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m_cpu(EightBit::Intel8080(*this)),
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m_disassembler(*this) {
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}
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void Board::raisePOWER() {
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EightBit::Bus::raisePOWER();
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CPU().raisePOWER();
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CPU().raiseRESET();
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CPU().raiseINT();
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}
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void Board::lowerPOWER() {
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CPU().lowerPOWER();
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EightBit::Bus::lowerPOWER();
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}
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void Board::initialise() {
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auto romDirectory = m_configuration.getRomDirectory();
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//m_ram.load(romDirectory + "/TEST.COM", 0x100); // Microcosm
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//m_ram.load(romDirectory + "/8080PRE.COM", 0x100); // Bartholomew preliminary
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m_ram.load(romDirectory + "/8080EX1.COM", 0x100); // Cringle/Bartholomew
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//m_ram.load(romDirectory + "/CPUTEST.COM", 0x100); // SuperSoft diagnostics
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m_cpu.LoweredHALT.connect([this](EightBit::EventArgs) {
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lowerPOWER();
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});
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m_cpu.ExecutingInstruction.connect(std::bind(&Board::Cpu_ExecutingInstruction_Cpm, this, std::placeholders::_1));
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if (m_configuration.isProfileMode()) {
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m_cpu.ExecutingInstruction.connect(std::bind(&Board::Cpu_ExecutingInstruction_Profile, this, std::placeholders::_1));
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}
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if (m_configuration.isDebugMode()) {
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m_cpu.ExecutingInstruction.connect(std::bind(&Board::Cpu_ExecutingInstruction_Debug, this, std::placeholders::_1));
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}
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poke(0, 0xc3); // JMP
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CPU().pokeWord(1, m_configuration.getStartAddress());
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poke(5, 0xc9); // ret
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}
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void Board::Cpu_ExecutingInstruction_Cpm(EightBit::Intel8080& cpu) {
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switch (cpu.PC().word) {
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case 0x0: // CP/M warm start
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if (++m_warmstartCount == 2) {
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lowerPOWER();
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if (m_configuration.isProfileMode()) {
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m_profiler.dump();
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}
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}
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break;
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case 0x5: // BDOS
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bdos();
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break;
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default:
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break;
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}
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}
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void Board::bdos() {
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switch (CPU().C()) {
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case 0x2: {
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const auto character = CPU().E();
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std::cout << character;
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break;
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}
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case 0x9:
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for (uint16_t i = CPU().DE().word; peek(i) != '$'; ++i) {
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std::cout << peek(i);
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}
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break;
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}
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}
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void Board::Cpu_ExecutingInstruction_Profile(EightBit::Intel8080& cpu) {
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const auto pc = cpu.PC();
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m_profiler.addAddress(pc.word);
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m_profiler.addInstruction(peek(pc.word));
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}
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void Board::Cpu_ExecutingInstruction_Debug(const EightBit::Intel8080& cpu) {
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const std::string disassembled =
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EightBit::Disassembler::state(CPU()) + '\t' + m_disassembler.disassemble(CPU()) + '\n';
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std::cerr << disassembled;
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}
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