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79 lines
2.6 KiB
C++
79 lines
2.6 KiB
C++
//
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// StaticAnalyser.cpp
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// Clock Signal
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//
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// Created by Thomas Harte on 25/11/2017.
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// Copyright © 2017 Thomas Harte. All rights reserved.
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//
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#include "StaticAnalyser.hpp"
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#include "Tape.hpp"
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/*
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Expected standard cartridge format:
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DEFB "AB" ; expansion ROM header
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DEFW initcode ; start of the init code, 0 if no initcode
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DEFW callstat; pointer to CALL statement handler, 0 if no such handler
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DEFW device; pointer to expansion device handler, 0 if no such handler
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DEFW basic ; pointer to the start of a tokenized basicprogram, 0 if no basicprogram
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DEFS 6,0 ; room reserved for future extensions
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*/
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static std::list<std::shared_ptr<Storage::Cartridge::Cartridge>>
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MSXCartridgesFrom(const std::list<std::shared_ptr<Storage::Cartridge::Cartridge>> &cartridges) {
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std::list<std::shared_ptr<Storage::Cartridge::Cartridge>> msx_cartridges;
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for(const auto &cartridge : cartridges) {
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const auto &segments = cartridge->get_segments();
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// Only one mapped item is allowed.
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if(segments.size() != 1) continue;
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// Which must be a multiple of 16 kb in size.
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Storage::Cartridge::Cartridge::Segment segment = segments.front();
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const size_t data_size = segment.data.size();
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if(data_size < 0x2000 || data_size & 0x3fff) continue;
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// Check for a ROM header at address 0; TODO: if it's not found then try 0x4000
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// and consider swapping the image.
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// Check for the expansion ROM header and the reserved bytes.
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if(segment.data[0] != 0x41 || segment.data[1] != 0x42) continue;
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// Apply the standard MSX start address.
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msx_cartridges.emplace_back(new Storage::Cartridge::Cartridge({
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Storage::Cartridge::Cartridge::Segment(0x4000, segment.data)
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}));
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}
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return msx_cartridges;
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}
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void StaticAnalyser::MSX::AddTargets(const Media &media, std::list<Target> &destination) {
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Target target;
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// Obtain only those cartridges which it looks like an MSX would understand.
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target.media.cartridges = MSXCartridgesFrom(media.cartridges);
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// Check tapes for loadable files.
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for(const auto &tape : media.tapes) {
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std::vector<File> files_on_tape = GetFiles(tape);
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if(!files_on_tape.empty()) {
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switch(files_on_tape.front().type) {
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case File::Type::ASCII: target.loading_command = "RUN\"CAS:\r"; break;
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case File::Type::TokenisedBASIC: target.loading_command = "CLOAD\rRUN\r"; break;
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case File::Type::Binary: target.loading_command = "BLOAD\"CAS:\",R\r"; break;
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default: break;
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}
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target.media.tapes.push_back(tape);
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}
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}
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if(!target.media.empty()) {
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target.machine = Target::MSX;
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target.probability = 1.0;
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destination.push_back(target);
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}
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}
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