2023-12-05 15:46:06 +00:00
|
|
|
//
|
|
|
|
// StaticAnalyser.cpp
|
|
|
|
// Clock Signal
|
|
|
|
//
|
|
|
|
// Created by Thomas Harte on 05/12/2023.
|
|
|
|
// Copyright 2023 Thomas Harte. All rights reserved.
|
|
|
|
//
|
|
|
|
|
|
|
|
#include "StaticAnalyser.hpp"
|
|
|
|
|
2023-12-05 17:24:53 +00:00
|
|
|
#include "../Enterprise/StaticAnalyser.hpp"
|
|
|
|
#include "../PCCompatible/StaticAnalyser.hpp"
|
2023-12-05 15:46:06 +00:00
|
|
|
|
|
|
|
#include "../../../Storage/Disk/Track/TrackSerialiser.hpp"
|
2023-12-05 17:24:53 +00:00
|
|
|
#include "../../../Storage/Disk/Encodings/MFM/Constants.hpp"
|
|
|
|
#include "../../../Storage/Disk/Encodings/MFM/SegmentParser.hpp"
|
2023-12-05 15:46:06 +00:00
|
|
|
|
|
|
|
|
2023-12-05 17:24:53 +00:00
|
|
|
Analyser::Static::TargetList Analyser::Static::FAT12::GetTargets(const Media &media, const std::string &file_name, TargetPlatform::IntType platforms) {
|
2023-12-05 15:46:06 +00:00
|
|
|
// This analyser can comprehend disks only.
|
|
|
|
if(media.disks.empty()) return {};
|
|
|
|
|
2023-12-05 17:24:53 +00:00
|
|
|
auto &disk = media.disks.front();
|
2023-12-05 15:46:06 +00:00
|
|
|
TargetList targets;
|
|
|
|
|
2023-12-05 17:24:53 +00:00
|
|
|
// Total list of potential platforms is:
|
|
|
|
//
|
|
|
|
// * the Enterprise;
|
|
|
|
// * the Atari ST;
|
|
|
|
// * the MSX; and
|
|
|
|
// * the PC.
|
|
|
|
//
|
|
|
|
// (though the MSX and Atari ST don't currently call in here for now)
|
|
|
|
|
|
|
|
// If the disk image is very small, map it to the PC. That's the only option old enough
|
|
|
|
// to have used 5.25" media.
|
|
|
|
if(disk->get_maximum_head_position() <= Storage::Disk::HeadPosition(40)) {
|
|
|
|
return Analyser::Static::PCCompatible::GetTargets(media, file_name, platforms);
|
2023-12-05 15:46:06 +00:00
|
|
|
}
|
|
|
|
|
2023-12-05 17:24:53 +00:00
|
|
|
// Attempt to grab MFM track 0, sector 1: the boot sector.
|
2023-12-05 15:46:06 +00:00
|
|
|
const auto track_zero = disk->get_track_at_position(Storage::Disk::Track::Address(0, Storage::Disk::HeadPosition(0)));
|
2023-12-05 17:24:53 +00:00
|
|
|
const auto sector_map = Storage::Encodings::MFM::sectors_from_segment(
|
|
|
|
Storage::Disk::track_serialisation(
|
|
|
|
*track_zero,
|
|
|
|
Storage::Encodings::MFM::MFMBitLength
|
|
|
|
), true);
|
|
|
|
|
|
|
|
// If no sectors were found, assume this disk was single density, which also implies the PC.
|
|
|
|
if(sector_map.empty()) {
|
|
|
|
return Analyser::Static::PCCompatible::GetTargets(media, file_name, platforms);
|
|
|
|
}
|
2023-12-05 15:46:06 +00:00
|
|
|
|
2023-12-05 17:24:53 +00:00
|
|
|
const Storage::Encodings::MFM::Sector *boot_sector = nullptr;
|
2023-12-05 15:46:06 +00:00
|
|
|
for(const auto &pair: sector_map) {
|
2023-12-05 17:24:53 +00:00
|
|
|
if(pair.second.address.sector == 1) {
|
|
|
|
boot_sector = &pair.second;
|
2023-12-05 15:46:06 +00:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2023-12-05 17:24:53 +00:00
|
|
|
// This shouldn't technically be possible since the disk has been identified as FAT12, but be safe.
|
|
|
|
if(!boot_sector) {
|
|
|
|
return {};
|
2023-12-05 15:46:06 +00:00
|
|
|
}
|
|
|
|
|
2023-12-05 17:24:53 +00:00
|
|
|
// Check for key phrases that imply a PC disk.
|
|
|
|
const auto &sample = boot_sector->samples[0];
|
|
|
|
const std::vector<std::string> pc_strings = {
|
|
|
|
"MSDOS",
|
|
|
|
"Non-System disk or disk error",
|
|
|
|
"Insert a SYSTEM disk",
|
|
|
|
};
|
|
|
|
for(const auto &string: pc_strings) {
|
2023-12-05 15:46:06 +00:00
|
|
|
if(
|
2023-12-05 17:24:53 +00:00
|
|
|
std::search(sample.begin(), sample.end(), string.begin(), string.end()) != sample.end()
|
|
|
|
) {
|
|
|
|
return Analyser::Static::PCCompatible::GetTargets(media, file_name, platforms);
|
2023-12-05 15:46:06 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2023-12-05 17:24:53 +00:00
|
|
|
// TODO: attempt disassembly as 8086.
|
2023-12-05 15:46:06 +00:00
|
|
|
|
2023-12-05 17:24:53 +00:00
|
|
|
// Being unable to prove that this is a PC disk, throw it to the Enterprise.
|
|
|
|
return Analyser::Static::Enterprise::GetTargets(media, file_name, platforms);
|
2023-12-05 15:46:06 +00:00
|
|
|
}
|