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Merge pull request #370 from TomHarte/OricDiskDetection

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Causes the Oric properly to evaluate disks offered to it.
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Thomas Harte 2018-03-21 20:51:12 -04:00 committed by GitHub
commit ece3a05504
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1 changed files with 32 additions and 3 deletions
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35
Analyser/Static/Oric/StaticAnalyser.cpp
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@ -10,9 +10,12 @@
#include "Tape.hpp"
#include "Target.hpp"
#include "../Disassembler/6502.hpp"
#include "../Disassembler/AddressMapper.hpp"
#include "../../../Storage/Disk/Encodings/MFM/Parser.hpp"
using namespace Analyser::Static::Oric;
static int Score(const Analyser::Static::MOS6502::Disassembly &disassembly, const std::set<uint16_t> &rom_functions, const std::set<uint16_t> &variable_locations) {
@ -74,6 +77,27 @@ static int Basic11Score(const Analyser::Static::MOS6502::Disassembly &disassembl
return Score(disassembly, rom_functions, variable_locations);
}
static bool IsMicrodisc(Storage::Encodings::MFM::Parser &parser) {
/*
The Microdisc boot sector is sector 2 of track 0 and contains a 23-byte signature.
*/
Storage::Encodings::MFM::Sector *sector = parser.get_sector(0, 0, 2);
if(!sector) return false;
if(sector->samples.empty()) return false;
const std::vector<uint8_t> &first_sample = sector->samples[0];
if(first_sample.size() != 256) return false;
const uint8_t signature[] = {
0x00, 0x00, 0xFF, 0x00, 0xD0, 0x9F, 0xD0,
0x9F, 0x02, 0xB9, 0x01, 0x00, 0xFF, 0x00,
0x00, 0xB9, 0xE4, 0xB9, 0x00, 0x00, 0xE6,
0x12, 0x00
};
return !memcmp(signature, first_sample.data(), sizeof(signature));
}
void Analyser::Static::Oric::AddTargets(const Media &media, std::vector<std::unique_ptr<Analyser::Static::Target>> &destination) {
std::unique_ptr<Target> target(new Target);
target->machine = Machine::Oric;
@ -103,10 +127,15 @@ void Analyser::Static::Oric::AddTargets(const Media &media, std::vector<std::uni
}
}
// trust that any disk supplied can be handled by the Microdisc. TODO: check.
if(!media.disks.empty()) {
target->has_microdisc = true;
target->media.disks = media.disks;
// Only the Microdisc is emulated right now, so accept only disks that it can boot from.
for(const auto &disk: media.disks) {
Storage::Encodings::MFM::Parser parser(true, disk);
if(IsMicrodisc(parser)) {
target->has_microdisc = true;
target->media.disks.push_back(disk);
}
}
} else {
target->has_microdisc = false;
}