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Attempt preliminary track building.

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This commit is contained in:
Thomas Harte
2025-05-30 21:25:07 -04:00
parent a8a97b4606
commit 2ddaf0afa3
1 changed files with 29 additions and 2 deletions
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Storage/Disk/DiskImage/Formats/JFD.cpp
+29 -2
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@@ -66,6 +66,7 @@ std::unique_ptr<Track> JFD::track_at_position(const Track::Address address) cons
}
std::vector<Storage::Encodings::MFM::Sector> sectors;
uint32_t sector = sector_begin;
while(sector < sector_offset_) {
gzseek(file_, sector_offset_ + sector, SEEK_SET);
@@ -79,12 +80,38 @@ std::unique_ptr<Track> JFD::track_at_position(const Track::Address address) cons
}
const auto data = read32();
printf("After %d ms, od %02x, sector %d, crc_size %02x, at %d\n", time_ms, options_density, sector_number, crc_size, data);
// printf("After %d ms, od %02x, sector %d, crc_size %02x, at %d\n", time_ms, options_density, sector_number, crc_size, data);
if(time_ms != 0xff) {
fprintf(stderr, "JFD unimplemented: sector time offsets\n");
}
Storage::Encodings::MFM::Sector new_sector;
new_sector.address.track = uint8_t(address.position.as_int());
new_sector.address.side = uint8_t(address.head);
new_sector.address.sector = sector_number;
new_sector.size = crc_size & 0xf;
new_sector.has_header_crc_error = crc_size & 0x20;
new_sector.has_data_crc_error = crc_size & 0x10;
// TODO: density value might not be double density?
if(data != 0xffffffff) {
new_sector.samples.emplace_back();
new_sector.samples.back().resize(size_t(128 << new_sector.size));
gzseek(file_, data_offset_ + data, SEEK_SET);
gzread(file_, new_sector.samples.back().data(), static_cast<unsigned>(new_sector.samples.back().size()));
}
sectors.push_back(std::move(new_sector));
sector += 8;
}
return {};
return Storage::Encodings::MFM::TrackWithSectors(
Storage::Encodings::MFM::Density::Double,
sectors);
}
bool JFD::represents(const std::string &name) const {