| 48 | } |
| 49 | |
| 50 | void decodeSectorRecord() override |
| 51 | { |
| 52 | /* Skip the ID pattern and track word, which is only present on the |
| 53 | * first sector. We don't trust the track word because some driver |
| 54 | * don't write it correctly. */ |
| 55 | |
| 56 | if (_currentSector == 0) |
| 57 | readRawBits(64); |
| 58 | |
| 59 | auto bits = readRawBits((SECTOR_SIZE + 2) * 16); |
| 60 | auto bytes = decodeFmMfm(bits).slice(0, SECTOR_SIZE + 2); |
| 61 | |
| 62 | uint16_t gotChecksum = 0; |
| 63 | ByteReader br(bytes); |
| 64 | for (int i = 0; i < (SECTOR_SIZE / 2); i++) |
| 65 | gotChecksum += br.read_be16(); |
| 66 | uint16_t wantChecksum = br.read_be16(); |
| 67 | |
| 68 | _sector->logicalCylinder = _ltl->logicalCylinder; |
| 69 | _sector->logicalHead = _ltl->logicalHead; |
| 70 | _sector->logicalSector = _currentSector; |
| 71 | _sector->data = bytes.slice(0, SECTOR_SIZE).swab(); |
| 72 | _sector->status = |
| 73 | (gotChecksum == wantChecksum) ? Sector::OK : Sector::BAD_CHECKSUM; |
| 74 | _currentSector++; |
| 75 | } |
| 76 | |
| 77 | private: |
| 78 | nanoseconds_t _clock; |
nothing calls this directly
no test coverage detected