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fix getting address of cluster 0 #31

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fix getting address of cluster 0 #31

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7 changes: 3 additions & 4 deletions src/core/FatSystem.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -312,15 +312,14 @@ bool FatSystem::validCluster(unsigned int cluster)

unsigned long long FatSystem::clusterAddress(unsigned int cluster, bool isRoot)
{
if (type == FAT32 || !isRoot) {
cluster -= 2;
}

unsigned long long addr = (dataStart + bytesPerSector*sectorsPerCluster*cluster);

if (type == FAT16 && !isRoot) {
addr += rootEntries * FAT_ENTRY_SIZE;
}
if (type == FAT32 || !isRoot) {
addr -= bytesPerSector*sectorsPerCluster*2;
}

return addr;
}
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