Merged FAT16 into Dev

Hopefully with success

source/kernel/filesystem/FAT/BiosParameterBlock.h

@@ -0,0 +1,21 @@
+#pragma once
+#include <stdint.h>
+#include "./ExtendBootRecord.h"
+
+struct BiosParameterBlock {
+    uint8_t BootLoaderCodeSection [3];
+    uint8_t OEM_id [8];
+    uint16_t  BytesPerSector ; // I suspect would be 512
+    uint8_t SectorsPerCluster ; 
+    uint16_t ReservedSectors;
+    uint8_t NumberOfFileAllocationTables; // Probably equals 2
+    uint16_t NumberOfDirectoryEntries; // Root directory must contain entire sectors
+    uint16_t TotalSectorsInLogicalVolume ; // 0 means >65535 sectors in volume , actual count can be found in LargeSectorCount
+    uint8_t MediaDescriptor ; // Indication the media descriptor type
+    uint16_t NumberOfSectorsPerFAT;// only in FAT12 / FAT 16
+    uint16_t NumberOfSectorsPerTrack; 
+    uint16_t NumberOfHeadsOnMedia;
+    uint32_t NumberOfHiddenSectors;
+    uint32_t LargeSectorCount;
+    ExtendedBootRecord_FAT16 ebpb;
+}__attribute__((packed));

source/kernel/filesystem/FAT/DirectoryEntry.h

@@ -0,0 +1,19 @@
+#pragma once 
+#include <stdint.h>
+
+struct DirectoryEntry {
+    uint8_t filename [8];
+    uint8_t Extension [3];
+    uint8_t attribute;
+    uint8_t Reserved;
+    uint8_t creation;
+    uint16_t CreationTime;
+    uint16_t CreationDate;
+    uint16_t LastAccessDate;
+    uint16_t ReservedFAT32;
+    uint16_t LastWriteTime;
+    uint16_t LastWriteDate;
+    uint16_t StartingCluster;
+    uint32_t FilesizeInBytes;
+
+}__attribute__((packed));

source/kernel/filesystem/FAT/ExtendBootRecord.h

@@ -0,0 +1,32 @@
+#pragma once 
+#include <stdint.h>
+
+struct ExtendedBootRecord_FAT16{
+    uint8_t DriveNumber;
+    uint8_t Reserved;
+    uint8_t Signature;
+    const uint32_t VOLUME_ID_SERIAL_NUMBER;
+    uint8_t volume_label [11];
+    uint8_t Identifier_string [8];
+    uint8_t bootCode [448];
+    uint16_t partitionSignature;
+}__attribute__((packed));
+
+struct ExtendedBootRecord_FAT32{
+    uint32_t SectorsPerFAT;
+    uint16_t Flags;
+    const uint16_t FAT_VERSION_NUMBER;
+    uint32_t rootDirectory_clusterNumber;// Often set to 2;
+    uint16_t FSInfo_SectorNumber;
+    uint16_t backup_bpb_sectorNumber;
+    uint8_t Reserved [12];
+    uint8_t DriveNumber;
+    uint8_t Reserved2;
+    uint8_t Signature; // must be 0x28 or 0x29 
+    uint32_t VOLUME_ID_SERIAL;
+    uint8_t volume_label[11];
+    uint8_t SystemIdentifierString [8]; // ALWAYS "FAT32 " but spec says do not trust
+    uint8_t BootCode [420]; // NICE
+    uint16_t PartitionSignature; // 0xAA55
+
+}__attribute__((packed));