74 lines
1.3 KiB
PHP
74 lines
1.3 KiB
PHP
;; File: fat.inc
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;;
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;; Usefull links:
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;; - <Spec at https://academy.cba.mit.edu/classes/networking_communications/SD/FAT.pdf>
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FAT_SECTOR_SIZE = 512
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FAT_MDIR_SIZE = 32
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struc FATFS_BootSectorBase {
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.jump db 3 dup(?)
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.oemName db 8 dup(?)
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.byts_per_sec dw ?
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.sec_per_clus db ?
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.rsvd_sec_cnt dw ?
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.num_fats db ?
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.root_ent_cnt dw ?
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.tot_sec16 dw ?
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.media db ?
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.fat_sz16 dw ?
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.sec_per_trk dw ?
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.num_heads dw ?
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.hidd_sec dd ?
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.tot_sec32 dd ?
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}
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struc FATFS_BootSector16 {
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.base FATFS_BootSectorBase
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;; Extended BPB Structure
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.drv_num db ?
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.reserved1 db 0
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.boot_sig db ?
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.volume_id dd ?
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.volume_label db 11 dup(?)
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.filsys_type db 8 dup(?)
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.code db 448 dup(?)
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.signature dw ?
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}
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struc FATFS_BootSector32 {
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.base FATFS_BootSectorBase
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.fat_sz32 dd ?
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.ext_flags dw ?
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.fs_ver dw ?
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.root_clus dd ?
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.fs_info dw ?
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.bk_boot_sec dw ?
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.reserved0 db 12 dup(?)
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.drv_num db ?
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.reserved1 db ?
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.boot_sig db ?
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.volume_id dd ?
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.volume_label db 11 dup(?)
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.filsys_type db 8 dup(?)
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.code db 420 dup(?)
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.signature dw ?
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}
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szVfsFatName db 'FATFS', 0
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vfs_fatfs:
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dd szVfsFatName
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dd 0
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dd vops_fatfs
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vops_fatfs:
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dd 0
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fatfs_init:
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mov eax, vfs_fatfs
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call vfs_register
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ret
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