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🔧 把FAT12文件系统的参数属性单独提取出来

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fslongjin 2022-01-17 16:50:48 +08:00
parent c7cc246652
commit 84f3aaac70
1 changed files with 25 additions and 0 deletions
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bootloader/fat12.inc Normal file
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; === 这是FAT12文件系统的信息 ===
RootDirSectors equ 14 ;根目录占用的扇区数
SectorNumOfRootDirStart equ 19 ; 根目录的起始扇区号
SectorNumOfFAT1Start equ 1 ; FAT1表的起始扇区号 （因为前面有一个保留扇区（引导扇区））
SectorBalance equ 17 ;平衡文件/目录的起始簇号与数据区域的起始簇号的差值。
BS_OEMName db 'DragonOS'
BPB_BytesPerSec dw 512
BPB_SecPerClus db 1
BPB_RsvdSecCnt dw 1
BPB_NumFATs db 2
BPB_RootEntCnt dw 224
BPB_TotSec16 dw 2880
BPB_Media db 0xf0
BPB_FATSz16 dw 9
BPB_SecPerTrk dw 18
BPB_NumHeads dw 2
BPB_HiddSec dd 0
BPB_TotSec32 dd 0
BS_DrvNum db 0
BS_Reserved1 db 0
BS_BootSig db 0x29
BS_VolID dd 0
BS_VolLab db 'boot loader'
BS_FileSysType db 'FAT12 '