en:docs:dos:api:int21:1c

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en:docs:dos:api:int21:1c [2020/12/08 08:46] – created prokusheven:docs:dos:api:int21:1c [2024/05/02 02:41] (current) – prokushev
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 ===== Notes ===== ===== Notes =====
  
-  under DOS 1.x, DS:BX points at an actual copy of the FAT; later +under DOS 1.x, DS:BX points at an actual copy of the FAT; later versions return a pointer to a copy of the FAT's ID byte 
-          versions return a pointer to a copy of the FAT's ID byte + 
-        on a DBLSPACE drive, the total number of clusters is based on the +on a DBLSPACE drive, the total number of clusters is based on the estimated compression ratio 
-          estimated compression ratio + 
-        this function may not be properly supported on CD-ROMs and other +this function may not be properly supported on CD-ROMs and other installable file systems (use AX=4402h"CD-ROM" for CD-ROMs instead) 
-          installable file systems (use AX=4402h"CD-ROM" for CD-ROMs + 
-          instead) +BUG:    DOS 7.10 (Win95B/Win98) reportedly returns incorrect values in AL and DX for FAT12/FAT16 drives, even though it manages correct results for FAT32 drives (DOS windows are not affected, only real-mode DOS)
-BUG:    DOS 7.10 (Win95B/Win98) reportedly returns incorrect values in AL and +
-          DX for FAT12/FAT16 drives, even though it manages correct results +
-          for FAT32 drives (DOS windows are not affected, only real-mode +
-          DOS)+
  
                    
 ===== See also ===== ===== See also =====
  
-AH=1Bh,AH=36h+AH=[[en:docs:dos:api:int21:1b|1Bh]],AH=[[en:docs:dos:api:int21:36|36h]]
  
 ===== Note ===== ===== Note =====