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<TITLE>Int 21/AH=1Fh
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Int 21/AH=1Fh - DOS 1+ - GET DRIVE PARAMETER BLOCK FOR DEFAULT DRIVE -
AH = 1Fh
Return: AL = status
00h successful
DS:BX - Drive Parameter Block (DPB) (see #01357 for DOS 1.x,
AH=32h for DOS 2+)
FFh invalid drive
Note: this call was undocumented prior to the release of DOS 5.0; however,
only the DOS 4.0+ version of the DPB has been documented
SeeAlso: AH=32h,AX=7302h
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<h2>Int 21/AH=1Fh
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<h3><font color=#C00040>DOS 1+ - GET DRIVE PARAMETER BLOCK FOR DEFAULT DRIVE</font></h3>
<PRE>
AH = 1Fh<br>
<p><b>Return:</b><br>AL = status
00h successful
DS:BX -> Drive Parameter Block (DPB) <a href="javascript:if(confirm('http://www.ctyme.com/intr/rb-0000.htm \n\nThis file was not retrieved by Teleport Pro, because it was unavailable, or its retrieval was aborted, or the project was stopped too soon. \n\nDo you want to open it from the server?'))window.location='http://www.ctyme.com/intr/rb-0000.htm#Table0'" tppabs="http://www.ctyme.com/intr/rb-0000.htm#Table0"></a>(see #01357 for DOS 1.x,
AH=32h for DOS 2+)
FFh invalid drive
</PRE>
<p><b>Note:</b>
This call was undocumented prior to the release of DOS 5.0; however,
only the DOS 4.0+ version of the DPB has been documented
<p><b>See Also:</b>
<a href="rb-2724.htm" tppabs="http://www.ctyme.com/intr/rb-2724.htm">AH=32h</a> - <a href="rb-3226.htm" tppabs="http://www.ctyme.com/intr/rb-3226.htm">AX=7302h</a>
<PRE>
<p>
Format of DOS 1.1 and MS-DOS 1.25 drive parameter block:
<a name=table1357></a>
Offset Size Description (Table 01357)
00h BYTE sequential device ID
01h BYTE logical drive number (0=A:)
02h WORD bytes per sector
04h BYTE highest sector number within a cluster
05h BYTE shift count to convert clusters into sectors
06h WORD starting sector number of first FAT
08h BYTE number of copies of FAT
09h WORD number of directory entries
0Bh WORD number of first data sector
0Dh WORD highest cluster number (number of data clusters + 1)
0Fh BYTE sectors per FAT
10h WORD starting sector of directory
12h WORD address of allocation table
</PRE>
<p><b>Note:</b>
The DOS 1.0 table is the same except that the first and last fields
are missing; see INT 21/AH=32h for the DOS 2+ version
<p><b>See Also:</b>
#01395 - #04039
<p>
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