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oldlinux-files/docs/interrupts/int-html/rb-2683.htm
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<HTML>
<HEAD>
<TITLE>Int 21/AH=27h
</TITLE>
<META NAME="Description" CONTENT="
Int 21/AH=27h - DOS 1+ - RANDOM BLOCK READ FROM FCB FILE -
AH = 27h
CX = number of records to read
DS:DX - opened FCB (see #01345)
Return: AL = status
00h successful, all records read
01h end of file, no data read
02h segment wrap in DTA, no data read
03h end of file, partial read
Disk Transfer Area filled with records read from file
CX = number of records read (return AL = 00h or 03h)
">
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<h2>Int 21/AH=27h
</h2>
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<img src="lup.gif" tppabs="http://graphics.ctyme.com/gif/lup.gif" border=0 alt=Prev></a>
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<img src="lhome.gif" tppabs="http://graphics.ctyme.com/gif/lhome.gif" border=0 alt=Ralf Brown Page></a>
<td><a href="int.htm" tppabs="http://www.ctyme.com/intr/int.htm">Interrups</a></td>
<td><a href="cat.htm" tppabs="http://www.ctyme.com/intr/cat.htm">Categories</a></td>
<td><a href="alpha.htm" tppabs="http://www.ctyme.com/intr/alpha.htm">Contents</a></td>
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<p><img src="rbline.gif" tppabs="http://graphics.ctyme.com/gif/rbline.gif" width="100%" alt="------"><p>
<h3><font color=#C00040>DOS 1+ - RANDOM BLOCK READ FROM FCB FILE</font></h3>
<PRE>
AH = 27h
CX = number of records to read
DS:DX -> opened FCB <a href="rb-2574.htm#Table1345" tppabs="http://www.ctyme.com/intr/rb-2574.htm#Table1345">(see #01345)</a><br>
<p><b>Return:</b><br>AL = status
00h successful, all records read
01h end of file, no data read
02h segment wrap in DTA, no data read
03h end of file, partial read
Disk Transfer Area filled with records read from file
CX = number of records read (return AL = 00h or 03h)
</PRE>
<p><b>Notes:</b>
Read begins at current file position as specified in FCB; the file
position is updated after reading.
Not supported by MS Windows 3.0 DOSX.EXE DOS extender
<p><b>See Also:</b>
<a href="rb-2598.htm" tppabs="http://www.ctyme.com/intr/rb-2598.htm">AH=21h</a> - <a href="rb-2684.htm" tppabs="http://www.ctyme.com/intr/rb-2684.htm">AH=28h</a> - <a href="rb-2783.htm" tppabs="http://www.ctyme.com/intr/rb-2783.htm">AH=3Fh"DOS"</a>
<p>
<b>Category: <a href="cat-010.htm" tppabs="http://www.ctyme.com/intr/cat-010.htm">
DOS Kernel</a>
- <a href="int-21.htm" tppabs="http://www.ctyme.com/intr/int-21.htm">
Int 21h</a>
- <a href="alpha-d.htm" tppabs="http://www.ctyme.com/intr/alpha-d.htm">
D</a>
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