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<TITLE>Int 13/AH=24h
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<META NAME="Description" CONTENT="
Int 13/AH=24h - HARD DISK - PS/1 and newer PS/2 - SET MULTIPLE MODE -
AH = 24h
AL = number of sectors per block (2,4,8,16)
DL = drive number (80h,81h)
Return: CF clear if successful
CF set onerror
AH = status (see #00234 at AH=01h)
Desc: specify how many sectors the controller should transfer as a group
between operation-complete interrupts when using the Read Multiple
and Write Multiple functions (AH=21h,AH=22h)
Notes: set the number of sectors to 0 to disable multiple-transfer mode
">
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<h2>Int 13/AH=24h
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<h3><font color=#C00040>HARD DISK - PS/1 and newer PS/2 - SET MULTIPLE MODE</font></h3>
<PRE>
AH = 24h
AL = number of sectors per block (2,4,8,16)
DL = drive number (80h,81h)<br>
<p><b>Return:</b><br>CF clear if successful
CF set onerror
AH = status <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 #00234 at AH=01h)
</PRE>
<p><b>Desc:</b>
Specify how many sectors the controller should transfer as a group
between operation-complete interrupts when using the Read Multiple
and Write Multiple functions (AH=21h,AH=22h)
<p><b>Notes:</b>
Set the number of sectors to 0 to disable multiple-transfer mode.
The maximum value for the block size depends on the fixed disk
drive type. The value is stored in byte 15h of the fixed disk
drive parameter table that is created by POST..
The byte at address 0040h:0074h is set to status of operation.
<p><b>See Also:</b>
<a href="rb-0669.htm" tppabs="http://www.ctyme.com/intr/rb-0669.htm">AH=21h"PS/1"</a> - <a href="rb-0669.htm" tppabs="http://www.ctyme.com/intr/rb-0669.htm">AH=22h"PS/1"</a> - <a href="rb-0669.htm" tppabs="http://www.ctyme.com/intr/rb-0669.htm">AH=23h"PS/1"</a> - <a href="rb-0669.htm" tppabs="http://www.ctyme.com/intr/rb-0669.htm">AH=25h"PS/1"</a>
<p>
<b>Category: <a href="cat-008.htm" tppabs="http://www.ctyme.com/intr/cat-008.htm">
Disk I/O Enhancements</a>
- <a href="int-13.htm" tppabs="http://www.ctyme.com/intr/int-13.htm">
Int 13h</a>
- <a href="alpha-h.htm" tppabs="http://www.ctyme.com/intr/alpha-h.htm">
H</a>
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