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<TITLE>Int 13/AH=0Ah
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Int 13/AH=0Ah - HARD DISK - READ LONG SECTOR(S) (AT and later) -
AH = 0Ah
AL = number of sectors (01h may be only value supported)
CH = low eight bits of cylinder number
CL = sector number (bits 5-0)
high two bits of cylinder number (bits 7-6)
DH = head number
DL = drive number (80h = first, 81h = second)
ES:BX - data buffer
Return: CF clear if successful
CF set on error
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<h2>Int 13/AH=0Ah
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<h3><font color=#C00040>HARD DISK - READ LONG SECTOR(S) (AT and later)</font></h3>
<PRE>
AH = 0Ah
AL = number of sectors (01h may be only value supported)
CH = low eight bits of cylinder number
CL = sector number (bits 5-0)
high two bits of cylinder number (bits 7-6)
DH = head number
DL = drive number (80h = first, 81h = second)
ES:BX -> data buffer<br>
<p><b>Return:</b><br>CF clear if successful
CF set on error
AH = status <a href="rb-0606.htm#Table234" tppabs="http://www.ctyme.com/intr/rb-0606.htm#Table234">(see #00234)</a>
AL = number of sectors transferred
</PRE>
<p><b>Notes:</b>
This function reads in four to seven bytes of error-correcting code
along with each sector's worth of information.
Data errors are not automatically corrected, and the read is aborted
after the first sector with an ECC error.
Used for diagnostics only on PS/2 systems; IBM officially classifies
this function as optional
<p><b>BUG:</b>
On the original IBM AT BIOS (1984/01/10) this function does not disable
interrupts for harddisks (DL >= 80h). On these machines the MS-DOS/
PC DOS IO.SYS/IBMBIO.COM installs a special filter to bypass the
buggy code in the ROM (see CALL F000h:211Eh)
<p><b>See Also:</b>
<a href="rb-0607.htm" tppabs="http://www.ctyme.com/intr/rb-0607.htm">AH=02h</a> - <a href="rb-0626.htm" tppabs="http://www.ctyme.com/intr/rb-0626.htm">AH=0Bh</a> - MEM 0040h:0074h
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<b>Category: <a href="cat-003.htm" tppabs="http://www.ctyme.com/intr/cat-003.htm">
Bios</a>
- <a href="int-13.htm" tppabs="http://www.ctyme.com/intr/int-13.htm">
Int 13h</a>
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