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<TITLE>Int 2F/AX=1510h
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Int 2F/AX=1510h - CD-ROM v2.10+ - SEND DEVICE DRIVER REQUEST -
AX = 1510h
CX = CD-ROM drive letter (0 = A, 1 = B, etc)
ES:BX - CD-ROM device driver request header (see #02597 at AX=0802h)
Return: CF clear if device driver has been called (check the request header's
status word to determine whether an error has occurred)
ES:BX request header updated
CF set if device driver has not been called
AX = error code (000Fh = invalid drive, 0001h = invalid function)
ES:BX request header unchanged
Notes: MSCDEX initializes the device driver request header's subunit field
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<h2>Int 2F/AX=1510h
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<h3><font color=#C00040>CD-ROM v2.10+ - SEND DEVICE DRIVER REQUEST</font></h3>
<PRE>
AX = 1510h
CX = CD-ROM drive letter (0 = A, 1 = B, etc)
ES:BX -> CD-ROM device driver request header <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 #02597 at AX=0802h)<br>
<p><b>Return:</b><br>CF clear if device driver has been called (check the request header's
status word to determine whether an error has occurred)
ES:BX request header updated
CF set if device driver has not been called
AX = error code (000Fh = invalid drive, 0001h = invalid function)
ES:BX request header unchanged
</PRE>
<p><b>Notes:</b>
MSCDEX initializes the device driver request header's subunit field
based on the drive number specified in CX.
MSCDEX v2.21 through v2.25 (at least) return error code AX=0001h if
nested calls are attempted
<p><b>BUGS:</b>
Novell DOS 7 NWCDEX prior to the 12/13/94 update did not initialize
the subunit field.
Windows95 sets CF if CX isn't a CD-ROM drive but leaves CF unchanged
if the drive is in fact a CD-ROM
<p><b>See Also:</b>
<a href="rb-4282.htm" tppabs="http://www.ctyme.com/intr/rb-4282.htm">AX=0802h</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-2f-1.htm" tppabs="http://www.ctyme.com/intr/int-2F.htm">
Int 2Fh</a>
- <a href="alpha-c.htm" tppabs="http://www.ctyme.com/intr/alpha-c.htm">
C</a>
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