221 lines
13 KiB
HTML
221 lines
13 KiB
HTML
<HTML>
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<HEAD>
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<TITLE>Int 21/AX=6C00h
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</TITLE>
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<META NAME="Description" CONTENT="
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Int 21/AX=6C00h - DOS 4.0+ - EXTENDED OPEN/CREATE -
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AX = 6C00h
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BL = open mode as in AL for normal open (see also AH=3Dh)
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bit 7: inheritance
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bits 4-6: sharing mode
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bit 3 reserved
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bits 0-2: access mode
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100 read-only, do not modify file's last-access time (DOS 7.0)
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BH = flags
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bit 6 = auto commit on every write (see also AH=68h)
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bit 5 = return error rather than doing INT 24h
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">
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</HEAD>
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<BODY BGCOLOR="#FFD0A0">
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<center>
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<h2>Int 21/AX=6C00h
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</h2>
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</center><p>
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<table border=1 cellpadding=3 cellspacing=1>
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<td>
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<img src="lhome.gif" tppabs="http://graphics.ctyme.com/gif/lhome.gif" border=0 alt=Ralf Brown Page></a>
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<td><a href="int.htm" tppabs="http://www.ctyme.com/intr/int.htm">Interrups</a></td>
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<td><a href="cat.htm" tppabs="http://www.ctyme.com/intr/cat.htm">Categories</a></td>
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<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>
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<h3><font color=#C00040>DOS 4.0+ - EXTENDED OPEN/CREATE</font></h3>
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<PRE>
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AX = 6C00h
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BL = open mode as in AL for normal open (see also AH=3Dh)
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<p><b>bit 7:</b><br>Inheritance
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<p><b>bits 4-6:</b><br>Sharing mode
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bit 3 reserved
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<p><b>bits 0-2:</b><br>Access mode
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100 read-only, do not modify file's last-access time (DOS 7.0).
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BH = flags
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bit 6 = auto commit on every write (see also AH=68h)
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bit 5 = return error rather than doing INT 24h
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bit 4 = (FAT32) extended size (allow 4GB files instead of 2GB).
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CX = create attribute <a href="rb-3179.htm#Table1769" tppabs="http://www.ctyme.com/intr/rb-3179.htm#Table1769">(see #01769)</a>.
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DL = action if file exists/does not exist <a href="rb-3179.htm#Table1770" tppabs="http://www.ctyme.com/intr/rb-3179.htm#Table1770">(see #01770)</a>.
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DH = 00h (reserved).
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DS:SI -> ASCIZ file name<br>
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<p><b>Return:</b><br>CF set on error
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AX = error code <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 #01680 at AH=59h/BX=0000h)
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CF clear if successful
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AX = file handle
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CX = status <a href="rb-3179.htm#Table1768" tppabs="http://www.ctyme.com/intr/rb-3179.htm#Table1768">(see #01768)</a>
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</PRE>
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<p><b>Notes:</b>
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The PC LAN Program only supports existence actions (in DL) of 01h,
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10h with sharing=compatibility, and 12h.
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DR DOS reportedly does not support this function and does not return
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an "invalid function call" error when this function is used..
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The documented bits of BX are stored in the SFT when the file is opened
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<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 #01641,#01642)
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<p><b>BUG:</b>
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This function has bugs (at least in DOS 5.0 and 6.2) when used with
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drives handled via the network redirector (INT 2F/AX=112Eh):
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- CX (attribute) is not passed to the redirector if DL=11h,
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- CX does not return the status, it is returned unchanged because
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DOS does a PUSH CX/POP CX when calling the redirector.
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<p><b>See Also:</b>
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<a href="rb-2778.htm" tppabs="http://www.ctyme.com/intr/rb-2778.htm">AH=3Ch</a> - <a href="rb-2779.htm" tppabs="http://www.ctyme.com/intr/rb-2779.htm">AH=3Dh</a> - <a href="rb-3180.htm" tppabs="http://www.ctyme.com/intr/rb-3180.htm">AX=6C01h</a> - <a href="rb-3206.htm" tppabs="http://www.ctyme.com/intr/rb-3206.htm">AX=7160h/CL=00h</a
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<PRE>
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<p>
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<a name=table1768></a>
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(Table 01768)
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Values for extended open function status:
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01h file opened
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02h file created
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03h file replaced
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<p>
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Bitfields for file create attribute:
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<a name=table1769></a>
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Bit(s) Description (Table 01769)
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6-15 reserved
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5 archive
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4 reserved
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3 volume label
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2 system
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1 hidden
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0 readonly
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<p>
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Bitfields for action:
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<a name=table1770></a>
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Bit(s) Description (Table 01770)
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7-4 action if file does not exist.
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0000 fail.
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0001 create
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3-0 action if file exists.
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0000 fail.
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0001 open.
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0010 replace/open
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</PRE>
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<p>
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<b>Category: <a href="cat-010.htm" tppabs="http://www.ctyme.com/intr/cat-010.htm">
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DOS Kernel</a>
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- <a href="int-21.htm" tppabs="http://www.ctyme.com/intr/int-21.htm">
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Int 21h</a>
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- <a href="alpha-d.htm" tppabs="http://www.ctyme.com/intr/alpha-d.htm">
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D</a>
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</b><p><p><img src="rbline.gif" tppabs="http://graphics.ctyme.com/gif/rbline.gif" width="100%" alt="------"><p>
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<table border=1 cellpadding=3 cellspacing=1>
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<a href="rb-3178.htm" tppabs="http://www.ctyme.com/intr/rb-3178.htm">
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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>
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<td><a href="int.htm" tppabs="http://www.ctyme.com/intr/int.htm">Interrups</a></td>
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<td><a href="cat.htm" tppabs="http://www.ctyme.com/intr/cat.htm">Categories</a></td>
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<td><a href="alpha.htm" tppabs="http://www.ctyme.com/intr/alpha.htm">Contents</a></td>
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</td></table><p>
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<FORM ACTION="https://secure.paypal.com/cgi-bin/webscr" tppabs="https://secure.paypal.com/cgi-bin/webscr" METHOD="POST" traget="_blank">
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<INPUT TYPE="hidden" NAME="cmd" VALUE="_xclick">
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<INPUT TYPE="hidden" NAME="business" VALUE="marc@perkel.com">
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<INPUT TYPE="hidden" NAME="return" VALUE="http://www.perkel.com">
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<INPUT TYPE="hidden" NAME="item_name" VALUE="Donation To Support this Site">
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<INPUT TYPE="hidden" NAME="no_intl" VALUE="1">
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<INPUT TYPE="image" SRC="x-click-but7.gif" tppabs="http://images.paypal.com/images/x-click-but7.gif" vspace=9
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NAME="submit" ALT="Make payments with PayPal - it's fast, free and secure!">
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</center>
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<FORM ACTION="http://service.bfast.com/bfast/click" target="_blank">
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<INPUT TYPE="hidden" NAME="siteid" VALUE="30472466" >
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<INPUT TYPE="hidden" NAME="bfpage" VALUE="horizontal">
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<INPUT TYPE="hidden" NAME="bfmid" VALUE="27253343" >
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<INPUT TYPE="hidden" NAME="num" VALUE="30">
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