206 lines
12 KiB
HTML
206 lines
12 KiB
HTML
<HTML>
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<HEAD>
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<TITLE>Int 21/AX=4404h
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</TITLE>
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<META NAME="Description" CONTENT="
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Int 21/AX=4404h - DUBLDISK.SYS v2.6 - GET INFO -
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AX = 4404h
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BL = drive number of DoubleDisk drive (00h = default, 01h = A:, etc.)
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CX = number of bytes (000Ah-0014h, call ignored otherwise)
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DS:DX - data record (see #01530)
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Return: CF clear if successful
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AX = number of bytes read
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CF set on error
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AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
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Program: DUBLDISK.SYS is the device driver portion of DoubleDisk, a disk
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expander by Vertisoft Systems, Inc.
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">
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<META NAME="robots" CONTENT="none">
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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=4404h
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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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<a href="rb-2873.htm" tppabs="http://www.ctyme.com/intr/rb-2873.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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<a href="rb-2875.htm" tppabs="http://www.ctyme.com/intr/rb-2875.htm">
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<img src="ldown.gif" tppabs="http://graphics.ctyme.com/gif/ldown.gif" border=0 alt=Next></a>
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<a href="javascript:if(confirm('http://www.ctyme.com/rbrown.htm \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?'))window.location='http://www.ctyme.com/rbrown.htm'" tppabs="http://www.ctyme.com/rbrown.htm">
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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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<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>DUBLDISK.SYS v2.6 - GET INFO</font></h3>
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<PRE>
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AX = 4404h
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BL = drive number of DoubleDisk drive (00h = default, 01h = A:, etc.)
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CX = number of bytes (000Ah-0014h, call ignored otherwise)
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DS:DX -> data record <a href="rb-2874.htm#Table1530" tppabs="http://www.ctyme.com/intr/rb-2874.htm#Table1530">(see #01530)</a><br>
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<p><b>Return:</b><br>CF clear if successful
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AX = number of bytes read
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CF set on error
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AX = error code (01h,05h,06h,0Dh) <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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</PRE>
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<p><b>Program:</b>
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DUBLDISK.SYS is the device driver portion of DoubleDisk, a disk
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expander by Vertisoft Systems, Inc.
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<PRE>
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<p><b>InstallCheck:</b><br>For v2.6, scan memory for the signature "FAT 2.6 byte:",
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which is immediately followed by a data table <a href="rb-2874.htm#Table1531" tppabs="http://www.ctyme.com/intr/rb-2874.htm#Table1531">(see #01531)</a>
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</PRE>
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<p><b>BUG:</b>
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VOPT (a disk optimizer by Golden Bow Software) assumes that any driver
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which returns the "correct" number of bytes when the first word of
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the buffer for the data record contains the signature value 4444h is
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DoubleDisk; a workaround is for the non-DoubleDisk driver to return
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no data if the signature is present
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<p><b>See Also:</b>
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<a href="rb-2896.htm" tppabs="http://www.ctyme.com/intr/rb-2896.htm">AX=440Dh"DOS 3.2+"</a>
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<PRE>
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<p><b>Index:</b><br>Installation check;DUBLDISK.SYS
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<p>
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Format of DUBLDISK data record:
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<a name=table1530></a>
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Offset Size Description (Table 01530)
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00h WORD (call) signature 4444h
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02h BYTE (call) function
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00h ???
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01h ???
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---function 00h---
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02h BYTE (ret) ???
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03h BYTE (ret) ???
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---function 01h---
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02h WORD (ret) 4444h
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04h WORD allocation unit size???
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06h WORD ???
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08h WORD ???
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0Ah BYTE ???
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<p>
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Format of DUBLDISK signature data table:
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<a name=table1531></a>
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Offset Size Description (Table 01531)
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00h 5 BYTEs ???
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05h BYTE first drive number
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06h BYTE number of drives
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07h ???
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</PRE>
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<p>
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<b>Category: <a href="cat-017.htm" tppabs="http://www.ctyme.com/intr/cat-017.htm">
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File/Disk Compression</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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<td>
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<a href="rb-2873.htm" tppabs="http://www.ctyme.com/intr/rb-2873.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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<a href="rb-2875.htm" tppabs="http://www.ctyme.com/intr/rb-2875.htm">
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<img src="ldown.gif" tppabs="http://graphics.ctyme.com/gif/ldown.gif" border=0 alt=Next></a>
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<a href="javascript:if(confirm('http://www.ctyme.com/rbrown.htm \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?'))window.location='http://www.ctyme.com/rbrown.htm'" tppabs="http://www.ctyme.com/rbrown.htm">
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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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<p><table border=1 bgcolor="#ffff99"><tr><td>
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<a href="javascript:if(confirm('http://www.ctyme.com/mail.htm \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?'))window.location='http://www.ctyme.com/mail.htm'" tppabs="http://www.ctyme.com/mail.htm">
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<img src="mail.gif" tppabs="http://graphics.ctyme.com/gif/mail.gif" ALT="email" height="40" width="40"></a>
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<a href="javascript:if(confirm('http://www.ctyme.com/map.htm \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?'))window.location='http://www.ctyme.com/map.htm'" tppabs="http://www.ctyme.com/map.htm">
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<br><a href="javascript:if(confirm('http://www.ctyme.com/map.htm \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?'))window.location='http://www.ctyme.com/map.htm'" tppabs="http://www.ctyme.com/map.htm">Index</a>
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</td><td width="65">
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<a href="javascript:if(confirm('http://www.ctyme.com/ \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?'))window.location='http://www.ctyme.com/'" tppabs="http://www.ctyme.com/">
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<img src="home.gif" tppabs="http://graphics.ctyme.com/gif/home.gif" ALT="Home" height="40" width="40"></a>
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<br><a href="javascript:if(confirm('http://www.ctyme.com/ \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?'))window.location='http://www.ctyme.com/'" tppabs="http://www.ctyme.com/">Home</a>
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</td><td width="90">
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<center>
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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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</FORM>
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</td></tr></table></td></tr></table><p>
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<center>
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<p>
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<a href="javascript:if(confirm('http://www.ctyme.com/hosting/index.htm \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?'))window.location='http://www.ctyme.com/hosting/index.htm'" tppabs="http://www.ctyme.com/hosting/index.htm" target="_blank">
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<img src="ctymehost.gif" tppabs="http://graphics.ctyme.com/gif/ctymehost.gif"
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border=3 height=60 width=468></a>
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<p>
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<!-- Ad End --->
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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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<table bgcolor=white border=3><tr><td>
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<table bgcolor=white border=0>
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<tr><td>
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<IMG SRC="serve-bfmid=27253343&siteid=30472466&bfpage=horizontal.gif" tppabs="http://service.bfast.com/bfast/serve?bfmid=27253343&siteid=30472466&bfpage=horizontal" BORDER="0" WIDTH="1" HEIGHT="1" align=right NOSAVE >
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<center><b>Search the web with Google</b></center>
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</td></tr><tr><td>
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<TABLE cellpadding=0 cellspacing=5 bgcolor="#FFFFFF">
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<tr><td bgcolor="#0000cc"><IMG SRC="cleardot.gif" tppabs="http://www.google.com/images/cleardot.gif" height=1 border="0" ALT="Google"></td></tr><tr><td>
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<IMG SRC="affiliate_logo.gif" tppabs="http://www.google.com/affiliates/affiliate_logo.gif" border="0" ALT="Google" align="center">
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<INPUT TYPE=text name=q size=30 maxlength=255 value="">
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<INPUT type=submit name=sa VALUE="Go">
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<tr><td bgcolor="#0000cc"><IMG SRC="cleardot.gif" tppabs="http://www.google.com/images/cleardot.gif" height=1 border="0" ALT="Google"></td></tr></TABLE>
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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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