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  <meta name="GENERATOR" content="Visual Page 1.0 for Windows">
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  <title>TI-92 Link Protocol Guide - File formats</title>
</head>
<body bgcolor="#ffffe8">
<p><b>TI-92 Link Protocol Guide</b> - File formats </p>
<center>
<h2>
<hr align="center">File Formats</h2>
</center>
<p>The TI-92 Graph Link software stores variables in several types of
files. Single variables are stored in files
that have an extension that corresponds with their type. Groups of
variables are stored in files with the extension
".92g" and backups with the extension ".92b". However, all of these
file types have a common
format.</p>
<p>The different file types and contents that the TI-92 Graph Link
software can read and write are shown below.
<table border="1" cellspacing="0" width="66%">
  <tbody>
    <tr>
      <th bgcolor="#dddddd" width="13%">Extension</th>
      <th bgcolor="#dddddd">Description</th>
    </tr>
    <tr>
      <td width="13%">
      <p align="center">.92a </p>
      </td>
      <td>TI-92 figure</td>
    </tr>
    <tr>
      <td width="13%">
      <p align="center">.92b </p>
      </td>
      <td>TI-92 system backup</td>
    </tr>
    <tr>
      <td width="13%">
      <p align="center">.92c </p>
      </td>
      <td>TI-92 data</td>
    </tr>
    <tr>
      <td width="13%">
      <p align="center">.92d </p>
      </td>
      <td>TI-92 GDB (Graphic Data Base)</td>
    </tr>
    <tr>
      <td width="13%">
      <p align="center">.92e </p>
      </td>
      <td>TI-92 expression</td>
    </tr>
    <tr>
      <td width="13%">
      <p align="center">.92f </p>
      </td>
      <td>TI-92 function</td>
    </tr>
    <tr>
      <td width="13%">
      <p align="center">.92g </p>
      </td>
      <td>Multiple TI-92 variables of varying types (group)</td>
    </tr>
    <tr>
      <td width="13%">
      <p align="center">.92i </p>
      </td>
      <td>TI-92 picture (image)</td>
    </tr>
    <tr>
      <td width="13%">
      <p align="center">.92l </p>
      </td>
      <td>TI-92 list</td>
    </tr>
    <tr>
      <td width="13%">
      <p align="center">.92m </p>
      </td>
      <td>TI-92 matrix</td>
    </tr>
    <tr>
      <td width="13%">
      <p align="center">.92p </p>
      </td>
      <td>TI-92 program</td>
    </tr>
    <tr>
      <td width="13%">
      <p align="center">.92s </p>
      </td>
      <td>TI-92 string</td>
    </tr>
    <tr>
      <td width="13%">
      <p align="center">.92t </p>
      </td>
      <td>TI-92 text</td>
    </tr>
    <tr>
      <td width="13%">
      <p align="center">.92x </p>
      </td>
      <td>TI-92 macro</td>
    </tr>
  </tbody>
</table>
</p>
<p></p>
<p>Early link programs for the TI-92 used an additional file type
".92@" because the TI-Graph Link 92
software had not been released for the PC. That format is described in
this section as well.</p>
<h3>
<hr align="center">The TI-92 variable file format</h3>
<p>The TI-92 variable file format has three parts: a header, a variable
table and a data section.</p>
<p>The header appears at the beginning of the file and takes the
following format: <br>
<i>Note - All 2-byte and 4-byte integers are stored little-endian
Intel-style (least significant byte first).</i>
<table border="1" cellspacing="0" width="92%">
  <tbody>
    <tr>
      <th bgcolor="#008800" width="8%"><font color="#ffffff">Offset</font></th>
      <th bgcolor="#008800" width="11%"><font color="#ffffff">Length</font></th>
      <th bgcolor="#008800" width="81%"><font color="#ffffff">Description</font></th>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">0</td>
      <td bgcolor="#ffffff" width="11%">8 bytes</td>
      <td bgcolor="#ffffff" width="81%">8-character signature. The
signature is always "<tt>**TI92**</tt>".</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">8</td>
      <td bgcolor="#ffffff" width="11%">2 bytes</td>
      <td bgcolor="#ffffff" width="81%">2-byte further signature. These
two bytes always contain {01h, 00h} = {1, 0}.</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">10 (Ah)</td>
      <td bgcolor="#ffffff" width="11%">8 bytes</td>
      <td bgcolor="#ffffff" width="81%">Default folder name (zero
terminated unless 8 characters long).</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">18 (12h)</td>
      <td bgcolor="#ffffff" width="11%">40&nbsp;(28h)&nbsp;bytes</td>
      <td bgcolor="#ffffff" width="81%">Comment. The comment is either
zero-terminated or padded on the right with space characters.</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">58 (3Ah)</td>
      <td bgcolor="#ffffff" width="11%">2 bytes</td>
      <td bgcolor="#ffffff" width="81%">Number of variable and folder
entries in the variable table.</td>
    </tr>
  </tbody>
</table>
<i>Note: If the first byte of the default folder name is 0, then the
default folder is the current folder on the
receiving unit.</i></p>
<p></p>
<p>The variable table comes immediately after the header and consists
of a number of 16-byte entries, each taking the format described below.
Folder entries share the same table. The variables described before the
first folder entry are assumed to be in the default folder. Variables
described after any given folder entry are placed in that folder. <br>
If no folder entries are included, then variables are considered to be
part of the folder named at file offset 0x0A. If this is null, then it
is considered to be in the current directory when a link program sends
it.</p>
<p>Each variable entry follows this format:
<table border="1" cellspacing="0" width="92%">
  <tbody>
    <tr>
      <th bgcolor="#008800" width="8%"><font color="#ffffff">Offset</font></th>
      <th bgcolor="#008800" width="11%"><font color="#ffffff">Length</font></th>
      <th bgcolor="#008800" width="81%"><font color="#ffffff">Description</font></th>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">0</td>
      <td bgcolor="#ffffff" width="11%">4 bytes</td>
      <td bgcolor="#ffffff" width="81%">Offset to the data for this
variable from the beginning of the file.</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">4</td>
      <td bgcolor="#ffffff" width="11%">8 bytes</td>
      <td bgcolor="#ffffff" width="81%">Name of variable (zero
terminated if not 8 characters long).</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">12 (Ch)</td>
      <td bgcolor="#ffffff" width="11%">1 byte</td>
      <td bgcolor="#ffffff" width="81%">Type ID of the variable.</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">13 (Dh)</td>
      <td bgcolor="#ffffff" width="11%">1 byte</td>
      <td bgcolor="#ffffff" width="81%">Attribute (0: none, 1: locked)</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">14 (Eh)</td>
      <td bgcolor="#ffffff" width="11%">2 bytes</td>
      <td bgcolor="#ffffff" width="81%">Unused - each byte has a value
of 0.</td>
    </tr>
  </tbody>
</table>
<br>
Folder entries follow this format:
<table border="1" cellspacing="0" width="92%">
  <tbody>
    <tr>
      <th bgcolor="#008800" width="8%"><font color="#ffffff">Offset</font></th>
      <th bgcolor="#008800" width="11%"><font color="#ffffff">Length</font></th>
      <th bgcolor="#008800" width="81%"><font color="#ffffff">Description</font></th>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">0</td>
      <td bgcolor="#ffffff" width="11%">4 bytes</td>
      <td bgcolor="#ffffff" width="81%">Offset to the data for the next
variable from the beginning of the file.</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">4</td>
      <td bgcolor="#ffffff" width="11%">8 bytes</td>
      <td bgcolor="#ffffff" width="81%">Name of variable (zero
terminated if not 8 characters long).</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">12 (Ch)</td>
      <td bgcolor="#ffffff" width="11%">1 byte</td>
      <td bgcolor="#ffffff" width="81%">Type ID of the variable. For
folders, this value is always 1Fh.</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">13 (Dh)</td>
      <td bgcolor="#ffffff" width="11%">1 byte</td>
      <td bgcolor="#ffffff" width="81%">Unused - this byte has a value
of 0.</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">14 (Eh)</td>
      <td bgcolor="#ffffff" width="11%">2 bytes</td>
      <td bgcolor="#ffffff" width="81%">The number of variables in this
folder.</td>
    </tr>
  </tbody>
</table>
<br>
Finally, the data section, which follows the variable table, has this
format:<br>
<table border="1" cellspacing="0" width="92%">
  <tbody>
    <tr>
      <th bgcolor="#008800" width="8%"><font color="#ffffff">Offset</font></th>
      <th bgcolor="#008800" width="11%"><font color="#ffffff">Length</font></th>
      <th bgcolor="#008800" width="81%"><font color="#ffffff">Description</font></th>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">0</td>
      <td bgcolor="#ffffff" width="11%">4 bytes</td>
      <td bgcolor="#ffffff" width="81%">The file size, in bytes.</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">4</td>
      <td bgcolor="#ffffff" width="11%">2 bytes</td>
      <td bgcolor="#ffffff" width="81%">A 2-byte signature. These two
bytes always contain {A5h, 5Ah}.</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">6</td>
      <td bgcolor="#ffffff" width="11%"><i>n</i> bytes</td>
      <td bgcolor="#ffffff" width="81%">Data section.</td>
    </tr>
  </tbody>
</table>
</p>
<p></p>
<p>The data section consists of several variable data parts
back-to-back, in order of their listing in the variable
table. Each variable part has this format:
<table border="1" cellspacing="0" width="92%">
  <tbody>
    <tr>
      <th bgcolor="#008800" width="8%"><font color="#ffffff">Offset</font></th>
      <th bgcolor="#008800" width="11%"><font color="#ffffff">Length</font></th>
      <th bgcolor="#008800" width="81%"><font color="#ffffff">Description</font></th>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">0</td>
      <td bgcolor="#ffffff" width="11%"><i>m</i> bytes</td>
      <td bgcolor="#ffffff" width="81%">The variable data. This field
includes all bytes transferred in data packets. The first four bytes
usually all have a value of 0.</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%"><i>m</i></td>
      <td bgcolor="#ffffff" width="11%">2 bytes</td>
      <td bgcolor="#ffffff" width="81%">Checksum. This is the lower 16
bits of the sum of all bytes in the first four bytes and the variable
data.</td>
    </tr>
  </tbody>
</table>
</p>
<p></p>
<h3>
<hr align="center">A simplification of the TI-92 file format for a
single variable</h3>
<p>Files containing single variables are a simple yet common example of
the TI-92 file format. In this special
case, the file format can be simplified as follows:
<table border="1" cellspacing="0" width="92%">
  <tbody>
    <tr>
      <th bgcolor="#008800" width="8%"><font color="#ffffff">Offset</font></th>
      <th bgcolor="#008800" width="11%"><font color="#ffffff">Length</font></th>
      <th bgcolor="#008800" width="81%"><font color="#ffffff">Description</font></th>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">0</td>
      <td bgcolor="#ffffff" width="11%">8 bytes</td>
      <td bgcolor="#ffffff" width="81%">8-character signature. The
signature is always "<tt>**TI92**</tt>".</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">8</td>
      <td bgcolor="#ffffff" width="11%">2 bytes</td>
      <td bgcolor="#ffffff" width="81%">2-byte further signature. These
two bytes always contain {01h, 00h} = {1, 0}.</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">10 (Ah)</td>
      <td bgcolor="#ffffff" width="11%">8 bytes</td>
      <td bgcolor="#ffffff" width="81%">The parent folder of the
variable (zero terminated if not 8 characters long) - <i>See note below</i>.</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">18 (12h)</td>
      <td bgcolor="#ffffff" width="11%">40 (28h) bytes</td>
      <td bgcolor="#ffffff" width="81%">Comment. The comment is either
zero-terminated or padded on the right with space characters.</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">58 (3Ah)</td>
      <td bgcolor="#ffffff" width="11%">6 bytes</td>
      <td bgcolor="#ffffff" width="81%">These 6 bytes always contain
{01h, 00h, 52h, 00h, 00h, 00h} = {1, 0, 82, 0, 0, 0}.</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">64 (40h)</td>
      <td bgcolor="#ffffff" width="11%">8 bytes</td>
      <td bgcolor="#ffffff" width="81%">The name of the variable (zero
terminated if not 8 characters long).</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">72 (48h)</td>
      <td bgcolor="#ffffff" width="11%">1 byte</td>
      <td bgcolor="#ffffff" width="81%">The type ID for this variable.</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">73 (49h)</td>
      <td bgcolor="#ffffff" width="11%">3 bytes</td>
      <td bgcolor="#ffffff" width="81%">These three bytes always have a
value of 0.</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">76 (4Ch)</td>
      <td bgcolor="#ffffff" width="11%">4 bytes</td>
      <td bgcolor="#ffffff" width="81%">The file size, in bytes.</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">80 (50h)</td>
      <td bgcolor="#ffffff" width="11%">2 bytes</td>
      <td bgcolor="#ffffff" width="81%">A 2-byte signature. These two
bytes always contain {A5h, 5Ah}.</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">82 (52h)</td>
      <td bgcolor="#ffffff" width="11%"><i>n</i> bytes</td>
      <td bgcolor="#ffffff" width="81%">The variable data. This field
includes all bytes transferred in data packets. The first four bytes
usually all have a value of 0.</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">82 (52h)+<i>n</i></td>
      <td bgcolor="#ffffff" width="11%">2 bytes</td>
      <td bgcolor="#ffffff" width="81%">Checksum. This is the lower 16
bits of the sum of all bytes in the variable data (@52h).</td>
    </tr>
  </tbody>
</table>
<i>Note: If the first byte of the name of the parent folder is 0, then
the variable is put into the current folder
on the receiving unit.</i>
</p>
<h3>
<hr align="center">The TI-92 backup file format</h3>
<p>The TI-92 backup file format is similar to the group file format,
but there are some functional differences.
Backup data cannot be stored in the same file as variable data, and
some of the bytes in a backup file have special
meanings. While the backup is sent in several sections, there is only
one variable entry for the backup.</p>
<p>TI-92 backup files follow this format:
<table border="1" cellspacing="0" width="92%">
  <tbody>
    <tr>
      <th bgcolor="#008800" width="8%"><font color="#ffffff">Offset</font></th>
      <th bgcolor="#008800" width="11%"><font color="#ffffff">Length</font></th>
      <th bgcolor="#008800" width="81%"><font color="#ffffff">Description</font></th>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">0</td>
      <td bgcolor="#ffffff" width="11%">8 bytes</td>
      <td bgcolor="#ffffff" width="81%">8-character signature. The
signature is always "<tt>**TI92**</tt>".</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">8</td>
      <td bgcolor="#ffffff" width="11%">2 bytes</td>
      <td bgcolor="#ffffff" width="81%">2-byte further signature. These
two bytes always contain {01h, 00h} = {1, 0}.</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">10 (Ah)</td>
      <td bgcolor="#ffffff" width="11%">8 bytes</td>
      <td bgcolor="#ffffff" width="81%">The first byte always has a
value of 0; the other seven can have any value.</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">18 (12h)</td>
      <td bgcolor="#ffffff" width="11%">40 (28h) bytes</td>
      <td bgcolor="#ffffff" width="81%">Comment. The comment is either
zero-terminated or padded on the right with space characters.</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">58 (3Ah)</td>
      <td bgcolor="#ffffff" width="11%">2 bytes</td>
      <td bgcolor="#ffffff" width="81%">These 2 bytes always contain
{01h, 00h}.</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">60 (3Ch)</td>
      <td bgcolor="#ffffff" width="11%">4 bytes</td>
      <td bgcolor="#ffffff" width="81%">These 4bytes always contain
{52h, 00h, 00h, 00h} = {82, 0, 0, 0}.</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">64 (40h)</td>
      <td bgcolor="#ffffff" width="11%">8 bytes</td>
      <td bgcolor="#ffffff" width="81%">A string which contains the ROM
version of the calculator (zero-terminated). Examples: "1.11", "2.1"</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">72 (48h)</td>
      <td bgcolor="#ffffff" width="11%">1 byte</td>
      <td bgcolor="#ffffff" width="81%">This byte always contains 1Dh.</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">73 (49h)</td>
      <td bgcolor="#ffffff" width="11%">3 bytes</td>
      <td bgcolor="#ffffff" width="81%">These three bytes always have a
value of 0.</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">76 (4Ch)</td>
      <td bgcolor="#ffffff" width="11%">4 bytes</td>
      <td bgcolor="#ffffff" width="81%">The file size, in bytes.</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">80 (50h)</td>
      <td bgcolor="#ffffff" width="11%">2 bytes</td>
      <td bgcolor="#ffffff" width="81%">A 2-byte further signature.
These two bytes always contain {A5h, 5Ah}.</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">82 (52h)</td>
      <td bgcolor="#ffffff" width="11%"><i>n</i> bytes</td>
      <td bgcolor="#ffffff" width="81%">Raw data, made up of the
1-kilobyte blocks stored back-to-back in order of transmission. These
blocks do <b>not</b> include the first four bytes of each of the data
packets.</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">82 (52h)+<i>n</i></td>
      <td bgcolor="#ffffff" width="11%">2 bytes</td>
      <td bgcolor="#ffffff" width="81%">File checksum. This is the
lower 16 bits of the sum of all bytes in the raw data (@52h).</td>
    </tr>
  </tbody>
</table>
</p>
<p></p>
<h3>
<hr align="center">The early 92@ file format</h3>
<p>Linking programs were available for the TI-92 before TI released the
TI-92 Graph Link for the PC. The creators
of Link92xp, one of these early TI-92 linking programs, designed this
file format to store the information. While
this format was never supported by TI and is now obsolete, there are
still some 92@ files floating about the internet.</p>
<p>92@ files start with a header with this format:<br>
<table border="1" cellspacing="0" width="92%">
  <tbody>
    <tr>
      <th bgcolor="#008800" width="8%"><font color="#ffffff">Offset</font></th>
      <th bgcolor="#008800" width="11%"><font color="#ffffff">Length</font></th>
      <th bgcolor="#008800" width="81%"><font color="#ffffff">Description</font></th>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">0</td>
      <td bgcolor="#ffffff" width="11%">8 bytes</td>
      <td bgcolor="#ffffff" width="81%">8-character signature. The
signature is always "<tt>**TI92**</tt>".</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">8</td>
      <td bgcolor="#ffffff" width="11%">3 bytes</td>
      <td bgcolor="#ffffff" width="81%">3-byte further signature. These
two bytes always contain {1Ah, 0Ch, 00h} = {26, 12, 0}.</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">11 (Bh)</td>
      <td bgcolor="#ffffff" width="11%">42 (2Ah) bytes</td>
      <td bgcolor="#ffffff" width="81%">Comment. The comment is either
zero-terminated or padded on the right with space characters.</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">53 (35h)</td>
      <td bgcolor="#ffffff" width="11%">2 bytes</td>
      <td bgcolor="#ffffff" width="81%">Length, in bytes, of the data
section and the checksum (<i>n</i>+2). This value should be 37h less
than the file length.</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">55 (37h)</td>
      <td bgcolor="#ffffff" width="11%"><i>n</i> bytes</td>
      <td bgcolor="#ffffff" width="81%">Data section - made up of a
number of entries, described below.</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">54 (36h)+<i>n</i></td>
      <td bgcolor="#ffffff" width="11%">2 bytes</td>
      <td bgcolor="#ffffff" width="81%">File checksum. This is the
lower 16 bits of the sum of all bytes in the data section.</td>
    </tr>
  </tbody>
</table>
</p>
<p></p>
<p>Each variable entry in the data section has this format:<br>
<table border="1" cellspacing="0" width="92%">
  <tbody>
    <tr>
      <th bgcolor="#008800" width="8%"><font color="#ffffff">Offset</font></th>
      <th bgcolor="#008800" width="11%"><font color="#ffffff">Length</font></th>
      <th bgcolor="#008800" width="81%"><font color="#ffffff">Description</font></th>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">0</td>
      <td bgcolor="#ffffff" width="11%">1 byte</td>
      <td bgcolor="#ffffff" width="81%">Offset from the next byte to
the data length field. This number should be 4+<i>m</i>, where <i>m</i>
is defined below.</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">1</td>
      <td bgcolor="#ffffff" width="11%">2 bytes</td>
      <td bgcolor="#ffffff" width="81%">Offset from the beginning of
the entry to the raw data. This number should be 3 more than the value
at offset 0.</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">3</td>
      <td bgcolor="#ffffff" width="11%">1 byte</td>
      <td bgcolor="#ffffff" width="81%">Variable type ID.</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">4</td>
      <td bgcolor="#ffffff" width="11%">1 byte</td>
      <td bgcolor="#ffffff" width="81%">Length, in characters, of the
variable directory/name field.</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">5</td>
      <td bgcolor="#ffffff" width="11%"><i>m</i> bytes</td>
      <td bgcolor="#ffffff" width="81%">Variable directory/name. If a
directory is specified, its name comes first, followed by a backslash
(\) character, then the variable name. If no directory is specified,
there is no backslash and the variable is put in the current directory
of the calculator.</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">5+<i>m</i></td>
      <td bgcolor="#ffffff" width="11%">2 bytes</td>
      <td bgcolor="#ffffff" width="81%">Length, in bytes, of the
variable data.</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">7+<i>m</i></td>
      <td bgcolor="#ffffff" width="11%"><i>n</i> bytes</td>
      <td bgcolor="#ffffff" width="81%">The variable data, not
including the first five bytes sent with the data packet. The first
four bytes of the packet are unimportant, and the fifth byte of the
packet can be calculated by subtracting 2 from the value at offset <i>5+m</i>
and taking the upper 8 bits.</td>
    </tr>
  </tbody>
</table>
</p>
<p></p>
<p>
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 border="2" height="32" width="32"></a> <br>
      <a href="vars.html">Variable Formats</a> </p>
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<hr align="center"><i>Site maintained by Romain Li&eacute;vin (</i><a
 href="mailto:roms@lpg.ticalc.org"><i>roms@lpg.ticalc.org</i></a><i>)
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