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tibasicc


			
				
					
						
						
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							<!DOCTYPE doctype PUBLIC "-//w3c//dtd html 4.0 transitional//en">
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  <title>TI-89 Link Protocol Guide - File formats</title>
</head>
<body bgcolor="#ffffe8">
<b>TI-89 Link Protocol Guide</b> - File formats
<center>
<h2>
<hr align="center">File Formats</h2>
</center>
The TI-89 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 ".89g" and backups with the extension ".89g" also.
However, all of these file
types have a common format apart from FLASH files. <br>
Note: TI89/92/92+ have the same common file format.
<p>The different file types and contents that the TI-89 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" width="13%">Extension</th>
      <th bgcolor="#dddddd" width="13%">Extension</th>
      <th bgcolor="#dddddd">Description</th>
    </tr>
    <tr>
      <td width="13%">
      <center> .89a&nbsp; </center>
      </td>
      <td width="13%">
      <center> .9xa&nbsp; </center>
      </td>
      <td width="13%">
      <center> .v2a&nbsp; </center>
      </td>
      <td>TI-89 figure</td>
    </tr>
    <tr>
      <td width="13%">
      <center> .89g&nbsp; </center>
      </td>
      <td width="13%">
      <center> .89g&nbsp; </center>
      </td>
      <td width="13%">
      <center> .89g&nbsp; </center>
      </td>
      <td>TI-89 system backup</td>
    </tr>
    <tr>
      <td width="13%">
      <center> .89c&nbsp; </center>
      </td>
      <td width="13%">
      <center> .89c&nbsp; </center>
      </td>
      <td width="13%">
      <center> .89c&nbsp; </center>
      </td>
      <td>TI-89 data</td>
    </tr>
    <tr>
      <td width="13%">
      <center> .89d&nbsp; </center>
      </td>
      <td width="13%">
      <center> .89d&nbsp; </center>
      </td>
      <td width="13%">
      <center> .89d&nbsp; </center>
      </td>
      <td>TI-89 GDB (Graphic Data Base)</td>
    </tr>
    <tr>
      <td width="13%">
      <center> .89e&nbsp; </center>
      </td>
      <td width="13%">
      <center> .89e&nbsp; </center>
      </td>
      <td width="13%">
      <center> .89e&nbsp; </center>
      </td>
      <td>TI-89 expression</td>
    </tr>
    <tr>
      <td width="13%">
      <center> .89f&nbsp; </center>
      </td>
      <td width="13%">
      <center> .89f&nbsp; </center>
      </td>
      <td width="13%">
      <center> .89f&nbsp; </center>
      </td>
      <td>TI-89 function</td>
    </tr>
    <tr>
      <td width="13%">
      <center> .89g&nbsp; </center>
      </td>
      <td width="13%">
      <center> .89g&nbsp; </center>
      </td>
      <td width="13%">
      <center> .89g&nbsp; </center>
      </td>
      <td>Multiple TI-89 variables of varying types (group)</td>
    </tr>
    <tr>
      <td width="13%">
      <center> .89i&nbsp; </center>
      </td>
      <td width="13%">
      <center> .89i&nbsp; </center>
      </td>
      <td width="13%">
      <center> .89i&nbsp; </center>
      </td>
      <td>TI-89 picture (image)</td>
    </tr>
    <tr>
      <td width="13%">
      <center> .89k </center>
      </td>
      <td width="13%">
      <center> .89k </center>
      </td>
      <td width="13%">
      <center> .89k </center>
      </td>
      <td>TI-89 FLASH application</td>
    </tr>
    <tr>
      <td width="13%">
      <center> .89l&nbsp; </center>
      </td>
      <td width="13%">
      <center> .89l&nbsp; </center>
      </td>
      <td width="13%">
      <center> .89l&nbsp; </center>
      </td>
      <td>TI-89 list</td>
    </tr>
    <tr>
      <td width="13%">
      <center> .89m&nbsp; </center>
      </td>
      <td width="13%">
      <center> .89m&nbsp; </center>
      </td>
      <td width="13%">
      <center> .89m&nbsp; </center>
      </td>
      <td>TI-89 matrix</td>
    </tr>
    <tr>
      <td width="13%">
      <center> .89p&nbsp; </center>
      </td>
      <td width="13%">
      <center> .89p&nbsp; </center>
      </td>
      <td width="13%">
      <center> .89p&nbsp; </center>
      </td>
      <td>TI-89 program</td>
    </tr>
    <tr>
      <td width="13%">
      <center> .89s&nbsp; </center>
      </td>
      <td width="13%">
      <center> .89s&nbsp; </center>
      </td>
      <td width="13%">
      <center> .89s&nbsp; </center>
      </td>
      <td>TI-89 string</td>
    </tr>
    <tr>
      <td width="13%">
      <center> .89t&nbsp; </center>
      </td>
      <td width="13%">
      <center> .89t&nbsp; </center>
      </td>
      <td width="13%">
      <center> .89t&nbsp; </center>
      </td>
      <td>TI-89 text</td>
    </tr>
    <tr>
      <td width="13%">
      <center> .89u </center>
      </td>
      <td width="13%">
      <center> .89u </center>
      </td>
      <td width="13%">
      <center> .89u </center>
      </td>
      <td>TI-89 Operating System (AMS)</td>
    </tr>
    <tr>
      <td width="13%">
      <center> .89x&nbsp; </center>
      </td>
      <td width="13%">
      <center> .89x&nbsp; </center>
      </td>
      <td width="13%">
      <center> .89x&nbsp; </center>
      </td>
      <td>TI-89 macro</td>
    </tr>
    <tr>
      <td width="13%">
      <center> .89z </center>
      </td>
      <td width="13%">
      <center> .89z </center>
      </td>
      <td width="13%">
      <center> .89z </center>
      </td>
      <td>TI89 assembly program</td>
    </tr>
  </tbody>
</table>
<br>
&nbsp; </p>
<h3>
<hr align="center">The TI-89 variable file format</h3>
The TI-89 variable file format has three parts: a header, a variable
table and a data section.
<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>**TI89**</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 (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%">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>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.<br>
<br>
</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,
2:
archived)</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>
</p>
<p>Finally, the data section, which follows the variable table, 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%">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>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 five 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>
<h3>
<hr align="center">A simplification of the TI-89 file format for a
single variable</h3>
Files containing single variables are a simple yet common example of
the TI-89 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>**TI89**</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.</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>
<h3>
<hr align="center">The TI-89 backup file format</h3>
The TI-89 does not have a true backup capability. Indeed, a backup file
is
simply a group file and have the .89g file extension. <br>
Nethertheless, backup files get with the TIGL software does not keep
the
attribute of the variable (locked or archived). So, if a backup with
previously
archived variables is sent to the calc, the variables will not be
archived
and a 'Not enough memory' may occur ! <br>
But, TiLP supports a slightly modified .89g file format which allow to
keep
this attribute. This enhanced group file format is 100% fully
compatible with
the TIGL software.
<p>The only modification (<i>in italic</i>) has been made on the
variable entry format: <br>
&nbsp;
<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 bytes</td>
      <td bgcolor="#ffffff" width="81%"><i>Attribute: 1Dh (none), 26h
(locked) or 27h (archived)</i>&nbsp;</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>
</p>
<h3>
<hr align="center">The TI-89 FLASH file format</h3>
A FLASH file usually contains between 1 and 3 headers with data and the
header has
the same format than the TI83+ one.<br>
Headers can contain : license or data (app/os/certificate).<br>
<p>The header 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 style="width: 92%;" border="1" cellspacing="0">
  <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>**TIFL**</tt>".</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">8</td>
      <td bgcolor="#ffffff" width="11%">2 bytes</td>
      <td bgcolor="#ffffff" width="81%">Revision number (BCD coded):
major.minor.</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">9</td>
      <td bgcolor="#ffffff" width="11%">1 byte</td>
      <td bgcolor="#ffffff" width="81%">Flags (usually set to 00h).</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">10 (Ah)</td>
      <td bgcolor="#ffffff" width="11%">1 byte</td>
      <td bgcolor="#ffffff" width="81%">Object type (00h).</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">12 (Ch)</td>
      <td bgcolor="#ffffff" width="11%">4 bytes</td>
      <td bgcolor="#ffffff" width="81%">Binary-Coded-Decimal date such
as
{dd, mm, yy, yy} for 'dd/mm/yyyy'.</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">16 (10h)</td>
      <td bgcolor="#ffffff" width="11%">1 bytes</td>
      <td bgcolor="#ffffff" width="81%">Name length</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">17 (11h)</td>
      <td bgcolor="#ffffff" width="11%">8 bytes</td>
      <td bgcolor="#ffffff" width="81%">Application name or 'basecode'
for
OS or '' for certificate. Name is null-terminated unless 8 characters
long.</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">25 (19h)</td>
      <td bgcolor="#ffffff" width="11%">23 bytes</td>
      <td bgcolor="#ffffff" width="81%">Filler (unused, set to 00h).</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">48 (30h)</td>
      <td bgcolor="#ffffff" width="11%">1 byte</td>
      <td bgcolor="#ffffff" width="81%">Device type (TI73: 74h, TI83+:
73h,
TI89: 98h, TI92+: 88h)</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">49 (31h)</td>
      <td bgcolor="#ffffff" width="11%">1 byte</td>
      <td bgcolor="#ffffff" width="81%">Data type (os: 23h,
application: 24h,
certificate: 25h, license: 3Eh)</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">50 (32H)</td>
      <td bgcolor="#ffffff" width="11%">22 bytes</td>
      <td bgcolor="#ffffff" width="81%">Filler (unused, set to 00h).</td>
    </tr>
    <tr>
      <td
 style="vertical-align: top; background-color: rgb(255, 255, 255);">72
(48h)<br>
      </td>
      <td
 style="vertical-align: top; background-color: rgb(255, 255, 255);">2
bytes<br>
      </td>
      <td
 style="background-color: rgb(255, 255, 255); vertical-align: top;">Hardware
ID (1 = 92+, 3 = 89, 8
= V200, 9 = Titanium); see TIGCC doc.</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">74 (4Ah)</td>
      <td bgcolor="#ffffff" width="11%">4 bytes</td>
      <td style="width: 81%; background-color: rgb(255, 255, 255);">Size
of data in bytes</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">78 (4Eh)</td>
      <td bgcolor="#ffffff" width="11%"><i>n</i> bytes</td>
      <td bgcolor="#ffffff" width="81%">Data.</td>
    </tr>
    <tr>
      <td bgcolor="#ffffff" width="8%">78 (4Eh)+<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.</td>
    </tr>
  </tbody>
</table>
</p>
<p>The data section contains pure raw data which are directly sent to
the
calculator.</p>
<p>There is an old format, called <a href="TibFormat.txt">TIB</a> but
still used by developers. Its format is below: The document comes from
PedRom sources and is copyrighted as GPL by <a
 href="http://www.timetoteam.fr.st">Patrick Pelissier</a>.<br>
<br>
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