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  1. <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
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  2. <HTML>
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  5. 	<META NAME="GENERATOR" Content="Visual Page 1.0 for Windows">
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  6. 	<META HTTP-EQUIV="Content-Type" CONTENT="text/html;CHARSET=iso-8859-1">
    7. 

  7. 	<TITLE>TI-82 Link Protocol Guide - Backup Transfers</TITLE>
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  8. </HEAD>
    9. 

  9. 

  10. <BODY BGCOLOR="#FFFFE8">
    11. 

  11. 

  12. <P><B>TI-82 Link Protocol Guide v1.0</B> - System Backup Transfers</P>
    13. 

  13. <CENTER>
    14. 

  14. <H2>
    15. 

  15. <HR ALIGN="CENTER">
    16. 

  16. System Backup Transfers</H2>
    17. 

  17. </CENTER>
    18. 

  18. <P>A System Backup is one large transmission containing all user-modifiable data in the calculator. The file format
    19. 

  19. that the TI-82 Graph Link software uses can be found in the <A HREF="fformat.html#backup">file formats</A>
    20. 

  20. section of this documentation.</P>
    21. 

  21. <P>The protocol for all system backup transfers is shown below. For information on packet formats, <A HREF="packet.html">click
    22. 

  22. here</A>.</P>
    23. 

  23. <P>A computer can be either the sending unit or the receiving unit.</P>
    24. 

  24. <P>
    25. 

  25. <TABLE BORDER="1" CELLSPACING="0" WIDTH="92%" BGCOLOR="#FFFFFF">
    26. 

  26. 	<TR>
    27. 

  27. 		<TH WIDTH="7%" BGCOLOR="#008800"><FONT COLOR="#FFFFFF">Step</FONT></TH>
    28. 

  28. 		<TH COLSPAN="3" BGCOLOR="#008800"><FONT COLOR="#FFFFFF">Direction</FONT></TH>
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  29. 		<TH WIDTH="80%" BGCOLOR="#008800"><FONT COLOR="#FFFFFF">Packet</FONT></TH>
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  30. 	</TR>
    31. 

  31. 	<TR>
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  32. 		<TD WIDTH="7%" BGCOLOR="#FFFFFF">
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  33. 			<P ALIGN="CENTER">1
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  34. 		</TD>
    35. 

  35. 		<TD ROWSPAN="10">
    36. 

  36. 			<P ALIGN="CENTER"><IMG SRC="graphics/calc.gif" WIDTH="30" HEIGHT="67" ALIGN="BOTTOM" ALT="Sending Unit" BORDER="0">
    37. 

  37. 		</TD>
    38. 

  38. 		<TD WIDTH="6%" BGCOLOR="#FFFFFF">
    39. 

  39. 			<P ALIGN="CENTER"><IMG SRC="graphics/right.gif" WIDTH="22" HEIGHT="13" ALIGN="BOTTOM" ALT="===>" BORDER="0">
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  40. 		</TD>
    41. 

  41. 		<TD ROWSPAN="10">
    42. 

  42. 			<P ALIGN="CENTER"><IMG SRC="graphics/calc.gif" WIDTH="30" HEIGHT="67" ALIGN="BOTTOM" ALT="Receiving Unit" BORDER="0">
    43. 

  43. 		</TD>
    44. 

  44. 		<TD WIDTH="80%" BGCOLOR="#FFFFFF">VAR with <A HREF="packet.html#backup">backup-style header</A> and type ID = 0xF.</TD>
    45. 

  45. 	</TR>
    46. 

  46. 	<TR>
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  47. 		<TD WIDTH="7%" BGCOLOR="#FFFFFF">
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  48. 			<P ALIGN="CENTER">2
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  51. 			<P ALIGN="CENTER"><IMG SRC="graphics/left.gif" WIDTH="22" HEIGHT="13" ALIGN="BOTTOM" ALT="<===" BORDER="0">
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  52. 		</TD>
    53. 

  53. 		<TD WIDTH="80%" BGCOLOR="#FFFFFF">ACK</TD>
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  54. 	</TR>
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  55. 	<TR>
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  56. 		<TD WIDTH="7%" BGCOLOR="#FFFFFF">
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  57. 			<P ALIGN="CENTER">3
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  60. 			<P ALIGN="CENTER"><IMG SRC="graphics/left.gif" WIDTH="22" HEIGHT="13" ALIGN="BOTTOM" ALT="<===" BORDER="0">
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  61. 		</TD>
    62. 

  62. 		<TD WIDTH="80%" BGCOLOR="#FFFFFF">CTS or SKIP/EXIT. If exit, do step 4 and quit.</TD>
    63. 

  63. 	</TR>
    64. 

  64. 	<TR>
    65. 

  65. 		<TD WIDTH="7%" BGCOLOR="#FFFFFF">
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  66. 			<P ALIGN="CENTER">4
    67. 

  67. 		</TD>
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  68. 		<TD WIDTH="6%" BGCOLOR="#FFFFFF">
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  69. 			<P ALIGN="CENTER"><IMG SRC="graphics/right.gif" WIDTH="22" HEIGHT="13" ALIGN="BOTTOM" ALT="===>" BORDER="0">
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  70. 		</TD>
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  71. 		<TD WIDTH="80%" BGCOLOR="#FFFFFF">ACK</TD>
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  72. 	</TR>
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  79. 		</TD>
    80. 

  80. 		<TD WIDTH="80%">DATA - section 1 (system data)</TD>
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  81. 	</TR>
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  88. 		</TD>
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  89. 		<TD WIDTH="80%">ACK</TD>
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  97. 		</TD>
    98. 

  98. 		<TD WIDTH="80%">DATA - section 2 (user data)</TD>
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  99. 	</TR>
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  100. 	<TR>
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  105. 			<P ALIGN="CENTER"><IMG SRC="graphics/left.gif" WIDTH="22" HEIGHT="13" ALIGN="BOTTOM" ALT="<===" BORDER="0">
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  106. 		</TD>
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  107. 		<TD WIDTH="80%">ACK</TD>
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  108. 	</TR>
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  109. 	<TR>
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  111. 			<P ALIGN="CENTER">9
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  112. 		</TD>
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  114. 			<P ALIGN="CENTER"><IMG SRC="graphics/right.gif" WIDTH="22" HEIGHT="13" ALIGN="BOTTOM" ALT="===>" BORDER="0">
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  115. 		</TD>
    116. 

  116. 		<TD WIDTH="80%">DATA - section 3 (variable table?)</TD>
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  117. 	</TR>
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  118. 	<TR>
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  120. 			<P ALIGN="CENTER">10
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  121. 		</TD>
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  123. 			<P ALIGN="CENTER"><IMG SRC="graphics/left.gif" WIDTH="22" HEIGHT="13" ALIGN="BOTTOM" ALT="<===" BORDER="0">
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  124. 		</TD>
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  125. 		<TD WIDTH="80%">ACK</TD>
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  126. 	</TR>
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  127. </TABLE>
    128. 

  128. <p></P>
    129. 

  129. 

  130. <P><U>Example (PC sending backup to TI):</U><BR>
    131. 

  131. 

  132. <TABLE BORDER="0" CELLSPACING="0" WIDTH="100%">
    133. 

  133. 	<TR>
    134. 

  134. 		<TD BGCOLOR="#CCFFCC">PC:</TD>
    135. 

  135. 		<TD WIDTH="50%" BGCOLOR="#CCFFCC"><B><TT>02&nbsp;06&nbsp;09&nbsp;00&nbsp;</TT></B><TT>FC&nbsp;07&nbsp;0F&nbsp;FA&nbsp;08&nbsp;BC&nbsp;01&nbsp;24&nbsp;8D&nbsp;<B>82&nbsp;03</B></TT></TD>
    136. 

  136. 		<TD WIDTH="50%" BGCOLOR="#CCFFCC"><I>Variable header: Backup</I></TD>
    137. 

  137. 	</TR>
    138. 

  138. 	<TR>
    139. 

  139. 		<TD BGCOLOR="#FFCCCC">TI:</TD>
    140. 

  140. 		
    141. 

  141.     <TD WIDTH="50%" BGCOLOR="#FFCCCC"><B><TT>82&nbsp;56&nbsp;09&nbsp;00</TT></B></TD>
    142. 

  142. 		<TD WIDTH="50%" BGCOLOR="#FFCCCC"><I>Acknowledgement of header</I></TD>
    143. 

  143. 	</TR>
    144. 

  144. 	<TR>
    145. 

  145. 		<TD BGCOLOR="#FFCCCC">&nbsp;</TD>
    146. 

  146. 		
    147. 

  147.     <TD WIDTH="50%" BGCOLOR="#FFCCCC"><B><TT>82&nbsp;09&nbsp;09&nbsp;00</TT></B></TD>
    148. 

  148. 		<TD WIDTH="50%" BGCOLOR="#FFCCCC"><I>Clear to send backup</I></TD>
    149. 

  149. 	</TR>
    150. 

  150. 	<TR>
    151. 

  151. 		<TD BGCOLOR="#CCFFCC">PC:</TD>
    152. 

  152. 		<TD WIDTH="50%" BGCOLOR="#CCFFCC"><B><TT>02&nbsp;56&nbsp;00&nbsp;00</TT></B></TD>
    153. 

  153. 		<TD WIDTH="50%" BGCOLOR="#CCFFCC"><I>Acknowledgement of CTS</I></TD>
    154. 

  154. 	</TR>
    155. 

  155. 	<TR>
    156. 

  156. 		<TD BGCOLOR="#CCFFCC">&nbsp;</TD>
    157. 

  157. 		<TD WIDTH="50%" BGCOLOR="#CCFFCC"><B><TT>02&nbsp;15&nbsp;FC&nbsp;07&nbsp;</TT></B>&lt;7FCh&nbsp;bytes&nbsp;of&nbsp;data&nbsp;plus&nbsp;checksum&gt;</TD>
    158. 

  158. 		<TD WIDTH="50%" BGCOLOR="#CCFFCC"><I>Backup data section 1 (system data)</I></TD>
    159. 

  159. 	</TR>
    160. 

  160. 	<TR>
    161. 

  161. 		<TD BGCOLOR="#FFCCCC">TI:</TD>
    162. 

  162. 		
    163. 

  163.     <TD WIDTH="50%" BGCOLOR="#FFCCCC"><B><TT>82&nbsp;56&nbsp;FC&nbsp;07</TT></B></TD>
    164. 

  164. 		<TD WIDTH="50%" BGCOLOR="#FFCCCC"><I>Acknowledgement of data</I></TD>
    165. 

  165. 	</TR>
    166. 

  166. 	<TR>
    167. 

  167. 		<TD BGCOLOR="#CCFFCC">PC:</TD>
    168. 

  168. 		<TD WIDTH="50%" BGCOLOR="#CCFFCC"><B><TT>02&nbsp;15&nbsp;FA&nbsp;08&nbsp;</TT></B>&lt;8FAh&nbsp;bytes&nbsp;of&nbsp;data&nbsp;plus&nbsp;checksum&gt;</TD>
    169. 

  169. 		<TD WIDTH="50%" BGCOLOR="#CCFFCC"><I>Backup data section 2 (user data)</I></TD>
    170. 

  170. 	</TR>
    171. 

  171. 	<TR>
    172. 

  172. 		<TD BGCOLOR="#FFCCCC">TI:</TD>
    173. 

  173. 		
    174. 

  174.     <TD WIDTH="50%" BGCOLOR="#FFCCCC"><B><TT>82&nbsp;56&nbsp;FA&nbsp;08</TT></B></TD>
    175. 

  175. 		<TD WIDTH="50%" BGCOLOR="#FFCCCC"><I>Acknowledgement of data</I></TD>
    176. 

  176. 	</TR>
    177. 

  177. 	<TR>
    178. 

  178. 		<TD BGCOLOR="#CCFFCC">PC:</TD>
    179. 

  179. 		<TD WIDTH="50%" BGCOLOR="#CCFFCC"><B><TT>02&nbsp;15&nbsp;BC&nbsp;01&nbsp;</TT></B>&lt;1BCh&nbsp;bytes&nbsp;of&nbsp;data&nbsp;plus&nbsp;checksum&gt;</TD>
    180. 

  180. 		<TD WIDTH="50%" BGCOLOR="#CCFFCC"><I>Backup data section 3 (variable table?)</I></TD>
    181. 

  181. 	</TR>
    182. 

  182. 	<TR>
    183. 

  183. 		<TD BGCOLOR="#FFCCCC">TI:</TD>
    184. 

  184. 		
    185. 

  185.     <TD WIDTH="50%" BGCOLOR="#FFCCCC"><B><TT>82&nbsp;56&nbsp;BC&nbsp;01</TT></B></TD>
    186. 

  186. 		<TD WIDTH="50%" BGCOLOR="#FFCCCC"><I>Acknowledgement of data</I></TD>
    187. 

  187. 	</TR>
    188. 

  188. </TABLE>
    189. 

  189. <BR>
    190. 

  190. 

  191. <TABLE BORDER="0" CELLSPACING="0" WIDTH="100%">
    192. 

  192. 	<TR>
    193. 

  193. 		<TD WIDTH="32%">
    194. 

  194. 			<P ALIGN="CENTER"><A HREF="silent.html"><IMG SRC="graphics/prevpage.gif" WIDTH="32" HEIGHT="32"
    195. 

  195. 			ALIGN="BOTTOM" ALT="[previous page]" BORDER="2"><BR>
    196. 

  196. 			Silent transfers</A>
    197. 

  197. 		</TD>
    198. 

  198. 		<TD WIDTH="34%">
    199. 

  199. 			<P ALIGN="CENTER"><A HREF="index.html"><IMG SRC="graphics/home.gif" WIDTH="32" HEIGHT="32" ALIGN="BOTTOM"
    200. 

  200. 			ALT="[home]" BORDER="2"><BR>
    201. 

  201. 			Table of Contents</A>
    202. 

  202. 		</TD>
    203. 

  203. 		<TD WIDTH="34%">
    204. 

  204. 			<P ALIGN="CENTER"><A HREF="vars.html"><IMG SRC="graphics/nextpage.gif" WIDTH="32" HEIGHT="32"
    205. 

  205. 			ALIGN="BOTTOM" ALT="[next page]" BORDER="2"><BR>
    206. 

  206. 			Variable Formats</A>
    207. 

  207. 		</TD>
    208. 

  208. 	</TR>
    209. 

  209. </TABLE>
    210. 

  210. 

  211. <HR ALIGN="CENTER">
    212. 

  212. <I>Site maintained by Romain Li&eacute;vin (</I><A HREF="mailto:roms@lpg.ticalc.org"><I>roms@lpg.ticalc.org</I></A><I>)
    213. 

  213. and Tim Singer (</I><A HREF="mailto:tsinger@gladstone.uoregon.edu"><I>tsinger@gladstone.uoregon.edu</I></A><I>)</I>
    214. 

  214. </BODY>
    215. 

  215. 

  216. </HTML>
    217.