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  1. <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
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  3. <HEAD>
  4. <META NAME="GENERATOR" Content="Visual Page 1.0 for Windows">
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  6. <TITLE>TI-82 Link Protocol Guide - Backup Transfers</TITLE>
  7. </HEAD>
  8. <BODY BGCOLOR="#FFFFE8">
  9. <P><B>TI-82 Link Protocol Guide v1.0</B> - System Backup Transfers</P>
  10. <CENTER>
  11. <H2>
  12. <HR ALIGN="CENTER">
  13. System Backup Transfers</H2>
  14. </CENTER>
  15. <P>A System Backup is one large transmission containing all user-modifiable data in the calculator. The file format
  16. that the TI-82 Graph Link software uses can be found in the <A HREF="fformat.html#backup">file formats</A>
  17. section of this documentation.</P>
  18. <P>The protocol for all system backup transfers is shown below. For information on packet formats, <A HREF="packet.html">click
  19. here</A>.</P>
  20. <P>A computer can be either the sending unit or the receiving unit.</P>
  21. <P>
  22. <TABLE BORDER="1" CELLSPACING="0" WIDTH="92%" BGCOLOR="#FFFFFF">
  23. <TR>
  24. <TH WIDTH="7%" BGCOLOR="#008800"><FONT COLOR="#FFFFFF">Step</FONT></TH>
  25. <TH COLSPAN="3" BGCOLOR="#008800"><FONT COLOR="#FFFFFF">Direction</FONT></TH>
  26. <TH WIDTH="80%" BGCOLOR="#008800"><FONT COLOR="#FFFFFF">Packet</FONT></TH>
  27. </TR>
  28. <TR>
  29. <TD WIDTH="7%" BGCOLOR="#FFFFFF">
  30. <P ALIGN="CENTER">1
  31. </TD>
  32. <TD ROWSPAN="10">
  33. <P ALIGN="CENTER"><IMG SRC="graphics/calc.gif" WIDTH="30" HEIGHT="67" ALIGN="BOTTOM" ALT="Sending Unit" BORDER="0">
  34. </TD>
  35. <TD WIDTH="6%" BGCOLOR="#FFFFFF">
  36. <P ALIGN="CENTER"><IMG SRC="graphics/right.gif" WIDTH="22" HEIGHT="13" ALIGN="BOTTOM" ALT="===>" BORDER="0">
  37. </TD>
  38. <TD ROWSPAN="10">
  39. <P ALIGN="CENTER"><IMG SRC="graphics/calc.gif" WIDTH="30" HEIGHT="67" ALIGN="BOTTOM" ALT="Receiving Unit" BORDER="0">
  40. </TD>
  41. <TD WIDTH="80%" BGCOLOR="#FFFFFF">VAR with <A HREF="packet.html#backup">backup-style header</A> and type ID = 0xF.</TD>
  42. </TR>
  43. <TR>
  44. <TD WIDTH="7%" BGCOLOR="#FFFFFF">
  45. <P ALIGN="CENTER">2
  46. </TD>
  47. <TD WIDTH="6%" BGCOLOR="#FFFFFF">
  48. <P ALIGN="CENTER"><IMG SRC="graphics/left.gif" WIDTH="22" HEIGHT="13" ALIGN="BOTTOM" ALT="<===" BORDER="0">
  49. </TD>
  50. <TD WIDTH="80%" BGCOLOR="#FFFFFF">ACK</TD>
  51. </TR>
  52. <TR>
  53. <TD WIDTH="7%" BGCOLOR="#FFFFFF">
  54. <P ALIGN="CENTER">3
  55. </TD>
  56. <TD WIDTH="6%" BGCOLOR="#FFFFFF">
  57. <P ALIGN="CENTER"><IMG SRC="graphics/left.gif" WIDTH="22" HEIGHT="13" ALIGN="BOTTOM" ALT="<===" BORDER="0">
  58. </TD>
  59. <TD WIDTH="80%" BGCOLOR="#FFFFFF">CTS or SKIP/EXIT. If exit, do step 4 and quit.</TD>
  60. </TR>
  61. <TR>
  62. <TD WIDTH="7%" BGCOLOR="#FFFFFF">
  63. <P ALIGN="CENTER">4
  64. </TD>
  65. <TD WIDTH="6%" BGCOLOR="#FFFFFF">
  66. <P ALIGN="CENTER"><IMG SRC="graphics/right.gif" WIDTH="22" HEIGHT="13" ALIGN="BOTTOM" ALT="===>" BORDER="0">
  67. </TD>
  68. <TD WIDTH="80%" BGCOLOR="#FFFFFF">ACK</TD>
  69. </TR>
  70. <TR>
  71. <TD WIDTH="7%">
  72. <P ALIGN="CENTER">5
  73. </TD>
  74. <TD WIDTH="6%">
  75. <P ALIGN="CENTER"><IMG SRC="graphics/right.gif" WIDTH="22" HEIGHT="13" ALIGN="BOTTOM" ALT="===>" BORDER="0">
  76. </TD>
  77. <TD WIDTH="80%">DATA - section 1 (system data)</TD>
  78. </TR>
  79. <TR>
  80. <TD WIDTH="7%">
  81. <P ALIGN="CENTER">6
  82. </TD>
  83. <TD WIDTH="6%">
  84. <P ALIGN="CENTER"><IMG SRC="graphics/left.gif" WIDTH="22" HEIGHT="13" ALIGN="BOTTOM" ALT="<===" BORDER="0">
  85. </TD>
  86. <TD WIDTH="80%">ACK</TD>
  87. </TR>
  88. <TR>
  89. <TD WIDTH="7%">
  90. <P ALIGN="CENTER">7
  91. </TD>
  92. <TD WIDTH="6%">
  93. <P ALIGN="CENTER"><IMG SRC="graphics/right.gif" WIDTH="22" HEIGHT="13" ALIGN="BOTTOM" ALT="===>" BORDER="0">
  94. </TD>
  95. <TD WIDTH="80%">DATA - section 2 (user data)</TD>
  96. </TR>
  97. <TR>
  98. <TD WIDTH="7%">
  99. <P ALIGN="CENTER">8
  100. </TD>
  101. <TD WIDTH="6%">
  102. <P ALIGN="CENTER"><IMG SRC="graphics/left.gif" WIDTH="22" HEIGHT="13" ALIGN="BOTTOM" ALT="<===" BORDER="0">
  103. </TD>
  104. <TD WIDTH="80%">ACK</TD>
  105. </TR>
  106. <TR>
  107. <TD WIDTH="7%">
  108. <P ALIGN="CENTER">9
  109. </TD>
  110. <TD WIDTH="6%">
  111. <P ALIGN="CENTER"><IMG SRC="graphics/right.gif" WIDTH="22" HEIGHT="13" ALIGN="BOTTOM" ALT="===>" BORDER="0">
  112. </TD>
  113. <TD WIDTH="80%">DATA - section 3 (variable table?)</TD>
  114. </TR>
  115. <TR>
  116. <TD WIDTH="7%">
  117. <P ALIGN="CENTER">10
  118. </TD>
  119. <TD WIDTH="6%">
  120. <P ALIGN="CENTER"><IMG SRC="graphics/left.gif" WIDTH="22" HEIGHT="13" ALIGN="BOTTOM" ALT="<===" BORDER="0">
  121. </TD>
  122. <TD WIDTH="80%">ACK</TD>
  123. </TR>
  124. </TABLE>
  125. <p></P>
  126. <P><U>Example (PC sending backup to TI):</U><BR>
  127. <TABLE BORDER="0" CELLSPACING="0" WIDTH="100%">
  128. <TR>
  129. <TD BGCOLOR="#CCFFCC">PC:</TD>
  130. <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>
  131. <TD WIDTH="50%" BGCOLOR="#CCFFCC"><I>Variable header: Backup</I></TD>
  132. </TR>
  133. <TR>
  134. <TD BGCOLOR="#FFCCCC">TI:</TD>
  135. <TD WIDTH="50%" BGCOLOR="#FFCCCC"><B><TT>82&nbsp;56&nbsp;09&nbsp;00</TT></B></TD>
  136. <TD WIDTH="50%" BGCOLOR="#FFCCCC"><I>Acknowledgement of header</I></TD>
  137. </TR>
  138. <TR>
  139. <TD BGCOLOR="#FFCCCC">&nbsp;</TD>
  140. <TD WIDTH="50%" BGCOLOR="#FFCCCC"><B><TT>82&nbsp;09&nbsp;09&nbsp;00</TT></B></TD>
  141. <TD WIDTH="50%" BGCOLOR="#FFCCCC"><I>Clear to send backup</I></TD>
  142. </TR>
  143. <TR>
  144. <TD BGCOLOR="#CCFFCC">PC:</TD>
  145. <TD WIDTH="50%" BGCOLOR="#CCFFCC"><B><TT>02&nbsp;56&nbsp;00&nbsp;00</TT></B></TD>
  146. <TD WIDTH="50%" BGCOLOR="#CCFFCC"><I>Acknowledgement of CTS</I></TD>
  147. </TR>
  148. <TR>
  149. <TD BGCOLOR="#CCFFCC">&nbsp;</TD>
  150. <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>
  151. <TD WIDTH="50%" BGCOLOR="#CCFFCC"><I>Backup data section 1 (system data)</I></TD>
  152. </TR>
  153. <TR>
  154. <TD BGCOLOR="#FFCCCC">TI:</TD>
  155. <TD WIDTH="50%" BGCOLOR="#FFCCCC"><B><TT>82&nbsp;56&nbsp;FC&nbsp;07</TT></B></TD>
  156. <TD WIDTH="50%" BGCOLOR="#FFCCCC"><I>Acknowledgement of data</I></TD>
  157. </TR>
  158. <TR>
  159. <TD BGCOLOR="#CCFFCC">PC:</TD>
  160. <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>
  161. <TD WIDTH="50%" BGCOLOR="#CCFFCC"><I>Backup data section 2 (user data)</I></TD>
  162. </TR>
  163. <TR>
  164. <TD BGCOLOR="#FFCCCC">TI:</TD>
  165. <TD WIDTH="50%" BGCOLOR="#FFCCCC"><B><TT>82&nbsp;56&nbsp;FA&nbsp;08</TT></B></TD>
  166. <TD WIDTH="50%" BGCOLOR="#FFCCCC"><I>Acknowledgement of data</I></TD>
  167. </TR>
  168. <TR>
  169. <TD BGCOLOR="#CCFFCC">PC:</TD>
  170. <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>
  171. <TD WIDTH="50%" BGCOLOR="#CCFFCC"><I>Backup data section 3 (variable table?)</I></TD>
  172. </TR>
  173. <TR>
  174. <TD BGCOLOR="#FFCCCC">TI:</TD>
  175. <TD WIDTH="50%" BGCOLOR="#FFCCCC"><B><TT>82&nbsp;56&nbsp;BC&nbsp;01</TT></B></TD>
  176. <TD WIDTH="50%" BGCOLOR="#FFCCCC"><I>Acknowledgement of data</I></TD>
  177. </TR>
  178. </TABLE>
  179. <BR>
  180. <TABLE BORDER="0" CELLSPACING="0" WIDTH="100%">
  181. <TR>
  182. <TD WIDTH="32%">
  183. <P ALIGN="CENTER"><A HREF="silent.html"><IMG SRC="graphics/prevpage.gif" WIDTH="32" HEIGHT="32"
  184. ALIGN="BOTTOM" ALT="[previous page]" BORDER="2"><BR>
  185. Silent transfers</A>
  186. </TD>
  187. <TD WIDTH="34%">
  188. <P ALIGN="CENTER"><A HREF="index.html"><IMG SRC="graphics/home.gif" WIDTH="32" HEIGHT="32" ALIGN="BOTTOM"
  189. ALT="[home]" BORDER="2"><BR>
  190. Table of Contents</A>
  191. </TD>
  192. <TD WIDTH="34%">
  193. <P ALIGN="CENTER"><A HREF="vars.html"><IMG SRC="graphics/nextpage.gif" WIDTH="32" HEIGHT="32"
  194. ALIGN="BOTTOM" ALT="[next page]" BORDER="2"><BR>
  195. Variable Formats</A>
  196. </TD>
  197. </TR>
  198. </TABLE>
  199. <HR ALIGN="CENTER">
  200. <I>Site maintained by Romain Li&eacute;vin (</I><A HREF="mailto:roms@lpg.ticalc.org"><I>roms@lpg.ticalc.org</I></A><I>)
  201. and Tim Singer (</I><A HREF="mailto:tsinger@gladstone.uoregon.edu"><I>tsinger@gladstone.uoregon.edu</I></A><I>)</I>
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