Sounds good! This will be a perfect marriage for the TNC-X (I have two of them and I LOVE them) <br><br>When will the upgraded chips be available? <br><br>73's<br>Stephen<br>K1LNX<br><br><div><span class="gmail_quote">
On 6/10/07, <b class="gmail_sendername">Jason Rausch</b> <<a href="mailto:jason@ke4nyv.com">jason@ke4nyv.com</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
--- Stephen - K1LNX <<a href="mailto:k1lnx@k1lnx.net">k1lnx@k1lnx.net</a>> wrote:<br><br>> Are existing Hamhud II's able to be upgraded to<br>> include KISS support?<br><br>Yes.<br><br>> Was this just a firmware change?
<br><br>Yes and no. You will be able to upgrade by purchasing<br>a PIC18F2525 processor. This is a pin for pin drop in<br>replacement of the current PIC18F252. The only<br>difference is, the 2525 has more on-board RAM and
<br>program space. This is what we needed to have enough<br>buffering for the KISS function.<br><br>Also, since we have more buffering space, we do not<br>have to worry about using the RTS line to hold-off the<br>TNC and cause the HamHUD to "choke" on packets comming
<br>in too fast. For this reason, we are able to re-use<br>the RTS line for waypoint output to a mapping GPS.<br>Better known as the "Anti-Tracker" function. Since<br>this line was already ran through the on-board MAX202,
<br>the end user can simply disconnect this line from the<br>RTS line of the TNC and re-wire it to the receive pin<br>of their GPS. If you have one of my Breakout Boards<br>(<a href="http://www.rpc-electronics.com/hhacc.php">
http://www.rpc-electronics.com/hhacc.php</a>) you can<br>simply re-jump the serial jumper setting to the WP<br>side of the three pin header. This re-routes this<br>line to pin three of the GPS port.<br><br>Jason KE4NYV - HamHUD Development Team
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https://lists.tapr.org/cgi-bin/mailman/listinfo/aprssig</a><br></blockquote></div><br><br clear="all"><br>-- <br>Stephen Brown - ARS K1LNX<br>Johnson City, TN EM86uh