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From: F33PAP%DHHDESY3.BITNET@WISCVM.ARPA
Newsgroups: net.ham-radio.packet
Subject: Re: Pressing Issues for Packet Radio Development
Message-ID: <5150@mit-eddie.UUCP>
Date: Fri, 30-Aug-85 03:09:07 EDT
Article-I.D.: mit-eddi.5150
Posted: Fri Aug 30 03:09:07 1985
Date-Received: Sun, 1-Sep-85 05:17:54 EDT
Sender: bcn@mit-eddi.UUCP
Organization: MIT, Cambridge, MA
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From: F33PAP%DHHDESY3.BITNET@WISCVM.ARPA
>   ... should be done vs the other.  They are:
>
>   1) Develop a small, cheap, yet flexible TNC which does AX.25.
>      I believe a z80 system with just 5 other chips could do it; so
>      far, total parts/board/power costs are about $30.

  Here in Hamburg we try to design a TNC which may fit into this. It  is
based on a Z80 using a 8530SCC as serial interface (it does all you need
for HDLC protocol) and 7911 world modem chip (to be able  to  switch  to
300 Bd for HF). Total estimated cost is  about  DM 200  (abt  67$).  The
board is a 10 by 16 cm "EURO"-board with a 31 or 64 pin  connector  (not
decided yet).
  As part of this project we would like  to  have  some  software  info.
If anybody has got the source code for the TAPR TNC  this  would  really
help us with the "protocol hacking".
    Karl-Heinz   DK8HI     BITNET:  F33PAP at DHHDESY3
                           ARPA:    F33PAP%DHHDESY3.BITNET@WISCVM.ARPA