DSP56001 TNC
		 by Jarkko Vuori, s30874w@kaira.hut.fi

This program is a beta version of the DSP TNC for the DSP CARD 3 signal
processor card. It implements the full (Bell 202) TNC with KISS interface.

This program is intended for private use only. You may redistribute far
and wide but charge no money, not even handling fees.

Commercial use of this code is absolutely prohibited without permission of
the author. This code may not be used as the basis of any program that will
be sold, bartered, or in any way traded for gain without the permission of
the author.

There is no warranty. What you see is what you get.


EQUIPMENT REQUIREMENTS

The code is written for Motorola DSP56001 digital signal processor, and it
needs:
    * X memory: 0000H - 00FFH  (approx.)
      Y memory: 0000H - 00FFH  (  -"-  )
      P memory: 0000H - 0FFFH  (  -"-  )
    * SCI port connected to the host computer (by KISS-protocol)
    * Texas TLC32044 converter chip (master clock 5.184 MHz) connected to
      the SSI port
    * SC1 connected to the PTT

To compile the source code you need Motorola ASM56000 cross compiler and
LNK56000 linker and Microsoft Make (or compatible) utility.


OTHER INFO

The code implements DSP KISS-TNC. It uses a special multibit observation in
demodulation, and integrated symbol syncro so its Eb/No ratio is about two dBs
lower than the plain vanilla TNC. It is altought very dependent on the exact
Bell 202 frequencies, so it can't be used on SSB links.


	doc.zip			Original document and schematics
	source.zip		Sources for software