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Path: utzoo!watmath!clyde!burl!ulysses!bellcore!decvax!genrad!mit-eddie!F33PAP%DHHDESY3.BITNET@WISCVM.WISC.EDU
From: F33PAP%DHHDESY3.BITNET@WISCVM.WISC.EDU
Newsgroups: net.ham-radio.packet
Subject: Re: USING A PC AS A TNC
Message-ID: <1069@mit-eddie.UUCP>
Date: Tue, 28-Jan-86 03:13:54 EST
Article-I.D.: mit-eddi.1069
Posted: Tue Jan 28 03:13:54 1986
Date-Received: Thu, 30-Jan-86 04:40:35 EST
Sender: daemon@mit-eddi.UUCP
Organization: MIT, Cambridge, MA
Lines: 18

From: F33PAP%DHHDESY3.BITNET@WISCVM.WISC.EDU
A software solution for the TRS-80 has been written by W4UCH. I  took
the basic transmit and receive routines as well as  the  *great*  CRC
generating and checking and transferred it to my Schneider  (Amstrad)
CPC464. "It is not easy but not impossible to transfer these routines
to another PC" (W4UCH, quotation may not be 100%  correct,  I  havn't
got the original text with me).
This software solution works rather fine, if you forget  that  it  is
impossible to  enter  something  into  the  keyboard  while  you  are
receiving or transmitting. The software PLL needs  the  interrupt  to
be switched off, so you can't do anything else...
I intend to make my own keyboard routine, equalized for  time  delay,
and put it right into the PLL loop (hard work that is?).
To summarize: I know of three PC's  a  so  called  software  solution
is running on 1) W4UCH's  TRS-80,  2)  DIGICOM>64  for  the  C64  and
3) my adopted version of W4UCH for the Amstrad CPC464.
73,
     Karl-Heinz          DK8HI