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PA2AGA > TCPDIG 04.09.96 09:57l 206 Lines 7533 Bytes #-10897 (0) @ EU
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Subj: TCP-Group Digest 96/178
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Date: Mon, 02 Sep 96 09:19:16 MET
Message-Id: <tcp_96_178>
From: pa2aga
To: tcp_broadcast@pa2aga-10
Subject: TCP-Group Digest 96/178
X-BBS-Msg-Type: B
TCP-Group Digest Sun, 1 Sep 96 Volume 96 : Issue 178
Today's Topics:
Newbie TNOS user questions
PPP/SLIP in connected AX25? (2 msgs)
Radio Links and AX.25 backoff (2 msgs)
Send Replies or notes for publication to: <TCP-Group@UCSD.Edu>.
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Problems you can't solve otherwise to brian@ucsd.edu.
Archives of past issues of the TCP-Group Digest are available
(by FTP only) from ftp.UCSD.Edu in directory "mailarchives".
We trust that readers are intelligent enough to realize that all text
herein consists of personal comments and does not represent the official
policies or positions of any party. Your mileage may vary. So there.
----------------------------------------------------------------------
Date: Sat, 31 Aug 1996 07:40:40 -0500 (CDT)
From: John Perry <perry@alpha.jpunix.com>
Subject: Newbie TNOS user questions
Hello Everyone,
I just got TNOS 2.02pl2 to compile under FreeBSD 2.1.5R. I
couldn't get it to compile with curses enabled but dumb mode
works. I'll take what I can get. Anyway, I have a question.
I configured TNOS to include full BBS support yet when I start
TNOS, mbox is NOT on the list of available commands and when I issue
the bbs command, I get prompted for login name and password and no
matter what I type in, I fail the login. Can anyone point me in the
right direction to get these problems solved?
--
John Perry - perry@alpha.jpunix.com - PGP-encrypted e-mail welcome!
WWW - http://www.jpunix.com
PGP 2.62 key for perry@jpunix.com is on the keyservers.
------------------------------
Date: Sat, 31 Aug 1996 19:26:33 -0500 (CDT)
From: "Kelly L. Fulks" <kelly@kc4rdj.raider.net>
Subject: PPP/SLIP in connected AX25?
>
> Hi all,
>
> I believe the idea of allowing users to access amprnet with standard
> Win95 equipped PC's etc to be a very good one. It has always struck me
> that with some minor mods the 'TheNet X1J' TNC2 software would do all that
> is needed.
>
> As a reminder TheNet X1J provides an IP router, NET-ROM and normal ax25
> capability to a TNC2. It handles ARP correctly to can create ax25 packets
> with all the correct callsigns etc without needing this info on a packet
> by packet basis from the host.
>
> TheNet X1J currently talks NRS (NET-ROM speak) or KISS out of its RS232
> port. I would think it would not be difficult to add SLIP to this.
>
> Myself and another ham here in the UK are just completing the development
> of a TNC2 clone which runs upto 57K6 from its radio modem and feel this type
> of setup could get a lot more users up and running on radio based IP.
>
>
> ---
>
> Best Regards Matt
>
> Internet:------- matt@nuthatch.dungeon.com
> Amprnet :------- g6wpj@gb7eip.ampr.org
> AX25 BBS:------- G6WPJ@GB7EIP.#31.GBR.EU
> GMSK Radio modem kit details on:
> http://www.g8stw.demon.co.uk/
>
I agree, all X1J needs is a SLIP or PPP interface on the serial port.
That would be nice for many OS's, not just WIN95. I would rather not
have that much knowledge of the RF environment in the OS.
--
Kelly L. Fulks INTERNET kelly@kc4rdj.raider.net
JobSoft Design and Development, Inc. klf@jobsoft.com
118 S Maple St. AMPRNET kc4rdj@kc4rdj.ampr.org.
Murfreesboro, TN 37130 AMATEUR kc4rdj@kc4rdj.#midtn.tn.usa.noam
------------------------------
Date: Sat, 31 Aug 1996 23:40:28 -0500
From: Steve Sampson <ssampson@oklahoma.net>
Subject: PPP/SLIP in connected AX25?
Kelly L. Fulks wrote:
> I agree, all X1J needs is a SLIP or PPP interface on the serial port.
> That would be nice for many OS's, not just WIN95. I would rather not
> have that much knowledge of the RF environment in the OS.
I've read the source over coffee a few times (not too intense), but it
seems there would be plenty of room by deleting all the netrom junk,
and replacing it with an AX.25 to SLIP interface. Program the ROM
with a fixed set of IP's, and you'd be ready to go. Configure it
over the air, or via telnet to a special settup port. Maybe the thing
to do, would be to make a daughter board that plugged into the Z-80
socket. On it would be an 8088 :-)
---
Steve
mailto:ssampson@othello.tinker.af.mil
http://www.oklahoma.net/~ssampson
"Do you know where *your* FBI files are?"
------------------------------
Date: Sat, 31 Aug 96 11:08:00 -0000
From: mikebw@bilow.bilow.uu.ids.net (Mike Bilow)
Subject: Radio Links and AX.25 backoff
Dennis Rosenauer wrote in a message to Mike Bilow:
DR> I disagree. How am I expected to handle a T1 (1.544 Mbits/sec)
DR> with programmed I/O, I get a byte every 5.2 microseconds!
DR> I have to use DMA or shared memory on the card. I also need
DR> hardware MAC address detection.
Ethernet is several times faster than T1, yet it often uses PIO. An IRQ
occurs
only for each buffer of data, not for each byte like the serial port. The
motherboard DMA is generally slower than PIO, and this is why nearly all ISA
Ethernet cards use PIO. Bus-mastering DMA is much faster than motherboard
DMA,
and this is why PCI Ethernet cards usually use bus-mastering DMA.
For that matter, the ISA bus is only clocked at 8 MHz, and running a constant
stream of high speed data across it is obviously impossible.
-- Mike
------------------------------
Date: Sat, 31 Aug 1996 17:51:15 +0100 (BST)
From: alan@lxorguk.ukuu.org.uk (Alan Cox)
Subject: Radio Links and AX.25 backoff
> I disagree. How am I expected to handle a T1 (1.544 Mbits/sec) with
> programmed I/O, I get a byte every 5.2 microseconds!
With an 8K shared memory buffer. Or with an onboard buffer the processor
can do a IO block transfer from. Im not saying you have to pull a byte
ever 5.2 microseconds to the main processor ;).
In fact for a loaded link it makes sense not to have interrupts but enough
buffering for about 2 clock ticks send/recieve. The clock interrupt then
just stuffs the send buffer solid and empties the receive buffer. No point
having interrupts - you know there is going to be work to do. Quite a lot
of sync cards and 32+ port serial interfaces run this way.
> Has anyone given any thought to a suitable protocol for T1 and faster
> speeds? AX.25 really doesn't cut it any more, we are going to have
> to be able to look for callsigns or other MAC address in hardware.
> Anyone have any suggestions?
IP over AX.25 UI works fine at 10Mbit/second. There is also a 128 bit sequence
number AX.25 extension that may be useful.
Alan
------------------------------
End of TCP-Group Digest V96 #178
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