| |
PA2AGA > TCPDIG 29.08.96 03:15l 205 Lines 6680 Bytes #-10904 (0) @ EU
BID : TCP_96_173E
Read: GUEST
Subj: TCP-Group Digest 96/173E
Path: DB0AAB<DB0KCP<DB0CZ<DB0LX<DB0RBS<DB0HOM<LX0PAC<ON5VL<ON4RAT<DB0ACC<
PI8DRS<PI8DAZ<PI8GCB<PI8WFL<PI8VNW
Sent: 960828/2006Z @:PI8VNW.#ZH2.NLD.EU #:57088 [Hoek v Holland] FBB5.15c
From: PA2AGA@PI8VNW.#ZH2.NLD.EU
To : TCPDIG@EU
Received: from pa2aga by pi1hvh with SMTP
id AA16318 ; Wed, 28 Aug 96 19:48:02 UTC
Received: from pa2aga-1 by pa2aga (NET/Mac 2.3.61/7.1) with SMTP
id AA00003590 ; Wed, 28 Aug 96 19:24:50 MET
Received: from pa2aga-1 by pa2aga-1 (NET/Mac 2.3.61/7.5.4) with SMTP
id AA00007949 ; Tue, 28 Aug 56 19:10:49 MET
Date: Wed, 28 Aug 96 18:40:35 MET
Message-Id: <tcp_96_173E>
From: pa2aga
To: tcp_broadcast@pa2aga-1
Subject: TCP-Group Digest 96/173E
X-BBS-Msg-Type: B
Hardware compatibility with a real floppy of IDE controller would not be
required, as long as there is a BIOS extension ROM which hooks Int 13h during
the real-mode boot process. Then a Linux driver for the board would be quite
simple to write for use once the switch was made to protected mode.
Essentially unlimited storage would be available by adding EPROM chips, and
compression could be used within the pseudo-filesystem since it would only be
accessed in page mode anyway. The cost of an amount of storage comparable to
a
1.44 MB floppy would probably be comparable to the cost of a 1.44 MB floppy
drive, about US$40.
-- Mike, N1BEE
------------------------------
Date: Mon, 26 Aug 1996 19:22:44 -0700 (PDT)
From: Phil Karn <karn@qualcomm.com>
Subject: Nice NOS code
>It's for porting RSPFd over to NOS, so its packets sit on top of IP.
>So what I do in Linux is open a SOCK_RAW socket with the RSPF PID, tell the
Yup, the socket interface seems like your best bet. Let me know if you
have to make any extensions.
>Right, this is what I meant. The "nicer" way would be some sort of
>function. But as NOS is one program, you can look at almost everything.
Yeah, that's both good and bad...
>etc, so I'll just port these across from the daemon. I thought there might
>of been a "generic linked-list manager" in NOS, as it could use so many for
>ARP caches, routing tables etc.
The idea has occurred to me, but I didn't do it because most linked
list operations are pretty straightforward, and the cost of an extra
function call didn't seem worth it.
Phil
------------------------------
Date: Mon, 26 Aug 1996 22:32:19 +0000 (EST)
From: csmall@gonzo.apana.org.au
Subject: PPP/SLIP in connected AX25?
>
> > Terry Dawson wrote,
> > >
> > > We wouldn't have to spend so much time worrying about one or two bytes
> of
> > > overhead if we'd get off our God-damned butts and improve the link
> speeds
> > > to something approaching modern technology.
> > >
> > > $500 for 56kb isn't all that unaffordable, eh?
> >
> > ha ha. Hey, no arguments from me on that point! It would be awfully
> > lonely
> > here as a 56k user though.
>
> I'd like to know what I could use to get me online at 56Kbps for only $500.
That's $US500 Graham, works out $A800. Actually you and Terry are
reasonably close, you might get a link together.
A couple of us are trying to get some high speed down our way (to the
visitors, I am about 60km south of Graham and Terry). Has anyone ever built
the 38kbps kits from Slovenia? I already have the schematics and PCB layout
(no copper though) but trying to get anything out of them is proving very
difficult.
It uses wide-band FM and a manchester modem, which is a bit different.
- Craig vk2xlz
--
// /\ | | | | ... Craig Small ... ... csmall@gonzo.apana.org.au
||==|--|====|===|==|=| ... [44.136.13.17].. ...csmall@gonzo.vk2xlz.ampr.org
\\ \/ | | | | ... Minto, Australia... VK2XLZ@VK2GDM.NSW.AUS.OC..
------------------------------
Date: Mon, 26 Aug 1996 18:56:32 +0100 (BST)
From: alan@lxorguk.ukuu.org.uk (Alan Cox)
Subject: PPP/SLIP in connected AX25?
> I strongly disagree with this view. PPP adds more data, but it isn't
> "overhead" unless it does no useful work. With PPP, you get more automatic
The CRC's do no useful work because the HDLC in AX.25 does it.
> configuration and considerably improved ease of use. True, we will likely
> never need to exercise some of the enhancements of PPP, such as passing IPX
in
> addition to IP, but we might be able to make use of them someday if we avoid
> closing off our options early.
Most PPP stacks use 15 or 30 second negotiation timers, you'll never
negotiate over 1200 baud AX.25
------------------------------
Date: Mon, 26 Aug 1996 16:37:54 -0700 (PDT)
From: Phil Karn <karn@qualcomm.com>
Subject: PPP/SLIP in connected AX25?
>One of the things that bugged me about NOS was the need to implement the
>AX.25 into it. The TNC had a perfectly good AX.25 implementation. I
Why?
There were (and are) several very good reasons for putting AX.25 into
NOS:
1. It makes the interface between TCP/IP and AX.25 far more
straightforward (just function calls), especially when more than one
AX.25 connection is involved and/or more than one upper layer protocol
is running on each AX.25 connection, or when UI mode is used.
2. It makes AX.25 more easily accessible to NOS applications that want
to use it directly.
3. There are plenty of spare CPU cycles to run the AX.25 protocol, so
why not?
4. It makes it easy to support "dumb" HDLC plug-in cards like the DRSI
card that have no CPUs on board.
5. It's a lot easier to fix bugs in NOS code than in TNC firmware for
which most of us have no source, no development tools and no download
capabilities.
6. It's a lot easier to see what's going on at the AX.25 layer.
Phil
------------------------------
Date: Mon, 26 Aug 1996 22:18:06 -0700 (PDT)
From: Phil Karn <karn@unix.ka9q.ampr.org>
Subject: PPP/SLIP in connected AX25?
>Do you really want to support that style of connection ? :)
Well, it was just a thought. It's not terrifically elegant, but it
does solve a specific need, which is to let people with only a single
computer that happens to run Windows 95 communicate over AX.25 while
running Winsock applications. A separate dedicated router machine
running NOS remains the "preferred" configuration.
Phil
------------------------------
Date: Mon, 26 Aug 1996 23:15:57 -0700 (PDT)
From: Phil Karn <karn@qualcomm.com>
Subject: PPP/SLIP in connected AX25?
>I'd like to know what I could use to get me online at 56Kbps for only $500.
A Motorola BitSurfer and an ISDN line.
I'm not kidding. This is one of the reasons I haven't been very active
in ham radio over the past few years.
Phil
------------------------------
End of TCP-Group Digest V96 #173
******************************
You can send your message for this bulletin
to: tcp-group@pa2aga on .AMPR.ORG-net
or: tcpaga@pi8vnw.#zh2.nld.eu on BBS-net
------
NOT TO: pa2aga@pa2aga or pa2aga@pi8vnw.#zh2.nld.eu PLEASE!!
It will get posted automatically within a few days
Read previous mail | Read next mail
| |
