[471] in linux-net channel archive
Re: PLIP still a no go
daemon@ATHENA.MIT.EDU (Martin Kraemer)
Tue Jun 13 08:47:35 1995
To: m-ke0082@SPARKY.CS.NYU.EDU (Ken Estes)
Date: Tue, 13 Jun 1995 12:44:54 +0200 (MDT)
From: "Martin Kraemer" <Martin.Kraemer@mch.sni.de>
In-Reply-To: <9506130357.AA08798@SPARKY.CS.NYU.EDU> from "Ken Estes" at Jun 12, 95 11:57:22 pm
Hello Ken,
> [...] It is an old
> machine) I have the cable plugged into the parallel port that came
> with the machine. I have done nothing special to the machine
One (stupid) idea comes to my mind... is it possible that you have a
_buffered_ printer card? That is, one where the parallel interface chip's
output pins do not go directly to the plug but go thru a buffer chip (that
prevents the parallel interface chip from dying when there's static
electricity on the plug). These buffers work only unidirectional, thus
making bidirectional use of the port impossible (As far as I remember, the
PLIP protocol works using 4-bit wide "nibbles". But then again, I might be
wrong).
At least, you could try to use a "well known" printer card, since your
configuration seems to be correct.
One thing that struck me was this:
[nimbus]
> plip0 Link encap:10Mbps Ethernet HWaddr FC:FC:80:FD:9A:20
> inet addr:128.253.154.32 P-t-P:128.253.154.33 Mask:255.255.0.0
> UP POINTOPOINT RUNNING MTU:1500 Metric:1
> RX packets:0 errors:0 dropped:0 overruns:0
> TX packets:522 errors:0 dropped:0 overruns:0
> Interrupt:5 Base address:0x3bc
> ----------------------------------------------
> from cirrus we have
> plip1 Link encap:10Mbps Ethernet HWaddr FC:FC:80:FD:9A:21
> inet addr:128.253.154.33 P-t-P:128.253.154.32 Mask:255.255.0.0
> UP POINTOPOINT RUNNING MTU:1500 Metric:1
> RX packets:643 errors:0 dropped:1 overruns:0
> TX packets:0 errors:819 dropped:0 overruns:0
^^^^^^^^^^
> Interrupt:7 Base address:0x378
Why does only cirrus have Tx errors? It seems to be able to receive,
though! Perhaps it even received all of the 522 sent packets sent by
nimbus.
Martin
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