Date: Sun, 14 Feb 93 04:30:09 PST
From: Advanced Amateur Radio Networking Group <tcp-group@ucsd.edu>
Errors-To: TCP-Group-Errors@UCSD.Edu
Reply-To: TCP-Group@UCSD.Edu
Precedence: Bulk
Subject: TCP-Group Digest V93 #42
To: tcp-group-digest


TCP-Group Digest            Sun, 14 Feb 93       Volume 93 : Issue   42

Today's Topics:
                      need help:DRSI,9600bd,SCC.

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Date: Sat, 13 Feb 93 22:31:11 PST
From: pjb@hss.caltech.edu (Paul Brewer)
Subject: need help:DRSI,9600bd,SCC.
To: tcp-group@ucsd.edu

NOS is configured for use with a DRSI card with the attach scc 
command, in the following way:

attach scc 1 init 0x300 16 2 0 1 0 7 p4915200 8
attach scc 0 ax25 ax0 256 d9600 1024
attach scc 1 ax25 ax1 256 d9600 1024


The configuration is two tapr-9600 baud modems connected to the drsi 
card (PCPA-3). 

Behaviour is as follows:

Nothing is seen on trace.

The DCD on the modem and the DCD on the DRSI card both light when a 
packet is heard.

The SCC stat rxints increases. So does the exints, and the space counter.
According to scc.h, space is really nospace and in incremeented when there
aren't enough buffers. However, there is plenty of memory. Also there should
be plenty of nibufs.

Nothing is displayed on trace, and no callsigns appear in the heard 
(of course because its not allocating space or has run out of space to store
the packets).

On transmit, the red drsi led lights, but the modem does not key. 

The modem provides its own clock (an optional accessory on a tapr modem).
When I was given the modem I was told that it worked on a drsi card. The guy
who built and tested it is credible, but unfortunately is out of town for 
a little while. 

The DRSI card is configured for the standard 0x300 irq 7. There is no 
other card in the computer except a floppy controller and a monitor
(no com ports), which is a intel 386/25dx. The MC1488 and 1489 were replaced
by headers for ttl drive to the modem. However I am unsure how to set the clock
jumpers. Setting them up for ext clock causes irrational behavior of the drsi
dcd/tx lights, so i assume that what ive got is reasonably correct.

The nospace counter seems to indicate a misconfiguration or a software
glitch. Except for ax25 mycall, I have nothing else in the autoexec.nos
(in fact, i typed these three lines in by hand with no autoexec). 

The software is WG7J 1.08b.
A

Anyone seen this before? What am I doing wrong? 

Thanks & 73 de Paul KI6CQ
pjb@hss.caltech.edu

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End of TCP-Group Digest V93 #42
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