Linux-Hams archive - November 1999: Re: USCC card problem using linux

Re: USCC card problem using linux

Robert Schelander (terhi.victor@logonet.com)
Tue, 2 Nov 1999 21:43:42 +0100

Compare it with my working z8530drv.conf, maybe you find
something that could help you.
Also try using softdcd off, if your modem supports a hard-dcd
signal, because softdcd causes lots of interrupts which could
slow down already slow machines.
Also check RxOver and TxUnder with sccstat /dev/sccX, they
should be 0.
Maybe try compiling the uscc code in the kernel with this special
delay. I my case it's not needed, maybe it's a useless suggestion,
but it could be necessary in your case. So take it just as a hint if
nothing else helps.
I'm using Baycom USCC with DF9IC 9k6 and T7F as transceiver.

Robert

# z8530drv.conf - initialization for the Z8530 SCC driver v 2.4
#
chip 1
data_a 0x320 # data port A
ctrl_a 0x324 # control port A
data_b 0x321 # data port B
ctrl_b 0x325 # control port B
irq 5 # IRQ No. 5 (#)
pclock 4915200 # clock (+)
board BAYCOM # hardware type (*)
escc no # enhanced SCC chip? (8580/85180/85280) (*)
vector no # latch for interrupt vector ($)
special no # address of special function register (*)
option 0 # option to set via sfr (*)
# SCC chip 2
chip 2
data_a 0x322
ctrl_a 0x326
data_b 0x323
ctrl_b 0x327
board BAYCOM
# Definition of /dev/scc0
device /dev/scc0
speed 9600
clock dpll
mode nrz
#
txdelay 9
persist 128
slot 6
tail 4
fulldup 0
wait 12
min 3
maxkey 7
idle 3
maxdef 120
group 0
txoff off
softdcd off
#
device /dev/scc1
speed 1200
clock dpll
mode nrzi
txdelay 40
persist 64
slot 8
tail 8
fulldup 0
wait 12
min 3
maxkey 7
idle 3
maxdef 120
group 0
txoff off
softdcd on
#

-----Ursprüngliche Nachricht-----
Von: Carlos A Schneider <cbyyuo@mcex.net>
An: gkz.ngbk@krasu.ru <cvjrgju@abacom.com>
Datum: Dienstag, 02. November 1999 09:44
Betreff: USCC card problem using linux

>Hello all!
>I'm trying to configure my USCC card to work in 9k6, with no success.
>I can stablish the link, but there are about 50% loss of incoming
>frames.
>The same hardware, running BayCom under DOS, works well; so, I can
>discard hardware failure.
>I have played a lot with the ax25 config parameters, with no results.
>Below, a description of my system:
>Intel 486DX2-66, 8 Mb RAM, linux slackware 2.0.29, z8530drv-2.4c,
>USCC card Microlaser (BayCom like), radio TEKK KS900.
>
>Any ideas to help?
>
>TIA
>
>Schneider - py5vs
>
>
>