Subject: Re: Re(3): Personal Laserwriter NTR printing problem at NUBS
From: wesley.craig@umich.edu
Date: Fri Jul 08 1994 - 14:09:33 EDT
> From: "Roy Hockett" <roy.hockett@umich.edu>
> To: "wesley.craig@umich.edu" <wesley.craig@umich.edu>
> Well you hit the nail on the head, do you know of a way to set the printer
> so that it will respond to packets with the DDP Check sum calculated. If not
> can you configure netatalk to not calculate DDP Check sums on PAP packets?
Well, I assume that it's *not* a configuration problem on the printer,
but a bug. There is a variable, ddp_cksum, in the netatalk kernel
module which will disable DDP checksum calculations. You can set it in
sys/netatalk/ddp_output.c and rebuild, or you can set it in the already
built module with:
adb -w /usr/local/atalk/etc/netatalk.o
ddp_cksum?W0
Or, you can set it in the running system with:
adb -w -k /usr/local/atalk/etc/netatalk /dev/mem
ddp_cksum/W0
If you set it in the running system, it will need to be done after each
reboot.
:wes
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