[9fans] HP-PSC usb printer

[givanes@gmail.com]

Hi,

I've got a HP-PSC1210 printer.
I read some 9fans's archives too understand how to use it, beyond the wiki's pages.
So i test different ways.

plan9% usbstart

i add this line to /sys/lib/devices : 
psc1210		gnot	-	/dev/usb0/2/ep3data	-	gsijs!PSC+1210	generic	nospool	-	-	-	-

(gnot is my machine's name)

helped with this output:
plan9% cat /dev/usb0/1/status
Enabled 0x00ccff
 0 0x00ccff        147 bytes         23 blocks
 1 0x00ccff          0 bytes          0 blocks
 2 0x00ccff          0 bytes          0 blocks
 3 0x020107          0 bytes          0 blocks
 4 0x020107          0 bytes          0 blocks
 5 0x00d4ff          0 bytes          0 blocks
 6 0x00d4ff          0 bytes          0 blocks

plan9% echo -n 'ep 3 bulk w 64 32' > /dev/usb0/1/ctl
plan9% bind /dev/usb0/1/ep3data /n/lp
bind /dev/usb0/1/ep3data /n/lp: inconsistent mount

As i read, i tried to create an empty file:
plan9% touch /n/lp
touch: /n/lp: cannot create: '/n/lp' file already exists
??

Even if this doesn't work, i tested 'lp':
plan9% lp -dpsc1210 readme.rio 
AFPL Ghostscript 8.53: **** Could not open the file  .
AFPL Ghostscript 8.53: Unrecoverable error, exit code 1
cat: can't open /tmp/gsp622: '/tmp/gsp622' file does not exist
rm: /tmp/gsp622: '/tmp/gsp622' file does not exist


So i'd like to know how i can resolve this.
Which man or doc could be usefull?

Thanks.

gabriel