HP 720 workstation boot from CD

[cfj]

Hello, 

I am trying to boot a HP Series 720 model workstation using Debian port 
from  CD number 1 using a SCSI CD.
I'd like to change experiences with users that have this model of 
workstation to know details about ISL commands to access my CD. I read the 
text http://pateam.esiee.fr/parisc-linux-boot/doc.html but my code revision 
of ISL is 3.2 and the menus are completely diferent.
I am trying to use the follow sintaxe from ISL to boot:
ISL> hpux boot disc(2/1.2.0;0)
Can anyone help me how to get the correct code to try the CD access?
Thanks in advance,
  Cloves.