From:	SMTP%"christina.kaiser@fast.co.at" 25-OCT-1994 19:20:38.67
To:	EVERHART
CC:	
Subj:	SystemID on VAX

From: Christina Kaiser <christina.kaiser@fast.co.at>
X-Newsgroups: comp.os.vms
Subject: SystemID on VAX
Message-ID: <199410241404.AA09766@fast.co.at>
Date: Mon, 24 Oct 94 15:04:30 MET
Organization: Info-Vax<==>Comp.Os.Vms Gateway
X-Gateway-Source-Info: Mailing List
Lines: 43
To: Info-VAX@Mvb.Saic.Com

Hi!

I have problems finding a unique System-ID, CPU-Number or 
something similiar on a VAX. I have a program using "sys$getsyiw"
for determining Systemname, Nodename, Version, etc. 

When I tried to add some code-lines for getting the System-ID-number
too, I found in the Includefile <syidef.h> multiple Variables
which seem to contain this.

They are:
#define SYI$_NODE_SYSTEMID 4307         /* systemid of "    "  
#define SYI$_NODE_NUMBER 8220           /* System ID node number 
#define SYI$_SID 4097                   /* System ID register 
#define SYI$_OLDCPU 512                 /* CPU TYPE 

The results on my machine were:

version=V5.4
machine=VAXstation 3100-M76/GP

idn1-int=2146630444    ( SYI$_NODE_SYSTEMID )
idn1-hex=0x7ff2fb2c
idn2-int=2146630464    ( SYI$_NODE_NUMBER   )
idn2-hex=0x7ff2fb40
idn3-int=2146630484    ( SYI$_SID           )
idn3-hex=0x7ff2fb54
idn4-int=2146630504    ( SYI$_OLDCPU        )
idn4-hex=0x7ff2fb68

Does anybody know 
 -what's exactly the difference
 -which is the one I should take when I need a unique and
  not modifyable SystemID
 -and if this matches none of my list, is there another
  way of getting the ID (or finding the right definition 
  of it anywhere)?
  
Thanks a lot to anybody who will think about it.

Greetings
Christina Kaiser