I'd be surprised that CONSSYC would have been possible in VM/ESA 2.4.0.
But, you can try it easily:
- logon to a class G user
- DETACH all its R/W disks
- LINK MAINT 123 123 RR   --> RR, Read/Only is very important
- SET MACHINE ESA
- IPL 123 LOADPARM CONSSYSC
If it works, you'd see some VM IPL messages until VM dies as it cannot write
to 123, or doesn't find some page/spool packs to page out things.
But, I expect you will only see a "CP Entered: Disabled wait"

I always said: SYSC is only useful to IPL a VM system if you don't have to
change something to its default setup.  As soon as you want to select
another nucleus/config file/.. you need the help of SAPL, and that means
having a 3270 during IPL.
A modern z/VM allows for more overrides than just CONSxxx via LOADPARM, but
with 8 characters you don't have much space, if I remember LOADPARM FNxxxxxx
is recognized too

2009/12/28 Billy R. Bingham <billy.bingham...@suddenlink.net>

> And one more question :)
>
> How far back does this go? IE: VM/ESA 2.4.0
>
>
> Billy
> ---- Kris Buelens <kris.buel...@gmail.com> wrote:
> > As Loadparm: SYSC is less useful than SYSG
> > Loadparm:
> >  *SYSG *= start the SAPL screen on the "Integrated 3270 console"
> >  *SYSC *= won't work, SAPL know 3270's only
> >  *CONSSYSG *= bypasses SAPL screen, but telles CP to use the "Integrated
> > 3270 console" as console
> >  *CONSSYSC *= bypasses SAPL and tells CP to use this linemode console as
> > console.
> >
> > 2009/12/28 McKown, John <john.mck...@healthmarkets.com>
> >
> > >  Sorry, I think that I was thinking on the IPLPARM in the HMC. Maybe.
> If
> > > I'm not too EggNogged up.
> > >
> > >
> > > *John McKown *
> > >
> > > *Systems Engineer IV*
> > >
> > > *IT*
> > >
> > >
> > >
> > > Administrative Services Group
> > >
> > > * *
> > >
> > > *HealthMarkets*®
> > >
> > > **
> > >
> > > 9151 Boulevard 26 • N. Richland Hills • TX 76010
> > >
> > > (817) 255-3225 phone • (817)-961-6183 cell
> > >
> > > john.mck...@healthmarkets.com • www.HealthMarkets.com
> > >
> > >
> > >
> > > *Confidentiality Notice:* This e-mail message may contain confidential
> or
> > > proprietary information. If you are not the intended recipient, please
> > > contact the sender by reply e-mail and destroy all copies of the
> original
> > > message. HealthMarkets® is the brand name for products underwritten and
> > > issued by the insurance subsidiaries of HealthMarkets, Inc. –The
> Chesapeake
> > > Life Insurance Company®, Mid-West National Life Insurance Company of
> > > TennesseeSM and The MEGA Life and Health Insurance Company.SM
> > >
> > >
> > >  ------------------------------
> > > *From:* The IBM z/VM Operating System [mailto:ib...@listserv.uark.edu]
> *On
> > > Behalf Of *Kris Buelens
> > > *Sent:* Monday, December 28, 2009 12:01 PM
> > >
> > > *To:* IBMVM@LISTSERV.UARK.EDU
> > > *Subject:* Re: Operating System Messsages Console
> > >
> > > In the SYSTEM CONFIG file it is SYSTEM_CONSOLE (as opposed to
> SYSTEM_3270
> > > for SYSG).
> > >
> > > 2009/12/28 McKown, John <john.mck...@healthmarkets.com>
> > >
> > >>  > -----Original Message-----
> > >> > From: The IBM z/VM Operating System
> > >> > [mailto:ib...@listserv.uark.edu] On Behalf Of Billy R. Bingham
> > >> > Sent: Monday, December 28, 2009 11:39 AM
> > >> > To: IBMVM@LISTSERV.UARK.EDU
> > >> > Subject: Operating System Messsages Console
> > >> >
> > >> > Hello all,
> > >> >
> > >> > What would be the parameter for VM to use the 'Operating
> > >> > System Messages' console that is available. I think it might
> > >> > also be referred to as the Integrated Console.
> > >> >
> > >> >
> > >> > Thanks,
> > >> >
> > >> > Billy
> > >>
> > >> The line mode console is SYSC. The 3270 mode console is SYSG.
> > >>
> > >> --
> > >> John McKown
> > >> Systems Engineer IV
> > >> IT
> > >>
> > >> Administrative Services Group
> > >>
> > >> HealthMarkets(r)
> > >>
> > >> 9151 Boulevard 26 * N. Richland Hills * TX 76010
> > >> (817) 255-3225 phone * (817)-961-6183 cell
> > >> john.mck...@healthmarkets.com * www.HealthMarkets.com
> > >>
> > >> Confidentiality Notice: This e-mail message may contain confidential
> or
> > >> proprietary information. If you are not the intended recipient, please
> > >> contact the sender by reply e-mail and destroy all copies of the
> original
> > >> message. HealthMarkets(r) is the brand name for products underwritten
> and
> > >> issued by the insurance subsidiaries of HealthMarkets, Inc. -The
> Chesapeake
> > >> Life Insurance Company(r), Mid-West National Life Insurance Company of
> > >> TennesseeSM and The MEGA Life and Health Insurance Company.SM
> > >>
> > >>
> > >>
> > >
> > >
> > > --
> > > Kris Buelens,
> > > IBM Belgium, VM customer support
> > >
> > >
> >
> >
> > --
> > Kris Buelens,
> > IBM Belgium, VM customer support
>



-- 
Kris Buelens,
IBM Belgium, VM customer support

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