From:	CRDGW2::CRDGW2::MRGATE::"SMTP::CRVAX.SRI.COM::RELAY-INFO-VAX" 27-OCT-1989 20:04
To:	MRGATE::"ARISIA::EVERHART"
Subj:	RE: quick question: Can you set NVA and LTA terminals /DISCONNECT?

Message-Id:  <8910272353.AA22030@crdgw1.ge.com>
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Date:    Sat, 28 Oct 1989 00:35:17  +0100
From: "GWDGV1::MOELLER"  <U0012%DGOGWDG5.BITNET@CUNYVM.CUNY.EDU>
To: info-vax@sri.COM
Subject: RE: quick question: Can you set NVA and LTA terminals /DISCONNECT?

A few hours ago, I asked:
> For a test, at least, I would like all terminals to have the /DISCONNECT
> feature.
> I know that I ought to reboot, but would like to know beforehand
> if it's possible at all.
>
> Note: I just patched NVA0, LTA0, and TTY$GL_DEFCHAR2 on the running system,
> to no avail ...

Joel M Snyder <JMS@mis.arizona.edu> quickly replied:
> Yes.  We have all our temrinals (except RT!!!) as /DISCONNECT.
> [...]
> But, in any case, if you fix TT_DEFCHAR/2, they'll all come up
> with /DISCONNECT.

.. and of course it works.
To summarize:
        Add 2**17 = 131072 to the SYSGEN parameter TTY_DEFCHAR2
        (with the default of 4098, the new value is 135170 decimal),
        "write current", and re-boot.

For those who like to patch a live system:
There is no point in modifying UCB$L_DEVDEPND2 of the template UCB,
since that will be (essentially) overridden by the value in
UCB$L_TT_DECHA1 (TTY extension), so the latter is the place to patch.

Wolfgang J. Moeller, GWDG, D-3400 Goettingen, F.R.Germany | Disclaimer ...
Bitnet/Earn: U0012@DGOGWDG5         Phone: +49 551 201516 | No claim intended