From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <tuhs-bounces@tuhs.org>
X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on inbox.vuxu.org
X-Spam-Level: 
X-Spam-Status: No, score=-0.8 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS,
	MAILING_LIST_MULTI,T_SCC_BODY_TEXT_LINE autolearn=ham
	autolearn_force=no version=3.4.4
Received: from minnie.tuhs.org (minnie.tuhs.org [50.116.15.146])
	by inbox.vuxu.org (Postfix) with ESMTP id A80E6232A9
	for <ml@inbox.vuxu.org>; Mon, 18 Mar 2024 16:20:47 +0100 (CET)
Received: from minnie.tuhs.org (localhost [IPv6:::1])
	by minnie.tuhs.org (Postfix) with ESMTP id 56CFC4268A;
	Tue, 19 Mar 2024 01:20:43 +1000 (AEST)
Received: from mcvoy.com (mcvoy.com [192.169.23.250])
	by minnie.tuhs.org (Postfix) with ESMTPS id 0A8C242652
	for <tuhs@tuhs.org>; Tue, 19 Mar 2024 01:20:40 +1000 (AEST)
Received: by mcvoy.com (Postfix, from userid 3546)
	id 5219335E92C; Mon, 18 Mar 2024 08:20:39 -0700 (PDT)
Date: Mon, 18 Mar 2024 08:20:39 -0700
From: Larry McVoy <lm@mcvoy.com>
To: Paul Winalski <paul.winalski@gmail.com>
Message-ID: <20240318152039.GN13814@mcvoy.com>
References: <alpine.BSF.2.21.9999.2403182158390.86416@aneurin.horsfall.org>
 <CAC20D2O=puTR4qxRvVS0i2oYqYTMEza=7scP5h+CfL0WYDroMw@mail.gmail.com>
 <CABH=_VSUT+R5YPcLPqNKQPp6Q-vV_-FmyUYPF9aMsHZ-OoNVuA@mail.gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <CABH=_VSUT+R5YPcLPqNKQPp6Q-vV_-FmyUYPF9aMsHZ-OoNVuA@mail.gmail.com>
User-Agent: Mutt/1.5.24 (2015-08-30)
Message-ID-Hash: WM62AL34AT2ZWZZPHBWEUZ4RA75MRJHC
X-Message-ID-Hash: WM62AL34AT2ZWZZPHBWEUZ4RA75MRJHC
X-MailFrom: lm@mcvoy.com
X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header
CC: The Eunuchs Hysterical Society <tuhs@tuhs.org>
X-Mailman-Version: 3.3.6b1
Precedence: list
Subject: [TUHS] Re: Of /dev/tty8
List-Id: The Unix Heritage Society mailing list <tuhs.tuhs.org>
Archived-At: <https://www.tuhs.org/mailman3/hyperkitty/list/tuhs@tuhs.org/message/WM62AL34AT2ZWZZPHBWEUZ4RA75MRJHC/>
List-Archive: <https://www.tuhs.org/mailman3/hyperkitty/list/tuhs@tuhs.org/>
List-Help: <mailto:tuhs-request@tuhs.org?subject=help>
List-Owner: <mailto:tuhs-owner@tuhs.org>
List-Post: <mailto:tuhs@tuhs.org>
List-Subscribe: <mailto:tuhs-join@tuhs.org>
List-Unsubscribe: <mailto:tuhs-leave@tuhs.org>

On Mon, Mar 18, 2024 at 10:58:04AM -0400, Paul Winalski wrote:
> On Mon, Mar 18, 2024 at 9:57???AM Clem Cole <clemc@ccc.com> wrote:
> 
> > The DZ11 is an eight-port mux (with short pinned modem control and no DMA
> > - both causing issues).
> >
> 
> I'm pretty sure that when we beta tested the VAX-11/780 in the summer of
> 1977 it had a DZ11.  We only had a few LA36 printing terminals on it so we
> never saw any issues with it.  Not so when I started work at DEC in 1980.
> The VAX-11/780 I worked on had IIRC three DZ11a supporting 24 terminals.
> The lack of DMA was a big issue.  We had to run our VT52s no faster than
> 300 baud or it brought the system to its knees.

I was one of about 40 students working on a terminal hooked to a 780.
I put up with it for a semester and then bought a 4mhz 128KB Z80
CPM machine.  It was not that fast but it was all mine.  I was more
productive on the Z80.

I got a $2000 loan to buy it.  Taught me that I really really hated to
owe the bank.