3d modelling software - test-drb@ccmp.vtda.org

23 Aug 2021

Hello Rob,
FreeCAD is nice for modeling 3D shapes.
For 3D printing, depending on the technology of 3D printer, you need to process original
model to convert compact sections into hollow honeycomb structure, and add small plastic
bars into empty volumes to support the model while it's printed.
I'm not expert of this latter procedure and tools.
Andrea
Aug 23, 2021 19:07:55 cctech-request at classiccmp.org:
...
  Send cctech mailing list submissions to
 ? cctech at classiccmp.org
 To subscribe or unsubscribe via the World Wide Web, visit
 ? http://www.classiccmp.org/mailman/listinfo/cctech
 or, via email, send a message with subject or body 'help' to
 ? cctech-request at classiccmp.org
 You can reach the person managing the list at
 ? cctech-owner at classiccmp.org
 When replying, please edit your Subject line so it is more specific
 than "Re: Contents of cctech digest..."
 Today's Topics:
 ?? 1. Tektronix XpressWare 8.1 (Cameron Kaiser)
 ?? 2. Re: Tektronix XpressWare 8.1 (Doc Shipley)
 ?? 3. Re: Ultrix-11 (Peter Allan)
 ?? 4. Need Spectravideo SVI-328 parts.... (geneb)
 ?? 5. 3d modelling software (Rob Jarratt)
 ----------------------------------------------------------------------
 Message: 1
 Date: Sun, 22 Aug 2021 17:16:49 -0700 (PDT)
 From: Cameron Kaiser <spectre at floodgap.com>
 To: cctalk at classiccmp.org
 Cc: Cameron Kaiser <spectre at floodgap.com>
 Subject: Tektronix XpressWare 8.1
 Message-ID: <202108230016.17N0Gn3c16973864 at floodgap.com>
 Content-Type: text/plain; charset=US-ASCII
 Bitsavers has 6.3 (thank you Al) but I'm trying to push my luck and find
 8.1 for this XP421CH Xterm. Anyone know of where it can be found?
 --
 ------------------------------------ personal: http://www.cameronkaiser.com/ --
 ? Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckaiser at floodgap.com
 -- FOOLS! I WILL DESTROY YOU ALL! ASK ME HOW! -- "Girl Genius" 8/29/07 --------
 ------------------------------
 Message: 2
 Date: Sun, 22 Aug 2021 21:08:21 -0500
 From: Doc Shipley <doc at vaxen.net>
 To: Cameron Kaiser via cctalk <cctalk at classiccmp.org>
 Subject: Re: Tektronix XpressWare 8.1
 Message-ID: <8c287f5c-4ad8-1002-570c-1c671c689494 at vaxen.net>
 Content-Type: text/plain; charset=utf-8; format=flowed
 On 8/22/21 19:16, Cameron Kaiser via cctalk wrote:
  Bitsavers has 6.3 (thank you Al) but I'm
trying to push my luck and find
 8.1 for this XP421CH Xterm. Anyone know of where it can be found?

 Well....
 There's this:
 http://bio.gsi.de/DOCS/NCD/www.technogoths.demon.co.uk/tekxp400/node3.html
 and there's this:
 http://www.docsbox.net/V81106.tgz
 Please don't kill my server.
 ? It's been a long long time since I had the XP400D, and I don't think I
 ever tried connecting from Windows, so you're kind of on your own.? Good
 luck!
 ? Doc
 ------------------------------
 Message: 3
 Date: Mon, 23 Aug 2021 10:11:26 +0100
 From: Peter Allan <petermallan at gmail.com>
 To: Warner Losh <imp at bsdimp.com>
 Cc: "General Discussion: On-Topic and Off-Topic Posts"
 ? <cctalk at classiccmp.org>, Ethan Dicks <ethan.dicks at gmail.com>
 Subject: Re: Ultrix-11
 Message-ID:
 ? <CAJCrz55x935vV+O2=eoRyb2ythgQmRVGXx6HGZZFi8rjdv0TEA at mail.gmail.com>
 Content-Type: text/plain; charset="UTF-8"
 Thanks Warner and Ethan. That is very helpful.
 I had not realised that the partition sizes were REALLY hard wired - as in
 set in the code. That explains why there is no option to set the size at
 installation time.
 I will redo the installation with that in mind.
 Cheers
 Peter
 On Fri, 20 Aug 2021 at 22:03, Warner Losh <imp at bsdimp.com> wrote:

 On Fri, Aug 20, 2021, 2:26 PM Peter Allan via cctalk <
 cctalk at classiccmp.org> wrote:
  The idea of using an RA81 drive as it is bigger
sounds like a simple
 solution, but does it actually give a larger /usr partition? Even though
 an
 RD54 drive is not huge, most of it is not taken up by the root partition
 plus the /usr partition, but is available for use as (on the video at
 least) /user1.
 I will give it a try after the weekend and see what happens.

 I was going to try tonight. The dksizes.c table suggests that it is 10MB
 instead of 8.5MB on the RD54. Yet someone else said it was smaller, so I
 wanted to check....
 Warner
 Cheers

 Peter Allan
 On Fri, 20 Aug 2021 at 17:38, Ethan Dicks <ethan.dicks at gmail.com> wrote:
  On Fri, Aug 20, 2021 at 11:50 AM Peter Allan via
cctalk
 <cctalk at classiccmp.org> wrote:
> I just installed Ultrix-11 3.1 using the ultrix31.tap file from
> https://pdp-11.org.ru/files.pl?lang=en
> which is the location from the comments in Stephen's Machine Room  video
  on
> YouTube that I think started this thread.
>
> It installed just fine, but just like the video, I ran out of space on
 /usr.
 /usr was usually tight back in the day.
> How can I make a larger /usr partition? Is it possible to do this at
> installation time? There did not seem to be an option for this. Can  it be
 > done by using an additional disk? That would
seem likely, but not  what a
 > system manager back in the 70's or
80's would expect to need to do,
> especially as there is a relatively large amount of space left to  create
 > /user1.
 In the 70s and early 80s, it was not at all uncommon to have multiple
 disk drives mounted to add up to enough space, especially to put user
 files on their own device to keep them from competing with free space
 in the system areas.? Also, older, smaller disks were often cheaper
 than the newest/largest disk drives, or systems would be put together
 from repurposed hardware rather than purchasing new.? For a single
 data point, my employer bought a new RA81 in 1984.? For 424MB it was
 $24,000.? Most machines had a _lot_ less disk in those days.? Our main
 UNIX machine was an old 11/750 (2MB RAM) with 2x RK07 (28MB each).? It
 was quite a jump when I put Ultrix 1.1 on an 11/730 w/RB80.? The CPU
 was 30% slower, but it had 5MB of RAM and a 121MB disk, so as a
 machine that spent most of its time with a single user (me), it was
 fine.
 When disks were routinely 1-30MB (RK05... RK07 or RP03), it was
 totally common to have 2-3 disks on a machine.
 All that said, I looked over this install write-up and it seems to
 assume you have one disk and it slices and dices with default sizes...

 http://ftp.fibranet.cat/UnixArchive/Distributions/DEC/Fred-Ultrix3/setup-3.…

 I've installed older versions of UNIX where you had to explicitly set
 up disks and partitions (where you _could_ resize partitions).? Prior
 to restoring the contents from tape.? That didn't appear to be as easy
 with this installer script.
> I noted the options for installing software using soft links to other
> locations. Was that the preferred method when installing additional
> software?
 That was done, as was mounting an entire second disk for /usr.? One of
 the challenges is making sure you have enough tools accessible on the
 boot device to bring the machine up far enough to mount the additional
 devices.? This is part of why there are system tools in /bin,
 /usr/bin, etc.? You could depend on the contents of /bin being there
 before /usr was mounted.? Also, traditionally, programs in /bin were
 statically linked so that you didn't have to have specific libraries
 available at the time.
 The simplest solution, of course, is just get a bigger disk, but where
 that wasn't possible (which was most of the time), people did use soft
 links or multiple spindles to aggregate enough space to get by.
 Back in the day, I struggled to get enough disk space to install
 2.9BSD on an 11/24.? Two RK07s would have been a luxury.? I had an
 RL02 (10MB) and I think maybe an RL01.? I could get the initial
 restore to work but I didn't have enough space to rebuild my kernel.
 -ethan

 ------------------------------
 Message: 4
 Date: Mon, 23 Aug 2021 07:57:44 -0700 (PDT)
 From: geneb <geneb at deltasoft.com>
 To: cctalk at classiccmp.org
 Subject: Need Spectravideo SVI-328 parts....
 Message-ID:
 ? <alpine.LRH.2.21.2108230756300.23222 at sidewinder.deltasoft.com>
 Content-Type: text/plain; format=flowed; charset=US-ASCII
 I've got a very nice SV-328 that's had the sad misfortune of having the
 "K" key rather violently removed. (https://i.imgur.com/IxBIQTj.jpg)
 Can someone point me to where I could obtain a replacement key top and
 post?
 Thanks!
 g.
 --
 Proud owner of F-15C 80-0007
 http://www.f15sim.com - The only one of its kind.
 http://www.diy-cockpits.org/coll - Go Collimated or Go Home.
 Some people collect things for a hobby.? Geeks collect hobbies.
 ScarletDME - The red hot Data Management Environment
 A Multi-Value database for the masses, not the classes.
 http://scarlet.deltasoft.com - Get it _today_!
 ------------------------------
 Message: 5
 Date: Mon, 23 Aug 2021 17:29:08 +0100
 From: "Rob Jarratt" <robert.jarratt at ntlworld.com>
 To: "General Discussion: On-Topic and Off-Topic Posts"
 ? <cctalk at classiccmp.org>
 Subject: 3d modelling software
 Message-ID: &lt;00b401d7983b$ff929d50$feb7d7f0$(a)ntlworld.com&gt;
 Content-Type: text/plain; charset="us-ascii"
 I think I may need to get a small part 3d printed (some plastic board
 mounting guide rails from a PDP 11/24 H7140 PSU). What software is best for
 a novice? Preferably free!
 Thanks
 Rob
 End of cctech Digest, Vol 83, Issue 23
 ************************************** 