>> Not sure why you have VARCHARs for primary keys, why not use the
>> conventional auto-increment int so you can dispense with
>> the LastGeneratedArtifactID table.
>>
> Because my artifact ID's are not always just numbers. In some cases
> they may already be marked on an artifact (though typically not for
> manuals - but this is just the first of a set of such projects, and they
> *are* marked on many of my computer boards).
You can still force the artifact ID VARCHARS to be unique, and index them as
well, of course. There are at least a couple of reasons to have primary
keys that are independent of the "visible" key. First, if the user-visible
key ever changes (what if the inventory tag falls off and is lost?), that
will break all the links that refer to that record (or else you'll need
extra code to handle this). Also, there have been many times when some
aspect of a key that's directly tied to an external bit of information needs
to change format - numeric to character, or length change, or... This too
will break things.
> No, I don't need made up primary keys. The other tables have the keys
> they need to guarantee uniqueness - in some cases the PK is made of up
> two or more columns. I seriously dislike the current fad of inventing
> such keys when they are not needed.
I too used to develop new databases this way, figuring that since a certain
bit of information is guaranteed to be unique (or that I want to guarantee
its uniqueness), I'd use that for the primary key. After getting bitten
more times than not, I now almost always create an auto-number key whose
only purpose may be for internal linkage.
(I recently developed a project using Zoho Creator, which was a learning
experience to say the least. It's worth noting that an explicit ID field is
part of *every* data table that you can create there - there's no way around
it. And, it turned out that it was pretty darn helpful a lot of the time,
too.)
>> Another thing, although MySQL is fine but for this I think SQLite might
>> be a better choice of db. Its access methods are all in-process ie. no
>> external
>> dbms service to bother with, just a library to link in and the physical
>> database is a disk file (.s3db extension). It has a much 'lighter' db
>> footprint.
>>
> As I mentioned in another response, I truly dislike SQLite, based on my
> experience with it on my Garmin GPS.
I'm still not sure why - my experience has been very good. What bad
experiences have you had?
~~
Mark Moulding
Hi all --
I've been working on getting a Xerox 1186 workstation up and running
again, using the floppy images on Bitsavers. I have the "Medley"
Interlisp-D software installed (after writing out and installing from
~25 floppies) and running and I'm attempting to load in the related
libraries and software (another 10-20 floppies or so). Some of these
libraries have dependencies on various font files, which I do not seem
to have and haven't been able to track down. I see vague references in
the documentation to a floppy disk set labeled "Display Fonts" but these
do not appear to be on Bitsavers.
From writing out a few floppies and looking at their contents on the
1186, I do not believe that these have any relationship to the Viewpoint
Font disks (though if anyone knows differently, do let me know).
Anyone out there have any experience with this? Anyone happen to have
these floppies and/or images of them?
Thanks as always,
Josh
Anyone out in CALI (I think he said Santa Cruz) who is looking for a very
nice condition Flexowriter with desk. I wish I could take it, but I have a
moratorium on new stuff for a while. It's museum quality.
Email me privately for more info. I have only seen the pictures, don't know
the guy who contacted me to see if was interested (and also willing to buy
it), but before it goes on Ebay someone here might be able to snag it.
--
Bill
vintagecomputer.net
I've seen the discussion here about sources for old IC's, ones that are
out of production, mainly the DEC buss interface chips.
Are there places where old PC cards can be found? I mean besides ebay.
I'm looking for ISA interface cards that were for Bomem spectrometers,
they are probably 20-25 years old.
(Months along, posts to several boards / lists, still no help on this one..
so I'm giving it another shot. I'd really like to use this board)
Been trying to no avail to find any info on this 'MCT' S-100 serial card.
I'm pretty sure the card works, as it came from a previously-working system
- but all documents are missing, and without the info, I have no idea how
to put it to use. Photos are here:
https://nerp.net/~legendre/altair/mct_serial_01.jpghttps://nerp.net/~legendre/altair/mct_serial_02.jpg
Other than what I believe is an artwork / batch number on the rear, the
only marking is "Assy 105510" on the front silk screen. My hunch is that
this may have been a fairly generic 'OEM' type card which could have been
re-badged and sold under one or more different names. So perhaps the docs
exist under a name other than MCT?
Any help greatly appreciated - thanks!
-Bill
The terminals are models 3472 and 3477.
The keyboards are Model M.
The server is a 3174-11R
He did not give counts.
Cindy
---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus
Hello all,
I have a BeBox 66mhz that is missing the front plastic parts and the IO
riser that has all the ports on it.
By any chance does anyone have these parts available for sale?
- Ethan
--
Ethan O'Toole
Is anyone interested in IBM terminals from roughly 1985-1989? There is a
complete system, probably no keyboards. Located upper Midwest US.
Cindy Croxton
---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus
> From: drlegendre
> I'm not sure what you're describing. Can you link to a pic of one of
> these caps?
http://www.electrical4u.com/images/glass-capacitor.jpg
> From: tony duell
> Incidentally, what are you using those capacitors for?
I'm taking a half-filled QBUS memory card and filling it.
> Why not some other type?
Because on that board, they fitted _underneath_ the DIP sockets,
and nothing else will fit down there!
> I am pretty sure they are not polarised, you can fit them either way.
> In general capacitors under 1uF are not polarised
> ...
> Anything over 100uF is very likely to be polarised.
Thanks, help much appreciated!
Noel
Henk,
Congrats! What a buy. Gorgeous super-clean machine.
The Juki looks almost like a copy of an IBM 029, down to the angled styling
and stacker section.
Except of course for the color.
Marc
============================
From: Henk Gooijen <henk.gooijen at hotmail.com>
Subject: Re: IBM 026 - Decision Data 8010 card punch on Ebay in
Germany
I picked up the Decision Data card puncher last Tuesday. Heavy stuff!
I helped the seller move the orange colored card punch. It's a Juki.
Also *very heavy*. BTW, the keyboard of the Decision Data puncher
is connected with a cable; you can move the keyboard to a comfortable
position. IIRC, the keyboard of the Juki is fixed placed on the desk.
- Henk, PA8PDP