While preparing the paperwork for some donations to the Computer History
Museum, I started wondering about appraising the artifacts donated for tax
write-off purposes. Who would qualify as an appraiser of classic computer
items? I think I'm a pretty good candidate given the time I've spent
selling the stuff on Ebay. Is this something I should run by a lawyer?
--
David Griffith
dgriffi at cs.csubak.edu
A: Because it fouls the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing in e-mail?
All --
I?m finally getting around to building the JS-1 joystick replica and
using a D+7A board I got a few months ago. I have the JS built but now I?m
trying to recalibrate the board per the instructions on page 4 and I?m
having trouble getting it to read the right values.
The calibration procedure, basically, starts with putting 2.54v on an
analog input and using a short program to read the input and display it on
the front panel output port of my IMSAM. There are two problems. When
reading the A/D and displaying the input, bit7 is stuck ON. The second
problem is that I can?t get the input to read the maximum positive of 7Fh
(excluding the seemingly stuck bit7).
The version of the schematic I downloaded isn?t a very good scan, and
doesn?t seem to be the same revision as my board (because the adjustment
pots have different reference numbers). There are a few common chips that
touch bit7 (like the LS367) which I can swap, but the others, like the
AM2502 successive approximation converter, isn?t as common.
So before I go swapping chips, does this board have any common failure
mode I should be looking for?
Thanks!
Rich
--
Rich Cini
Collector of Classic Computers
Build Master and lead engineer, Altair32 Emulator
http://www.altair32.comhttp://www.classiccmp.org/cini
> Date: Wed, 6 Jul 2011 23:39:14 -0400
> From: mcguire at neurotica.com
> To:
> Subject: Re: free-open source PCB autorouter software development
>
> On 7/6/11 7:03 PM, Andrew Lynch wrote:
> > You've missed the point entirely. Yes, gEDA includes a PCB layout
> > tool (PCB) which includes an autorouter. However, they are closely
> > coupled and if you want to use the PCB autorouter you must start with
> > gEDA EDA tool set and stay with it.
>
> This is not correct! While there is a well-developed integrative
> path between PCB and the gEDA suite, it is NOT necessary to do all of
> your schematics in gEDA in order to use PCB, nor is it necessary to use
> PCB for your board layouts if you use gEDA for schematics/BOM/etc.
>
Hi,
gEDA is a fine EDA tool set. PCB is a great stand alone PCB layout tool that includes an autorouter. Agreed. However, if you are going to use the PCB autorouter you must use PCB for your PCB layout. For example, how does one get their PCB layout into PCB to use its autorouter if you uses KiCAD, FreePCB, or Eagle? There is no interchange standard AFAIK.
I think we've lost focus on the original topic of this thread so I will repeat it. If you are a software developer with familiarity with EDA and are able to help develop a truly free/open source PCB autorouter this is a great opportunity to help the hobbyist EDA community. This is desperately needed IMO.
Hobbyist PCB autorouters are either non-free or lack support of interchange standards. QAutorouter has promise to open up free/open source PCB autorouting to all the hobbyist EDA toolsets that support Specctra DSN export and SES import such as KiCAD, gEDA, FreePCB, and Eagle.
Please consider. Thanks and have a nice day!
Andrew Lynch
-----BEGIN PGP SIGNED MESSAGE-----
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Hi All,
I'm working on a project here
http://sourceforge.net/projects/qautorouter/
It is an auto-router that is written in C++ on Qt application framework,
reads/writes specctra file format and uses a plug-in style of interface
for the router engines.
It is very alpha at this stage, I have much of the UI, file I/O, and the
plug-in API operational. I am working on a "Simple Router" plug-in at
the moment that is implementing a simplified version of the expanding
box algorithm. The Simple Router will be used as a sort of template for
debugging the plugin-api and as a template for developing more
sophisticated plug-ins. Toporouter would be a good one.
In any case, it would be great to get a few other people on-board, a
developer or two that is quite proficient in C++ would be very helpful,
some hands-on with Qt would help a lot too.
Someone to look after the Windows(tm) and Mac OS-X build and release
would be very helpful.
Someone to help with packaging; windows installer, Mac OSX installer,
and linux .deb, .rpm packages would be helpful as well.
If you're interested, please just send me a little about what you can
contribute, and your sourceforge id.
Kind Regards,
Mike Sharkey
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curently spending an hr a day scanning heathkit h11 manuals so far scaned 4
seconds of the software referance manual if anyones interested
http://pointdouglas.com/SEBHC/H11/?M=A
>Message: 17
>Date: Fri, 08 Jul 2011 01:28:43 -0500
>From: Joe Chisolm - Gmail < jchisolm6 at gmail.com >
>Subject: Re: appraisals
<snip>
>The 501(c)(3), in this case the CHM, should give you paper work that
>describes the donation and the value of the donation. ?A few years back
>the IRS issued rulings that said you could no longer just "claim"
>donations. ?You have to have the paper work from the 501c3 org.??
When I worked in Anthropology at the Field Museum in Chicago, we would give donors a letter stating receipt of the donation, but we did not asign a value to the donation. The donor had to get that from a third party appriser. Most other museums that I am familiar with have similar policies (which might even be a part of the tax code).
Bob
All,
I have rescued two 3B1s and there are more available.
Please post here if you are interested.
I would like to post in other forums like
http://www.3b1.info/
but can't find out how to post.
Thanks,
Keith Stanley
On Tue, Jul 5, 2011 at 8:30 PM, Andrew Lynch <lynchaj at yahoo.com <http://www.classiccmp.org/mailman/listinfo/cctalk> > wrote:
> Copied from KiCAD-users mailing list. Hobbyists have long needed a
> free/open source PCB autorouter for their EDA tool suites. One is now in
> development. Please support this project. This is not my project but one
> I
> strongly believe is very good for EDA hobbyists. Certainly useful for
> KiCAD
> and maybe gEDA as well.
>
>
Hi Andrew,
There's this one for gEDA which has been around for several years.
PCB, http://pcb.gpleda.org/news.html
And it's available on sourceforge, http://sourceforge.net/projects/pcb/
And you can track the progress here, https://launchpad.net/pcb/
Why reinvent the wheel ??
They could probably use more coders to support this.
=Dan
-----REPLY-----
Hi Dan,
You've missed the point entirely. Yes, gEDA includes a PCB layout tool (PCB) which includes an autorouter. However, they are closely coupled and if you want to use the PCB autorouter you must start with gEDA EDA tool set and stay with it. There is no import/export capability so if you use KiCAD, FreePCB, EAGLE, etc then you are out of luck. This is the "lock in" which plagues the whole EDA technology because there are few if any interchange standards. There is no way to import/export PCBs in/out of gEDA AFAIK, at least from KiCAD. I can't tell if gEDA supports Specctra import/export necessary to use FreeRouting.net but doesn't appear so.
QAutorouter is a *much* better approach of decoupling the autorouter from PCB layout tool. Any EDA tool set that can export Specctra DSN and import Specctra SES files can use QAutorouter. Also since it has an API which allows multiple different free/open source autorouters to "plug in" the hobbyists can potentially use MUCS-PCB, Topological Autorouter, the gEDA PCB autorouter, the KiCAD autorouter (yuck), or new autorouters. Really the PCB layout tool and the PCB autorouter are so different they *should* be separate tools. Integration just leads to yet more EDA "lock in".
Personally, I won't even consider gEDA since I have 50+ complete boards in KiCAD format. KiCAD is not perfect by any stretch but it supports at least some level of EDA interchange standards (Specctra at least).
http://en.wikipedia.org/wiki/Comparison_of_EDA_software
Thanks
Andrew Lynch
Hello. Looking for a Franklin high speed digital printer, these were made in the 1960's and early 1970's.
The printer is a rack mount unit, and prints on adding machine width paper.
If you know of one, or even any information or manuals I would be extremely grateful for the help!
I have more information on the unit if anyone can help.
Best regards :)
Walter
