>>> Check out ebay auction 190467284114 and you can clearly see there are
>>> DIP64
>>> MC68000 CPUs going to the scrapper bin.
>>> This is painful to see especially knowing the S-100 68K CPU board is
>>> entering build and test. I know builders will be looking for these parts
>>> soon.
>>> The DIP64 68000 CPUs are still available though this seems like such a
>>> waste
>>> to scrap classic ICs. I think it is tragic.
>> Andrew, Am I wrong, or the 68000 IC is a **very common** microprocessor?
>> :oO
> They could easily be sold for much more than the value of the metal
> recovery. eBay has them going for $8 to $50 or more each. Also amateur
> gold scrappers have a nasty habit of making a mess with their chemical
> waste.
E-bay pricing can be bizarre and I would argue is not always
representative of the "real world". Jameco lists
Ceramic DIP64 68000 (pulls almost certainly) for $9.95 and
I would expect them to work.
Jameco used to have early dynamic DRAM's and shift registers
By the metric buttload (e.g. 1103's, 2504's) presumably pulls but
In other cases maybe a little closer to "floor sweepings for hobbyists".
Having worked with 1103's I would argue that by modern standards
Even the "cream of the crop" were little above floor sweepings.
Tim.
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
I have a critical ( late 80's microprocessor controlled ) piece of test gear
no longer supported. The power supply is dead and after sawing through it's
exoskeleton I was meet with a large epoxy block the size of the original
box. I don't intend to fix said power supply but rather to figure out what
voltages it provided and use a modern switcher. I know I need +12 and +5 as
there is a generic floppy drive and the logic / processor uses +5. Any ideas
how to strip the epoxy other than digging through it with implements of mass
destruction ? Any and all help is appreciated.
Best regards, Steven
> I was once buying some 2114s from Jameco and got a bad
> batch. I contacted them and they told me how they work.
> First, if it is known to be pulls, they state that up front.
> Most of the older chips are from stock rooms of companies
> that are clearing older stock or have gone out of business.
> As such, the parts are untested. They could have been bad
> parts from a production line that someone was collecting
> or just some NOS. They have no way to test them.
Just my two cents: I would generally rather have pulls, than
new or old stock of unknown origin.
The pull was likely taken from a working system. The old stock of
unknown origin..., well, who knows? After the electrolyte
debacle of a few years back I am much more picky about
electrolytics (known brand, known lot and
manufacture date, and especially traceable lineage
back to manufacturer as a result of counterfeiting)
than with semiconductors!
I generally expect a "usual distributor" (e.g. not Jameco) to
be selling me new good stuff with paperwork and packaging
traceable back to the manufacturer. Jameco... well they're
many steps up from Poly Paks in quality and customer service
but still I order a couple of spares :-).
Tim.
I picked up one of these cases not too long ago:
http://cgi.ebay.com/Vintage-Magna-External-Drive-Case-and-Power-Supply-/150…
Could someone give me the scoop on the ports on the back? One looks
like a typical db-25 scsi. What's the other one, the one with three
rows of pins? Is this another type of scsi port?
brian
Hi guys,
(If you previously emailed me about the DiscFerret, you'll already have
received a copy of this message... in which case, apologies for the
duplication...)
I now have a final price list for the DiscFerret, after having spent the
week arguing with suppliers over leadtimes, MOQs and prices. I've given
up on this process, and have instead adopted the highly scientific
method of "order the blasted things from DigiKey."
This leaves me with the following price list:
Bare board: ?22.50
With TPS75003 mounted: ?27.50
PCB + tested PSU + PIC soldered/programmed: ?49
Fully assembled and tested PCB: ?129
Power supply (*) ?27.50
Postage to the USA for a single unit will be ?7.50 for normal airmail,
or ?12.50 for an insured and tracked service.
(*) The power supply is a PowerPax 12V 3.8A "soap on a rope" type
switch-mode PSU. It can power the DiscFerret, and a disc drive with a
power requirement of 5V 1.5A and 12V 1.5A. The fairly high price is due
to its weight: a 36W PSU is not a light beast, even in switch-mode form!
You will need to supply a suitable mains input lead (figure-eight
tape-player power lead; available from most electrical retailers).
Cables
======
By default, the DiscFerret includes a 40-to-34-pin IDC cable for a 3.5in
disc drive, and a power cable terminated in a Berg connector (the type
used for 3.5in disc drives). If you need a different cable (e.g. for a
5.25in drive or both 3.5 and 5.25), ask me for a quote.
I'm quite happy about getting the price down to ?129. It's taken days of
futzing through the Farnell catalogue to find suitable parts at decent
price points (curiously some of the name-brand parts are cheaper than
Farnell's Multicomp own-brand parts), but I finally got there in the end.
So what now?
============
Well, you guys let me know what your final orders are. I have four
Revision 0I06 (September 2010) boards and the six 0J28 (October 2010)
boards from Gold Phoenix. There are a few rules as to allocation:
- If you're ordering a bare board or a board with some (but not all)
parts pre-mounted, you'll get a Rev 0J28 because these are easier to
solder (immersion silver plated finish).
- If you order a ready-built unit, you'll get a random choice between
0I06 and 0J28.
There is no software-detectable difference between 0I06 and 0J28. The
main difference is that 0J28 adds pads for a USB current limiting
resistor, which is added via an ECO modification ("greenwire fix") on
0I06. 0J28 needs a greenwire due to a mistake in power routing, but does
not require any track cuts (unlike 0I06).
If you order a built-and-tested unit, rest assured that you will receive
a board which has been updated to the latest ECO level at the time of
manufacture.
How to order
============
1) Send me an email with a list of what you want to order, including
quantities.
2) I'll send you a PayPal invoice for the total. If you're in the UK or
Europe and would prefer to pay by BACS or SWIFT transfer, please let me
know and I'll send you the relevant details. The payment must be in
British Pounds Sterling, *NOT* Euros (my bank doesn't allow incoming
transfers in anything other than GBP). Other payment methods may be a
possibility -- ask me, I don't bite :)
3) When you pay the invoice, select "Include shipping address", and
enter your desired address. This will need to be a Confirmed address. If
you're paying by BACS or SWIFT, email me your name and address.
I'm going to be assembling a couple of boards tomorrow as a time-trial.
Assuming all goes to plan, the first units should be shipping towards
the end of next week.
I'd like to thank everyone on Classiccmp, VCForums, and so on for their
assistance, comments, criticisms, sharing of expertise, support and so
on. Seriously, you guys rock.
Thanks,
--
Phil.
classiccmp at philpem.me.uk
http://www.philpem.me.uk/
Hi everyone,
I'm thinking about making punched cards. I could need some information about the material used for
them. Precise information about tolerances, specifications, references to more information, and so
on would be quite helpful.
Best wishes,
Philipp
--
http://www.hachti.de
I have a Needham EMP-30 chip programmer. I've been keeping an old Pentium
(mumble) computer around to drive it (vaguely on-topic since it's
definitely more than 10 years old). It has a parallel port interface.
I would like to replace the ancient behemoth computer with a notebook to
save space. I would also like to buy a modernish laptop to run things
like FPGA and Microcontroller development/interface systems.
I'd like them to be the same laptop, so right there I'm looking at USB and
parallel port on the same notebook.
Looking around, that does not appear to be available in new products.
Ordinarily, I don't shy away from used equipment (who does, on this
list?), but for notebooks, with their breakage issues and such, I would
prefer to buy new.
Further shopping revealed that Dell sells a Legacy Port Expander which
works with some of their current notebooks and provides serial and
parallel ports. And I think I've read somewhere while searching that the
Needham software will work with Windows XP (could be mistaken, need to
search again).
Do any of you know if chip programmers (the EMP-30 specifically) work okay
with the parallel ports in port expanders? How about the Cardbus (or
whatever is replacing it) parallel port cards?
Alternatively, anyone go through this exercise already and pick out what
seemed like the ideal notebook model with USB and parallel ports. I might
consider a used model if someone has a strong recommendation.
Thank you for any discussion,
Jeff Walther
Hi guys,
I've got a batch of DiscFerret PCBs for sale. These are the first-cut
boards, and work fine but for one requirement: you need to cut a track
and install a 160k to 220k resistor over the break. C6 is missing the
"+" polarity marker, though this is on the printed component layout
(somehow it got missed off the silkscreen print).
I'm happy that the design works, and any parts you need should be
available from Farnell or DigiKey (or Mouser, but you'll need to get the
FPGA from DigiKey). Soldering can be done with nothing more complex than
a decent soldering iron, solder, desolder wick and a good magnifier. A
PCB holder or Panavise and some paste flux would be very useful, but not
essential.
These boards are RoHS-compliant, two copper layers on a 1.6mm FR4
substrate. All vias and holes are fully plated-through, with a green
solder mask and a white component layout print on the top side. They
were manufactured by EuroCircuits BVBA (www.eurocircuits.com), and have
been checked visually for damage or manufacturing issues.
Cost is ?45 per board, plus shipping (which is likely to be very
little). This does not include any parts, just the bare board, a printed
component layout, a copy of the Bill of Materials and a copy of the
Service Note which covers the track cut and .
There are some extra options available:
- TPS75003 chip pre-mounted. Add ?5 to the total. This includes a
full electrical test (shorts and opens).
- PIC microcontroller soldered down and pre-programmed. Add ?5. This
includes programming the bootloader into the PIC, and means you won't
need a PIC programmer to bootstrap the DiscFerret.
- Both of the above -- add ?9.
- Fully assembled and tested power supply section -- add ?25
- Fully assembled and tested PSU, with PIC pre-soldered and
programmed: add ?29.
Any parts I install will be soldered down with Multicore RP15 solder
paste. This is a 96SC-alloy (95.5% tin, 3.8% silver, 0.7% copper)
RoHS-compliant lead-free solder paste with a No-Clean flux. If you
decide to remove a component and replace it with 60:40 SnPb solder, then
desolder the existing part, remove all solder with desolder wick
(Chemtronics Soder-Wick works nicely for this), then re-tin the pads
with 60:40 solder, remove that solder, then install the part.
If you'd like any other components supplying or pre-mounting, please
email and ask for a quote. I'm not going to start doing fully-assembled
boards until I get the next batch of boards in stock (hopefully this
Friday).
Basically, the production boards will be from the "0J28" batch, which
has a number of part placement differences. These differences render the
solder paste stencil for the 0J28 useless for the 0I06... No paste mask,
no mass production. Making a DiscFerret using hand soldering techniques
takes nearly a day -- with solder paste and a reflow oven, a couple of
hours at most.
There is no firmware difference between 0I06 and 0J28 boards: you can
use the same FPGA microcode and PIC firmware; the only differences are
in component placement (0J28 was redesigned to meet the Gold Phoenix
7mil design rules) and that 0J28 includes pads for the 160k resistor.
To order, send me an email (this address is fine, or change the
user-part from 'classiccmp' to 'philpem' to get my main mailbox) with:
- Your name and address (I'll assume the From and Reply-To are set
correctly in your mail client!)
- What exactly you want to order
I'll send a PayPal invoice for the total amount, and will send the
boards out when the invoice has been paid. I usually assemble boards
during the week, and post them out on Saturdays.
For UK customers I'd advise going with Special Delivery due to the cost,
and "Airsure" for international orders. If, however, you'd prefer I send
them First Class or Airmail, I'll do that as long as you agree not to
come after me for a refund if they get lost in the post...! (First Class
and Airmail are uninsured)
Thanks,
--
Phil.
classiccmp at philpem.me.uk
http://www.philpem.me.uk/
Check out ebay auction 190467284114 and you can clearly see there are DIP64
MC68000 CPUs going to the scrapper bin.
This is painful to see especially knowing the S-100 68K CPU board is
entering build and test. I know builders will be looking for these parts
soon.
The DIP64 68000 CPUs are still available though this seems like such a waste
to scrap classic ICs. I think it is tragic.
Andrew Lynch
