Did anyone notice this one? Might be a good deal for someone living nearby
with some friends to help out with heavy lifting.
Item: 5845564149
Looks like a lot of stuff.
Cheers,
Chuck
>
>Subject: Re: Cap reformation question
> From: "J.C. Wren" <jcwren at jcwren.com>
> Date: Tue, 06 Dec 2005 23:34:42 -0500
> To: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org>
>
>Sounds good. Last question (I think). Watt (!) constitutes
>low-wattage? 4W and 7W nightlights are easy to find. 40 watt oven bulb?
>
> --jc
>
>Allison wrote:
>
>> J.C. Wren wrote:
>>
>>> These are big mambo-jumbo caps in a linear supply, specifically a
>>> nameless S-100 system. I'm not sure if it's feasible to remove
>>> them. They're screwed into the motherboard, and while I could
>>> disassemble the motherboard from the chassis, it might still be a
>>> pain to get them out.
>>>
>>> Controlling the voltage into them is pretty easy, via the Variac.
>>> Limiting the current is a whole 'nother problem. Maybe a light bulb
>>> in series with the Variac?
>>>
>>> --jc
>>
>>
>> For that case yes. Variac to come up slow and low wattage lamp to limit
>> current.
>>
>> S100 linear supplies are unregulated (usually) before they get on the bus
>> so a load is NOT needed. Do insure the caps are discharged before
>> inserting
>> any board.
>>
>> Allison
Anything under a 20W appliance bulb initially. The lower the wattage the
higher will be the initial resistance and lower peak current.
Allison
Hey, any other Utah collectors on this list?
And speaking of geography, has the idea of creating a frappr map of
cctalk subscribers come up before?
<http://www.frappr.com/>
--
"The Direct3D Graphics Pipeline"-- code samples, sample chapter, FAQ:
<http://www.xmission.com/~legalize/book/>
Pilgrimage: Utah's annual demoparty
<http://pilgrimage.scene.org>
The Apple 1 went on eBay for $2550. Bryan, this should impress your wife.
Michael Holley
> Date: Sat, 17 Dec 2005 19:40:20 -0700
> From: "Bryan K. Blackburn"
> Subject: Apple 1 on eBay - shameless self promotion
>
> I interrupt this list with a short commercial message...
>
> I just listed a working Apple 1 Computer on eBay, item #8739750233 at:
> http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=8739750233
>
> This is a faithful recreation, nearly an exact replica, not an original.
> Really cool, just the same.
>
> -Bryan
On Dec 28 2005, 10:21, Christian Corti wrote:
> On Tue, 27 Dec 2005, Pete Turnbull wrote:
> > I think you mean Kevin Murrell's web page at PS8 Computing,
> > http://www.ps8computing.co.uk/PDP11/plessey.htm. Sadly, it's gone.
> > And I didn't keep a copy :-(
> http://web.archive.org/..........
Of course. I should have thought of that. Thank you!
--
Pete Peter Turnbull
Network Manager
University of York
On Dec 26 2005, 10:12, Jerry Wright wrote:
> I Have a 2 Plessey Boards for a PDP11 and I can
> not find much on them.
>
> - 701840 may be a tape controller
> - 703360 This is a Memory board
>
> There was a site with plessy info. but it seems to
> be gone. I beleive it was in the UK.
I think you mean Kevin Murrell's web page at PS8 Computing,
http://www.ps8computing.co.uk/PDP11/plessey.htm. Sadly, it's gone.
And I didn't keep a copy :-( I might have an email address for Kevin,
so I'll see if I can find anything.
--
Pete Peter Turnbull
Network Manager
University of York
[Firstly, excuse me for not taking part in the recent flame-pissing match.
I've been seeing valid points on both sides initially but can't accept any
of them any more due to the inconsiderate, impolite and unfair means they
were brought forward with. I can only second the following:
Chris M <chrism3667 at yahoo.com> wrote:
> I think it would be very unfortunate if the thing
> just died here and now.
Back to publicly frustrating myself with Sun vs. PC boot problems ;-)]
Dan Williams <williams.dan at gmail.com> wrote:
> I can't really help you directly, but I have had no problems booting
> sun machines from windows using vmware and virtual pc. I also have
> netbsd installed on simh vax, which I used to boot an octane a while
> back. I guess that cygwin would probably do the job as well.
> Unless you really want to spend time playing with open firmwire, it
> might be easier.
It's already been suggested, but I strongly dislike the idea of pileing a
virtual machine and another OS on top of it all on the PC side (a humble
P90, btw) when the functionality that I need could be actually realized by
*simplifying* what the Sun is doing. I'll rather spend that time with open
firmware, as you said.
der Mouse <mouse at Rodents.Montreal.QC.CA> wrote:
> > (...) Why does it have to obtain the machine's IP, that of the
> > tftp server and what else via rarp?
>
> It can't obtain anything but its own address via rarp. It normally
> gets its TFTP server's address via bootparams, I think, at least for
> older machines (newer ones may use something else for all I know).
> It's possible that it initially queries whoever answered its RARP, but
> if it gets no answer it broadcasts the query - and I think it
> broadcasts the TFTP request too if necessary.
Funny...I don't remember setting up a bootp(aram)d, I started getting tftp
requests as soon as the rarp table was setup. I also don't think the
requests were broadcast: I was running another machine ready to serve tftp
at the same time and that one didn't get any requests. I was even able to
shut down Linux after the rarp resolution (if tftp was disabled), bring the
same system up with Windows (under the same IP) and have the Sun slurp its
bootloader image from there.
> > I'm by no means a Sun expert yet, but as I've understood it, you can
> > define your own FCode commands and store them in NVRAM, so one could
> > modify the boot code to use parameters stored in environment
> > variables, either if a flag "use-stored-IP?" is set or as a fallback
> > if there's no rarp server around.
>
> Yes, except that the space available in the NVRAM is fairly limited as
> I understand it.
That might indeed be a problem, although not necessarily.
> > I've already got myself a Forth book and the FCode manuals from Sun,
> > and I had a look at some commands with "see". "see" however often
> > spits out hexadecimal codes in parenthesis amidst of Forth words and
> > I've yet to understand what they mean;
>
> They appear to be some kind of headerless something. There's one of
> the words internal to see that can deal with them - (see or some such -
> and you can use it as in
>
> ok see foo
> ... (f28470c0) ...
> ok f284709c0 (see
> ... that word ...
>
> (or whatever the internal word is - it's visible in "see see").
Yep, it's (see) - thank you. I may have tried that earlier but failed due to
not realizing this used postfix notation (contrary to see). It works and I'm
in course of building an indented listing of everything that happens after I
enter "boot".
It looks like I can initiating the execution of unnamed subroutine (f00...)
by entering f00... execute; any gotchas there?
Stan Barr <stanb at dial.pipex.com> wrote:
> I can't really help directly. Even though I've used Forth for 25 yrs and
> have both Power Mac and Sun machines here I've not done much with Open
> Firmware. You might try looking at http://www.openfirmware.org/ or
> http://playground.sun.com/1275/ and see if there are any useful links.
Thank you, those are quite promising resources; I think I've got something
to read over the holidays now... hopefully a few comments about how this
stuff is supposed to work.
So long,
--
Arno Kletzander
Stud. Hilfskraft Informatik Sammlung Erlangen
www.iser.uni-erlangen.de
Telefonieren Sie schon oder sparen Sie noch?
NEU: GMX Phone_Flat http://www.gmx.net/de/go/telefonie
The Apple 1 went on eBay for $2550. Bryan, this should impress your wife.
Michael Holley
> Date: Sat, 17 Dec 2005 19:40:20 -0700
> From: "Bryan K. Blackburn"
> Subject: Apple 1 on eBay - shameless self promotion
>
> I interrupt this list with a short commercial message...
>
> I just listed a working Apple 1 Computer on eBay, item #8739750233 at:
> http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=8739750233
>
> This is a faithful recreation, nearly an exact replica, not an original.
> Really cool, just the same.
>
> -Bryan
>
Re: More than 2 FDDs on a PC
I have a few (not sure how many, but several) PC 8-bit 4-drive Floppy disk
controllers. They have onboard FDC bios and support both 5.25 and 3.5 inch
drives. Some of them have I/O on them (serial/parallel). They are all new,
some in boxes, various models, some have diskettes (drivers), documentation,
cables, etc. If anyone wants one, I'll sell them for $12 each plus $6
shipping. As-is, I have no way to test them and they are old, but if one
doesn't work I'll refund or exchange (but you will be out the shipping
cost). I can send you more detailed specs (including photo) if you are
seriously interested (they are downstairs in the basement in a "bone pile"
and I'd have to go through them). Barry Watzman, Watzman at neo.rr.com
>Do remember there are no regulators in the PX8 PSU. The power supply must
>be close to 5V (4.8V is OK), not a random unregulated one. You may well
>do a lot of damage with the latter.
>
>
The standard adapter for the HX-20, PX-8 and PX-4 delivers 6 V DC at
600ma. If you use a regulated 6 V or lower power supply, the machine may
work, but batteries will not be charged. At
http://www.xs4all.nl/~fjkraan/comp/hx20/adapter.html you can find some
more info on proper power supply.
>-tony
>
>
Fred Jan
