On February 1, Tothwolf wrote:
> > http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=2000135437
>
> LOL...I passed up on about 30 of these at ~$5ea back in '98.
>
> Maybe that guy bought them? ;)
Now that's a deal I would have taken. $5/ea is pretty amazing.
-Dave
--
Dave McGuire
St. Petersburg, FL "Less talk. More synthohol." --Lt. Worf
Does anyone have a source for the drive belt for an Archive 2150S/2150L
tape drive? I've got 8 or so of these in various systems that need new
belts. I'd also like to find another 2150S (scsi version) if anyone has
one laying around.
-Toth
At 08:34 PM 2/1/02 -0600, you wrote:
> > Nope, those are 16 MB Non-parity.
>
>Are you sure? Count the chips and count the pins in the picture. Based on
>that, they look like 70ns parity modules. Of course, that could be a pic
>of some other simms, and not the ones up for sale.
>
>-Toth
http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=1328405102
Yup, Non Parity, 8 chips..... the parity chip ius missing at least on this
auction, the cincher is that these chips came out of Quadra 700
systems. Macs use non-parity ram....
Nope, those are 16 MB Non-parity.
I've dealt with Sunguk many times and he's a stand up guy, the 1 time I
got a bad Dimm from him for my sp[arc ultra he refunded the $ to me with no
problems.
At 11:29 AM 2/1/02 -0600, you wrote:
>On Fri, 1 Feb 2002, Doc Shipley wrote:
>
> > Some reseller on eBay evidently brought out his stash - he's selling
> > several hundred SIMMs in lots of 4. He seems to have a lot of
> > complaints - 197 negatives of 4900 feedbacks - but $15 for 64M ain't a
> > bad gamble....
>
>Of course, 4900 feedbacks is alot too. From the picture, the simms look
>like 70ns parity ram, but since the picture is off center, and he states
>they are 80ns, the only way to know for sure would be to ask him. 70ns
>parity modules could be used in many computers besides a Mac, but 60ns
>would be much better for mid to late 486 and early pentium PC type boards.
>
>-Toth
I need the jumper settings. The base card has 2 3-pin jumpers, J4 and
J5. J4 is labeled A and 9, and J5 isn't labelled. The daughtercard has
2 18-pin (I think, maybe 20-pin) DIP sockets, labeled AUI & BNC, and the
AUI socket has a DIP module that looks like a straight jumper block.
I've got OS 7.1 installed, and "Ethernet Inside" sees the card, but it
fails all tests.
I'm not willing to go for the "hosed" option yet. And no, of course
there's no part number anywhere. It has a right-angle PDS pass-through,
what looks like an empty FPU socket, and AUI & BNC connectors.
Thanks,
Doc
Yup! Moved the 80col card to slot 3 and Bob's yer uncle. WS &
Supercalc look MUCH better.
No BNC's used or harmed in the making of this message, btw :
3 RCAs on Apple (40/80/RF), RCA on 40/Colour monitor,
UHF on 80/Mono monitor, F59 on TV.
:-)
Date: Thu, 31 Jan 2002 20:50:53 -0700
From: "Richard Erlacher" <edick(a)idcomm.com>
Subject: Re: 80 col Apple ][
So, did that fix your problem?
Dick
>>I had an Icom Attache, made by Pertec. It was basically an Altair 8800bt
>>(Turnkey), with an integrated keyboard and video capabilities. It was in
>>a
>>nice case, kinda like a large Apple II case (which it was desinged to
>>compete against). Composite video output used a BNC connector.
>That's a system I've never seen. do you have a picture? What sort of
> >video
>(pixel format) did it produce?
Well,
They key is that I HAD the system. The manuals and system are now somewhere
in France after being an eBay "Auction for America" (Yah, I know, it's where
the money goes, not necessarily the item...). I don't recall off the top of
my head what the technical specs on the video were. It was extremely hard
to let it go, but my sacrifice was NOTHING compared to the sacrifice of the
people who received the money.
The video was a wild arrangement, where basically the rest of the computer
assumed it was talking through a serial link. The video board (actually two
board bolted together) hooked up to a serial port, and also to the keyboard.
It converted the keyboard input to serial characters, so the computer
thought it was getting input from a terminal. The video board(s) also
converted the serial output of the computer to composite video. This
allowed them to use MITS boards, unaltered, and run with them....
I have pictures, and will dig them up soon...
Rich B.
_________________________________________________________________
MSN Photos is the easiest way to share and print your photos:
http://photos.msn.com/support/worldwide.aspx
On Feb 1, 17:31, Gunther Schadow wrote:
> I read a web article the other day where the guy describes the
> various forms of the Qbus and he also said that you could fry
> certain cards when you stick'em in a wrong version of the Qbus.
> Since I have a uVAX II and a PDP11/03 I would want to know if
> I can mix and much cards with thoese busses or if I would fry
> a K[ZF]QSA board sticking it into the wrong bus.
There are two possibilities here. One is that there are board sets such as
the RLV11 controller which use the CD-interconnect to talk to each other,
and those won't like being in a serpentine backplane, where both A-B and
C-D carry Q-bus signals. They're designed to be used a a straight
backplane, where the Q-bus is only on A-B, and the lower side of each C-D
is connected to the upper side of the next C-D row down. The other
possibility is that some backplanes (notably some Plessey ones) have
battery voltages or occasionally even AC voltages on the "spare" pins and
they may fry boards that expect signals there rather than a power supply.
> Also, why was the need for grant continuity cards an advantage?
Well, a better way of looking at it is that there's a design feature which
is advantageous in providing prioritisation of interrupts according to
position relative to the front (processor end) of the bus, but the penalty
is that you need grant cards as a result. It's the interrupt chain. In
-11 busses it's designed so the chain passes through each device, and
therefore any device can be built with the capability of locking out
devices behind it while it's being serviced. Anything further away will
wait until the locking device releases the interrupt, then it's own request
will automagically be seen by the processor. There's no such scheme in an
Omnibus, as the signal goes "past" each card rather than "through" it.
> The OMNIBUS didn't need it but the UNIBUS (and Q-bus?) do.
> Also, what's the deal about grant continuity cards, they seem to
> just have a few lines shorted. In the UNIBUS box next to my
> VAX 11 it has some intermediary open slots but only one grant
> card plugged in. How could that work?
The grant cards only need to carry the interrupt request and NPR lines;
these are the only ones that have an IN and an OUT on each slot. Other
signals just daisy-chain the slots together like a busbar in a power
distribution panel. The other way is to use a wirwrap on the backplane
between the IN and the OUT. The NPR line is often dealt with in that way,
and G727 grant cards actually only jumper the four interrupt lines (G7272
jumpers NPR as well).
There are a few reasons you may only have grant cards in some slots. It's
quite possible that something has been removed and nobody put a grant card
in even though they should. It may well work like that, if nothing further
back actually needs the signals. Another possibility is that you're
looking at some custom backplane which doesn't have standard SPC slots --
not all Unibus backplanes are wired the same way -- though I can't think of
one that has SPC in some slots and custom wiring in others. No DEC one,
anyway.
> Also, why can you stick
> 1x or 2x cards into the different sections, is there a difference
> where you put them? Why is the feed to the UNIBUS only a 2x card
> and where must you plug that? Is it magic?
The Unibus signals fit onto two rows, A and B. On a normal expansion
backplane, some of those signals are redistributed onto rows CDEF as SPC
signals, so in effect you have two busses side by side -- Unibus (or MUD :
Modified Unibus Device) in slots A and B, and SPC (Small Peripheral
Controller, same signals more or less, but different arrangement) in CDEF.
You can fit a dual-height Unibus card in rows AB, and/or a quad-height SPC
card in CDEF, or a hex card in ABCDEF.
If you really mean single-height (only one slot) or dual-height when you
write 1x or 2x, those are usually cards which are parts of some device
built from simple(ish) logic modules; they're not Unibus or SPC cards, and
generally fit into specific places in a specially-wired backplane where
only A+B of the first and last slot are Unibus. The rest are some custom
point-to-point wiring for a particular device, built from simple modules.
--
Pete Peter Turnbull
Network Manager
University of York
> -----Original Message-----
> From: Ben Franchuk [mailto:bfranchuk@jetnet.ab.ca]
> > Remember that it takes a relatively old OS to boot a 512k mac.
> I still remember reading how to upgrade your mac to 512k from
> 128k. The
> old solder on new chips over the old ones trick.
I recall the same kind of trick for a color-computer 1. :) In
that case, it was supposed to give you extra capacity above the
supposed 64k maximum. No idea how it was addressed. It could
be that my memory is cloudy and it was an upgrade _to_ the 64k
maximum.
I seem to remember, for some reason, the upgrade got the thing
up to 96k or some odd number like that.
Of course, this is a vague recollection from an article in a "Hot
CoCo" magazine a while back, so may not be completely accurate.
Or it may be way off. The only part that I recall with clarity
is that one was required to solder new chips on top of the old.
Chris
Christopher Smith, Perl Developer
Amdocs - Champaign, IL
/usr/bin/perl -e '
print((~"\x95\xc4\xe3"^"Just Another Perl Hacker.")."\x08!\n");
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