Hi All,
Just thought I would ask for some help - are any text based groups
still available?
About a year ago, my ISP dropped support for newsgroups. I was about to
access the only 2 newsgroups I care about via my local university. However,
that was recently dropped as well. I only use 2 newsgroups:
alt.sys.pdp11
vmsnet.pdp-11
Does anyone still allow access? READ ONLY is acceptable, although I
would prefer to be able to may a post a couple of times a year.
Sincerely yours,
Jerome Fine
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Hi Tony and all
I get the digest, so this mystery might be solved by the time
you read this...
>Enough to form a pool on the floor under the table on which the set was
>placed. And it would come back after being cleaned up.
Check the antenna :-)
Water leaking in at the top and running down the coax.
W
--- Richard A. Cini wrote:
>
> Yes, from your description and some searching,
> that's what it is. Can anyone
> tell me what was supposed to go in the D8 socket?
> All of the pictures I've
> seen show that socket empty.
Anything you want. An Apple with Integer BASIC
firmware typically had one or two sockets open for
additional ROM programs or utilities. IIRC, the only
popular one was the 'Programmer's Aid' expansion ROM.
When the Applesoft firmware took over the Apple world,
it gobbled up the whole 10K ROM space beneath the
monitor so that was the end of that. A shame.
Fortunately Apples don't require Applesoft to be
useful.
> If anyone has a scan of this manual handy I'd
> appreciate getting a
> copy. Thanks!
I've never seen the manual. The wonderful book,
"Understanding the Apple II" covers the Firmware card
and even provides instructions for some useful hacks
like F8 ROM selection. You can find it in the online
manuals section of 1000bit under the Apple heading.
www.1000bit.net
Liam Busey
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Sorry did not look at the return address, this should have been off line.
----- Original Message -----
From: "Keys" <jrkeys at concentric.net>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk at classiccmp.org>
Sent: Tuesday, July 18, 2006 8:42 PM
Subject: Re: Thanks for the Donations
> ----- Original Message -----
> From: "Robert Ollerton" <rollerton at gmail.com>
> To: "General Discussion: On-Topic and Off-Topic Posts"
> <cctalk at classiccmp.org>
> Sent: Tuesday, July 18, 2006 9:06 AM
> Subject: Re: Thanks for the Donations
>
>
>> How much short on money are you?
>>
>> I would like to make sure the sds910 gets rescued.
>>
>> Bob
>>
>> On 7/17/06, Keys <jrkeys at concentric.net> wrote:
>>> Thanks to all that have sent help in the form of money or labor offers
>>> for
>>> the two large rescues I have going on soon, but we did come up short on
>>> the
>>> money side. I have been given to the end of August to pick these items
>>> up
>>> and hope to borrow the money that is needed to complete both trips. I
>>> will
>>> be sending tax receipts to all the donors and will update you off list
>>> after
>>> everything is complete. Thanks again John
>>>
>>>
>>
>
>
O.K. - now on to the power supply.
The +5v channel 1 supply is good, 69 mV peak to peak AC noise (measured on a scope with AC coupling)
the +-12v channels are ~292 mV of noise
the -5v channel has 500 mV of noise, even with an additional 1000 ?F capacitor across the output (to hopefully filter this junk out)
(-5V also has periodic fluctuations at a lower frequency)
All of this is high-frequency, excluding the -5v hum.
In short, it doesn't look like adding an external filter cap will help much, unless I go all the way and throw in a LC filter.
Pulled the P/S apart, and the board with +-12V and -5V has peculiar capacitors mounted on it - 3 lead Mallory Aerovox.
Are these really the multipart electrolytics that went out of style (I thought) with solid state?
The wiring is 2 leads connected to one side of the power rail, one lead to the other. Could twin-lead caps be substituted?
Out of interest (I suspect the answer's no), does Imagedisk support boards
based around the UM8398 FDC IC? According to the datasheet it'll handle FM
density, but I suspect that it's totally incompatible with anything else on
the planet...
cheers
Jules
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(")_(") signature to help him gain world domination.
After returning from VCF, a friend of mine brought me some stuff he saw
headed for the skip and saved it for me. Some of it is fun stuff!
1) DEI v.35 to RS232 Monitor Interface Adapter - this box connects between
two V.35 devices and presents a DB25 that can be connected to a programmable
data communications tester.
2) Two NAVTEL 75/1200 breakoutbox/testers - these cute boxes not only are
breakout boxes, but also do sync/async troubleshooting, bert tests, auto
format negotiation, etc.
3) Fluke 8920A True RMS Volt Meter
4) Teltone TLS2 Test Line Simulator - I believe this box simulates a telco
between two analog telephone devices (such as modems, etc.).
5) B&K Precision 1651 triple output bench power supply
6) THREE Tektronix 834 Programmable Data Communications Testers - these are
awesome, I was thinking about buying one, now I have three :) I'd prefer a
Spectron Northern Telecom Datascope2000, but hey, these were free :)
7) AMP MI-1 50 pin telco cable making tool
So... tell your friends to save you "funny looking electronic stuff", you
never know what you'll get :)
Jay West
>I wonder what those are? they don't sound rignt to me, I would have
>expected a 2-level singal only. I asusme all the power rails are nice and
>stable (sorry, I've had that one all too often...)
Threw the scope on them, 5v looks O.K. (about 2.5x background noise (I'm using unshielded alligator clip leads,
no probes yet). -5v +12v and -12v are all quite noisy. I don't know if this is a recent development (I checked it out
after replacing some caps in the 5v section), or if the trick of using a DMM in AC mode to check for noise doesn't
really work. I wonder if there's a common filter cap that's dried out somewhere, or if ones on each channel have gone
(there are 4 boards, mains rectifier & smoother, chopper, -5 v and +-12v channels, and 5v at 100(something) A)
Maybe it would be easier to do another external filter cap on each channel. I'll look at it a bit more and see what's up.
>I'd recommend using VMSTPC to read the tapes, and then using the SIMH tool
>(it's in the seperate tools tarball) to change it to a SIMH .TAP file.
I know about VMSTPCE (use it all the time), but its file format is not the
same as simh. A tool to convert, however, would solve all the problems.
Can it convert both ways?
VMSTPCE uses an RMS file with VFC file organization to store every tape
record in one file record - it's the "right" way to do it, but unfortunately
not very portable to other OSes.
Bob
I have an HP 3000/922 (PA-RISC architecture, not Series II
[sorry, Jay!]) available that I am looking to get rid of. This machine
is in a low-boy type rack with casters, with a similar sized rack for
disks. It has both HP-IB and SCSI controllers available for tape, disk,
and over media. It has an Ethernet controller, a DDS drive (possibly
dead), and two disks internally. The disk rack has 3 HP-IB disks of
the same model, each somewhere in the 650MB range. It will happily boot
>from either the HP-IB chains or the SCSI controller. It runs and was
passing diagnostics properly last time it was fired up (last year).
If anyone would like this machine, I can bring it to VCF/Midwest, or it
can be picked up near Lansing, MI.
I'm not asking anything for this machine, I just need the space back. I
would look fondly upon offers of RS/6000 gear or quiet 9GB+ 68-pin
SCSI drives, however :)
I have some more (though smaller) machines that I will be posting later
that will also be available at VCF/Midwest.
-Ryan
