>From: ard at p850ug1.demon.co.uk
>
>> fear it's more likely a 6530, and I assume they're unobtanium. Has
>> anyone ever come up with a kludge to effectively use a 6532 (and are
>> they any easier to find?) with an EPROM? Or anything else?
>
>My Commodore 8250LP disk drive has an official kludgeboard in what seems
>to be a socket designed for an 6530. It contains a 6532, a ROM, and a
>simple TTL chip ('04 or something like that).
>
>IIRC, though, the chip select levels of the 6530 were mask-programmable,
>so this might not work in all cases. And I don't think I can get any
>details of this to you by tomorrow anyway.
>
Hi
I've seen this done for pinball machines. There are some
potential issues other than just mapping the ROM. Some of
the internal selects are also mask programmed ( usually different
than the 6530 ). As I recall, one can even invert the data
going to the port( a real pain to handle ). I think there
is a document on the web someplace on making this patch.
Ahh, here it is. Look at:
http://www.6502.org/oldmicro/buildkim/buildkim.htm
later
Dwight
>From: "Vintage Computer Festival" <vcf at siconic.com>
>
>The problem turned out to be a tine in the reader that slipped out of its
>linkage. I fixed that and now everything is working again.
>
>Phew!
>
>Thanks for all the suggestions and advice!
Hi Sellam
Sorry I didn't get back to you right away ( I
do have a job ). There are a number of clutches along
the main shaft. Each one is the shiny disks that
you see along the shaft. I forget how many there are
(4 or 5 as I recall ). There is a little paw that
lifts up to allow each clutch to engage, doing any
number of things like resetting keyboard or running
some other function. When the paw is down
there are two little tabs that stick out
>from the clutch and rotate when the clutch is
engaged. When the forward tab hits the paw, it should
disengage the clutch. When the machine is running
at speed, inertia causes the two tabs to push together,
fully releasing the clutch. When running slow by hand,
you need to squeeze the two together when the forward
tab hit the paw. This fully disengages the clutch.
I know this is a little late but in the future it
should help.
Dwight
I just found that if I hold down the third typebar from the rear the
correct characters come out. Any ideas what's happening here?
--
Sellam Ismail Vintage Computer Festival
------------------------------------------------------------------------------
International Man of Intrigue and Danger http://www.vintage.org
[ Old computing resources for business || Buy/Sell/Trade Vintage Computers ]
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>From: "Jim Beacon" <jim at g1jbg.co.uk>
>
>
>> > in the process of repairing an ASR33 for someone else, I've found that
>the
>> > platten roller moulding has swollen, so that it no longer turns in the
>end
>> > plates. Has anyone else come across this problem, or know what may have
>> > caused it? (I suspect exposure to a solvent at sometime in the past).
>> >
>> > Luckily, I have a spare platten assembly!
>>
>> Well, presumably all you really needed was the roller?
>>
>> Since the old one is useless in its current state, it might be worth
>> putting the roller in a lathe and turning down the bearing areas. This
>> would be a pretty easy job ofr anyone with a metalwork lathe, so even if
>> you don't have access to one yourself, you might find a friend who would
>> do it for you. The sort of people who make model steam engines almost
>> always have a suitable lathe...
>>
>> -tony
>>
>
>Tony,
>
>I had considered skimming the roller, and if it was my machine I would,
>however, as the machine is going elsewhere, I'm opting for replacement (I
>don't like my repairs coming back after a couple of months.........)
>
>Jim.
Hi
It is most likely the oil used. Some oils swell the rubber
while others shrink it. Your not suppose to have so much oil
that the platten gets soaked.
Dwight
I shipped an ASR-32 into NY for a movie shoot and all was going relatively
well until I tried to run a punched tape through. Now wrong characters
are being printed (i.e. C comes out as K, return and linefeed don't work
but instead print characters). Something's stuck/slipped but I have
niether the skill nor time to try to diagnose and repair (though I'm
trying).
If someone in the NY city area has an ASR-32/33 that they can bring down
I'll be sure they get compensated for the time and effort.
Please try calling me at 925/216-0569. If you don't get an answer, call
718/930-8092 and ask for me, and say it's regarding the teletype.
TIA!!
--
Sellam Ismail Vintage Computer Festival
------------------------------------------------------------------------------
International Man of Intrigue and Danger http://www.vintage.org
[ Old computing resources for business || Buy/Sell/Trade Vintage Computers ]
[ and academia at www.VintageTech.com || at http://marketplace.vintage.org ]
>From: "Vintage Computer Festival" <vcf at siconic.com>
>
>
>I just found that if I hold down the third typebar from the rear the
>correct characters come out. Any ideas what's happening here?
>
Hi
It isn't clear if you have a reader or printer problem.
Does it work fine from the keyboard in local? If so,
it is most likely in the reader.
If it is the reader, look for a spring that may be disconnected
or a piece of crud inside. Try disconnecting the motor power
and operating by hand. Remember that when going slow, you need
to lockup the clutches by hand by squeezing the two tabs together
or they will drag. With the motor power off, you can turn the
fan and go slow.
Dwight
>
>Subject: Re: PDP-11 Hard Drives
> From: "Joe R." <rigdonj at cfl.rr.com>
> Date: Thu, 06 Oct 2005 14:25:01 +0000
> To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org>
>
>At 09:17 AM 10/6/05 -0400, Allison wrote:
>>>
>>>Subject: PDP-11 Hard Drives
>>> From: Madcrow Maxwell <madcrow.maxwell at gmail.com>
>>> Date: Thu, 06 Oct 2005 08:40:54 -0400
>>> To: cctalk at classiccmp.org
>>>
>>>I've been looking for a list of the various hard drive units available
>>>for the PDP-11 and their capacites, but have not been able to find one
>>>online. Can anybody help me out here?
>>
>>Reason is your asking too broad a question.
>>
>>PDP-11 was a series of CPUs/systems that used at least 4 busses and
>>an even greater array of storage facilities over the period from 1970
>>to current(yes current!). So to even start answering the question.
>>
>>What cpu or bus? Or what time period? Fixed or removable?
>
> And factory and/or 3rd party drives. If you want to include 3rd party it
>would take a book to list them all!
>
> Joe
I also forgot to ask what OS as tere wer device limits on some such as
exists with RT-11 (32mb per logical device). And what generation of OS
such as Unix V6 (no mscp).
Allison
Hi
I've acquired hard disk controller card. I'm in
need of some information on it as well as I seem
to be missing at least one PROM.
The board uses the WD1100 parts with a 8X300
control processor. It has an array of 9 sockets
for program of the 8X300 ( only 3 are populated
on my board ). It has 3 locations for MK4802 SRAM's
and a 82S191 ( also missing ).
It is manufactured by Codata Systems Corp and has a
part number 92-1011-01.
I was hoping that someone might have information
on this or have one of these boards that I could
get a copy of at least the 82S191. I suspect
that the 3 PROMs I do have are sufficient to run
the 8X300. I would guess the additional sockets
are for expansion of control. Other 8X300 controllers
I've seen use less code. I'd guess the 82S191 had
formatting information on it since it is on the
data side of the 8X300, along with the RAM.
Any help would be great.
Thanks
Dwight
I just posted these:
'A Pocket Guide to the 2100 Computer' Hewlett Packard '72
Drytek S-100 I/O card
Clamp On Ampmeter with 5 Scales (You have to see this one!)
Sperry Univac Computer Quick Reference Card 1978
HP 35 calculator box, manual, charger
Adobe Acrobat 5.0 New in Box
DEC A8000 ADV11-C 16-channel 12-bit A-to-D Converter card
Also some DEC cards and other interesting items. see
<http://search.ebay.com/_W0QQsassZrigdonjQQhtZ-1>
Joe
Hi All,
in the process of repairing an ASR33 for someone else, I've found that the
platten roller moulding has swollen, so that it no longer turns in the end
plates. Has anyone else come across this problem, or know what may have
caused it? (I suspect exposure to a solvent at sometime in the past).
Luckily, I have a spare platten assembly!
Jim.
Please see our website the " Vintage Communication Pages" at WWW.G1JBG.CO.UK
