Re: core matt repair

[jos via cctalk]

On 21.07.21 02:15, Brent Hilpert via cctalk wrote:


In general comment to the topic, I have seen planar arrays ("mats") with some 
number of randomly-situated wire splices in them.
These splices are in the gaps between bit arrays, not interior to a bit array 
(there isn't enough space between cores).
The splices are covered in a tiny dollop of (by appearance) silicon putty for 
insulation.


I have seen the same, and measured that these splices can turn highohmic. I 
recovered an 8/L coremat by resoldering these splices.

Re: core matt repair

[Brent Hilpert via cctalk]

On 2021-Jul-20, at 4:04 PM, Jules Richardson via cctech wrote:
> On 7/20/21 12:13 PM, pspan via cctech wrote:
>> I worked at a company called DMA located in Amery Wisconsin during the 80's 
>> and 90's that did do core mat repair. Yes, the gal that did the work used a 
>> scope. She replaced cores and wires. Good luck finding someone to do that 
>> work now. If I remember the process, first the mat was removed from the 
>> driver assembly, then the varnish was removed. Then the mat was repaired and 
>> revarnished and then reassembled and final test before returned to the 
>> customer.
> 
> Oh, well there you go... perhaps the board that I have was repaired by the 
> gal that you're talking about :-)
> 
> Unfortunately there are no initials on my board (as was often the case for 
> board repairs), only a date and job number.


In general comment to the topic, I have seen planar arrays ("mats") with some 
number of randomly-situated wire splices in them.
These splices are in the gaps between bit arrays, not interior to a bit array 
(there isn't enough space between cores).
The splices are covered in a tiny dollop of (by appearance) silicon putty for 
insulation.

The number of splices and consistency of appearance suggests they were done at 
the time of manufacture, while the random distribution suggests they were not 
part of the manufacturing intention. That is to say, the manufacturing process 
was itself less than perfect and necessitated 'repairs' so to speak.

On the question of manual vs automated assembly, I take it this could involve a 
mixture. For example, stringing a number of cores onto a single wire for one 
axis would be easy to automate, stringing the second axis is more difficult.
The development of 3-wire topologies over 4-wire would have helped automation, 
or reduced manual effort, considerably. For stringing, the really awkward 
aspect of the original 4-wire topology was the sense wire that angled through 
all the cores at 45 degrees to the X,Y,I wires. This was alleviated in the 
3-wire topology where there is just 90 degree and parallel relations.

Re: core matt repair

[Jules Richardson via cctalk]

On 7/20/21 12:13 PM, pspan via cctech wrote:
I worked at a company called DMA located in Amery Wisconsin during the 80's 
and 90's that did do core mat repair. Yes, the gal that did the work used a 
scope. She replaced cores and wires. Good luck finding someone to do that 
work now. If I remember the process, first the mat was removed from the 
driver assembly, then the varnish was removed. Then the mat was repaired 
and revarnished and then reassembled and final test before returned to the 
customer.


Oh, well there you go... perhaps the board that I have was repaired by the 
gal that you're talking about :-)


Unfortunately there are no initials on my board (as was often the case for 
board repairs), only a date and job number.


Jules

Re: Items Wanted

[Jay Jaeger via cctalk]

On 7/20/2021 7:34 PM, Josh Dersch wrote:
On Tue, Jul 20, 2021 at 4:06 PM Jay Jaeger via cctalk 
mailto:cctalk@classiccmp.org>> wrote:


On 7/20/2021 6:59 AM, Eric Moore wrote:
 >
 >
 >      >> 11) ESDI disk emulator
 >      >
 >      > I am not aware of any such beasties in the wild.  MFM,
yes, but I
 >     haven't seen ESDI.   I would love for such a thing to exist,
 >     thinking of my Apollo, 3B2 and IBM RT/PC workstations.
 >
 >     I’d also love to have one of these, preferably using SD or CF
 >     cards.  The Webster WQESD/04 card is a fantastic card, it’s only
 >     downfall is that it works with ESDI drives, rather than SCSI, and
 >     they’re big and loud. :-)
 >
 >     Zane
 >
 >
 > http://www.datexdsm.com/ESDI.php
 > is
 > what I was thinking of. There are a couple other commercial
models out
 > there on offer, no one seems to have one though in the discord or
 > apparently here :)
 >
 > -Eric
 >
 >

I fear these, as well as those shown on one or two other websites, are
vapor-ware.  The MFM emulators all seem out of stock, the ESDI emulator
(DWX750) "documentation" is not even a page - just a "blurb".


I had a similar experience with a set of emulators made by Arraid -- LCM 
inquired about one of their SMD emulators 
(https://www.arraid.com/data-storage-products/product/aem-1.html 
) and 
the response we got was "we can no longer source the parts to 
manufacture these, we have a few remaining in stock that we will sell 
for $10,000 a piece."  We did not purchase one.


I suspect that even if you could find someone to sell you one of these 
emulators, they would be extremely expensive.  I have never seen one for 
sale on the used market.  If you find one, consider yourself lucky.  If 
anyone *DOES* have one of these SMD emulators and wants to find a new 
home for it, do drop me a line.


- Josh


JRJ



For SMD, this patent may have been a bit of a stumbling block at one 
time, though if it was approved, it would have expired long ago.


https://patents.google.com/patent/WO1990001193A1/en

JRJ

Re: Items Wanted

[Josh Dersch via cctalk]

On Tue, Jul 20, 2021 at 4:06 PM Jay Jaeger via cctalk 
wrote:

> On 7/20/2021 6:59 AM, Eric Moore wrote:
> >
> >
> >  >> 11) ESDI disk emulator
> >  >
> >  > I am not aware of any such beasties in the wild.  MFM, yes, but I
> > haven't seen ESDI.   I would love for such a thing to exist,
> > thinking of my Apollo, 3B2 and IBM RT/PC workstations.
> >
> > I’d also love to have one of these, preferably using SD or CF
> > cards.  The Webster WQESD/04 card is a fantastic card, it’s only
> > downfall is that it works with ESDI drives, rather than SCSI, and
> > they’re big and loud. :-)
> >
> > Zane
> >
> >
> > http://www.datexdsm.com/ESDI.php  is
> > what I was thinking of. There are a couple other commercial models out
> > there on offer, no one seems to have one though in the discord or
> > apparently here :)
> >
> > -Eric
> >
> >
>
> I fear these, as well as those shown on one or two other websites, are
> vapor-ware.  The MFM emulators all seem out of stock, the ESDI emulator
> (DWX750) "documentation" is not even a page - just a "blurb".
>
>
I had a similar experience with a set of emulators made by Arraid -- LCM
inquired about one of their SMD emulators (
https://www.arraid.com/data-storage-products/product/aem-1.html) and the
response we got was "we can no longer source the parts to manufacture
these, we have a few remaining in stock that we will sell for $10,000 a
piece."  We did not purchase one.

I suspect that even if you could find someone to sell you one of these
emulators, they would be extremely expensive.  I have never seen one for
sale on the used market.  If you find one, consider yourself lucky.  If
anyone *DOES* have one of these SMD emulators and wants to find a new home
for it, do drop me a line.

- Josh




> JRJ
>

IBM 1410 Processor Operating System Compiler Status Report

[Jay Jaeger via cctalk]

Over the past few weeks I have been playing with the COBOL, FORTRAN and 
RPG compilers that are present on the IBM 1410 PR108 Processor Operating 
system tape, available at:


http://piercefuller.com/library/kau1401s.html (it is really 1410) and
https://sky-visions.com/ibm/ibm7010_soft.shtml (For use under SimH)


FORTRAN:  While the compiler seems to function, this is probably a "lost 
cause" as we have neither the FORTRAN library, nor the relocatable 
loader required - those were shipped by IBM on a separate tape.  Getting 
around this would require reproducing both.



COBOL:  It is not usable in its current state, but maybe not a totally 
lost cause.  It requires some macros (notably "MOVE=" for any MOVE 
statements) and Subroutines accessed via Autocoder CALL (for example, to 
use the DISPLAY verb.)  I have no current plans to do such work.  One 
would have to code some programs, see what got generated, and then 
create (or modify ones that had been started earlier) macros to support 
the result.  It would take a lot of work, but not impossibly much.


The relevant early IBM COBOL General Information manual is now available 
on bitsavers at


http://bitsavers.org/pdf/ibm/generalInfo/F28-8053-2_COBOL_General_Information_1961.pdf

I have a copy of the relevant IBM 1410 compiler supplement, manual 
number C28-0330, but it is on Fiche and portions are not very good images.




RPG   1410-RG-910-43:  This turned into an "ugly duckling" of sorts.  We 
have only the sparse information provided in the PR-134 Processor 
Operating System manual, C28-0287-1 (available on bitsavers).  HOWEVER, 
as luck and history would have it, it turned out that this RPG is based 
on an extremely similar to one of the early 1401 RPG "compilers" for 
which a manual *is* available, J24-0215-2. [I discovered this by looking 
at the 1410 bibliography, find the form numbers for the coding forms for 
1410 RPG, and searching for those, and getting hits on the 1401 manual, 
above.)  With that information, along with a little bit of disassembly 
to figure out most of what goes into the PR-108 "RG" control card it 
uses, I was able to put together a couple of sample programs, and kept 
some notes as well as a partial disassembly of Phase RPG1.


This might be the earliest RPG available anywhere - I haven't seen a 
1401 RPG tape image anywhere to date, though maybe someone has one I am 
not aware of.


Also, since it generates Autocoder, it might not be impossibly difficult 
to port one of the samples back to the 1401 - the logic implemented in 
the 1410 RPG generated Autocoder appears very very similar to that 
described in the 1401 manual.


The materials I put together relating to the IBM 1410 RPG "compiler" are 
 now available in a zip file at (feel free to copy)


https://drive.google.com/drive/folders/1RXtSCW0EpBYQqb_EY_iqnLUqt4btYWVt?usp=sharing

JRJ

Re: Re: DEC PDP-8/e H212 core mat repair

[Richard Milward via cctalk]

Going by the size, I'd say the Keronix board is for a Data General Nova or one 
of its ilk. Keronix did make core boards with p/n starting 816 for Novas.
**Richard

Message: 1
Date: Mon, 19 Jul 2021 16:50:10 -0500
From: Jules Richardson
To:cctalk@classiccmp.org
Subject: Re: DEC PDP-8/e H212 core mat repair
Message-ID:<769e6168-9024-fa20-5b9c-ed1cb91ec...@gmail.com>
Content-Type: text/plain; charset=iso-8859-15; format=flowed

On 7/19/21 3:40 AM, Joshua Rice via cctalk wrote:


I believe much of the core manufacturing for DEC minicomputers was
outsourced, but a lot of it had become much more automated by the late 60's
and early 70's.


I've got a trio of planes here, two of which are from a Lockheed MAC-16,
but the other one is made by Keronix out of Santa Monica for an unknown
machine (dated 1973, model number "P4" and p/n 816335 if that means
anything to anyone, approx 16"x16" with two 100-pin, double-sided finger
edge connectors on 0.1" spacing).

Anyhoo, the Keronix one has a sticker on it saying it was repaired by DMA,
inc. in Amery, WI in 1980 - which might suggest that there were third
parties around working on boards, rather than them having to go back to the
manufacturer for repair. (I have no idea what the nature of the repair was,
of course; maybe it was to surrounding logic rather than the mat itself).


It's worth noting that most computer manufacturers appreciated the
fragility of core memory planes at the time, with most of them being
protected with either PCB's or perspex/plastic shields on top of the core
planes.


Yes, that's how all the ones I've ever seen have been. The Keronix one has
an additional shield over the top of the entire PCB, on top of the one
protecting the cores.

Jules

Re: Items Wanted

[Jay Jaeger via cctalk]

On 7/20/2021 6:59 AM, Eric Moore wrote:



 >> 11) ESDI disk emulator
 >
 > I am not aware of any such beasties in the wild.  MFM, yes, but I
haven't seen ESDI.   I would love for such a thing to exist,
thinking of my Apollo, 3B2 and IBM RT/PC workstations.

I’d also love to have one of these, preferably using SD or CF
cards.  The Webster WQESD/04 card is a fantastic card, it’s only
downfall is that it works with ESDI drives, rather than SCSI, and
they’re big and loud. :-)

Zane


http://www.datexdsm.com/ESDI.php  is 
what I was thinking of. There are a couple other commercial models out 
there on offer, no one seems to have one though in the discord or 
apparently here :)


-Eric




I fear these, as well as those shown on one or two other websites, are 
vapor-ware.  The MFM emulators all seem out of stock, the ESDI emulator 
(DWX750) "documentation" is not even a page - just a "blurb".


JRJ

WANTED: IBM 360 operators panel

[Barry Hills via cctalk]

I am looking for an IBM 360 operator panel.  Model 55 would be wonderful but I 
would consider any 360/370.  To be used for demo so condition of switches & 
lights is important.  

Re: core matt repair

[pspan via cctalk]

I worked at a company called DMA located in Amery Wisconsin during the 
80's and 90's that did do core mat repair. Yes, the gal that did the 
work used a scope. She replaced cores and wires. Good luck finding 
someone to do that work now. If I remember the process, first the mat 
was removed from the driver assembly, then the varnish was removed. Then 
the mat was repaired and revarnished and then reassembled and final test 
before returned to the customer.


On 2021-07-20 12:00, cctech-requ...@classiccmp.org wrote:

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Today's Topics:

   1. Re: DEC PDP-8/e H212 core mat repair (ste...@malikoff.com)
   2. Re: DEC PDP-8/e H212 core mat repair (Joshua Rice)
   3. Re: DEC PDP-8/e H212 core mat repair (Joshua Rice)
   4. Re: DEC PDP-8/e H212 core mat repair (Tom Hunter)
   5. Re: DEC PDP-8/e H212 core mat repair (Jules Richardson)
   6. Re: DEC PDP-8/e H212 core mat repair (Rod Smallwood)
   7. Tektronix 8002 microprocessor lab software (Jules Richardson)
   8. Re: Tektronix 8002 microprocessor lab software (Zane Healy)
   9. Re: Tektronix 8002 microprocessor lab software (Al Kossow)
  10. Re: Tektronix 8002 microprocessor lab software (Al Kossow)
  11. Re: Tektronix 8002 microprocessor lab software (Al Kossow)
  12. Re: Tektronix 8002 microprocessor lab software (Jules Richardson)
  13. Re: Tektronix 8002 microprocessor lab software (Jules Richardson)
  14. Re: Tektronix 8002 microprocessor lab software (Zane Healy)
  15. Re: Items Wanted (Jay Jaeger)
  16. Re: Items Wanted (Zane Healy)
  17. Re: DEC PDP-8/e H212 core mat repair (Toby Thain)


--

Message: 1
Date: Mon, 19 Jul 2021 17:59:59 +1000
From: ste...@malikoff.com
To: "General Discussion: On-Topic and Off-Topic Posts"

Subject: Re: DEC PDP-8/e H212 core mat repair
Message-ID:
<84f709701f774aebb1a07a8bbb6eb091.squir...@webmail04.register.com>
Content-Type: text/plain;charset=utf-8

Tom said
I am curious if anyone has attempted to repair (replace) a broken wire 
in a
PDP-8/e H212 (MM8EJ) core mat (8 k word). The cores are not visible 
without
a microscope. I cannot imagine how these were even manufactured and 
wonder
if DEC service centers repaired core mat faults or if faulty boards 
were

simply discarded.

CDC 6600 cores were huge in comparison and I would not hesitate to 
replace

a broken core wire on those.


I have no idea how DEC made theirs but for IBM's System 360, one of
their engineers
came up with the clever idea of stretching the core wire so it necked
and broke, leaving
a work-hardened tapered point to thread the cores with.
They patented it https://patents.google.com/patent/US3314131A
(Source: page 187 of  'IBM's 360 and early 370 Systems' by Pugh et al)
On a Youtube film about the 360 they show cores being vibrated into the 
correct

orientation on a jig board.



--

Message: 2
Date: Mon, 19 Jul 2021 09:40:44 +0100 (BST)
From: Joshua Rice 
To: CCtalk 
Subject: Re: DEC PDP-8/e H212 core mat repair
Message-ID: <55e9b1e8.2735f.17abdecb557.webtop...@btinternet.com>
Content-Type: text/plain; charset=UTF-8; format=flowed




-- Original Message --
From: "Tom Hunter via cctalk" 
To: "General Discussion: On-Topic and Off-Topic Posts"

Sent: Monday, 19 Jul, 2021 At 06:33
Subject: DEC PDP-8/e H212 core mat repair
I am curious if anyone has attempted to repair (replace) a broken wire
in a
PDP-8/e H212 (MM8EJ) core mat (8 k word). The cores are not visible
without
a microscope. I cannot imagine how these were even manufactured and
wonder
if DEC service centers repaired core mat faults or if faulty boards 
were

simply discarded.
CDC 6600 cores were huge in comparison and I would not hesitate to
replace
a broken core wire on those.
Best regards
Tom Hunter


I believe much of the core manufacturing for DEC minicomputers was
outsourced, but a lot of it had become much more automated by the late
60's and early 70's. I believe it was done by machine, with a tray to
hold the toroids in place, and a very fine needle-like "bobbin" that
threaded the wires through the toroids. I believe threading the cores 
by

hand had become largely obsolete by the time the PDP-8 came onto the
market.
Though i can't confirm it, i highly doubt that DEC engineers would
repair core planes. These would more likely be sent back to the
manufacturer for "recycling", with the cores being recovered and 
reused.

It's worth noting that most computer manufacturers appreciated the
fragility of 

Re: Compaq Deskpro boards/hard drives from the late 1990s

[Grant Taylor via cctalk]

On 7/20/21 12:11 PM, Kevin Anderson via cctalk wrote:
Is there a market for any of this that is worth pursing, or is this all 
too generic and plentiful to worry about?  Giving shipping and that, I 
am not sure how much of this I'd care to deal with this through resale 
(eBay or privately) versus just dropping it all at the electronics 
recycling shop (which fortunately I have locally).


I think there is a market for this hardware.  I don't know how big it is.

I don't need any of it any more than I need a hole in the head.  But 
that being said, the collector (as in acquisitions) in me is interested 
to know how much it might be to ship the lot.  But on the other hand I 
don't want to deny people who have an actual need for them.


I suspect that the video cards and the hard drives are probably the more 
valuable parts.  For a given value.


/If/ I had such a stash and wanted to get rid of it, I'd inventory what 
I had and make it available for others to raise their hand if they are 
interested.  I think that the drives would be worth more if they had 
been tested and you know that they work.  E.g. run SpinRite level 4 
against them.


3.3 and / or 5.0 volt PCI may also make a difference for some people.

I definitely think there is a market.  And that if you (or someone) is 
willing to put in a little effort, I'd expect that each of the 
components could move for $5-$25 (or maybe even more) plush S  But 
that's a time investment to get anything out of them and it sounds like 
the real value in them to you is the space they are occupying / will be 
vacating.




--
Grant. . . .
unix || die

Re: Compaq Deskpro boards/hard drives from the late 1990s

[Chris Zach via cctalk]

Indeed, those are nice systems. Some of them were a bit daffy (the 
Prosignia Pentium 120's were odd) but I still have an XE4100 that I run 
NextStep on. The integrated video was great


I do however miss my Deskpro/2000. Dual Pentium Pro and by the end I had 
dual PODP chips running in it with I think 2-4 gb of memory. That system 
was impressive


C

On 7/20/2021 2:20 PM, Bill Degnan via cctalk wrote:

If you're looking to donate, Kennett Classic can use these to support
what's in our "post vintage" room (goes up to 1997)
Bill

On Tue, Jul 20, 2021 at 2:11 PM Kevin Anderson via cctalk <
cctalk@classiccmp.org> wrote:


For a time I had quite a few Compaq Deskpro towers that had acquired (for
free) from my employer after they updated to a newer HP Compaq model.
These Compaq Deskpros were the white-boxed variety with Pentium III the
like processors that date to the later part of the 1990s and into the
2000s.  They interested me because they were able to work with the flavors
of Linux that were becoming plentiful and useful at the time (like
Mandrake, etc.) Anyway, the desktops themselves are gone, as well as the PC
keyboards and the monitors that went with them, with this paragraph just
setting the scene

But at the same time I also acquired (pulled) from these same computers
and their siblings a whole bunch of wired Ethernet network cards, one or
two video cards, a whole bunch of the IDE/PATA 5.25-inch desktop CD drives,
and a whole bunch(!) of 10- and 20-GByte IDE/PATA 5.25-inch desktop hard
drives.  I believe the vintage makes them all PCI cards for the network and
video cards. For some reason I must have had it in my head that I would all
need these extra cards (and more) to keep these boxes (and other desktops)
going into the future when the apocalypse came  !

Now I have no need for any of these parts. I don't want to chuck them to a
recycler either, but it is tempting just to get the stuff out of the house
(as I need to seriously downsize prior to retirement).

Is there a market for any of this that is worth pursing, or is this all
too generic and plentiful to worry about?  Giving shipping and that, I am
not sure how much of this I'd care to deal with this through resale (eBay
or privately) versus just dropping it all at the electronics recycling shop
(which fortunately I have locally).

Just starting to sort this out...I've been meaning to send this e-mail for
awhile now.  Your collective thoughts?  I know most of this is too new for
most of your interests...

Kevin Anderson, Dubuque, Iowa

Re: Compaq Deskpro boards/hard drives from the late 1990s

[Bill Degnan via cctalk]

If you're looking to donate, Kennett Classic can use these to support
what's in our "post vintage" room (goes up to 1997)
Bill

On Tue, Jul 20, 2021 at 2:11 PM Kevin Anderson via cctalk <
cctalk@classiccmp.org> wrote:

> For a time I had quite a few Compaq Deskpro towers that had acquired (for
> free) from my employer after they updated to a newer HP Compaq model.
> These Compaq Deskpros were the white-boxed variety with Pentium III the
> like processors that date to the later part of the 1990s and into the
> 2000s.  They interested me because they were able to work with the flavors
> of Linux that were becoming plentiful and useful at the time (like
> Mandrake, etc.) Anyway, the desktops themselves are gone, as well as the PC
> keyboards and the monitors that went with them, with this paragraph just
> setting the scene
>
> But at the same time I also acquired (pulled) from these same computers
> and their siblings a whole bunch of wired Ethernet network cards, one or
> two video cards, a whole bunch of the IDE/PATA 5.25-inch desktop CD drives,
> and a whole bunch(!) of 10- and 20-GByte IDE/PATA 5.25-inch desktop hard
> drives.  I believe the vintage makes them all PCI cards for the network and
> video cards. For some reason I must have had it in my head that I would all
> need these extra cards (and more) to keep these boxes (and other desktops)
> going into the future when the apocalypse came  !
>
> Now I have no need for any of these parts. I don't want to chuck them to a
> recycler either, but it is tempting just to get the stuff out of the house
> (as I need to seriously downsize prior to retirement).
>
> Is there a market for any of this that is worth pursing, or is this all
> too generic and plentiful to worry about?  Giving shipping and that, I am
> not sure how much of this I'd care to deal with this through resale (eBay
> or privately) versus just dropping it all at the electronics recycling shop
> (which fortunately I have locally).
>
> Just starting to sort this out...I've been meaning to send this e-mail for
> awhile now.  Your collective thoughts?  I know most of this is too new for
> most of your interests...
>
> Kevin Anderson, Dubuque, Iowa
>

Compaq Deskpro boards/hard drives from the late 1990s

[Kevin Anderson via cctalk]

For a time I had quite a few Compaq Deskpro towers that had acquired (for free) 
from my employer after they updated to a newer HP Compaq model.  These Compaq 
Deskpros were the white-boxed variety with Pentium III the like processors that 
date to the later part of the 1990s and into the 2000s.  They interested me 
because they were able to work with the flavors of Linux that were becoming 
plentiful and useful at the time (like Mandrake, etc.) Anyway, the desktops 
themselves are gone, as well as the PC keyboards and the monitors that went 
with them, with this paragraph just setting the scene

But at the same time I also acquired (pulled) from these same computers and 
their siblings a whole bunch of wired Ethernet network cards, one or two video 
cards, a whole bunch of the IDE/PATA 5.25-inch desktop CD drives, and a whole 
bunch(!) of 10- and 20-GByte IDE/PATA 5.25-inch desktop hard drives.  I believe 
the vintage makes them all PCI cards for the network and video cards. For some 
reason I must have had it in my head that I would all need these extra cards 
(and more) to keep these boxes (and other desktops) going into the future when 
the apocalypse came  !

Now I have no need for any of these parts. I don't want to chuck them to a 
recycler either, but it is tempting just to get the stuff out of the house (as 
I need to seriously downsize prior to retirement).

Is there a market for any of this that is worth pursing, or is this all too 
generic and plentiful to worry about?  Giving shipping and that, I am not sure 
how much of this I'd care to deal with this through resale (eBay or privately) 
versus just dropping it all at the electronics recycling shop (which 
fortunately I have locally).

Just starting to sort this out...I've been meaning to send this e-mail for 
awhile now.  Your collective thoughts?  I know most of this is too new for most 
of your interests...

Kevin Anderson, Dubuque, Iowa

VT101 parts available, found on Reddit

[Joshua Rice via cctalk]

Someone on Reddit has found much of a VT101 and would like to rehome it. 
Not sure where he's located, but somewhere in US
Thread is here: 
https://www.reddit.com/r/vintagecomputing/comments/ogy6im/so_i_found_a_vt101/

Re: Items Wanted

[Eric Moore via cctalk]

> > 4) SD2SCSI
>
> Do you mean a device that emulates a SCSI drive with an SD card?  Why
> not just go out and purchase a SCSI2SD V5.1 - a little slower than the
> newer ones, but works fine in my Sun, SGI and Intergraph Boxen.
>
> I also just bought one of the less expensive Androda SCSI emulators -
> designed for Macs, really, but it might work and it is relatively
> inexpensive.
>

Yeah I likely will, it is on the list because I would prefer to trade


> > 7) Unfomatted pertec controller (any bus)
>
> I have some old Pertec formatters that have no bus interface.  Free to
> good homes.  Some were mouse houses for a while, but were subsequently
> cleaned up reasonably well.  Models F649-72 (2 of those) and F649-40.
> Heavy to ship.
>
> In addition, I think I have a TC031, Pertec/QBus (I think) that I really
> am not using.  I tried it out once - I think the issue was that I had a
> Pertec interface speed mismatch between it and the HP drive I have with
> a Pertec interface (which also has issues with loading tape.)   I
> suspect it is formatted, however.
>

Thank you! I will look at that model number you provided. My Kennedy 9100
drive either needs a controller, or to go away. Damn thing weighs a ton and
takes a lot of room.

-Eric

Re: Items Wanted

[Eric Moore via cctalk]

>
> >> 11) ESDI disk emulator
> >
> > I am not aware of any such beasties in the wild.  MFM, yes, but I
> haven't seen ESDI.   I would love for such a thing to exist, thinking of my
> Apollo, 3B2 and IBM RT/PC workstations.
>
> I’d also love to have one of these, preferably using SD or CF cards.  The
> Webster WQESD/04 card is a fantastic card, it’s only downfall is that it
> works with ESDI drives, rather than SCSI, and they’re big and loud. :-)
>
> Zane
>
>
http://www.datexdsm.com/ESDI.php is what I was thinking of. There are a
couple other commercial models out there on offer, no one seems to have one
though in the discord or apparently here :)

-Eric

RE: Tektronix 8002 microprocessor lab software

[Paul Birkel via cctalk]

> -Original Message-
> From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Al Kossow
via cctalk
> Sent: Monday, July 19, 2021 7:25 PM
> To: Al Kossow via cctalk
> Subject: Re: Tektronix 8002 microprocessor lab software
>
> On 7/19/21 4:20 PM, Al Kossow via cctalk wrote:
> > On 7/19/21 4:03 PM, Jules Richardson via cctalk wrote:
>
> > It would be nice to save a complete system though, since most have been
tossed out since there is little
> > practical use for them now. 
>
> I've collected a LOT of in-circuit emulators and microprocessor
development systems over the decades, and
> I'm trying to decide right now what I'm going to do with them.

If there's an HP 64276 Microprogram Development Subsystem
(http://bitsavers.trailing-edge.com/pdf/hp/64000/brochures/5953-9279_Micropr
ogram_Development_Subsystem_Jun-1985.pdf) in there I'm interested in taking
it off your hands.  Or off the hands of anyone else who might have one :-}.

paul