On Sun, May 19, 2019 at 11:48 PM Brent Hilpert via cctalk
wrote:
>
> Except the SRUN (K8 SRUN L) action is not latched, so it probably appears as
> an
> active-low heartbeat pulse with some periodicity when the processor is in run
> mode.
> A low-going pulse during PH 3 every instruction cycle p
On 2019-May-20, at 12:11 AM, Glen Slick via cctalk wrote:
> On Sun, May 19, 2019 at 11:48 PM Brent Hilpert via cctalk
> wrote:
>>
>> Except the SRUN (K8 SRUN L) action is not latched, so it probably appears as
>> an
>> active-low heartbeat pulse with some periodicity when the processor is in
>>
I have a DEC VT420 terminal which works pretty well. However, I am
concerned that sometimes the characters on the screen seem to get torn
sideways and jump around a little on a timescale of less than one second.
My guess is that there is some issue with the power supply, but that is
just a guess.
Alright, I hooked the oscilloscope up to SRUN off of E68, and found that it
oscillates low at 58.68KHz. This oscillation is very short lived, with it
bouncing back up to high nearly instantly. Hitting the Run/Halt switch does
not have any effect on the period or amplitude of the oscillation.
On Mo
> From: Jos Dreesen
> And so the story continues
> https://ibms360.co.uk/
Wow, what a great recover, and a great site documenting it!
Renting temporary local storage was a great idea; it would have been hard
to get all that out of there on schedule any other way. (Alas, I don't
k
On Mon, May 20, 2019 at 10:39 AM Noel Chiappa via cctalk <
cctalk@classiccmp.org> wrote:
> They should have tried to get the raised floor too (I guess it wasn't
> included in the sale), since i) it'll be useful if they try and get the
> machine up and running, and ii) it'll probably just get scrap
Only just within the last month I finally obtained a ROM dump from a
production HP-01, for potential use in my Nonpareil simulator. Previously I
only had the preproduction code listed in a US patent. I'm not sure when
I'll have time to actually work on the simulation, though.
My original plan had
> I guess it would look right for the era, but I'd never build a data center
> with raised flooring after my experiences with them. It's such a pain to
> work with compared to a sealed concrete floor and overhead cable trays.
But with a raised floor, you can whack the tile puller down in such a
w
On Mon, May 20, 2019 at 12:11 PM William Donzelli
wrote:
> > I guess it would look right for the era, but I'd never build a data
> center
> > with raised flooring after my experiences with them. It's such a pain to
> > work with compared to a sealed concrete floor and overhead cable trays.
>
> B
> From: Mister PDP
> After a day of confusing and mixed up signals (I don't really use
> this type of equipment very often) .. I switched over to the
> oscilloscope
Don't feel bad, I too prefer to rely on an oscilloscope by default; not
only does it let you see what's really hap
anyone figured out what these were being used for in that building?
On Mon, May 20, 2019 at 11:11 AM William Donzelli via cctalk <
cctalk@classiccmp.org> wrote:
> > I guess it would look right for the era, but I'd never build a data
> center
> > with raised flooring after my experiences with them
Since we have nice microscopes at the museum project we were hired to
photo some IC innards years back. This ended up becoming a minor
obsession for a short time as the artwork under various illuminations
is fantastic.
One of the things that seemed to show the
should say
Francion Yamamotto not Yrancion Yamamotto
In a message dated 5/20/2019 10:07:04 AM US Mountain Standard Time,
couryho...@aol.com writes:
Since we have nice microscopes at the museum project we were hired to
photo some IC innards years back. This ended up beco
The model 20 installations that I played with were mostly to supplant
unit-record gear, which typically did not use a raised floor
configuration. Mostly the CPU, card mulcher, printer and perhaps a 2311.
The installation auctioned off is one of the larger Model 20 setups that
I've seen.
--Chuck
Hi,
I got a stash of documentation yesterday. Found a book "WANG 370
calculating system, program library volume 1" which I don't have any use
for. Looks to be almost unread, it has become a bit yellow and it has a
small sticker on the front page. Printed in 1968.
Is there anybody that want's it (
On 20/05/2019 18:42, Chuck Guzis via cctalk wrote:
The model 20 installations that I played with were mostly to supplant
unit-record gear, which typically did not use a raised floor
configuration. Mostly the CPU, card mulcher, printer and perhaps a 2311.
The installation auctioned off is one of
I'm going to be in Australia and then New Zealand for most of June, and was
wondering if there was anything interesting classic computer wise to visit?
I'm planning on being in Sydney for the Australia half of the trip, and
haven't made many plans for New Zealand yet besides flying in/out of
Auckla
On 5/20/19 10:10 AM, William Donzelli via cctalk wrote:
I cannot imagine (how) difficult it would be to run S/360 era cables in
overhead trays. Many are an inch or more in diameter.
I think it would be quite annoying to get cables from floor level up to
the overhead cable trays. Especially fr
On 5/20/19 10:40 AM, Patrick Finnegan via cctalk wrote:
An acceptable compromise is something like the 6 ft raised floor they
have over at NCSA.
I've often wondered why more people don't do raised floors high enough
to walk under.
I guess they are trying to put it in one room and not have tw
try crawling under them
On Mon, May 20, 2019 at 4:03 PM Grant Taylor via cctalk <
cctalk@classiccmp.org> wrote:
> On 5/20/19 10:40 AM, Patrick Finnegan via cctalk wrote:
> > An acceptable compromise is something like the 6 ft raised floor they
> > have over at NCSA.
>
> I've often wondered why mo
> I'm used to 2' (24") raised floors.
I was used to 24 inch floors packed with so many dead cables they were
effectively 6 to 12 inch floors. Or worse.
--
Will
> Can you check that BHALT on the QBUS is actually asserted (i.e. 0V)
when the switch is in HALT?
I checked the BHALT signal going into the backplane, and it seems to be in
good working order. I took a picture of the readouts for SRUN, which you
can see here:
https://photos.google.com/share/AF1Qi
I used to have an ADM-3A Dumb Terminal... fixed it up, and made my own
lower-case ROM from a 2716 EPROM and a lot of small wires.
Sold it around 2005 or so, but can't remember who bought it.
Anyway I'd like to buy it back if the current owner is out there and isn't
using it :)
Thanks
Charles
On Mon, May 20, 2019 at 5:07 PM William Donzelli via cctalk <
cctalk@classiccmp.org> wrote:
> > I'm used to 2' (24") raised floors.
>
> I was used to 24 inch floors packed with so many dead cables they were
> effectively 6 to 12 inch floors. Or worse.
>
This gets at exactly the reason I dislike r
On 5/20/19 2:04 PM, Adrian Stoness via cctalk wrote:
> try crawling under them
You'd only upset the mice and the cockroaches. I recall that back in
the day at CDC SVLOPS, the local CEs made a pet of one of the sub-floor
mice. Field crickets were a problem back then too--the moment that the
weath
> -Original Message-
> From: cctalk On Behalf Of Grant Taylor via
> cctalk
> Sent: 20 May 2019 22:00
> To: cctalk@classiccmp.org
> Subject: Re: Pleas ID this IBM system
>
> On 5/20/19 10:10 AM, William Donzelli via cctalk wrote:
> > I cannot imagine (how) difficult it would be to ru
> On May 20, 2019, at 5:21 PM, Patrick Finnegan via cctalk
> wrote:
>
> On Mon, May 20, 2019 at 5:07 PM William Donzelli via cctalk <
> cctalk@classiccmp.org> wrote:
>
>>> I'm used to 2' (24") raised floors.
>>
>> I was used to 24 inch floors packed with so many dead cables they were
>> eff
Lookup Max Burnet in Sydney, well worth a visit.
Regards
Rob
> -Original Message-
> From: cctalk On Behalf Of Patrick Finnegan
> via cctalk
> Sent: 20 May 2019 21:41
> To: General Discussion: On-Topic and Off-Topic Posts
>
> Subject: Things to do in Australia & New Zealand?
>
> I'm go
>Subject: Things to do in Australia & New Zealand?
>From: Patrick Finnegan
>I'm going to be in Australia and then New Zealand for most of June, and was
>wondering if there was anything interesting classic computer wise to visit?
>I'm planning on being in Sydney for the Australia half of the trip,
had to crawl 300feet under raised floor cause it was carpeted runing
48pair fiber line took a good hour and half to get it over to the room with
the rack in it from the building raise
On Mon, May 20, 2019 at 4:25 PM Chuck Guzis via cctalk <
cctalk@classiccmp.org> wrote:
> On 5/20/19 2:04 PM,
On 5/20/19 1:30 PM, Lawrence Wilkinson via cctalk wrote:
> As Adam isn't on the list, and I am one of those in that photograph...
>From the pictures, it looks like the packs were left in the drives. You should
>pull them
and lock down the actuator arm before moving them any further.
> On May 20, 2019, at 7:12 PM, Guy Dunphy via cctalk
> wrote:
>
>> Subject: Things to do in Australia & New Zealand?
>> From: Patrick Finnegan
>
>> I'm going to be in Australia and then New Zealand for most of June, and was
>> wondering if there was anything interesting classic computer wise to
Fantastic. It fell into the right hands.
Marc
And so the story continues
https://ibms360.co.uk/
Nomarski microscopy, Ed. Differential phase contrast microscopy. Makes very
small height differences (partial wavelength) on mostly planar objects pop out,
and creates amazing color effects as a biproduct. Pretty much a stalwart of any
good cleanroom microscope. Every manufacturer offers it, usu
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