Was looking for a higher resolution scan of page 10 of August 1980 issue of
80 Microcomputing magazine.
The one online has some "square markings" -- and maybe that's just the way
it is, from the original photographs and how they got published in that
issue. But finding a physical copy might
On 3/10/23 17:42, Paul Koning via cctalk wrote:
> CDC 6000 series is the one I know of. But they'd also use either 1 or 3
> phase regular 50/60 Hz power. For example, the console display uses 3 phase
> 400 Hz for its power supplies (nice for low ripple) and 60 Hz 110 V for fans.
> The CPU
On 3/10/23 20:55, jim stephens via cctalk wrote:
> The 1620's I resurrected at USL in Lafayette, La. were card in and out.
> There was also a printer. It had an assembler deck and a Fortran compiler.
But no 1311s? Shame.
--Chuck
On 3/10/23 19:07, Sellam Abraham via cctalk wrote:
The school district was thrilled to get the PDP. Then they had PG set
up the power for it. Some PG technicians did not know the difference
between "Delta" and "Wye"/"Y" three phase! Seriously dsmaged the
machine.
This goes a bit sideways
I'm not sure what you're asking for, can you clarify?
Bill
On Fri, Mar 10, 2023, 11:52 PM Mark Huffstutter via cctalk <
cctalk@classiccmp.org> wrote:
> Ah, I missed the physical copy part, You might have already found this one
> online.
>
> Mark
>
> -Original Message-
> From: Mark
On 3/10/23 20:13, Gavin Scott via cctalk wrote:
And all the OS/360 variants were so late that they introduced three
other operating systems as a stopgap to allow IBM to actually ship
systems that were usable by customers. First came Basic Operating
System/360 (BOS/360), which was pretty much
Ah, I missed the physical copy part, You might have already found this one
online.
Mark
-Original Message-
From: Mark Huffstutter
Sent: Friday, March 10, 2023 8:45 PM
To: General Discussion: On-Topic and Off-Topic Posts
Subject: RE: [cctalk] 80 Micro Aug 1980 page scan
Steve,
Steve,
There is a pretty good copy on archive.org
https://archive.org/details/80-microcomputing-magazine-1980-08
Regards,
Mark
-Original Message-
From: Steve Lewis via cctalk
Sent: Friday, March 10, 2023 8:40 PM
To: General Discussion: On-Topic and Off-Topic Posts
Cc: Steve
Anyone here have a physical copy of 80 Microcomputing (TRS-80 themed) issue
from August 1980? There is a better quality scan of a page I'm trying to
get.
Thanks,
Steve
On 3/10/23 17:42, Paul Koning via cctalk wrote:
> CDC 6000 series is the one I know of. But they'd also use either 1 or 3
> phase regular 50/60 Hz power. For example, the console display uses 3 phase
> 400 Hz for its power supplies (nice for low ripple) and 60 Hz 110 V for fans.
> The CPU
that's still happening today. Up here in the north woods, trees in
lines is a weekly thing and the PGE supers will tell you directly to
"make sure you get EVERYTHING that we broke" but not to worry about
receipts.
steve
On 3/10/23 5:07 PM, Sellam Abraham via cctalk wrote:
On Fri, Mar 10,
On Fri, Mar 10, 2023 at 7:01 PM Jon Elson via cctalk
wrote:
> On 3/10/23 13:00, Paul Koning via cctalk wrote:
> > You mean DOS/360 as opposed to OS/360?
> MFT was Multiprogramming with a Fixed number of Tasks, MVT
> was Multiprogramming with a Variable number of Tasks.
And all the OS/360
> On Mar 10, 2023, at 6:32 PM, Chuck Guzis via cctalk
> wrote:
>
> On 3/10/23 15:11, Fred Cisin via cctalk wrote:
>
>
>> extension cord / dedicated circuit / dedicated pole transformer
>>
>> Which machines needed 3-phase?
>
> Extra points for requiring an MG set furnishing 400Hz 3-phase.
OB_3-phase anecdote:
On Fri, 10 Mar 2023, Sellam Abraham via cctalk wrote:
That internet convention (OB) is so old now it's archaic, and vintage in
and of itself. Amazing.
You rang? (cf. Maynard G. Krebs)
The school district was thrilled to get the PDP. Then they had PG set
up the
On 3/10/23 17:20, Bill Gunshannon via cctalk wrote:
On 3/10/2023 6:11 PM, Fred Cisin via cctalk wrote:
On Fri, 10 Mar 2023, Kevin Anderson via cctalk wrote:
I always thought of the distinctions this way (from my
basis of exposure from late 1970s through the 1980s) and
from a higher
On 3/10/23 16:36, Grant Taylor via cctalk wrote:
On 3/10/23 1:57 PM, Sellam Abraham wrote:
Don't underestimate the troubleshooting utility of
re-seating every chip that is socketed.
Fair enough.
Certainly check the Power OK signal from the power supply,
if that isn't working the whole
On 3/10/2023 6:32 PM, Chuck Guzis via cctalk wrote:
On 3/10/23 15:11, Fred Cisin via cctalk wrote:
extension cord / dedicated circuit / dedicated pole transformer
Which machines needed 3-phase?
Extra points for requiring an MG set furnishing 400Hz 3-phase.
Univac 1100
IBM 360/40
On Fri, Mar 10, 2023 at 3:58 PM Fred Cisin via cctalk
wrote:
> OB_3-phase anecdote:
>
That internet convention (OB) is so old now it's archaic, and vintage in
and of itself. Amazing.
> So, they decided to replace it with microcomputers. They sold it to a
> local school district, and bought
On 3/10/23 13:00, Paul Koning via cctalk wrote:
On Mar 10, 2023, at 1:38 PM, Chuck Guzis via cctalk
wrote:
On 3/10/23 10:20, Bill Gunshannon via cctalk wrote:
The first mainframe I worked on was single user, single tasking.
S/360 DOS provided for one "background" memory partition and two
OB_3-phase anecdote:
PG bought a replacement machine for the school district, on the
condition that all involved go along with a false story that it had been
a lighning strike!
On Fri, 10 Mar 2023, Chuck Guzis via cctalk wrote:
Doesn't seem to be an uncommon practice. I remember an
On 3/10/23 15:57, Fred Cisin via cctalk wrote:
> OB_3-phase anecdote:
> PG bought a replacement machine for the school district, on the
> condition that all involved go along with a false story that it had been
> a lighning strike!
Doesn't seem to be an uncommon practice. I remember an
OB_3-phase anecdote:
Shortly before I started teaching at the college (so I got all of the
details secondhand), . . .
They had a PDP (I don't even know what model) that they used for the
prograamming classes. But, they had constant problems with the
[after-market?] disk drive, so it was
On 3/10/23 15:11, Fred Cisin via cctalk wrote:
> extension cord / dedicated circuit / dedicated pole transformer
>
> Which machines needed 3-phase?
Extra points for requiring an MG set furnishing 400Hz 3-phase.
--Chuck
On 3/10/23 13:32, mike via cctalk wrote:
> Chuck can you give a few details about 'baking' disks?
I can tell you how I do it--an "oven" held at 58C +/- 0.5C with good air
circulation. Mine is custom built, where the heat source is a 75W
incandescent lamp, low-speed fan and PID controller. I've
On 3/10/23 13:22, Sellam Abraham via cctalk wrote:
>
> Just when you think you've heard of everything. How long have you been
> keeping this knowledge from us?
>
> https://www.amazon.com/Mystic-Moments-RMCYCL100-Cyclomethicone-Liquid/dp/B00I5HBBGW
>
> $15 for 125mL. Sounds like that would be
On 3/10/2023 6:11 PM, Fred Cisin via cctalk wrote:
On Fri, 10 Mar 2023, Kevin Anderson via cctalk wrote:
I always thought of the distinctions this way (from my basis of
exposure from late 1970s through the 1980s) and from a higher
educational setting primarily:
Mainframe = repairs required
On Fri, 10 Mar 2023, Kevin Anderson via cctalk wrote:
I always thought of the distinctions this way (from my basis of exposure
from late 1970s through the 1980s) and from a higher educational setting
primarily:
Mainframe = repairs required multiple technicians, some possibly there
full-time;
I always thought of the distinctions this way (from my basis of exposure from
late 1970s through the 1980s) and from a higher educational setting primarily:
Mainframe = repairs required multiple technicians, some possibly there
full-time; regular operator(s) present, and a locked door located
On 3/10/23 1:57 PM, Sellam Abraham wrote:
Don't underestimate the troubleshooting utility of re-seating every
chip that is socketed.
Fair enough.
Though I think there are very few socketed chips:
Link - IBM PS/2 Model 80 "Type 1" (386DX-16) Planer
-
> The first mainframe I worked on was single user, single tasking and all jobs
> were
>
> submitted as "batch" as in a batch of cards. :-)
>
> Second Mainframe I worked on supported lots of users but to the user it was
>
> still small amount of interactive and the rest batch. multi-user was
The term "mainframe" comes from telephone switching technology -- the
electromechanical kind from before the time of electronic telephone switches.
Its association with computers is from the earliest days of the commercial
computer business and precedes the minicomputer era by quite a bit.
As
Yes, the G-15 was definitely a digital computer, but I'm not aware that it had
any "add-on analog element," at least not any that was a standard Bendix
product. There was a differential analyzer, the DA-1, that attached to the G-15
and used some of its drum memory lines for storage, but it was
Chuck can you give a few details about 'baking' disks?
Mike Zahorik
(414) 254-6768
-Original Message-
From: Chuck Guzis via cctalk [mailto:cctalk@classiccmp.org]
Sent: Friday, March 10, 2023 03:12 PM
To: Sellam Abraham via cctalk
Cc: Chuck Guzis
Subject: [cctalk] Re: Why the Floppy Disk
On Fri, Mar 10, 2023 at 02:00:19PM -0500, Paul Koning via cctalk wrote:
> You mean DOS/360 as opposed to OS/360? I don't know that one.
DOS/360 evolved into DOS/VS, DOS/VSE, and through a few other versions
eventually evolving into today's z/VSE.
> But OS/360 came in three flavors: PCP, MFS,
On Fri, Mar 10, 2023 at 1:12 PM Chuck Guzis via cctalk <
cctalk@classiccmp.org> wrote:
> On 3/10/23 12:50, Sellam Abraham via cctalk wrote:
>
> > Please explain, Chuck.
>
> Sure, bake the disks (I'm sure you know how to do this), then just
> before reading, coat the surface with a thin coat of
On 3/10/23 12:50, Sellam Abraham via cctalk wrote:
> Please explain, Chuck.
Sure, bake the disks (I'm sure you know how to do this), then just
before reading, coat the surface with a thin coat of cyclomethicone (the
stuff has almost no surface tension, so a couple of drops works). It
lubricates
On Fri, Mar 10, 2023 at 12:47 PM Grant Taylor via cctalk <
cctalk@classiccmp.org> wrote:
> On 3/8/23 9:18 PM, Grant Taylor wrote:
> > I acquired an IBM PS/2 Model 80 (8580-071) today and am looking for
> > advice on what I should do to check it out before, during, and after
> > applying power for
It's helping arrange content and tempo, so it's been good for that (and why
it is still a "draft"). We'll try to get it read (but no sound studio, so
then you end up with dog barks, lawn mowers, and airplanes in the
background haha).I don't think I can do attachments here, but could
post the
On Fri, Mar 10, 2023 at 10:21 AM Bill Gunshannon via cctalk <
cctalk@classiccmp.org> wrote:
>
> This whole mess is to complicated to ever sort out and loaded with more
> opinion than fact. Probably because in reality all three terms are
> marketing speak and don't have real, verifiable
On 3/10/23 12:26, Lee Courtney via cctalk wrote:
Mainframe - Minicomputer = RAS and order magnitude better I/O
That I think is the best distinction from the minicomputer era.
Even within the same system architecture (e.g. VAX's) there were
machines that were solidly mini's and those that
On Fri, Mar 10, 2023 at 10:58 AM Chuck Guzis via cctalk <
cctalk@classiccmp.org> wrote:
> On 3/10/23 09:25, Christopher Zach via cctalk wrote:
> > Maybe. I've seen a lot of floppy rot on some of these rx50s. Black stuff
> transfers to the head then the head damages other floppies. Result is a
>
On 3/8/23 9:18 PM, Grant Taylor wrote:
I acquired an IBM PS/2 Model 80 (8580-071) today and am looking for
advice on what I should do to check it out before, during, and after
applying power for the first time.
After many comments here and elsewhere indicating that nothing should
smoke, I
A word of warning, the "inertial rotation" procedure was great for
smaller drives, but you may break your arm applying this to an ESDI
:-)
Not necessarily.
Not all ESDI drives are physically large.
In one generic PC, I used an ESDI drive, that I bought used, with a WD -7
controller. It was
In the next couple of months I'll be making a trip to within a half hour drive
of there. I've already contacted the seller to see if they could store that
VAXStation II for up to a couple of months so that I could pick it up on my
drive there. It's a 350 mile trip from where I live, but it
> On Mar 9, 2023, at 1:51 PM, Steve Lewis via cctalk
> wrote:
>
> Not to open a huge can of worms but...
>
> I always considered a mainframe to basically be a "fully decked out"
> minicomputer.
>
> A minicomputer has a core CPU and memory (or racks of memory), then is
> "decked out"
> On Mar 10, 2023, at 1:38 PM, Chuck Guzis via cctalk
> wrote:
>
> On 3/10/23 10:20, Bill Gunshannon via cctalk wrote:
>
>> The first mainframe I worked on was single user, single tasking.
>
> S/360 DOS provided for one "background" memory partition and two
> "foreground" ones. Batch
On 3/10/23 09:25, Christopher Zach via cctalk wrote:
> Maybe. I've seen a lot of floppy rot on some of these rx50s. Black stuff
> transfers to the head then the head damages other floppies. Result is a mess
> and I have to check heads on all new disks.
>
> Kind of like the tk50 tapes
On 3/10/23 06:14, Paul Koning via cctalk wrote:
>> Hub size looks small on the 1/2" for later style tapes. 2" tape? I wonder
>> if that was linear? Had to have impressive motors.
>
> Early on the hub specs tended to vary. For example, the EL-X1 10-track 1/2
> inch tape uses 1/2 inch
Maybe. I've seen a lot of floppy rot on some of these rx50s. Black stuff
transfers to the head then the head damages other floppies. Result is a mess
and I have to check heads on all new disks.
Kind of like the tk50 tapes
On March 10, 2023 11:52:29 AM EST, rescue via cctalk
wrote:
>
>If
I wouldn’t normally post anything on eBay, but this looks like something
someone should grab. I’ve no clue who the seller is, it’s in Massachusetts.
https://www.ebay.com/itm/295558572706
DEC Digital Equipment Corp VaxStation II GPX system with boards & T K70 untested
ebay.com
It is currently
On 3/10/23 10:20, Bill Gunshannon via cctalk wrote:
> The first mainframe I worked on was single user, single tasking.
S/360 DOS provided for one "background" memory partition and two
"foreground" ones. Batch submissions would be background, with some
installations using the smaller foreground
On Fri, 10 Mar 2023, Steve Lewis via cctalk wrote:
A revised TAKE #10 version of the video is here to clean up some aspects
(some notes in the Description; still DRAFT and unlisted)
https://www.youtube.com/watch?v=_eaolOAcvmg
The speech synthesis basically wrecks it for me, sorry.
g.
--
On 3/10/2023 11:52 AM, rescue via cctalk wrote:
If properly care for and stored, I'd be willing to bet that the 5.25"
floppies will be working after the flash replacements suffer bit rot
and data loss from charge depletion though I might not be around
to see that be a big problem :-)
A revised TAKE #10 version of the video is here to clean up some aspects
(some notes in the Description; still DRAFT and unlisted)
https://www.youtube.com/watch?v=_eaolOAcvmg
On Thu, Mar 9, 2023 at 1:39 PM Fred Cisin via cctalk
wrote:
> Most important of all, for the video,
> your daughter
On 3/10/2023 1:39 AM, Lars Brinkhoff via cctalk wrote:
Kind of yes, but recally early computers were often operated in batch mode.
Minis would typically do one task, or handle a few users.
The first mainframe I worked on was single user, single tasking and all
jobs were
submitted as
Thank you for catching the scam here. I saw an Apple Iie for $99 on the site
with a monitor and keyboard that is too good to be true. The site is complete
with fraud and bs.
Regards,
Tarek Hoteit
> On Mar 10, 2023, at 9:29 AM, rescue via cctalk wrote:
>
>
> Recently rejoined the list
On 3/9/23 2:24 PM, John Maxwell wrote:
Is there a repository to where I can upload diskette images?
As others have indicated, the Internet Archive seems to be an acceptable
place.
There are some other places that are more subject matter specific. The
A.T.C. comes to mind for IBM PS/2
Recently rejoined the list
saw someone mention that site
way too good to be true and with a bit of poking around looks
like most if not all are scraped right from eBay.
One item has the eBay price on the bryanipad.shop site crossed out and
the lower price added.
I
Mainframe - Minicomputer = RAS and order magnitude better I/O
On Fri, Mar 10, 2023 at 7:42 AM Paul Koning via cctalk <
cctalk@classiccmp.org> wrote:
>
>
> > On Mar 10, 2023, at 10:05 AM, Kevin Monceaux via cctalk <
> cctalk@classiccmp.org> wrote:
> >
> > On Thu, Mar 09, 2023 at 03:51:44PM -0600,
If properly care for and stored, I'd be willing to bet that the 5.25"
floppies will be working after the flash replacements suffer bit rot and
data loss from charge depletion though I might not be around to see
that be a big problem :-)
Don't toss your 5.25" floppies though :-)
> On Mar 10, 2023, at 8:44 AM, Sellam Abraham via cctalk
> wrote:
>
> A good resource for data on issues like this is the scans of old computer
> magazines or catalogs in either Google Books or the Internet Archive.
>
> Sellam
Good idea, just need to get my google-fu working right. :-)
On Fri, Mar 10, 2023 at 8:06 AM Zane Healy via cctalk
wrote:
> > On Mar 8, 2023, at 11:36 AM, Tom Gardner via cctalk <
> cctalk@classiccmp.org> wrote:
> >
> > I’ve worked on tape articles in Wikipedia and they are for the most part
> pretty good. If u find any errors or omissions I hope u will
On 3/9/23 22:14, Chuck Guzis via cctalk wrote:
Many folks have turned to emulators, abandoning the spinning rust
altogether.
Yup, my year-2000 pick and place machine had a 3.5" floppy
drive, but I had no confidence that any old disks would be
workable, and I had no other machines with drives
> On Mar 8, 2023, at 11:36 AM, Tom Gardner via cctalk
> wrote:
>
> I’ve worked on tape articles in Wikipedia and they are for the most part
> pretty good. If u find any errors or omissions I hope u will update
>
> If you are willing and able to share I’d like to see yr results
>
> Good luck
> On Mar 10, 2023, at 10:05 AM, Kevin Monceaux via cctalk
> wrote:
>
> On Thu, Mar 09, 2023 at 03:51:44PM -0600, Steve Lewis via cctalk wrote:
>
>> I always considered a mainframe to basically be a "fully decked out"
>> minicomputer.
>
> I've always considered a fully decked out
On Thu, Mar 09, 2023 at 03:51:44PM -0600, Steve Lewis via cctalk wrote:
> I always considered a mainframe to basically be a "fully decked out"
> minicomputer.
I've always considered a fully decked out minicomputer to be a fully decked
out minicomputer. :-)
> What do you guys think? Or is a
> On Mar 9, 2023, at 11:34 PM, Fred Cisin via cctalk
> wrote:
>
>> On 3/9/23 18:40, Sellam Abraham via cctalk wrote:
>>> I wonder how much challenge would be involved in making artisan batches of
>>> 5.25" or 8" floppy disks using cobbled-together or homemade equipment?
>
> On Thu, 9 Mar
> On Mar 10, 2023, at 2:30 AM, jim stephens via cctalk
> wrote:
>
>
>
> On 3/10/23 00:16, Chuck Guzis via cctalk wrote:
>> I believe that this photo shows a Datamatic 1000 tape next to a standard
>> 1/2" drive.
>>
>> https://i.pinimg.com/564x/00/3e/7d/003e7d4e3a2478db0b9a7c94f2033252.jpg
Floppydisk.com also sells 100 promotional disks (no working disks) for $12.
They also sell 5.25 nonworking ones with different colors that can be used for
projects. I think those would be nice for making art projects at schools,
mancaves, and home offices. Good coffee coasters like the old days
The mylar substrate would probably be the easiest. I don't know if
anyone's still making audio tape, but the coating equipment might be the
same. I don't know how to find the proper stuff for the goo, however.
ATR Magnetics (www.atrtape.com) and others still produce audio tape. They
have
(I think I prefer the original title of the video my daughter and I have
been working on - but still open to opinions about it)
Here is TAKE #10 (still AI narrated and a draft, but I found some Census
data that may be interesting and had some other revisions that I hope some
folks like!)
On 3/9/23 23:30, jim stephens via cctalk wrote:
>
>
> On 3/10/23 00:16, Chuck Guzis via cctalk wrote:
>> I believe that this photo shows a Datamatic 1000 tape next to a standard
>> 1/2" drive.
>>
>> https://i.pinimg.com/564x/00/3e/7d/003e7d4e3a2478db0b9a7c94f2033252.jpg
>>
>> --Chuck
>>
> Hub
On Thu, 9 Mar 2023, John Maxwell wrote:
Nowhere do I see any mention of a Model 80 Reference Disk. If you don't
have one of these, you will not be able to configure the machine. I
_should_ have a copy of one lying around (or already imaged/archived) -
https://ardent-tool.com/disks/
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