This system may not be 10 years old, but hopefully someone can answer
this for me anyway...
Quick one here. I have one of those EB64/PC64 motherboards, but only a
200MHz CPU for it. Problem is, the board is set up for a 266MHz CPU. Has
anybody overclocked a 200MHz CPU to 266 in one of these? With
appropriate fans for good cooling, of course.
Also, these boards can run off of a regular AT style power
supply, correct?
--
--- Dave Woyciesjes
--- ICQ# 905818
By my fault. By my fault. By my grevious fault. Please disregard my blather about the need for the IBM whatever 60. I was the middle-man for a restauranteer whose point-of-sale computer had gorked and jumped to you guys without viewing his layout. Turns out it was a dinky running PC Dos. His 30 employees have been using scratch pads. Forgiveness is begged. .. harry ..
>
> From: Al Kossow <aek(a)spies.com>
> Date: 2003/08/29 Fri PM 11:01:21 EDT
> To: classiccmp(a)classiccmp.org
> Subject: Re: IBM 60
>
> The IBM 360/60 was never really a product.. try again.
>
> --
>
> > BTW, weren't the 360/60 and 360/62 as evanescent as the 64 and 66? And wasn't there
> > a 360/70 that also quickly disappeared?
>
> The original lineup was the 30, 40, 50, 60, 62, and 70, with a vague promise of a 92.
>
> The 60 and 62 were the same CPU (2060), but different core-memory units (2360 and
> 2362). The 70 used hardware similar to the 60 and 62, but was all hard-wired, with no
> microprogramming, and used the superior 2362 core.
>
> The original S/360's took a long time to be delivered, and, a year later, some of the
> hardware specs were no longer competitive. The 60 was dropped altogether, and the 62
> and 70 were replaced by the 65 and
> 75. Out of them all, only one 62 was ever shipped to a customer. At the same time,
> the 92 was dropped, to be replaced by a vague promise of a "90 series", later
> realized in the 91, 95, and 195. It was also about this time that the original
> 2.0-microsecond 30, with lights in the front like the other 360's, was largely
> superseded by the 1.5-microsecond
> 75(1), with lights behind a flat panel like a 1401; though the
> 76.-microsecond version was never officially discontinued, and was shipped in large
> enough numbers that there were 2.0-microsecond 22's offered (the 22's were
> reconditioned 30's, offered while the 370/115 and
> 77/125 were not yet ready), it was rare (I never saw one).
>
> But in the meantime, the need for large-scale timesharing had resulted in the
> announcement of virtual-memory versions of the 60 and 62, to be called the 64 and 66.
> As part of the same restructuring, these were withdrawn a month after they were
> announced, to be replaced with the 67.
>
> Of the original April, 1964, 360's, only the 40 and 50 ended up being shipped in
> large numbers.
OK, I'm working in unfamiliar territory... and since there seem to be a lot
of video experts of late, this seems like the time and place to ask...
I'm working on an H-89 that seems to have a problem in the horizontal drive
on the video board. The unit powers up from cold to a good display,
properly sized, and stable. After the unit operates for 10-15 minutes, the
video breaks down, first by jittering slightly for 30-60 seconds, then it
goes to a single vertical line on screen that fades to black. At this time,
the filament on the CRT also stops glowing. If I leave the unit off for
20-30 minutes, it comes back with good video for a bit, then repeats the
above. If I turn the unit back on right away without a cool down, there's
no display/no filament glow.
After tracing the (good) horizontal output signal from the terminal logic
board into various part of the video board, and checking voltages where I
felt I could reach safely in a hot set, I discovered that if I shot
horizontal output transistor Q217 with cold spray I'd get video back right
away.
This unit is the one I posted about on cctalk a few days ago with the NOGDS
board... when I got it, it had a AA battery inside for a clock board that
leaked down onto the flyback transformer. The leak didn't appear excessive,
and most of the "material" on the flyback must have dried long ago and was
brushed away easily, leaving only a slight tarnish on the aluminum heatsink
it's mounted to.
My questions...
1) Although the flyback _appears_ OK, could the leak have caused some unseen
damage that is now causing excessive current through Q217 and shutting it
down? My limited understanding of flyback construction is that they are
sealed units. It takes several minutes (10-15) before the failure is
observed. Could a flyback failure allow operation for this long? How do I
test this thing?
2) If I proceed under the assumption that the flyback is OK and Q217 is
not... Q217 is a BU500: 1500V, 6A, 75W, SI-NPN. I normally buy from Mouser,
DigiKey, and Jameco, but none of them seems to have this part, and I wasn't
able to turn up anything useful Googling. A possible dealer or two in the
UK, but for a $2-3 part I was hoping for a more-readily-available source or
an equivalent. The closest I can find in the family is BU508A, which is
1500V, 7-8A, 120-125W (depending on whose specs you believe). Is that OK or
too far out of spec? Does anyone know of US source for the real McCoy?
Thanks for any help/advice! --Patrick
I think I've come up with something that will work.
The outer and inner cross section of the roller is .7" and
.5" so I dug around at Weird Stuff to see if any old DC2000
drives were close. The Colorado 250 appears to be, and with
a bit of work with a small flat blade screwdriver I was able
to remove the rubber from the .5" shaft. Now, I need to clean
the goo out of one of the MCD-40 mechanisms and try it.
This may be a workaround for the HP's as well. If someone has
a caliper handy, I'm curious what the cross sections are for
the roller in that.
What is the best way to store the clear blue plastic boxes full of DEC fanfold papertape? I'd been laying them flat, but that takes up quite a bit of space. I was wondering if it's safe to put them in a bookcase like a book, but I got to thinking this probably isn't a good idea for the papertape.
Zane
--
--
| Zane H. Healy | UNIX Systems Administrator |
| healyzh(a)aracnet.com (primary) | OpenVMS Enthusiast |
| | Classic Computer Collector |
+----------------------------------+----------------------------+
| Empire of the Petal Throne and Traveller Role Playing, |
| PDP-10 Emulation and Zane's Computer Museum. |
| http://www.aracnet.com/~healyzh/ |
Joe <rigdonj(a)cfl.rr.com> wrote:
> > BTW I have finally managed to get a 98155A keyboard for my 9915's
> Congradulations! Where did you find it? It took me years to find one.
On eBay, for $35
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2748063348
as you can see I used the Buy Now option, and not a moment too soon,
the seller told me that he had higher offers from others that came
late.
> GREAT! I've been looking for those for years. The only one that I have
>is for networking the 9915s.
Do you mean the system for making backup tapes with a bunch of
9915s connected via HP-IB? Do you have the s/w for that pac?
-----------
"Jay West" <jwest(a)classiccmp.org> wrote:
> What about the 9122?
you'll need the EMS ROM for that one.
> I'm hoping it would work with the 9122, which is what I want to get for my
> 1631D. The only reason I'm hunting for 9122 instead of 9121, is I thought
> the floppy disks for the 9122 might be easier to find (they DO use different
> media right?)
The difference between the 9121 and the 9122 is that the former is single
sided and the latter double. Apart from that they both use the DOUBLE
density format which is different from the QUAD density PC floppies.
So while you gain in capacity with the 9122, you still need to find these
floppies.
BTW note that while the 9121 is very reliable, there are quite a few
9122s with damaged heads. This has to do with the disk loading mechanism
that gets stuck with age and if the user forces the diskette in, it
hits one of the read/write heads.
> Thanks for the tip!! I don't have too many old DECtapes, but when you say
> old 40mb PC tape drive tapes, are you talking QIC-80 tapes? I have tons of
> those. If not, exactly what tape do I go buy?
CAREFULL! The HP-85 tapes (and the DECtapes) are NOT the same as the
QIC-80 tapes. They look the same, to the extent that I was trying to
insert one and getting annoyied when it wouldn't go in.
> I saw note of that on your website. That would be soooooooo so nice to have
> n ROM emulator. Humm there can't be THAT much to the electronics inside the
> 2929A. Anyone have one they'll let me take apart and build a copy of?
Actually its not that complex. If you look at
http://www.series80.org/Manuals/HP82929A.pdf
you will see that most of the chips deal with address decoding. You can
replace most if not all with a microcontroller (e.g. PIC).
BUT, (there has to be a but, otherwise, I would have already pointed
you to a page that tells you how to build one :-) The HP-85 bus is
not TTL. I think the logic true is +6V and the clocks are like +12V.
So you need more than a PIC. Like I said, its in my TODO list.
Having said that, relocating the ROM executable may actually be easier.
But (there's that word, again) when I tried to look at the CPU
architecture, I freaked out. What the **** were they doing back then.
This CPU is totally wierd, so understanding what is going on with
that thing will take some effort.
Anybody who knows/remembers HP-85 assembly? :-)
**vp
I have the beast om my desk here:
The 9825A has option 002 installed (23228bytes op mem) and has 2 modules in
its option slots
a 98216A module and a 98210 module
It powers up and seems to do the basic calculations (1+1=2) :)))
On the back is a sticker: Part of 5046A system (never heard of)
there are also 3 expansion module like bays in the back - all of them empty
-----------
The 9826 unit that came with it powers also up but seems to ask for a disk
This unit looks like disk os based - is there anything more to find about
it?
Luc
-----Oorspronkelijk bericht-----
Van: cctalk-admin(a)classiccmp.org
[mailto:cctalk-admin@classiccmp.org]Namens Joe
Verzonden: woensdag 27 augustus 2003 12:50
Aan: cctalk(a)classiccmp.org
Onderwerp: Re: HP 9825A rescue?
At 01:36 PM 8/28/03 +0200, you wrote:
>Hi Folks,
>
>I am not familiar with the old HP calculators.
>The local junkyard has a HP 9825A desktop calculator they can't sell
>They intend to demolish it next week - is it worth saving it? or is the
>world full of it?
Why can't they sell it?
>- is it worth saving it?
Yes but it sounds like you don't have any choice.
>or is the
>world full of it?
They're relatively common in this area but I'm close to several large
military contractors and Kennedy Space Center and they use a lot of them.
But they are neat machines and seem to run forever. It's probably one of
the best machines that HP ever built IMO. They run a OS/language called
HPL. It's a cross between APL and BASIC. Lots more details on my website at
<http://www.classiccmp.org/hp/hpdcalc.htm>.
What model is it? Open the paper cover and see what options it has.
Joe
>It looks complete and has only some minor estetic damage.
>
>gr.
>
>Luc Vande Velde
>
>
>-----Oorspronkelijk bericht-----
>Van: cctech-admin(a)classiccmp.org
>[mailto:cctech-admin@classiccmp.org]Namens Fritz Chwolka
>Verzonden: donderdag 21 augustus 2003 17:05
>Aan: cctalk(a)classiccmp.org
>Onderwerp: Re: Anyone have copy of old BBS software
>
>
>On Thu, 21 Aug 2003 10:05:25 -0400, Cini, Richard wrote:
>
>>Hello, all:
>>
>> Does anyone have a copy of some old BBS software for the PC
>>platform, like WildCat, that I could get a copy of? I'd like to do some
>file
>>transfer testing among my classic platforms and thought an internal BBS
>>would be a clean way to do it.
>>
>> Thanks.
>>
>>Rich Cini
>
>Why don't use telemate, procomm or zock and use their internal host
>like personal bbs ?
>
>BBSen even here
>
>http://www.eunet.bg/simtel.net/msdos/bbs.html
>
>and here look for telix or telemate
>
>http://www.vectorbd.com/bfd/telecomm/
>
>
>
>Greetings from
>Fritz Chwolka
>
><collecting old computers just for fun>
>> www.alterechner.de <
I am just back from the junkyard
I've got the HP 9825A and they added a HP 9826 too - all on take them, test
them and let me know if you want them... conditions
I'll have to scan the internet for this 9826 machine now - is this a
calculator or already a small computer?
Display looks larger and it has a 5 1/4" floppy drive build in
Luc
If you're one of those people who wants a PDP-8 but can't find one, don't
despair - you can always build your own! The SBC6120 is a complete PDP-8
built around the venerable Harris HD6120 CPU and modern programmable logic
devices. All parts used except the 6120 are contemporary, easily available
devices.
The entire system fits on a PC board 6.2" by 4.2" and has approximately the
same footprint as a 3.5" hard disk. The SBC6120 has 64KW RAM, 32KW EPROM,
a true KL8/E compatible console terminal interface, and a standard IDE/ATA
disk interface. OS/8 device handlers are available for IDE interface, and
the system will run standard OS/8 V3D. There's even an expansion bus so you
can design and build your own daughter cards to plug into it.
To find out more, visit the SBC6120 web page at
http://www.SpareTimeGizmos.com/Hardware/SBC6120-2.htm
Last fall, a group of about 30 people got together to order parts and
PC boards for the SBC6120, and the results were better than I ever hoped.
So far as I know, every one who assembled their SBC6120 got it working
(a few people still have theirs on the shelf, unassembled, I'm afraid!).
Some people even designed peripherals for it, such as Jim Kearney's cool
I/O board which allows you to use a standard VGA monitor and PS/2 keyboard
as a VT-52 substitute.
http://www.jkearney.com/sbc6120/iob6120.htm
And perhaps the best of all, we're now beta testing a real lights and
switches front panel for the SBC6120. Visit
http://www.sparetimegizmos.com/Hardware/SBC6120_Front_Panel.htm
for a preview!
Even now I still get enough inquiries about the SBC6120 that I have decided
to purchase another run of PC boards and 6120 CPU chips. There's a fully
assembled unit available on eBay now,
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2750838322
and Spare Time Gizmos is now selling bare PC boards, two different partial
kits, and a complete kit at
http://www.sparetimegizmos.com/Hardware/SBC6120_Orders.htm
If you wanted to have your own PDP-8, then here's your chance!
Thanks,
Bob Armstrong
