I have some 1355 drives, among others,but don't recall the difference. I am
also having sys problems, so feel free to call me if you have any questions.
Thanks, Paul
217-586-5361
On 4/5/07, Zane H. Healy <healyzh at aracnet.com> wrote:
>
> At 11:02 PM -0400 4/5/07, John Kourafas wrote:
> >Also looking for a Micropolis 1325 MFM Drive, 71/80MB , I've seen
> >both the ST506 and Mic. 1325 on eBay for like 600.00 which I think
> >is crazy...
>
> A Micropolis 1325 MFM drive is a DEC RD53. The reason they go for so
> much is because there are systems still in commercial use that need
> these drives.
>
> Zane
>
>
> --
> | Zane H. Healy | UNIX Systems Administrator |
> | healyzh at aracnet.com (primary) | OpenVMS Enthusiast |
> | MONK::HEALYZH (DECnet) | 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/ |
>
I am working on the reset circuit of an HP9816 computer. The output side
is rrlatively conventional, but it takes an input from a chip that I
can't identify.
The chip is a 16 pin DIL package marked with the HP house-number
1858-0054. That's not in my equivalents list. The chip seems to have been
made by RCA, and tracing the connections to it show that 2 of the pins
are grounded, but none of them go to any power line. I susepct it's a
transistor array, therefore (HP1585-xxxx numbers tend to be transistor
arrays too).
I've unsodered the chip, but trying to work out the internal arrangement
is non-trivial, partly because there seem to be parasitic diodes, and
secondly because I am not convinced it's just transistors brought out to
the pins. There may be a long-tailed pair, for example. It doesn't match
any of the arrays in my RCA databook.
As I said, it's on the main processor board (the big board at the bottom)
of an HP9816 computer. It's U115 on this board, at the front left corner,
just behind the 16MHz clock oscillator can.
Does anyone have any suggestions as to what it might be? Anyone have an
HP9816 with this IC labelled with somethign other than an HP house number?
-tony
My closet is full, and its spring-cleaning time.
This unit needs a fuse / fuseholder, but as I recall, it did boot when
I jury-rigged one. It is a little scratched, and a couple keycaps are
loose, but otherwise complete.
Contact me off-list to arrange pickup.
Regards,
Mo
____________________________________________________________________________________
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Just curious, "back in the day" I touched a *lot* of 3 1/2" ST412 style
drives, mostly 10mb and 20mb.
But these days I never see them. All the drives I see on ebay and elsewhere
are 5 1/4" monsters.
Any idea why? I'd love to have a handful of 20mb 3 1/2" drives to use
for various things but I never see them.
I'm talking about drives from Rodime, Seagate, Lapine, etc... cerca 1985.
-brad
> Did a copy of this x86 Mac OS ever leak out onto the net?
>
> Curt
>
>To the best of my knowledge no. As far as I know this was never seeded to
>developers.
>
>OTOH, Rhapsody with the classic Mac OS interface was seeded. I forget if it
>was DR2 or DR3 that first sported the Aqua interface, and the first
>Developer release or two only ran on x86 boxes. The "Prelude to Rhapsody"
>release first given out an the WWDC and then sent to developers was stock
>OPENSTEP 4.2 and while intended to run on x86 could apparently also be
>loaded on NeXT 68k systems as well as the correct HP PA-RISC or Sun Sparc
>systems.
>
>One of these days I'd really like to boot OPENSTEP on a Sparc 5. It should
>just be a matter of finding the time. Which translates to finding an
>actual reason to make the time. :^)
>
> Zane
Incorrect, If you look at some of the less scrupulous segments of the
web you can find a copy of OSX that runs on x86
For example check out http://wiki.osx86project.org/wiki/index.php/Main_Page
As a warning if you are planning on actually obtaining a copy somehow,
it will be a DVD sized image (think about 4GB)
-Josh
Hi all,
Some of you asked me for VCF East hotel info. We now have a room block at
the Courtyard Tinton Falls, for the evenings of Friday, June 8 and
Saturday, June 9. The address is 600 Hope Rd., Tinton Falls, N.J., just
down the street from last year's hotel. The Courtyard is much nicer,
however it's also pricier -- single rooms are $159 per night.
Unfortunately the much cheaper Holiday Inn which we used last year is
booked already (wedding season, beach season), as are similar local
places.
Full details are at http://www.vintage.org/2007/east/lodging.php ... make
sure you ask for the Vintage Computer Festival rate.
- Evan
PS - I'm signing the contract tonight so wait until Monday.
> Also any spare parts from these systems.
Watch eBay. there have been a bunch of these dumped onto the market
there recently.
There is a group at the Computer History Museum who were ex Convergent
Tech folks trying to find docs and software as well for this family
of systems. Sadly, very little has surfaced.
There is a book called "Exploring CTOS" that you may be able to find.
http://www.geocities.com/SiliconValley/Pines/4011/
has a bit of info as well
>Date: Thu, 5 Apr 2007 20:57:00 -0800
>From: "Zane H. Healy" <healyzh at aracnet.com>
>At 11:02 PM -0400 4/5/07, John Kourafas wrote:
>>Also looking for a Micropolis 1325 MFM Drive, 71/80MB , I've seen
>>both the ST506 and Mic. 1325 on eBay for like 600.00 which I think
>>is crazy...
>
>A Micropolis 1325 MFM drive is a DEC RD53. The reason they go for so
>much is because there are systems still in commercial use that need
>these drives.
>
>Zane
For what it's worth the ST506 was stock in some model of Packard Bell
80286 machines. So, if you run across any of those dinosaurs which
have not been scrapped, crushed and melted, they could be a source.
Back in the early 90's I upgraded our data entry staff's computers
with new guts and the ST506 is what I was pulling out of them. If I
had only known to hold on to the old drives...
Jeff Walther
On 4/5/07, Zane H. Healy <healyzh at aracnet.com> wrote:
>
> Let's see NT supported x86, Alpha, MIPS, and what was the other
> family?
PowerPC
They all got dumped out in the hallways and hauled away when support
was dropped.
-Glen
