On 7/24/2024 3:31 PM, Zane Healy via cctalk wrote:
One of the comments identified it as having a PDP-11/02 CPU.
From the photos - the CPU card is a M7270 - LSI-11/2 (dual-height LSI-11).
-Rick
54-09728. That's burned into my brain.
(Literally dozens of ECOs)
-Rick
On January 13, 2024 12:21:52 AM EST, Paul Anderson via cctalk
wrote:
>Hi Ray,
>
>Do you just need the regulator? I think the part # is 54-09728 or 54-
>09827. I'll try to look it up this weekend.
>
>Paul
>
>On Fri, Jan 1
On 5/30/2023 11:11 PM, devin davison wrote:
That would make sense, as I picked up 3 RK05 drives in the lot.
Having looked at the entire set, just the first few are RK05 heads.
Rectangular white plug, and a metal shaft tail.
I didn't initially look at the full set and they're obviously from
On 5/30/2023 9:57 PM, devin davison via cctalk wrote:
I picked up boxes of these disk heads when i picked up a warehouse
stockpile of pdp 11 computers.
Any idea what they are to? I want to say floppy? I have 2 different types
of heads, in boxes. Please see pics, and if anyone needs heads, im th
On 2/26/2023 9:47 AM, Vincent Slyngstad via cctalk wrote:
On 2/26/2023 1:15 AM, jos via cctalk wrote:
On 25.02.23 18:52, silvercreekvalley--- via cctalk wrote:
Thanks Vince - I knew about the RX emulators but not the serial disk
- that sounds interesting. Is there any documentation on that - I
On 2/9/2023 5:40 PM, Doug Jackson via cctalk wrote:
At this point I will chime in.
They clearly went to the trouble of trawling through USPS tracking details
to find something that was shipped from near their suburb to Sydney
Australia by somebody else and submitted it as their evidence th
On 6/1/2022 12:49 AM, Glen Slick via cctalk wrote:
No one ever called it a "Digital Ethernet Personal Computer Bus
Adapter", just a DEPCA. I never previously knew that there was any
meaning behind the DEPCA name.
Yes, that's what it meant. "DELNI" - Digital Ethernet Local Network
Interface. "D
On 5/15/2022 4:16 AM, Eric Smith via cctalk wrote:
On Sat, May 14, 2022, 16:09 ben via cctalk wrote:
On 2022-05-14 11:50 a.m., Nigel Johnson Ham via cctalk wrote:
AFAIR LS can only drive one unit TTL load.
paul
LS is 4 TTL, 4 ma low.
Was there a trick of forcing the output of D flip fl
On 4/3/2022 10:01 AM, Will Cooke via cctech wrote:
On 04/03/2022 8:34 AM Magnus Ringman via cctech wrote:
On Fri, Apr 1, 2022 at 10:26 PM Marc Howard via cctech <
cct...@classiccmp.org> wrote:
We need to onshore Nixie production now! ;-)
Gentle plug forhttps://www.daliborfarny.com/.
I go
On 3/12/2022 3:20 PM, David Schmidt via cctech wrote:
I have some disks that look like they're from a DECmate II computer,
standard RX50K drives. The disk images all look like they're a mix of
12-bit (OS/78 or OS/278?) and 8-bit all on the same media. I can't
convince PUTR to make sense of the
Those red cables appear to be SDI - maybe that spot was an RA80/RA81?
The boards appear to be correct for a UDA50 (M7485/M7486, but it's hard
to make out the board numbers).
-Rick
On 12/2/2021 11:37 AM, Josh Dersch via cctalk wrote:
On Thu, Dec 2, 2021 at 6:29 AM pbirkel--- via cctalk
wro
Height 27.38 mm (1.07 in)
Diameter 13.36 mm at the base (closed end), 13mm at the open end (hard
to measure as it's easily deformed).
Ear slots 5.5 mm wide
Ears 2.17 mm wide, 11.3 high (the tooth-shaped part only).
-Rick
On 4/19/2021 2:14 PM, Seth J. Morabito via cctalk wrote:
Malte Dehli
On 3/21/2021 10:05 AM, Kyle Owen via cctalk wrote:
On Sun, Mar 21, 2021, 09:35 Rick Murphy via cctalk
wrote:
You have to read the bootstrap code in the TC0x driver to understand this.
I agree with your assessments, but I'm referring to the first stage
bootloader: either your toggle-
On 3/20/2021 8:51 PM, Kyle Owen via cctalk wrote:
On Sat, Mar 20, 2021 at 7:19 PM Kyle Owen wrote:
However, it appears as though word count will be hit by the loading of the
first block. In fact, my instrumented version of SimH says it's overwritten
with a zero. If that's the case, it would se
On 3/20/2021 8:51 PM, Kyle Owen via cctalk wrote:
On Sat, Mar 20, 2021 at 7:19 PM Kyle Owen wrote:
However, it appears as though word count will be hit by the loading of the
first block. In fact, my instrumented version of SimH says it's overwritten
with a zero. If that's the case, it would se
On 1/4/2021 5:40 PM, Chris Zach via cctalk wrote:
Can someone check to see if a RQDX2 used the Western Digital chips to
interface to MFM drives?
There's certainly nothing obviously Western Digital.
The board has a bunch of 74LS logic, several PALs, two 27128 EPROMs for
firmware, and one 40 pi
On 11/27/2020 6:07 AM, Tom Hunter via cctalk wrote:
Hi Dave,
Thanks for Bob Armstrong's old email.
I have not seen Jim's VHDL code, but I am quite confident I can fix this.
Tom Urban wrote that the IOB6120 is misbehaving, so I will have to do some
fault finding or debugging anyway.
I would appr
On 4/9/2020 6:10 PM, Bill Degnan via cctech wrote:
On Thu, Apr 9, 2020, 6:01 PM David Gesswein via cctech <
cct...@classiccmp.org> wrote:
Thank you David. I was able to load the .SV file instead, but I am glad I
now know what was needed. I think in my pdp 11 I have the same issue.
Bill
For
On 4/8/2020 6:58 PM, Richard Sheppard via cctalk wrote:
I’m just going to guess (I have no experience with this architecture) – would
that mean either file corruption – or possibly the last record needs to be
padded out with “empty” blocks to be the same size as the others?
What are you doin
On 6/4/2019 12:54 AM, Marc Howard via cctech wrote:
How do you run TCBASX.DG (TC01 Basic Exerciser) and TCRANX.DG (TC01 Random
Exerciser)?
When I run TCBASX.DG it almost immediately halts. Pressing makes the TC08
controller lights grind but no tape motion. TCRANX.DG is basically the
same.
Is
On 3/12/2019 2:23 PM, Kenneth Moser via cctech wrote:
I have one, with some disks and other misc gear. Headed for the dump if I
cannot find a home. Would prefer to find a home for my old friend...
Ken Moser
703.587.3868
Ken,
Where are you located? I'm in Fairfax County (Annandale).
-R
On 12/7/2018 7:20 PM, Thomas Moss via cctalk wrote:
Hi All,
I have a PDP-8/e that's missing the knob on the front panel.
Does anyone have a spare for sale, or know of a compatible part?
Do you mean the knob that selects which data to display on the panel lights?
Got one, bit dinged up but us
On 9/25/2018 3:39 PM, Mattis Lind via cctalk wrote:
I could use a RL02 or RL01 head as a trade if someone is interested.
I have two boxes which if I remember right have a pair of RL01 heads.
They were pulled from a RL01 drive that I converted to a RL01 1/2 (swap
heads, electronics, etc. to ma
On 9/23/2018 9:59 PM, Kyle Owen wrote:
I've been informed that "set cpu noeae" will disable the EAE.
I just tried that:
Simulation stopped, PC: 01210 (JMP 1207)
sim> show cpu
CPU, idle enabled, stability wait = 20s, 32KW, no EAE
sim> c
R F4
*FLOAT/G$
1.02 1.02 0.00
2.0
On 9/19/2018 6:43 PM, Kyle Owen via cctalk wrote:
At VCF MW this past weekend, I was playing around with an FPP8/A stuffed
into a PDP-8/M with a fan removed. This hex-wide two-board set will happily
work in a quad-wide backplane, as it needs no signals that an 8/A would
otherwise provide.
I want
On 9/6/2018 1:15 PM, Paul Koning via cctalk wrote:
On Sep 6, 2018, at 1:09 PM, allison via cctalk
wrote:
Mostly about screen memory which back then was small and not cheap.
True. Did the VT05 use core memory for that? I vaguely remember it did.
The VT05 used a shift register bank for the s
On 8/31/2018 8:35 PM, Cameron Kaiser via cctalk wrote:
Trying to restore an Alpha Micro ColdFire-based system, and it's missing
its cache SIMM. It works without it, but it sure would be nice. AM doesn't
have much info on it but it appears to be a 72-pin 64KB SIMM (unknown
speed), same keying as 7
On 2/21/2018 5:14 PM, Paul Koning via cctalk wrote:
Ok, then it could be for VMS, which also does this (via Andy's unsupported
driver). I don't know of PDP-11 or other minicomputer systems that do DECtape
overlapped seek. I suppose it could be for artistic verisimilitude...
TSS/8. It was a
On 6/17/2017 4:04 AM, Rob Jarratt via cctalk wrote:
On 06/16/2017 09:04 AM, Ed Thierbach via cctalk wrote:
BACKUP/IMAGE might work. I have a dim recollection of moving system
drives around that way, but it's been a few decades. :-)
I have cloned drives that way for VMS systems. Backup/image i
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