> From: Mattis Lind
> The M7270 board has the following chips:
> 1611H 21-15579
> 3007D 23-002B5
> 3010D 23-001B5
> 2007C 23-002C4
I have two M7270s (haven't checked to see if either one works, yet - need a
working chassis with an 18-bit backplane, too lazy/busy to pull the removable
terminations on my working Sigma Q22).
which is fairly different from yours; the date codes range from 8018 to 8021
on the uROMs, and 8029 on the ALU.
which is intermediate between yours, and my first one (but does seem to
indicate that to some degree, these things could be mixed, they aren't
matched sets). The date codes from the ROMs are 8026, 8041 and 8126, and 8031
on the ALU (so the 002 2007C is later than the 003...)
These are my personal machines. There is just no more room in the
rack for everything I have now. Plus, I would really like to be
able to get to the exercise machine again :-)
These are 4U dual-processor machines, I think 933MHz each and 4G RAM
each. If it really matters I can fire them up and go check. They
were both working when last powered on a couple of years ago. (fwiw,
the company I work for routinely scraps these, as no one wants to pay
for shipping, so I know they're not worth much.) And, if you don't want
to run code on them, I will note they make fantastic room-heaters :-)
They are known to run FreeBSD.
I also have some other stuff that is going to scrap unless someone
really wants it. And by "stuff" I mean "junk".
3-4 Sun Netra T1 105s, maybe working, maybe not
2 HP DL360 32-bit machines, actually I have already pulled the pieces,
but just in case ...
several caddies and blanks for the above
3 Dell PowereEdge 2550s. Dual P-III 933MHz. I have caddies.
These are free for anyone who wants them. I can deliver in the Austin
area -- but, my car can only hold 4U at one time so if you want more than
that you will have to come get it.
I will hold on to the Suns for a bit, but the rest I'd rather scrap in
the next week or so.
I got a VAXstation 4000 Model 96 yesterday. Before I switch it on I want to
test the PSU (H7819) on its own, check it for ripple etc.
However, I can't find the pinout of the power connector. I don't want to
switch it on with no load, to try to work out the pinout.
Does anyone have this information?
I have been browsing through some of my old Qbus boards and found one
KD11-F (M7264) CPU with 4 k word memory, a couple of KD11-HA (M7270) , a
KDF11-A (M8186) and some assorted memory boards and some SLUs.
All CPUs seemed to work except for the KD11-F board, which was a bit sad
since that was the original LSI-11 board.
I looked at bitsavers for schematics. Indeed there was one, but my board
revision seems to be older. It is not matching layout wise and it has
plenty of patches. Is there a print set for the older revision of the board?
Well, I am not giving up that easy. The clock signal was there so I
attached the logic analyzer over the control chip and was able to find out
the micro address (sampled at falling PH2 clock) and data (sampled at
falling PH1 clock). The strange thing was that it was not starting at
address 1. It starts of at 89 hex, then steps to 8A and then to 39D. The
data returned is FFFF, FFFF and 708A (forever).
FFFF is supposed by NOP. 708A is also some other valid micro instruction.
(according to the EK-KUV11-TM_LSI11_WCS.pdf
Is the micro code source / dump for the LSI-11 available somewhere?
If I remove one of the MICROMs it starts at 1 and goes on 2,3,4,5,6, etc.
My guess is that one of the MICROMs are bad, forcing some bits low. Or
maybe the strange precharging isn't working?
Now, I have several M7270. I could sacrifice one board to get the other
working. But are the chips identical? The markings on the chips are not
The M7264 board has the following chips:
The M7270 board has the following chips:
Is there a engineering drawing printset for the M7270 (KD11-HA) somewhere?
For some reason I got it in my head that writing an AT&T 3B2 emulator
might be a good idea. That idea has pretty much been derailed by lack
I have been unable to find any detailed technical description of any
3B2 systems. Visual inspection of a 3B2 300 main board reveals the
following major components:
- WE32100 CPU
- WE32101 MMU
- 4 x D2764A EPROM
- TMS2797NL floppy disk controller
- PD7261A hard disk controller
- SCN2681A dual UART
- AM9517A Multimode DMA Controller
How these are addressed is anybody's guess.
To even dream of doing an emulator, I at least need to know the system
memory map -- what physical addresses these devices map to. Without
that it's pretty pointless to get started.
If anyone has access to this kind of information, please drop me a
line. Otherwise, I'll just put this one on the far-back burner!
On 28/11/2014 at 02:23, Jim Brain wrote:
> I know this is not an electrical forum, but I thought perhaps someone
> has seen what I am looking for.
> For an application, I am looking for a relay that is connected to 12V
> through a switch, with the switch voltage also going to the middle of
> a SPDT relay contacts.
> * If I energize the latch once, for the time the button in pressed,
> the relay flips "on" and the middle relay contact sends power to the
> NO contact
> * If the energize the latch a second time, for the time the button is
> pressed, the relay flips "off" and the middle relay contact sends
> power to the NC contact.
> The circuit works with an open relay of the kind they used to use in
> garage doors (push button once, and door goes up, second press makes
> it go down...) But, we need a sealed relay to beat the weather (it's
> for a lineman's bucket truck we own).
> Simulating this with some electronics and two relays won't work (well,
> it would work, but it's for my father, and he really wants a
> electrical/mechanical relay solution, like he has, but weathertight).
> I thought for sure there was such a thing as a D-type FF in relay
> format, but all of the magnetic and mechanical latching relays I see
> online use two separate coils to operate, which means two switches,
> and that won't work (no more signal paths available in this application).
> I must not know what to call what I am looking for, and was hoping
> someone had a better name for this type of thing or a suggestion of
> where to look...
I have come across a relay like this controlling the door of a bus. One push
to make switch, push once to open, push once to close. The bus schematics
called it an "impulse relay". This is East of the Atlantic - who knows if they
they call it the same thing where you are. The one I came across was 24V
rather that 12V too.
(There were no classic computer systems on the bus, unless you count the
radio system which allegedly tracked the bus location and radioed it back
to the controller. It counted pulses from the speedometer/odometer
tachogenerator and did 4 bit BCD arithmatic on them using 4000 series CMOS.)
Does anyone happen the manuel for the facit 4042 punch/reader
prod 9280 3111, looks a bit like the 4047 but is has no
display/keyboard, and turned 90degres.
Has two IEEE-488 connectors, one of which is on an expansion board with
dip switchs to set addres.
Jacob Dahl Pind | telefisk.org | fidonet 2:230/38.8
I went looking for MSCP docs and found a PDF holding scans
of a copy of version 1.2 (April, 1982) of DEC document AA-L619A-TK
("MSCP Basic Disk Functions Manual"). It had some of what I wanted.
I've now done a conversion to text and manually checked and cleaned up
the result. But I'm not sure whom to offer the resulting text file to.
I don't know where I got the PDF; my notes give
http://www.microvax.org/awx/computers/VAXen/l619atk.pdf as places, but
neither of those is accessible now - vt100.net returns an "I'm moving,
stuff may be offline" page, and www.microvax.org gives ETIMEDOUT. And
my wetware memory doesn't help me any.
Anyone want a copy, or care to suggest where I should mail it?
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Does anybody have binary or hex dumps of the (E)PROMs from any AT&T
3B2 variant? I would be very interested in examining them if you do.
I'm looking especially for any (E)PROMs from the 3B2 Model 400 or the
3B2 Model 600, but frankly I'd be happy to get all and any I can find.