A couple of comments on a number of things touched on in this thread:
> From: Nigel Johnson Ham
> Ah, well there you see the end of my technical knowledge.
My observation is that since varying QBUS PDP-11 CPU's can be swapped in and
out (unlike UNIBUS PDP-11's, where the CPU's backplane and front panel are
not interchangeable between models), and QBUS machines were therefore often
upgraded over their lifetime by switching in a CPU, when starting out with a
new machine, one should _always_ start by working out what kind of QBUS
backplane one has, and going from there.
The BA23 is the one that's part Q/CD and part Q/Q.
> No, I don't know if the CPU is good (it is a dual-width KDF11-A btw),
> I do have an 11/73 dual width board arriving tomorrow
> it is crashing into ODT and not accepting input from the console, which
> I remember was a symptom of no bank 0 memory.
That's true of all LSI-11's (and it threw me for a while when we first ran
across it), but KDF11-A's and KDJ11-A's work fine with _no_ working memory in
the machine: i.e. just a CPU board and a console will work fine (as in, ODT
works, and one can examine what few registers are on the bus).
(I had previously fried the KDF11-A; just tried the KDJ11-A. Probably the
KDF11-B and KDJ11-B work too, but I'm toolazy to try them at the moment.)
So if a machine with _just_ a CPU and console doesn't work, you've got a
problem; but it shouldn't be too hard to find it, with only two boards.
> From: Joshua Rice
>> "many boards designed for Q/CD slots (such as PMI cards) do not avoid
>> the QBUS pins on the CD connectors which contain 'hazardous' (to TTL
>> circuitry) voltages."
I should note that that text is somewhat questionable; I recently checked the
list of PMI pins, and I didn't see any that conflicted with 12V pins on Q/Q
slots. But definitely plugging a PMI card into a Q/Q slot will damage it:
MicroNote 28 says "MSV11-J MODULES CAN[NOT] BE PLACED IN A Q/Q BACKPLANE
SLOT. IF THIS IS ATTEMPTED PERMANENT DAMAGE WILL BE DONE TO THE BOARDS".
> From: Jerry Weiss
> I don't believe ODT is dependent on working memory.
On LSI-11's, it us. Location 0 must respond to a read cycle, or the
CPU will spin trying to read it, _before_ ODT will start.
I'd like to find homes for:
22 x 11" reels
5 x 9"
2 x 7"
Most rated up to 6250bpi, a handful to 3200bpi. Some CONTROL DATA
branded, rest mixed brands. All in decent condition.
Located: Toronto Canada, will post for cost of shipping by Canada Post
(reimbursed PayPal). First come, first served, etc.
I'm in search of either an XYlogics 472 in the Sun Multibus to VME adapter, or just a Multibus to VME adapter (can get the bare XYlogics boards). I'd prefer the Sun 501-1155 assembly since it has the right back panel connectors, but either way is better than neither way :)
I have an old german PLC on the desk that I need to repair,
it is an Eberle PLS511, build out of a 1Bit CPU build out of 4xxx CMOS
I do have two slightly different units, one is equipped with 3 pcs
66S018 Eproms from Intersilm DC is 8319.
I'm unable to find a datasheet for that device but I thin it is
compatible to the old Intersil IM6653 1024x4 Bit Eprom to build the
wordlength of 12 Bits out of 3 Roms..
There is a different memory Card equipped with 2 27C04, the jumpers are
configured for a 2K Rom type..and it seems that the 27C064 ar only
installed because of the CMOS Power consumption..
Can someone plase confirm that the 6653 is compatible to the 66S018
which may be a military variant?
Is there a datasheet perferably including the description of the
Thanks in Advance,
Technik Service u. Handel Tiffe, www.tsht.de, Holm Tiffe,
Goethestrasse 15, 09569 Oederan, USt-Id: DE253710583
info at tsht.de Fax +49 37292 709779 Tel +49 37292 709778 Mobil: 0172 8790 741
On Sun, 17 Oct 2021 14:52:33 -0400
Jesse Dougherty via cctalk <cctalk at classiccmp.org> wrote:
> I have A series servers, parts, interface cards, and probably any
> accessory that you might need. If anyone is looking for any HP 1000 A
> series hardware, let me know. I still have a few of these loaded A990
> boxes that I can do $1,700.00 each
As a satisfied customer, I can vouch for Jesse's offer. I bought one of these
systems over a year ago and it has performed flawlessly ever since. I've used
it with multiple SCSI disks and GPIB disks (including HPDrive).
Bickley Consulting West
"Black holes are where God is dividing by zero"
Does anyone have information on a SMC*11E controller? Appears to be a two-drive SMD controller for Unibus (hex height module). Looking the connectors over, it looks like it'd probably drop into a MUD slot and use the SPC pins.
I have A series servers, parts, interface cards, and probably any
accessory that you might need. If anyone is looking for any HP 1000 A
series hardware, let me know. I still have a few of these loaded A990
boxes that I can do $1,700.00 each
Cypress Technology Inc
Jesse at Cypress-tech.com
I have a copy of the disk this image was made from booted on my DW, and am
trying to load easywriter or a little basrun compatible basic program onto
an 8" disk with my greaseweazle.
Not having much luck with the HxC software or winimage poking at that
image, or loading what I would think would be compatible DOS disks on the
Does anyone have some pointers on tools to help me read this image, and
make new images and add files?
Someone in one of the Facebook vintage groups that I'm in just picked up a
Computhink Eagle 32, an early-ish (appears to be circa 1981/82) 68000-based
machine with integral display and keyboard.
On the rear it has a 50-pin connection for floppy and a 34-pin connection
for a hard disk, but they have no external peripherals for it, and also no
software and documentation. It's quite possible that the floppy connection
is simply Shugart; hard disk *maybe* SASI I suppose, skimping on the number
of ground lines (in which case it likely ran an external bridge to ST412/506).
Online searching shows up very little about this system; does anyone here
happen to have one or know anything about them? This one seems to have a
pair of 256KB memory boards fitted, but also (perhaps worryingly) an empty
"video" slot - although CRT connections apparently route to the main system
board, so there's a chance that there was just a video expansion option not
fitted to this particular machine. Still, even if that's not an issue,
without knowledge of drives and software it might forever remain in boat