In case you had not seen it already. I finally managed to control my big HP 7970E 9-track tape and my HP 2631G dot matrix from the little HP 85 that could. Hey, they all talk the same HP-IB after all (well, not really but close enough). Here is the resulting demo of this odd 1970's trio:
https://youtu.be/YS9dGYUbNd0
Marc
> From: Jacob Ritorto
> Can I tear apart my little BA23 .. and put the Micro/PDP-11 backplane
> .. into the spot that my 11/03 backplane currently occupies and run it
> via the (working) stock 11/03 power supply?
> ...
> Specifically, would I have to butcher power and clock lines to do this,
> or is it all plug compatible?
I'm not absolutely sure exactly what you have that's holding the '11/03
backplane'; if it's a standard BA11-M enclosure, the answer, sadly, is 'no'.
The BA-23 uses the H9278-A backplane and H7864 power supply; the BA11-M uses
the H9270-A and H780 backplane. The power connections between the first two
are completely different from the latter pair; the first uses a long,
single-width Molex-type connector, the latter uses bare wire ends to a
terminal block on the backplane.
Also, the H9270-A is a four-slot backplane, and the H9278-A (an eight-slot)
almost certainly will not physically fit into the space for the former.
If your '11/03 backplane' is a different kind of backplane, in some other kind
of box (e.g. BA11-N or BA11-S), the answer, sadly, is still 'no', because they
both also use terminal blocks for power. (Although if you have a BA11-S, you'd
already be set, those are Q22 native.)
Really, it's not that hard to upgrade an H9270-A (or the H9273-A in a BA11-N)
to Q22 (I have done several of the latter); the transplant you speak of (were
it possible) is on the same order of magnitude of work.
Noel
PS: In dragging my BA23 out to look at it, it dawned on me that I will
probably never, ever use it - I now have several BA11-N/S boxes, and prefer
them. (I don't need to run the later disks that need the BA23.) So if someone
is interested in the either the BA23, or the spare H7864 I have for it, please
let me know. I'll let either go for my original cost plus shipping.
All ?
I picked-up a Heath H-11 machine the other day and it has a single 4kw memory board. From my prior experiences with DEC (an 11/34a many years ago; now at the RI Computer Museum), I know my way around the field guide?but I?m having trouble trying to identify the correct module number suitable for the LSI-11 CPU. Even though it?s a Heath machine, I assume it?s module compatible with DEC. Any help would be appreciated. Thanks!
Rich
--
Rich Cini
Collector of Classic Computers
Build Master and lead engineer, Altair32 Emulator
http://www.classiccmp.org/cinihttp://www.classiccmp.org/altair32
I have an 11/73 card in one of my video editing systems...
does this mean I can give my H-11 more balls?
In a message dated 2/9/2016 11:36:30 A.M. US Mountain Standard Time,
jacob.ritorto at gmail.com writes:
On Tue, Feb 9, 2016 at 11:27 AM, Noel Chiappa <jnc at mercury.lcs.mit.edu>
wrote:
>
>
> I'm not absolutely sure exactly what you have that's holding the '11/03
> backplane'; if it's a standard BA11-M enclosure, the answer, sadly, is
> 'no'.
> [...]
> If your '11/03 backplane' is a different kind of backplane, in some other
> kind
> of box (e.g. BA11-N or BA11-S), the answer, sadly, is still 'no', because
> they
> both also use terminal blocks for power. (Although if you have a BA11-S,
> you'd
> already be set, those are Q22 native.)
>
>
OK, now that I know what I'm looking for, my target options here are:
Chassis:
BA11-N and "OBA11-R" (an expansion box)
Backplanes currently in these chassis are:
H9273 and H9273-A
Power supplies are all H786.
> Really, it's not that hard to upgrade an H9270-A (or the H9273-A in a
> BA11-N)
> to Q22 (I have done several of the latter); the transplant you speak of
> (were
> it possible) is on the same order of magnitude of work.
>
> Noel
>
So, since grafting in the Micro backplane would involve butcher work, I'm
now wholeheartedly convinced that I should be moving to your setup with the
BA11-N/S boxes, Noel. And I'm sold on the Q-22 backplane conversion
(despite failing the first time I tried it years ago). Going to study what
prints I have, review previous advice and go for it.
Thank you for all the tips and hand-holding!
--jake
On Mon, 08 Feb 2016 at 18:46:13 +0000, Adrian Graham wrote:
> Having had another bit of CBM kit with a failed CPU I'm wondering where you
> lovely US folk get your spares from since ebay seems a bit ridiculous for
> replacements at ukp8 a pop being the lowest price. They're surely not THAT
> valuable?
The first place I always check for things like that is Anchor Electronics
(anchor-electronics.com). I see that they don't list the 6502, but they
do have the 6502B for $4.95. I have no idea whether they ship outside the
US or not. The second place I check is Jameco, and someone else already
posted that they have them.
allan
--
Allan N. Hessenflow allanh at kallisti.com
> From: Henk Gooijen
> you need some some components to generate the AC LO and DC LO signals.
> The 11/04 needs them.
You could also do what I did on an off-brand LSI-11 chassis I had, whose
power supply was working (producing good +5V/+12V), but whose power control
board (to generate AC/DC OK signals) wasn't working - and I didn't have a
circuit diagram for it.
So I was lazy, and cheated: I disconnected the control board connection to
the backplane, and the pull-up termination resistors brought the AC/DC lines
up to their 'OK' state! :-)
I don't _recommend_ this, but it does work! If you do this, probably best to
power on the machine with the HALT switch asserted, so it doesn't try to run
while the power is still coming on! :-)
Noel
Yesterday I picked up the PDP11/04 that Jay mentioned a few days ago.
Less than 15 miles from home !
The machine spend its early days as a processor in chemical analysis apparatus, and was subsequently bought by the employee using it.
Before he could make use of it better, more powerful, easier to use machines came along and the -11 spend the next 30 years in a garage.
The -04 is an entry level machine, and the cards inside match this :
M7263 KD11 CPU
2 x M7264 16K DRAM cards
M7856 DL11 SLU/RTC
M7846 RX01 controller
2 x M7814 DZ11-F
and of course the M9301, M9302 and M9202.
Alas it has just the simple 2-switch frontpanel.
The machine also had the battery backup option, and the lead/acid batteries will celebrate their 40th birthday next year !
Better not try to charge them....
Overall the machine is in very good condition, both CPU and RX01, and it is packed in a very nice half-height rack with the red PDP11 bezel at the top.
Pictures next week when the machine is cleaned and reassembled, restoration is to start next winter, after a house move which will nearly double working area for the hobby.
Many thanks to Roland for preserving the machine, and to Jay for acting as an interface !
Jos
Exciting stuff for a Friday night, right? Here's a visual aid in case
you're needing further inspiration:
https://www.instagram.com/p/_K-zHhHvLn78Qu5ijWqMf-HBem1LKMLaEdI1c0/ The
M2333K is the smaller one on the left with the green and yellow lights on.
I'm booting from rl0, which contains the tuhs 2.9.1 rl02 image I wrote with
vtserver earlier.
I want to use my nice, roomy smd disk so I can pull in all the sources and
recompile stuff and I've managed to get this *so* close to working but I'm
getting
xp0a: hard error bn xxxx cs2=1100 <MXF, IR> er1=0
on every single block when I try to mkfs /dev/xp0a 4800
This disk was working fine years ago via MSCP attached to the 11/73 (before
I lost the Micro/11 power supply).
Anyway, I referred to
http://bitsavers.trailing-edge.com/pdf/emulex/SC2151001-CC_SC21tech_Jan87.p…
to set the emulation on the Emulex card for two rm03s and they're showing
up in xxdp's zrmlb1 formatter, though they won't format there, screensful
of errors.
I think I set the m2333k to 32 sectors, per this manual:
http://manx.classiccmp.org/collections/antonio/chrisq/B03P-4760-0101A_-_M23…
Because XXDP is reputed to be really strict, I figured that was normal and
then tried the Emulex on-board formatting procedure against both xp0 and
xp4 and they formatted perfectly without error. Guess the Emulex on-board
stuff doesn't bother verifying much?
So I think that maybe I've misunderstood the hard sectoring / sector sizing
thing. Does anyone remember the gist of it and would you be able to
describe? Do you see any other mistakes?
thx
jake
2nd go, apologies if another version of this arrives but I sent it from a
non-list address so it might not get through with the emergency moderation
going on.
Hi folks,
Having had another bit of CBM kit with a failed CPU I'm wondering where you
lovely US folk get your spares from since ebay seems a bit ridiculous for
replacements at ukp8 a pop being the lowest price. They're surely not THAT
valuable?
I know Mouser have got the 're-released' WDC 65C02 which I may end up going
for since for 10 they're as low as ukp4.37, but don't us collectors have
bundles of spares?
Funny when I think of the number of BBC Micros that have been tossed over
the years....
--
Adrian/Witchy
Binary Dinosaurs creator/curator
Www.binarydinosaurs.co.uk - the UK's biggest private home computer
collection?
