Hi Peter,
I'm not sure if you'll get this or not, but I used to work for NEC (until
6mos ago) for 19 years. I was part of the first US assembly team that
re-assembled APC III and APC IV computers. That was back in 1986. Because
of the tariffs imposed on Japan, we received computers that were
previously assembled and tested in Japan, then disassembled and sent to
the US for re-assembly.
"Nothing's better to fix than my 8086!"
Don Cosentino
SeaChange International
978-889-3418
Yes, why not :-)
Now you only need the PDP-11/xx CPU box.
The Libretto can double-function as terminal and as mass storage
(remember, Pete also makes a so-called XX driver available. When you copy
the XX.SYS to the PDP-11 system, you can have (non-standard) virtual "RX01"
floppies of 16 Mb ! That's half the max partition size in RT11.
In the XM monitor that would be the XXX driver :-)
- Henk.
________________________________
Van: cctalk-bounces at classiccmp.org namens Gordon JC Pearce
Verzonden: wo 18-01-2006 22:44
Aan: On-Topic and Off-Topic Posts
Onderwerp: Re: RX11 emulator fun ...
Gooijen, Henk wrote:
> here is the picture: http://www.pdp-11.nl/rx11emul.jpg <http://www.pdp-11.nl/rx11emul.jpg> (104 kb, resized to 819 x 614).
Heh. I use minicom on my Libretto as a terminal for my PDP-11.
Gordon.
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here is the picture: http://www.pdp-11.nl/rx11emul.jpg (104 kb, resized to 819 x 614).
- Henk.
________________________________
Van: cctalk-bounces at classiccmp.org namens Gooijen, Henk
Verzonden: wo 18-01-2006 22:16
Aan: cctalk at classiccmp.org
Onderwerp: RX11 emulator fun ...
Hi all, just a good feeling to share ...
I finished the prototype setup for the RX11 emulator of Pete McCollum.
I installed his design together with the M105 and M7821 in my 11/34.
I first booted RT11 (v5) from RL02. RXEMU is running on a PC that is connected
to Pete's board via the parallel port. (A note on that PC at the end...)
".SH DEV" shows "DX Installed 177170 264".
Then I did ".DIR DX0:" , and behold, I got the list output from DX0: !!
Then I entered ".BOOT /FOR DX0:" ...
OK, that takes some time, but then I got "RT-11SJ V04.00A". COOL !!
Pete's RX11 emulator works great. I also loaded the small bootstrap that
Pete included in the ZIP file into the memory of the just turned on 11/34.
When I start the loaded code, it boots right away from "nothing" from the
virtual RX01 floppy on the PC! What fun !!
A note on the PC that I use to run RXEMU ....
it is a Toshiba Libretto 100CT !!! The size of that "sub-notebook" is about
the same size as a VHS cassette. I was laughing to see the big PDP-11/34
boot from the tiny Libretto :-) I took a picture. If it's of resonable
quality I will post a link.
In one word: GREAT !!!
- Henk.
This message and attachment(s) are intended solely for the use of the addressee and may contain information that is privileged, confidential or otherwise exempt from disclosure under applicable law.
If you are not the intended recipient or agent thereof responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited.
If you have received this communication in error, please notify the sender immediately by telephone and with a "reply" message.
Thank you for your cooperation.
Hi all, just a good feeling to share ...
I finished the prototype setup for the RX11 emulator of Pete McCollum.
I installed his design together with the M105 and M7821 in my 11/34.
I first booted RT11 (v5) from RL02. RXEMU is running on a PC that is connected
to Pete's board via the parallel port. (A note on that PC at the end...)
".SH DEV" shows "DX Installed 177170 264".
Then I did ".DIR DX0:" , and behold, I got the list output from DX0: !!
Then I entered ".BOOT /FOR DX0:" ...
OK, that takes some time, but then I got "RT-11SJ V04.00A". COOL !!
Pete's RX11 emulator works great. I also loaded the small bootstrap that
Pete included in the ZIP file into the memory of the just turned on 11/34.
When I start the loaded code, it boots right away from "nothing" from the
virtual RX01 floppy on the PC! What fun !!
A note on the PC that I use to run RXEMU ....
it is a Toshiba Libretto 100CT !!! The size of that "sub-notebook" is about
the same size as a VHS cassette. I was laughing to see the big PDP-11/34
boot from the tiny Libretto :-) I took a picture. If it's of resonable
quality I will post a link.
In one word: GREAT !!!
- Henk.
This message and attachment(s) are intended solely for the use of the addressee and may contain information that is privileged, confidential or otherwise exempt from disclosure under applicable law.
If you are not the intended recipient or agent thereof responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited.
If you have received this communication in error, please notify the sender immediately by telephone and with a "reply" message.
Thank you for your cooperation.
Does anyone know how to change the video settings in the HP 382 computer?
(I think the main board is the same for the 9000/380). The 382 has a VGA
type video port but my monitor keeps reporting "Unsupported Mode".
Joe
On Fri, 13 Jan 2006 09:09:26 -0500, Brad Parker <brad at heeltoe.com>
wrote:
> Hi
>
> I've got an old HP 6286a bench supply. It's been sitting for a while
> and I turned it on and discovered it seems to have no voltage
> regulation
> - it gives out about 23VDC not matter what. The current regulation
> seems to work however.
>
Does the voltage drop down from 23VDC when you limit current?
Shorting the output and playing with the current control will
indicate that the current limit is working and that the output
transistors are okay. A better test is to place a low-valued resistor
across the output and limit current while measuring the voltage
across the resistor. This will tell you that the output stage is
working.
> Anyone ever look inside of one of these? It looks like a nice supply
> and I hate to toss it.
>
> -brad
The 6286a is a 20V, 10A supply with voltage and current controls.
Great for reforming caps and testing old hardware. I would make an
effort to resurrect the beast.
I have found in a number of supplies the front panel adjustable pots
open up or the wiper go south. This will make the output go to max.
Another problem is small electrolytic caps in the voltage control
circuit going bad. Often, blindly shotgunning all the small caps will
make things work for another 15 years (sorry Tony...).
The Boat Anchor Manual Archive <http://bama.sbc.edu/hp.htm> has a
copy of the 6285A which should be close to what you have.
Good luck.
CRC
Tony wrote:
> ... the latter means it's starting the brush cycle (where it
> sweeps the platter with the brushes driven by that little
> synchronous motor at the rear right of the pack, if you've
> not been sensible enough to remove the brushes).
:-) The brushes themselves are indeed removed from the arms,
but I left the motor/arms assembly to keep the original state.
> Exactly what it should be doing.
Thanks! Good to hear.
> Are you sure about that? You can't recover a bulk-erased pack
> because you can't rebuild the servo surface, but this drive
> has a separate servo surface so there's no good reason why
> you couldn't reformat the data surfaces.
> I've not tried it, though.
True, just like the RL01/RL02 there is a separate servo track
on the platters of the RK06/RK07. Indeed, I did try the .FORMAT
command, but RT11 reported that the command was not available
for the device, or something like that.
".INIT" gave me an error like the ".DIR" command.
You are correct that you can format the RK07! It does not write
the servo tracks ("impossible"), but it does write the data *and*
the headers. However, that format command is not in RT11, but it
is in XXDP.
Edward tried his RK07 last evening, and after he loaded a pack
(no controller connected at all), he saw the same events (LEDs
and head movement), but on his drive the READY lamp illuminated.
I have the field maintenance print set ...
> It's been several years since I fiddled with one of thsese
> (too many machines, too little time...) but something in the
> back of my mind says that one of the lamps comes on when the
> controller accesses the drive for the first time. It may just
> be the lamp in the 'A' button.
Correct. As Edward saw, the READY lamp must go ON when the heads
are on track 0. I have read in the RK611 controller manual (damn,
I can't find that one now!) that the "A" or "B" indicator is lit
when the controller attached to the channel does an access.
Time to test the drive without any cabling (to copy the exact
condition that Edward has), and check the cables to the controller.
Then try to run some of the RK611/RK07 XXDP programs!
Perhaps they can tell something before I grab the DVM and scope ...
thanks,
- Henk.
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Thank you for your cooperation.
At 09:29 AM 1/17/06 +0100, you wrote:
>Thanks for that remark, Pete!
>I did not want to go into "pedantic" mode, but I was indeed
>thinking about the capacitors in the EMI filter, but thought
>that chances are very slim that they fail.
That hasn't been my experience. I've had EMI filters fail in two HP
1000s, my BBC Acorn and a couple of other vintage computers. I also live in
the lightning capital of the world (central Florida) and lightning doesn't
care if it's turned off or not so I unplug everything when I've not using it.
Joe
Hi,
Anyone interested in an IBM 2520 card read/punch?
This one is not in great shape -- missing a couple
of SLT cards, buttons, and the card weight. But
it's nice and heavy -- probably 600-800#. This model
has a channel interface built in. Have not been able
to locate schematics/maintenance docs. Location is
Oakland, CA. Can be palletized if you want to have
it shipped. If interested let me know ASAP, else
I'll have to yank what parts I can and then send it
off to the glue factory.
Brian
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
_| _| _| Brian Knittel
_| _| _| Quarterbyte Systems, Inc.
_| _| _| Tel: 1-510-559-7930
_| _| _| Fax: 1-510-525-6889
_| _| _| Email: brian at quarterbyte.com
_| _| _| http://www.quarterbyte.com
