> From: Jon Elson
> Power the system off for 10 minutes, then power on and read various
> locations. If data bit 4 shows 1's and 0's, then the reading is OK, and
> it is the writing path that is stuck.
I'm not sure this will work, as the anomalous voltage I see (2V) is after the
output (i.e. to the QBUS) data latches, but before the bus transceiver: i.e.
in the output (reading) path. So I know it's the output data path that has a
problem, not the input.
The only question is which of three chips on the output data path might be
the cause of the problem; one of the two three-state latches (one for memory
data, one for CSR data), or the bus transceiver. As far as I can tell, those
are the only three devices attached to that conductor (where I see the
constant 2V).
Noel
Hi, all, I'm trying to fix a broken MSV11-L card (M8059-KF). The symptom is
that it always reads back with the 020 bit set, but otherwise appears to be
fine. (E.g. you can write a number in 0, and a different number in 020, and
each reads back OK, with the exception that the 020 bit in each is always
set; i.e. the addressing is working fine, as is the QBUS generally.)
So poking around with my 'scope, I find that the latched D04 signal ("LAT D04
H") is always around 2V - not good! From the prints:
http://www.mainecoon.com/classiccmp/MSV11-L/MSV11-L%20FMPS%20MP01238%20(M80…
it appears to be generated on page 6 of the prints (page 10 of that file), as
the wired-or output of two octal 3-state-output latches (E57 and E64, an
'LS373 and an 'S373 respectively). The only place it appears to go is to the
quad bus transceiver (E62, an 8641), on page 2.
My question is: any guesses as to which of the three is causing this? Or do I
just have to start replacing them until I find the guilty party? :-) If so,
what's the best order to do so in? FWIW, the two octal latches are both TI
Malaysia parts (date code 8231), and the transceiver is a Motorola (date code
8249).
Thanks in advance for any help!
Noel
Hi All,
I have a couple of Shugart 810 drives I'd like to get working with an OSI system.? While swapping the drives around, I made some changes to the jumpers, but now I can't find the notes I made of the original configuration.? Does anyone have information on the function of the various jumpers on these drives?? I found some manuals online, but they don't seem to have the jumper info.
Any information would be most welcome!
Thanks,
Dave
I'm not sure I ever posted this publicly, never went out of my way to do so
in any case.
The HP Interex and HP 1000 Contributed Library website (I think it was
interex.org) went down quite a few years ago, and I managed to scarf a
complete copy of the site after the pending turnoff was announced but before
it went dark.
This content is all at http://www.classiccmp.org/interex
There are two folders: One is the proceedings, slideshows, etc. of all the
HP Interex meetings and the other is the entire HP CSL for HP1000.
As usual, please do not rape the content. If you need more than a few files
here and there please contact me off-list to arrange a hard drive swap, etc.
Best,
J
Not vintage stuff, but I thought I would offer them to the list first. I
have three of these caddies, marked 146.8 GB 10K Ultra320 SCSI. You can see
one here:
http://www.ebay.co.uk/itm/HP-404708-001-146GB-10K-3-5-SCSI-Ultra-320-Hard-Di
sk-Drive-in-ProLiant-Caddy-/251350220378 but bear in mind there is no disk,
just the caddy.
Located in the UK.
Regards
Rob
Hey folks,
I really need some cash and some space, so it's time for my Intel Intellec
MDS gear to find a new home. I inherited this kit some years ago, and know
almost nothing about it - in fact, I'm even confused as to the correct
model number; 'experts disagree', it's either an MDS-225 or MDS-800.
It's a large white cube, about 20" on a side, with a CRT, one 8" floppy and
a number of plug-in boards. There is also a blue Intel dual 8" drive, one
seriously heavy-duty keyboard, a few cables and a bevy of 8" floppy discs.
I also have an ICE pod for it, somewhere..
It has never been powered-up once since I've had it, though it was
apparently 'working fine' when retired sometime in the early-mid 1990s.
Cosmetics are very good, it's no ugly duckling by any stretch.
Photos will appear as I'm able to move it to a location with sufficient
light.
I did find this entry in the CSL1000 library to be of interest!
BAS200 - HP 2000F BASIC FOR DOS-M/DOS III
2001 X172Keywords: 99.5- 10 BASIC
So Hp2000/F was ported to DOS-M/DOS III? Wowsers.
J
> From: Sean Caron
> I was browsing eBay and came across this very unusual looking Unibus
> card
Yeah, I was wondering about that too. It looks like it has a ton of memory
over on that one side; I was thinking that perhaps it was an EUB memory card
with ECC, or something? Anyway, I decided not to mess with it (even if it is
pretty cheap - got enough fish to fry on my hands at the moment... :-).
Noel
About a year ago I posted about this; I have an HP 9830A upgraded with
an Infotek MX-30 processor upgrade (there's a nice writeup on this page:
http://www.hp9825.com/html/infotek.html), but I'm missing the RAM
boards. Thought I'd poll again just in case anyone has some, as
unlikely as that may be.
Alternately, if anyone needs an MX-30 board set (sans memory) for a
restoration, drop me a line and maybe we can work something out. Hate
to sit on this forever and never get anything working...
- Josh
Fellow Classic Computer Enthusiasts,
My 9406-270 has arrived. It was strapped to a small pallet with more bubble
wrap around it than I think I've ever seen before. Somehow the pallet just
fit in the back of my mini-van so the freight company was able to load it in
there with a fork lift.
I got it home and into my living room. It came without drives so I'm having
to start from scratch. I have two drives in slots one and two, and think I
have the twinax console connected correctly. It appears to IPL from CDROM
but I'm not getting anything on the console other than the cursor moving
>from the upper right corner of the screen to the upper left corner of the
screen after about twenty minutes of occasional CDROM activity. Does anyone
have any pointers for a newbie at installing OS/400, or whatever V5R4 is
called. I wish IBM would stop changing perfectly good OS and hardware
names.
--
Kevin
http://www.RawFedDogs.nethttp://www.Lassie.xyzhttp://www.WacoAgilityGroup.org
Bruceville, TX
What's the definition of a legacy system? One that works!
Errare humanum est, ignoscere caninum.
