Hi Bob
I'd gotten the hard drive for the Nicolet but not had time to
fiddle with it. I'm currently redoing my code for the floppy drive
on my Nicolet.
I have a couple disk platters that should be able to be used
for the hard drive ( and one that had a head crash ). I'd
cleaned up the heads on the drive and with the new disk, seems
OK.
I've not fiddle with it since though.
I was wondering if you'd like to fiddle with it on your Nicolet.
You could barrow it for some time and install the demon code
on it.
On a separate issue, when I'd gotten my Nicolet, I had 2 failed
ICs. One was a 7474 and the other was a DTL with expanded
input ( I swapped a location that didn't need the expander
input and use a TTL there for that part ).
I just got started again and found the address wouldn't increment.
After some frantic trouble shooting ( knowing it was Saturday and
most places would be closed tomorrow for parts ), I finally traced
it to a bad 7404. It is not easy without an extender card.
I'd attach a couple wires to locations I wanted to see and stick the
card back in. I must have pulled an inserted two of the cards
30 times. I hope is wiped the connector pins good and clean.
If you should decide to make an extender, I'd split the cost of the
boards with you. I think it would be easy to make three separate
extenders and put a rail across them to hold them together.
It wouldn't be too bad to just have the three separate ones and
be careful connecting things.
I believe they are just three 100 pin connectors, like S100 boards
use.
Dwight
I already checked the manuals on bitsavers, user, diagnostic and service
manuals are there, together with scsi interface specifications... but no
schematics.
thanks for the help with measurements!
could you confirm that the drive gives no interface error if powered
without scsi connection to a host?
thanks
Andrea
The 42U racks I have are too big for my house, so im looking for a
couple of 24U enclosed racks.
Im located In Farwell Michigan
Let me know what you have
Thanks
Steve
Hello,
I'm repairing an M4data 9914 tape drive.
After fixing some problem with psu, replacing the roller rubber with a cut
of tubing, cleaning mechanical parts, oiling some pulleys, now it starts up
on power on, runs diagnostics, but unfortunately ends with a **BIFF error
(scsi interface).
The drive hasn't been connected to a pc via scsi yet.
I have a couple of questions:
- what should be the correct external diameter of the rubber roller?
- where could I find schematics?
thanks
Andrea
> From: Johnny Billquist
>> I compared the DEC part numbers on the RA81 slides and some RL02 slides
>> I have, and ... they are indeed the same part number!
> What? That can't be. They are physically different.
All I know are the following facts:
- I bought a group of surplus RL02 drives from a scrap dealer, and they came
with slides with the following part #'s: 1213686-00 Rev-K1-R and 1213686-00
Rev-K1-L. (BTW, I have extra -L's, if anyone needs them; will trade for
something useful.)
- I bought a machine which had previously belonged to DEC in Vancouver, and
it came with a couple of RA81 drives, and they had slides with the following
(identical to the above) part #'s: 1213686-00 Rev-K1-R and 1213686-00
Rev-K1-L.
The two slide sets above are completely identical in appearance; the only
difference is that the part # is in different places on the two.
- I was given an RL02 drive a while back, and it came with slides, but they
don't have any part #'s that I can see.
They look almost identical to the ones above, except that the newer ones have
two rocking trip levers (one in the middle, and one at one end), and the
older ones have only one (the one in the middle).
Noel
On Mon, Mar 2, 2015 at 1:50 PM, John Foust <jfoust at threedee.com> wrote:
>
> Cue the "Such as I am, such shalt thou be" refrain, and a reminder
> that if we pass before arranging the post-mortem disposition of
> our collections, it could all land in the dumpster, or maybe at
> an estate sale if we're lucky.
>
> - John
>
>
Shameless plug - we cover exactly this topic in the latest Retro Computing
Roundtable episode #95, which should be on the air pretty soon at
http://rcrpodcast.com.
- Earl