Dwight,
I would be very interested in your NC4016 experience. I did collect a
NC4016 STD bus board a while ago from ePay, and have successfully spoken to
it via a terminal - It would be fun to add storage, but I have no idea
where to start :-)
And no doco..:-/
Kindest regards,
Doug
Hello Paul,
Am 27.10.2020 um 17:33 schrieb Paul Koning via cctalk :
> The motor start surge current is a lot higher than the steady state current
I fondly remember my Seagate Elite 9GB (5.25“ double height), nominal 5400 RPM.
Power applied, it slowly spins until a certain speed and then
> On Oct 27, 2020, at 11:08 AM, Dave Wade G4UGM via cctalk
> wrote:
>
> ...
> I remember when doing standby power generator tests we had to remember to
> off-line all the drives at end of job, other wise they all tried to rewind at
> the same time
> .. and the generator could
I have one of the NC4016 boards ( I forget which one ). I added a XT floppy
controller and a XT MFM disk controller. I made some other hardware for doing
byte stuff faster. Using address -1, I could access it faster as a short
literal. I had a 8 bit barrel shifter there. It came in handy for
> -Original Message-
> From: cctalk On Behalf Of Jon Elson via
> cctalk
> Sent: 27 October 2020 14:51
> To: nico de jong ; gene...@ezwind.net;
> discuss...@ezwind.net:On-Topic and Off-Topic Posts
>
> Subject: Re: Strange magtape anecdote
>
> On 10/27/2020 12:50 AM, nico de jong via
On 10/27/2020 12:50 AM, nico de jong via cctalk wrote:
Hi all,
Back in the early 70's I was an operator on an IBM 360/40
with 4 tapedrives. Nobody could understand that sometimes
a tape transfer would stop saying "end of tape", mainly
around 3 PM,
It was also well-known that you should not
On 10/26/2020 11:24 PM, Guy Sotomayor via cctalk wrote:
It took us a while to figure several things out:
1) all of the machines were run with their covers off
I asked one of the mechanical / packaging guys at Microdata one time
what the hardest part
of making the cabinets and mechanical
On 10/26/2020 10:50 PM, nico de jong via cctalk wrote:
IBM 360/40 with 4 tapedrives.
the 3420 drives and I suspect their predecessors which were more common
on the 360s used
one light bulb to run the light from one bulb all over the drive.
The 3420's we had had a big box of spaghetti
We had a similar problem when I was at IBM and we were developing a
follow on to the PC/AT (it never shipped). We had a bunch of
prototypes in the lab running tests with stepper HDDs (rather than
voice coils) We kept having disk errors (failure to find track 0) when
running tests.
It took us a
