2 Nov
2010
2 Nov
'10
5:27 p.m.
In particular, the MRA42P solder cup 42 pin
"winchester" plug for
Diablo 31 disk drives.
Manufacturer's webpage lists Powell and CDM as stocking distributors.
http://dilp.netcomponents.com/winchesterelectronics.html
Does the CHM or someone local to you have a RK03? Some mid-late-70's
early DEC and DG 3rd-party sellers (AED? DSD? General Robotics?) sold Diablo
drives with their own homegrown Unibus and Omnibus interfaces but that
stuff was kinda crufty when it brand new, never mind 30+ years later. Wasn't
the Diablo 30 the same as the RK03?
Tim.
2 Nov
2 Nov
6:48 p.m.
On 11/2/10 2:27 PM, Tim Shoppa wrote:
CDM gave me the $75 quote
In particular,
the MRA42P solder cup 42 pin "winchester" plug for
Diablo 31 disk drives.
Manufacturer's webpage lists Powell and CDM as stocking distributors.
Does the CHM or someone local to you have a RK03? Some
mid-late-70's
early DEC and DG 3rd-party sellers (AED? DSD? General Robotics?) sold Diablo
drives with their own homegrown Unibus and Omnibus interfaces but that
stuff was kinda crufty when it brand new, never mind 30+ years later. Wasn't
the Diablo 30 the same as the RK03?
The RK03 is a Diablo 31. AED sold the model 2200 Unibus controller, Xylogics
sold a QBus RK11 emulator (which I have, and works fine). Lots of minicomputer
companies OEMed Diablo drives. They are pretty reliable, but do use DTL ICs
in all but the last generation of them, which switched to TTL.
I need to make a cable for a Wilson Labs drive exerciser box. If I have to, I'll
canabalize one of my spare Alto drive cables for the Diablo connector assembly on the
end.
A bit of warning on the Wilson exercisers. There are two versions, one that has
a built-in supply, and one that steals power from the drive.
11 Nov
11 Nov
12:41 p.m.
On 11/2/10 3:48 PM, Al Kossow wrote:
On 11/2/10 2:27 PM, Tim Shoppa wrote:
>> In particular, the MRA42P solder cup 42 pin "winchester" plug for
>> Diablo 31 disk drives.
>
After a week of digging around, I did finally come up with the
connectors. I ended up getting MRAC connectors (separate pins and shells),
with the shell from one source and pins from another.
The pins are used in V.35 connectors, so they are easy to find.
42 pin MRAC shells were only made by Winchester,
but there was a local source ($100 minimum though)
12:53 p.m.
In article <4CDC2AB0.2040605 at bitsavers.org>,
Al Kossow <aek at bitsavers.org> writes:
but there was a local source ($100 minimum though)
Ouch.
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2:53 p.m.
I was wondering it a jigsaw session or delron machine could solve the
shell problem. I saw the V.35 connectors, and figured out the pins.
I wonder how they do the detents inside the shells to retain the pins if
one were machining it yourself with an NC plastic machine of some sort.
Jim
On 11/11/2010 9:41 AM, Al Kossow wrote:
On 11/2/10 3:48 PM, Al Kossow wrote:
On 11/2/10 2:27 PM, Tim Shoppa wrote:
>> In particular, the MRA42P solder cup 42 pin "winchester" plug for
>> Diablo 31 disk drives.
>
After a week of digging around, I did finally come up with the
connectors. I ended up getting MRAC connectors (separate pins and
shells),
with the shell from one source and pins from another.
The pins are used in V.35 connectors, so they are easy to find.
42 pin MRAC shells were only made by Winchester,
but there was a local source ($100 minimum though)
3:11 p.m.
On 11/11/10 9:53 AM, Richard wrote:
The shells will be used for another project.
I've started designing a board to do Diablo 31 disk simulation
and experimental to standard ethernet conversion for the Alto,
(along with a bunch of other useful things).
It will bolt onto the back of the first drive, and get power from
the +5v terminator power pin.
A high density 68 pin cable replaces the cable from the drive
interface board to the first drive, and also brings across the
tx,rx, and collision signals from the ethernet board.
The new board can either source or sink the command lines on the
drive bus, so it can also be used as a tester or drive reader/writer
so it will be possible to read and copy 2315 packs in any format. I
have a bunch of Burroughs B1700 packs in the CHM collection I've been
dying to try to recover.
This all started yesterday when I stumbled upon these on eBay
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=130453759896
which are 200MHz ARM 9 boards with a user-programmable Cyclone II FPGA
for $35 (I bought 10..)
Hopefully, they'll be the base for a couple of different 14" drive
recovery designs.
but there was
a local source ($100 minimum though)
Ouch.
4:32 p.m.
In article <4CDC4E0B.7070101 at bitsavers.org>,
Al Kossow <aek at bitsavers.org> writes:
This all started yesterday when I stumbled upon these
on eBay
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=130453759896
which are 200MHz ARM 9 boards with a user-programmable Cyclone II FPGA
for $35 (I bought 10..)
Neat!
Hopefully, they'll be the base for a couple of
different 14" drive
recovery designs.
Even cooler! :-)
--
"The Direct3D Graphics Pipeline" -- DirectX 9 draft available for download
<http://legalizeadulthood.wordpress.com/the-direct3d-graphics-pipeline/>
Legalize Adulthood! <http://legalizeadulthood.wordpress.com>
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