21 Jul
2005
21 Jul
'05
1:33 a.m.
Hi there,
I need to find out about the ST506 cables for an Emulex DM01 QBUS
card. I've just got one with no cables. I understand that it's similar
to other Emulex MSCP cards (makes sense really) but it has a 50-pin
cable to connect the drives up. Anyone know how to make up a cable for
this? Or even, got a spare cable?
Gordon.
21 Jul
21 Jul
1:04 p.m.
Gordon JC Pearce wrote:
Hi there,
I need to find out about the ST506 cables for an Emulex DM01 QBUS
card. I've just got one with no cables. I understand that it's
similar to other Emulex MSCP cards (makes sense really) but it has a
50-pin cable to connect the drives up. Anyone know how to make up a
cable for this? Or even, got a spare cable?
Jerome Fine replies:
Making up the cable is actually rather easy in this case.
But my cable is buried somewhere at the moment. Basically,
34 lines are used for the 34 pin edge connector (daisy
chained if there are 2 drives) and the remaining 16 lines
are split into 2 groups of 8 lines, one for each of the
two 20 pin edge connectors, i.e. one for each drive. The
DM01 supports two MFM drives. If no one replies in a day
or two, I will try and locate my cable and specify exactly
how the connectors are set up.
Sincerely yours,
Jerome Fine
--
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'at' with the four digits of the current year.
1 Aug
1 Aug
3:02 p.m.
Jerome H. Fine wrote:
Did you ever turn this cable up? And does anyone know if the DM01
controller will be compatible with the breakout board and 50-pin plug in
a BA23 enclosure?
Gordon.
Gordon JC
Pearce wrote:
Hi there,
I need to find out about the ST506 cables for an Emulex DM01 QBUS
card. I've just got one with no cables. I understand that it's
similar to other Emulex MSCP cards (makes sense really) but it has a
50-pin cable to connect the drives up. Anyone know how to make up a
cable for this? Or even, got a spare cable?
Jerome Fine replies:
Making up the cable is actually rather easy in this case.
But my cable is buried somewhere at the moment. Basically,
34 lines are used for the 34 pin edge connector (daisy
chained if there are 2 drives) and the remaining 16 lines
are split into 2 groups of 8 lines, one for each of the
two 20 pin edge connectors, i.e. one for each drive. The
DM01 supports two MFM drives. If no one replies in a day
or two, I will try and locate my cable and specify exactly
how the connectors are set up.
Sincerely yours,
Jerome Fine
7:17 p.m.
Gordon JC Pearce wrote:
> >Jerome H. Fine wrote:
>
>> Gordon JC Pearce wrote:
>>
>>> Hi there,
>>> I need to find out about the ST506 cables for an Emulex DM01 QBUS
>>> card. I've just got one with no cables. I understand that it's
>>> similar to other Emulex MSCP cards (makes sense really) but it has a
>>> 50-pin cable to connect the drives up. Anyone know how to make up a
>>> cable for this? Or even, got a spare cable?
>>
>> Jerome Fine replies:
>>
>> Making up the cable is actually rather easy in this case.
>> But my cable is buried somewhere at the moment. Basically,
>> 34 lines are used for the 34 pin edge connector (daisy
>> chained if there are 2 drives) and the remaining 16 lines
>> are split into 2 groups of 8 lines, one for each of the
>> two 20 pin edge connectors, i.e. one for each drive. The
>> DM01 supports two MFM drives. If no one replies in a day
>> or two, I will try and locate my cable and specify exactly
>> how the connectors are set up.
>>
>> Sincerely yours,
>>
>> Jerome Fine
>
>
> Did you ever turn this cable up? And does anyone know if the DM01
> controller will be compatible with the breakout board and 50-pin plug
> in a BA23 enclosure?
Jerome Fine replies:
I still have not had time to look. I was mostly
waiting for someone else to reply. If by the middle
of next week, no one else has provided a reference
(perhaps bitsavers has the manual), then I will try
and find the cable.
The breakout board for BOTH a BA23 and the BA123 are
NOT compatible with the cable for the DM01!!!!!!!!!!
If you read the description of the cable needed for
the DM01, you immediately realize it is totally
different than what the RQDX3 uses.
Sincerely yours,
Jerome Fine
--
If you attempted to send a reply and the original e-mail
address has been discontinued due a high volume of junk
e-mail, then the semi-permanent e-mail address can be
obtained by replacing the four characters preceding the
'at' with the four digits of the current year.
9:23 p.m.
New subject: Disk drive parts
15 years ago or so I parted out a IV/Phase IV/60 minicomputer. I had to
reduce space, so I kept all the interesting stuff and threw out the sheet
metal, plastic, foam, etc. & kept the motors, boards, sensors, etc. Four
Phase mostly OEMed peripherals, as did most mini manufacturers. As a result
of this I have parts for about 6 of these (I think), Diablo model 30 high
density (512B sect) drives, which on DEC I think would be an RK03. It was a
2.5 MB removable cartridge disk with a stepping motor for the head
positioning. I can take pictures if this is not sufficient. These were used
by almost every mini manufacturer.
I also parted out at least two CDC 9762's. They are an 80 MB (unformatted) 6
platter removable cartridge drive. I have the motors, fans, heads, etc.
These too were used by many vendors.
Anybody needing such stuff please let me know. I would be happy to swap for
whatever interesting surplus you might have.
TIA,
Gil
4 Aug
4 Aug
10:32 a.m.
New subject: Disk drive parts
Gil,
I have a Diablo 30 and I need cables for it. I've been told that it can
be used with the PDP-8 but I need to find out which interface it requires.
Joe
At 11:23 PM 8/1/05 -0500, you wrote:
15 years ago or so I parted out a IV/Phase IV/60
minicomputer. I had to
reduce space, so I kept all the interesting stuff and threw out the sheet
metal, plastic, foam, etc. & kept the motors, boards, sensors, etc. Four
Phase mostly OEMed peripherals, as did most mini manufacturers. As a result
of this I have parts for about 6 of these (I think), Diablo model 30 high
density (512B sect) drives, which on DEC I think would be an RK03. It was a
2.5 MB removable cartridge disk with a stepping motor for the head
positioning. I can take pictures if this is not sufficient. These were used
by almost every mini manufacturer.
I also parted out at least two CDC 9762's. They are an 80 MB (unformatted) 6
platter removable cartridge drive. I have the motors, fans, heads, etc.
These too were used by many vendors.
Anybody needing such stuff please let me know. I would be happy to swap for
whatever interesting surplus you might have.
TIA,
Gil
2:55 p.m.
New subject: Disk drive parts
On Thu, 04 Aug 2005 17:32:39, Joe R. <rigdonj at cfl.rr.com> wrote:
Gil,
I have a Diablo 30 and I need cables for it. I've been told that it can
be used with the PDP-8 but I need to find out which interface it requires.
With the right cable adapters, the Diablo 30 should work with an RK8E.
ISTR the Diablo has a fat-pin square grid-type connector, like an old
fashioned V.35 serial connector, right? The RK05 uses a DEC backplane
block internally, with genuine Unibus cables (RK11D) or a DEC-style
paddle connector and 40-pin ribbon cables (RKV11D, RK8E).
_Electrically_ the Diablo 30 should be the same as a real RK05, but
mechanically, the cables are entirely different.
The drive chain also needs to be terminated. In the case of an RK05,
it's an M930 Unibus terminator in the last drive. Not sure about a
Diablo 30, unless you hang a real M930 off of one of those cable
adapters I mentioned. Of course, if you can find the right connector
for your Diablo 30, you could make a custom terminator - it's just a
bunch of resistors, and I'm sure the schematic is in multiple Unibus
printsets on bitsavers (but I can't really say where to start, except
look at any and all Unibus CPU prints).
-ethan
12:03 p.m.
New subject: Disk drive parts
At 04:55 PM 8/4/05 -0500, you wrote:
On Thu, 04 Aug 2005 17:32:39, Joe R. <rigdonj at
cfl.rr.com> wrote:
That's what I was told.
Gil,
I have a Diablo 30 and I need cables for it. I've been told that it can
be used with the PDP-8 but I need to find out which interface it requires.
With the right cable adapters, the Diablo 30 should work with an RK8E. ISTR the Diablo has a fat-pin square grid-type
connector, like an old
fashioned V.35 serial connector, right?
Yeap, that's them. I've heard them called Winchester connectors. I've
been watching for a connector to fit the drive but haven't found one yet. I
did find one that is one row longer so I could probable use it except that
one screw won't line up. There are three connectors on the D30. One is for
power, one is for computer interface and the other is to connect to
additional drives or a terminator. BTW the manuals for the Diablo 30 are
on Al's site.
The RK05 uses a DEC backplane
block internally, with genuine Unibus cables (RK11D) or
a DEC-style
paddle connector and 40-pin ribbon cables (RKV11D, RK8E).
_Electrically_ the Diablo 30 should be the same as a real RK05, but
mechanically, the cables are entirely different.
Yeah that was an unplesant surprise!
BTW I found out that the d30 uses an external power supply. Does anyone
have the specs or pinout for it or even an extra PSU?
Joe
The drive chain also needs to be terminated. In the case of an RK05,
it's an M930 Unibus terminator in the last drive. Not sure about a
Diablo 30, unless you hang a real M930 off of one of those cable
adapters I mentioned. Of course, if you can find the right connector
for your Diablo 30, you could make a custom terminator - it's just a
bunch of resistors, and I'm sure the schematic is in multiple Unibus
printsets on bitsavers (but I can't really say where to start, except
look at any and all Unibus CPU prints).
-ethan
4:27 p.m.
New subject: Disk drive parts
The RK05 uses a DEC backplane
Althoguh if you get a real Diablo cable, it has the connector mounted on
a little PCB, with a trasnistion connector and then a length of ribbon
cable on that. If you take off one end, the wires are in almost the right
ordser to solder to a DEC 'unibus' cable board to link to the RK11-C or
whatever. I wonder why :-)
block internally, with genuine Unibus cables
(RK11D) or a DEC-style
paddle connector and 40-pin ribbon cables (RKV11D, RK8E).
_Electrically_ the Diablo 30 should be the same as a real RK05, but
mechanically, the cables are entirely different.
Yeah that was an unplesant surprise!
BTW I found out that the d30 uses an external power supply. Does anyone
have the specs or pinout for it or even an extra PSU?
I thought the manuals were on bitsavers. The PSU pinout should be in
there. There were 2 PSUs from Diablo, one using a transsitorised
regulator, the other using a ferroresonant trasnformer. DEC also made
their own PSU (H734 or something) for these drives.
Joe
>
>The drive chain also needs to be terminated. In the case of an RK05,
>it's an M930 Unibus terminator in the last drive. Not sure about a
>Diablo 30, unless you hang a real M930 off of one of those cable
The Diablo terminator is a PCB stuffed with resistors soldered to the
connector. There's a +5V pin on the connector to power the terminator, of
course. I have _one_ of them, I also have 2 drives and the
interconnecting cables, so it's not up for grabs.
-tony
2:39 p.m.
New subject: Disk drive parts
At 12:27 AM 8/5/05 +0100, you wrote:
Yes, the manuals are on Bit-savers but IIRC they don't recall them
giving any details about the PSU.
There were 2 PSUs from Diablo, one using a transsitorised
Do you have schematics for any of those?
Joe
The RK05 uses
a DEC backplane
Althoguh if you get a real Diablo cable, it has the connector mounted on
a little PCB, with a trasnistion connector and then a length of ribbon
cable on that. If you take off one end, the wires are in almost the right
ordser to solder to a DEC 'unibus' cable board to link to the RK11-C or
whatever. I wonder why :-)
block internally, with genuine Unibus cables
(RK11D) or a DEC-style
paddle connector and 40-pin ribbon cables (RKV11D, RK8E).
_Electrically_ the Diablo 30 should be the same as a real RK05, but
mechanically, the cables are entirely different.
Yeah that was an unplesant surprise!
BTW I found out that the d30 uses an external power supply. Does anyone
have the specs or pinout for it or even an extra PSU?
I thought the manuals were on bitsavers. The PSU pinout should be in
there. regulator, the other using a ferroresonant trasnformer.
DEC also made
their own PSU (H734 or something) for these drives.
Can you check and make sure that that's the correct PN? If it is, I'll
go hunt for one. There are piles of DEC PSUs in Melbourne.
>
>The drive chain also needs to be terminated. In the case of an RK05,
>it's an M930 Unibus terminator in the last drive. Not sure about a
>Diablo 30, unless you hang a real M930 off of one of those cable
The Diablo terminator is a PCB stuffed with resistors soldered to the
connector. There's a +5V pin on the connector to power the terminator, of
course. I have _one_ of them, I also have 2 drives and the
interconnecting cables, so it's not up for grabs.
-tony
5 Aug
5 Aug
2:47 p.m.
New subject: Disk drive parts
I thought the
manuals were on bitsavers. The PSU pinout should be in
there.
Yes, the manuals are on Bit-savers but IIRC they don't recall them
giving any details about the PSU. The Diablo
terminator is a PCB stuffed with resistors soldered to the
connector. There's a +5V pin on the connector to power the terminator, of
course. I have _one_ of them, I also have 2 drives and the
interconnecting cables, so it's not up for grabs.
Do you have schematics for any of those?
4 Aug
4 Aug
8:30 p.m.
New subject: Disk drive parts
That little terminator card sounds right. IIRC the drives daisy chain
together. The cable from the Four-Phase end would be proprietary. They
tended to use an edge connector for I/O - often 44 pins. The daisy chain
cables are those V.35 looking connectors - what we used to call a
Winchester. I probably have some of those. I guess they were pretty standard
in the disk world. I may have the PS. Can't imagine why I would have pitched
that. Can't recall if it was a Diablo unit as well, but it seems like it
was.
Gil
A. G. (Gil) Carrick, Director
The Museum at CSE
University of Texas at Arlington
Department of Computer Science & Engineering
Box 19015, 471 S Cooper Street
Arlington, TX 76019
817-272-3620
http://www.cse.uta.edu/TheMuseum at CSE/
-----Original Message-----
From: cctech-bounces at classiccmp.org
[mailto:cctech-bounces at classiccmp.org] On Behalf Of Tony Duell
Sent: Thursday, August 04, 2005 6:27 PM
To: cctalk at classiccmp.org
Subject: Re: Disk drive parts
Althoguh if you get a real Diablo cable, it has the connector
mounted on a little PCB, with a trasnistion connector and
then a length of ribbon cable on that. If you take off one
end, the wires are in almost the right ordser to solder to a
DEC 'unibus' cable board to link to the RK11-C or whatever. I
wonder why :-)
The RK05 uses a DEC backplane
>block internally, with genuine Unibus cables (RK11D) or a
DEC-style
>paddle connector and 40-pin ribbon cables
(RKV11D, RK8E).
>_Electrically_ the Diablo 30 should be the same as a real
RK05, but
mechanically, the cables are entirely different.
Yeah that was an unplesant surprise!
BTW I found out that the d30 uses an external power supply. Does
anyone have the specs or pinout for it or even an extra PSU?
I thought the manuals were on bitsavers. The PSU pinout
should be in there. There were 2 PSUs from Diablo, one using
a transsitorised regulator, the other using a ferroresonant
trasnformer. DEC also made their own PSU (H734 or something)
for these drives.
Joe
>
>The drive chain also needs to be terminated. In the case
of an RK05,
>it's an M930 Unibus terminator in the
last drive. Not sure about a
>Diablo 30, unless you hang a real M930 off of one of those cable
The Diablo terminator is a PCB stuffed with resistors soldered to the
connector. There's a +5V pin on the connector to power the
terminator, of
course. I have _one_ of them, I also have 2 drives and the
interconnecting cables, so it's not up for grabs.
-tony
4:21 p.m.
New subject: Disk drive parts
Gil,
I have a Diablo 30 and I need cables for it. I've been told that it can
be used with the PDP-8 but I need to find out which interface it requires.
The Diablo Model 30 has a similar interface to the RK05, apart possibly
for the select lines. The Model 30 has 1-of-4 selects (a bit like a
floppy drive), the RK05 _can_ do that, or it can do 3-bit binary selects
(this is seelcted by a pin on the RK05 connector). The former, of course,
allows up to 4 drives per cable, the latter 8.
Anyway, it should be possible to get it to work with an RK8E controller
(IIRC your PDP8 is an Omnibus machine). Maybe you'll have to a add a bit
of logic to sort out the selects, but that's not exactly difficult.
Do you have the PSU for the Model 30? It needs +/-15V at a fairly high
current IIRC.
-tony
2:34 p.m.
New subject: Disk drive parts
At 12:21 AM 8/5/05 +0100, you wrote:
No I don't. I need to find a picture of one and see if I can find one in
the pile of DEC stuff and/or find out the specs for the PSU and see if I
can find something else that will replace it.
Joe
Gil,
I have a Diablo 30 and I need cables for it. I've been told that it can
be used with the PDP-8 but I need to find out which interface it requires.
The Diablo Model 30 has a similar interface to the RK05, apart possibly
for the select lines. The Model 30 has 1-of-4 selects (a bit like a
floppy drive), the RK05 _can_ do that, or it can do 3-bit binary selects
(this is seelcted by a pin on the RK05 connector). The former, of course,
allows up to 4 drives per cable, the latter 8.
Anyway, it should be possible to get it to work with an RK8E controller
(IIRC your PDP8 is an Omnibus machine). Maybe you'll have to a add a bit
of logic to sort out the selects, but that's not exactly difficult.
Do you have the PSU for the Model 30? It needs +/-15V at a fairly high
current IIRC.
11:46 a.m.
New subject: Disk drive parts
of this I have parts for about 6 of these (I think),
Diablo model 30 high
density (512B sect) drives, which on DEC I think would be an RK03. It was a
Yes, the DEC RK03 is the high density Diablo model 30.
2.5 MB removable cartridge disk with a stepping motor
for the head
positioning. I can take pictures if this is not sufficient. These were used
Are you sure about that? The model 30 I know used a permanent magnet
brush motor for the head postiioner, with a rack and pinion mechanism to
actually move the heads. Feedback came from a couple of PCBs on top of
the motor spindle, the tracks of which effectively formed transformers.
-tony
1:17 p.m.
New subject: Disk drive parts
...
Yes, the DEC RK03 is the high density Diablo model
30.
Nope. I am a software guy. Just a bad assumption on my part. I just knew it
was not the voice coil tyoe that I had seem on larger drives.
2.5 MB removable cartridge disk with a stepping
motor for the head
positioning. I can take pictures if this is not sufficient.
These were
used
Are you sure about that? The model 30 I know used a permanent
magnet brush motor for the head postiioner, with a rack and
pinion mechanism to actually move the heads. Feedback came
from a couple of PCBs on top of the motor spindle, the tracks
of which effectively formed transformers.
-tony
7079
days inactive
7094
days old
15 comments
6 participants
participants (6)
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