1 Aug
2011
1 Aug
'11
9:40 p.m.
I am in the process of adding a TMA-11 tape controller with a TS03
tape drive to my PDP-11/10 system
which has a single RK05 drive attached. There no other devices attached.
I removed the Unibus terminator out of the RK05 and connected the BC11
cable in it's place. The cable
then goes to the TMA-11 controller. The TMA-11 controller does have a
terminator as well (ie. it is the
end of the Unibus).
Previously, the PDP-11/10 and RK05 worked as expected.
Now that the TMA-11 controller is connected, the RK05 drive does not
spin up. When the 'Load' button is
pressed on the RK05, I do hear the door lock solenoid engage, but the
drive spin up. If the system is
powered down and the cable to the TMA-11 is disconnected, the drive
does spin up.
Any ideas on why the RK05 would refuse to spin up when connected to
the TMA-11? I am just looking
for some pointers to narrow my search.
Thanks!
--barrym
2 Aug
2 Aug
5:26 a.m.
If the RK11-D in the last thing on the bus, remove the M930 terminator
and place the BC11-A cable going to TM11 there, and then terminate the
Unibus in the TM11. The RK05 can only be connected to another RK05
(or RK03), or the terminator.
I hope that solves your problems, and good luck, that's a nice system.
Paul
On Mon, Aug 1, 2011 at 4:40 PM, B M <iamvirtual at gmail.com> wrote:
I am in the process of adding a TMA-11 tape controller
with a TS03
tape drive to my PDP-11/10 system
which has a single RK05 drive attached. ?There no other devices attached.
I removed the Unibus terminator out of the RK05 and connected the BC11
cable in it's place. ?The cable
then goes to the TMA-11 controller. ?The TMA-11 controller does have a
terminator as well (ie. it is the
end of the Unibus).
Previously, the PDP-11/10 and RK05 worked as expected.
Now that the TMA-11 controller is connected, the RK05 drive does not
spin up. ?When the 'Load' button is
pressed on the RK05, I do hear the door lock solenoid engage, but the
drive spin up. ?If the system is
powered down and the cable to the TMA-11 is disconnected, the drive
does spin up.
Any ideas on why the RK05 would refuse to spin up when connected to
the TMA-11? ?I am just looking
for some pointers to narrow my search.
Thanks!
--barrym
8:50 a.m.
On Mon, 1 Aug 2011, B M wrote:
I removed the Unibus terminator out of the RK05 and
connected the BC11
cable in it's place. The cable
then goes to the TMA-11 controller. The TMA-11 controller does have a
terminator as well (ie. it is the
end of the Unibus).
Ouch! It's not Unibus going to the RK05! You have to plug the BC11 cable
into the "Unibus out" slot of the RK11 backplane.
Any ideas on why the RK05 would refuse to spin up when
connected to
the TMA-11? I am just looking
The one is a disk drive, the other a tape controller. How should that
work?
Christian
4:22 p.m.
From: "Christian Corti" <cc at informatik.uni-stuttgart.de>
Sent: Tuesday, August 02, 2011 10:50 AM
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk at classiccmp.org>
Subject: Re: RK05 and TMA-11
On Mon, 1 Aug 2011, B M wrote:
Yeah :-( I once made the same mistake. DIGITAL used BC11 cables for
more than only UNIBUS system unit interconnections. Other examples
of BC11 cable usage is the RK05 drive connection and the TS03 control
board (underneath the TS03 unit) to the TMB11.
In my case I was so stupid to connect a BC11 cable connected to the
control board underneath the TS03 to the UNIBUS-OUT of the last system
unit. It did not work; I did not know that a controller (TMB11) was
required. (no magic smoke though ...)
So, the RK11-D (RK05 controller 4-slot system unit) has a UNIBUS-IN at
slot 1 position A-B, and a UNIBUS-OUT at slot 4 position A-B.
Slot 2 position A-B has the BC11 cable that goes to the RK05 drives
and *nothing else*.
Slot 3 position A is for a old-style power harness.
For the TMB11 (also 4 slot system unit) UNIBUS-IN at slot 1 position
A-B, and a UNIBUS-OUT at slot 4 position A-B. Slot 4 position A-B has
the BC11 cable to the controller board underneath the TS03, and slot 3
position A-B has the M930 terminator for the bus to the TS03 controller.
I hope you did not fry any logic by connecting the "RK05 UNIBUS" to the
TS03 ... In my case the TS03 does not seem to work, so I will have
to check out the controller board!
- Henk.
I removed the Unibus terminator out of the RK05
and connected the BC11
cable in it's place. The cable
then goes to the TMA-11 controller. The TMA-11 controller does have a
terminator as well (ie. it is the
end of the Unibus).
Ouch! It's not Unibus going to the RK05! You have to plug the BC11 cable
into the "Unibus out" slot of the RK11 backplane.
Any ideas on why the RK05 would refuse to spin up
when connected to
the TMA-11? I am just looking
The one is a disk drive, the other a tape controller. How should that
work?
Christian 
7:08 p.m.
Now that the TMA-11 controller is connected, the RK05
drive does not
spin up. When the 'Load' button is
pressed on the RK05, I do hear the door lock solenoid engage, but the
drive spin up. If the system is
powered down and the cable to the TMA-11 is disconnected, the drive
does spin up.
Any ideas on why the RK05 would refuse to spin up when connected to
the TMA-11? I am just looking
for some pointers to narrow my search.
IIRC, an RK05 will not spin up (and will retract the heads and spin down)
if ACLO or DCLO are asseted (I forget if it's just one of those signals,
or either of them), the idea being to shut the drive down safely if the
mains fails.
Could the TMA-11 be asserting these signals? If it has its own PSU (and I
would ahve thought it did), is it possible that this is failing in some
way and cuasing the singal to be asserted?
-tony
7:20 p.m.
I am in the process of adding a TMA-11 tape controller with a TS03
tape drive to my PDP-11/10 system
which has a single RK05 drive attached. There no other devices attached.
I removed the Unibus terminator out of the RK05 and connected the BC11
Do you mean 'RK05' here? While the RK05s use Unibus cables and
terminators (M930), the signals are most certainly not Unibus.
The RK11 controller (may be an RK11-C or an RK11-D) has Unibus In and
Unibus Out connections and a connection of the cabel to the drive.
Assuming the RK11 is the last device on the Unibus, remove the M930 from
its Unibus Out slot, and plug a cable between there and the Unibus In
connector on the TMA-11
-tony
4899
days inactive
4900
days old
5 comments
5 participants
participants (5)
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ard＠p850ug1.demon.co.uk -
cc＠informatik.uni-stuttgart.de -
henk.gooijen＠hotmail.com -
iamvirtual＠gmail.com -
useddec＠gmail.com