11/45 works, but....

[Gooijen, Henk]

________________________________

Van: cctalk-bounces at classiccmp.org namens Jay West
Verzonden: ma 19-03-2007 15:46
Aan: General Discussion: On-Topic and Off-Topic Posts
Onderwerp: 11/45 works, but.... 

> The 11/45 has booted an OS for the first time since I got it. RT11 came
> right up. Interrupts are working. Awesome :) That's actually very satisfying
> because the machine was in very rough shape when I got it.

Very nice!

[...snip...]

>Another oddity reared it's head. The system was very stable with just the RL
>controller. I then installed an RX02 (M8256) controller (and removed the NPR
>jumper for that slot). I turned on the system but left the RL02 turned off.
>The RX02 worked perfectly. Then I turned on the RL02. It powered up ok (no
>fault) but when I spin it up I got a fault light. It is not the drive, nor
>is it the pack. If I shut everything down and leave the RX02 drive powered
>off (but controller still installed), the RL02 will come up fine and not
>fault. So there is apparently something that the RL controller doesn't like
>about the RX02 controller? The NPR jumper is removed for the two slots where
>the RL and RX controllers are, but definitely present in all other slots.

FWIW, I know that when RT11 runs and you remove the "READY" cap,
changing it from drive #1 to, say, drive #2, RT11 freezes. Of course, no I/O
activity is going on!  Perhaps powering the RL02 has effects?
What happens if you turn on the system and the RX02 _and_ RL02 are
powered up at the same time?  That's what I do with my 11/34C, and works fine.
Power requirements for an RX02 and RL02 are not that high.
Correct that the NPR jumper (CA1-CB1) is cut for RL11 and RX211 controller.
 
- Henk.
 
 


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