RA81 Rides Again! More problems.u

From: Daniel A. Seagraves <dseagrav_at_bsdserver.tek-star.net>
Date: Sat Aug 23 16:48:30 1997

> 1. You've got two RH11's in the system, but (as far as I can tell)
> you've got no Massbus peripherals. Why not pull the RH11 system units?

Okay. I'd like to trim this down to one cabinet anyway.

>
> 2. Why is there no Unibus terminator at the end of the bus? (Or
> did you just leave it out?)
>

Oh, crap. There's the problem?

> 3. Are the M9300's sitting in RH11 system units? Just looking
> at your list above, I can't see why they'd be in the middle of the
> Unibus at all. M9300's are terminators, and unless there's a very
> special reason, they generally are only at the end of the bus.


Not sure, I stuck one on the end of the bus - everything started working!

>
> Generally, I think it'd be wise to pull all the unused cruft (esp RH11's!)
> and get the entire system in one box.
>
> "Not Interrupting" to me often indicates a problem with interrupt
> continuity. And if the interrupts aren't getting through, it's
> extremely surprising that any DMA to your RA81's is being done
> at all...
>

Now it didn't.
Apparently, someone moved some terminators around. Looks fine now!

> Tim.
>
Received on Sat Aug 23 1997 - 16:48:30 BST