R80/RA81 diagnostic experience?

From: Johnny Billquist <bqt_at_update.uu.se>
Date: Mon Mar 8 12:25:59 2004

On Mon, 8 Mar 2004 Brad Parker <brad_at_heeltoe.com> wrote:

> Gooijen H wrote:
> >A little info can be found here:
> >www.pdp-11.nl/peripherals/disk/ra81-info.html
>
> thanks!
>
> >Did you tension the belt with the lever at the right-hand side (at
> >least there it is in an RA81 drive)?
>
> I did, and it seems to be right, but who knows. Is there any sort of
> lock out or micro switch which senses proper belt tension?

Yes, I think so. Also, there is a transport safety for the heads. It's a
lever on the HDA, which you should turn to unlocked.

Does the R80 have the terminal interface on one card like the RA8x drives
do? If so, plug a terminal in there and talk with the drive. 1200 bps I
think, though it could be 300. 8N1.

> This is an R80 drive, btw. I'm assuming the RA80, RB80 and RM80 are all
> very similar at the drive end (not the controller end - which is very
> different).

Yes, it's the same HDA.

        Johnny

Johnny Billquist || "I'm on a bus
                                  || on a psychedelic trip
email: bqt_at_update.uu.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
Received on Mon Mar 08 2004 - 12:25:59 GMT

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