QBUS RLV12 and the VAX

[Patrick Finnegan]

On Tuesday 20 September 2005 22:20, todd at compusleuth.com wrote:
> Curt:
>       I saw an old post of yours from 2003 included below, about the
> RLV12.
>
>       I am working on a hobby/project to copy a large collection of
> my old software from RL02. I was wondering if you ever got your RLV12
> to work with the VAX? I was under the impression that because the
> RLV12 controler was old PDP11 DMA it could not handle the VAX MMU, so
> the DMA would write the data to the wrong area of memory? I do know
> that DEC never supported the RLV12 with any QBUS VAX.

I'm not Curt, but I'll answer anyways.  BTW, your email address looks 
familiar. ;)

The RLV11 doesn't work on a VAX, because it can only do 18-bit 
addressing, not 22-bit addressing.  The RLV12 works fine on a VAX, as 
SRM and VMS both identify it, and use it properly.  I've made images of 
quite a few RL02 carts using VMS's BACKUP/PHYSICAL command.

Pat

> > Hi,
> >
> >   I've got an RL02 connected to my Vax 4000-200 through an RLV12
> > QBus controller.
> >
> >   The Drive is spinning up fine and the Ready light is Lit, the
> > Fault light goes off once power to the Vax is started and doing a
> > SHO DEV at the
>
> Chevron
>
> > prompt and within OpenVMS both show:
> >
> > RLV12 Controller 0 (774400)
> >  -DLA3 (RL02)
> >
> > Which looks great from my perspective, the drive ID plug is a 3, so
> > DLA3
>
> makes
>
> > total sense.   In the SHO DEV within OpenVMS does display the drive
> > as
>
> being
>
> > online.
> >
> > So my problem is with MOUNT, everytime I go to mount the drive the
> > system simply hangs and never seems to complete the mount, I end up
> > having to
>
> CTRL-
>
> > BREAK to Halt the system back to Chevron and b up again from my
> > DSSI DIA0:
> >
> > Anyone have any idea's what I'm doing wrong or what may be wrong???
> >
> > I've tried with a /FOREIGN too since this platters are from an
> > 11/730
>
> and many
>
> > of the handwritten labels on the disk paks say RSTS on them, so I
> > wasn't
>
> sure
>
> > if it was a format issue or something, I could really use some
>
> help/advice from
>
> > anyone with a lot of experience with the quirks of the RL's.
> >
> > Thanks much,
> >
> > PS:  If anyone has an RK05 or RK07 DECPack for sale and possibly an
>
> RKV11D Qbus
>
> > controller I am in the market for one.
> >
> > Curt

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