PDP-11/23+ and rx-02 drives, need help!!!

[Tony Duell]

> > I'm not a 'Qbus person', much prefering Unibus machines, but IIRC one of
> > the ST506/RX50 controllers (RQDX1 I think) had to be the last device on
> > the bus since it didn't pass on grants. If that's the controller you
> > have, then the RXV21 would mever get BGs or NPGs and woul;d probably do
> > what you're seeing. Try putting the RXV21 first...
> 
> Especially since the boot ROMs pull the boot sector off the floppy
> without interrupts. You should see some activity, hear heads,

Err, yes, but data transfer on the RXV21 always used DMA (NPR/NPG 
signals). If the RXV21 never sees a non-processor grant, it'll never 
transfer any data.

-tony