Subject: Re: VS4000 SCSI: status
To: Matt Thomas <matt@3am-software.com>
From: Anders Magnusson <ragge@ludd.luth.se>
List: port-vax
Date: 03/09/2000 19:45:25
> At 04:00 AM 3/9/00 , Anders Magnusson wrote:
> > > 
> > > The only problem i have now is that occasionally the KA46 seems to lose an
> > > interrupt.  Can't seem to figure out why.
> > > 
> >Is it interrupts related to only the SCSI chip, or is it for other 
> >things also?
> 
> Just the SCSI chip.
>
Have you checked if the DMA transfer is finished when the interrupt
is generated? On machines with 5380 it sometimes generates interrupts
but the DMA hasn't finished (or sometimes hasn't even started!) due
to the FIFO buffer in the DMA chip, so I have to busy-wait until the
buffer is drained.

-- Ragge