Subject: Re: State of Powertec support ?
To: Mark Brinicombe <amb@physig4.ph.kcl.ac.uk>
From: Ale Terlevich <A.I.Terlevich@durham.ac.uk>
List: port-arm32
Date: 10/28/1996 13:30:38
On Mon, 28 Oct 1996, Mark Brinicombe wrote:
> > That's not the worst part! As the driver polls, it soaks up all the CPU
> >while it's doing this 110Kps (if it's the same as the Cumana that is!)
>
> Ok just to clarify things ...
>
> Adding interrupt support will not improve the transfer rates but will release
> the CPU to get on with other processes while waiting for I/O
>
> Transfers rates increases will require DMA support.
But if you disable DMA transfers under RiscOS (*unplug DMAManager) you
still get far higher than the 110Kps transfer rates seen under RiscBSD.
Why then are the SCSI drivers so slow?
Confused,
Ale.