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.