From: wjolitz@soda.berkeley.edu (William F. Jolitz) Subject: Re: Query: Drivers for AHA >1522< ? Date: 21 Jul 1992 18:08:24 GMT
In article <adam.711725819@mcrware> adam@microware.com (Adam Goldberg) writes:
>...The 1542 is a bus-mastering controller. This 1522 is not. That makes
>the 1542 much faster (at least in a protected-mode OS like Linux, with
>properly written drivers).
One of the reasons that 386BSD works so well with the 1542B is the
bus-mastering, the advantages of which are lost on DOS. There may
be a false economy in getting a 1522, because the entire advantage
of going to SCSI is the bandwidth improvement over the programmed I/O
AT/IDE controllers. Granted, the device should be supported, but not
necessarily encouraged.
Bill.