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- Xref: sparky comp.unix.bsd:3157 comp.os.linux:7002 comp.periphs.scsi:3797
- Newsgroups: comp.unix.bsd,comp.os.linux,comp.periphs.scsi
- Path: sparky!uunet!darwin.sura.net!convex!egsner!adaptex!adaptx1!neese
- From: neese@adaptx1.UUCP (Roy Neese)
- Subject: Re: Query: Drivers for AHA >1522< ?
- Organization: Adaptec Inc., Texas
- Date: Wed, 29 Jul 1992 20:41:24 GMT
- Message-ID: <1992Jul29.204124.20791@adaptx1.UUCP>
- References: <2A6B89E3.7DE5@tct.com> <adam.711725819@mcrware>
- Lines: 24
-
- In article <adam.711725819@mcrware> adam@microware.com (Adam Goldberg) writes:
- > chip@tct.com (Chip Salzenberg) writes:
- >
- > >And, just to make followups more likely, (3) what is the difference
- > >between the 1542 and the 1522? Perspiring minds want to know!
- >
- > 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).
- >
- > Given this difference, my inclination is that modifying the 1542 driver
- > to work with the 1522 *could* be significant work. (Or not, depending
- > on how far-sighted Adaptec is).
-
- This would not be a trivial effort as the 1522 is a 1542 without a
- processor, which means the firmware on the 1542 moves to the local CPU,
- so the driver would be much bigger than the 1542 driver and the overhead
- would be much higher.
- ---
-
- Roy Neese
- Adaptec Senior UNIX/SCSI Software Engineer
- UUCP: convex!egsner!adaptex!neese
- Inet: neese%adaptex@cirr.com
-