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- From: miff@asharak.apana.org.au (michael smith)
- Subject: Re: Just a couple of things.
- Date: Wed, 27 Apr 94 08:26:50+1030
- In-Reply-To: <9404271422.AA20250@hpbeo79.bbn.hp.com> from "Claus Brod " at Wed, 27 Apr 94 16:22:13 MESZ
- Message-Id: <Up-ED2GDJZC@asharak.apana.org.au>
- Mime-Version: 1.0
- X-Software: Atari UUCP UPoint light (22. Jan. '94)
-
- In <9404271422.AA20250@hpbeo79.bbn.hp.com> you wrote :
-
- >> Well, at least with source code to the CBHD driver, we would be able
- >> to make such a driver. Making the driver respond to interrupts instead
- >> of polling can't be that big a problem. At least not when all the
- >> scsi setup code can be ripped off this driver. How much work it will
- >> be to setup the queues of processes wanting to do IO under MiNT
- >> I won't comment on.
- >
- >It's certainly not trivial to get all debugged, but it's not the
- >biggest issue. We need kernel reentrancy first, that's the main
- >problem.
-
- Bingo!
-
- While we are talking about all this, and people are writing lots of code
- to talk to the SCSI port(s)...
-
- Can we _please_ have a low-level SCSI driver that knows _nothing_ about
- filesystems or disks or anything like that?
-
- And (just to really make your day) one that can be both requestor and target.
- You could add disconnect and command queueing too.
-
- Why, you ask? Well, the alternative will be to _poll_ some non-disk SCSI
- devices (can you spot someone who's actually working on his mythical
- ethernet box? 8), which won't do much for system performance.
-
- I have spent many hours wondering how I was going to have the box interrupt
- the atari, and now I know 8).
-
- >From the software side, it would be ideal if
-
- : The low-level code kept a table of the device identify pages
-
- : It were possible for multiple drivers to register interest in
- interrupts from a given ID (don't ask 8)
-
- Probably more thoughts as I get deeper into things, but that should
- keep you busy for now 8)
-
- >Claus Brod, MDD, HP Boeblingen Have you hugged your manager today?
-
- BTW Claus, loved the book 8) (does the latest CBHD do TT-scsi as well?)
-
-
- --
- --
- mike smith : silicon grease monkey | If you think it can't be done, |
- miff@asharak.apana.org.au | it means you don't have enough |
- miff@apanix.apana.org.au | money in your budget. |
-
-