Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!uwm.edu!rutgers!cbmvax!cbmehq!babylon!rbabel
From: rbabel@babylon.UUCP (Ralph Babel)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: scsi-controllers
Message-ID: <03029.AA03029@babylon.UUCP>
Date: 15 Aug 90 05:42:26 GMT
References: <01789.102311@thiger.UUCP> <02969.AA02969@babylon.UUCP> <01849.011307@thiger.UUCP>
Lines: 62

In article <01849.011307@thiger.UUCP> skraw@thiger.UUCP
(Stephan von Krawczynski) writes:

>>> - FULLY functional disconnect/reconnect-protocol
>>    ^^^^^^^^^^^^^^^^
>> Heh-heh! I don't believe this until I've tested it myself!
>
> believe it, it does. does yours ?

Yup, GVP does it.

> A2091/A3000 DOES NOT SUPPORT disconnect/reconnect with
> multiple drives

Steve?

>> - DMA instead of polling,
>
> 1. who polls? do you?

Nope, neither me nor my driver.

> 2. why are these DMA-controllers that slow?

Who is "these"? Mine isn't slow!

>> - no MaxTransfer limit (i.e. 0x7FFFFFFF),
>
> you are right, a maxtransfer of 32MB is quiet limited (of
> course you know a lot of people with A2000 having more than
> 32MB continous memory :-)

So ALF2 is not supposed to work in an A3000?

>> - block sizes != 512 (e.g. 20 meg Bernoullis),
>
> aehm 1.3 FFS?

Yup! 1.3 FFS with a 256-bytes-per-sector Bernoulli!

>> - driver automatically executing out of 32-bit memory,
>
> talking about harddisk-controllers, where is the 32-bit mem?

On my GVP '030 board incidentally sitting in the same A2000
as my GVP SCSI controller.

>> - multiple controller boards supported with a single driver EPROM,
>
> oops, did i tell you something about ALF3? includes EVERY
> feature of ALF2 plus some new ones (like multiple
> controller boards supported with a single driver EPROM :-)

How I _love_ vaporware!

>> - A-Max II support.
>
> i'd rather say A-MaxII supports harddisks than vice versa, wouldn't you?

No, I wouldn't! Get your facts straight!

Ralph