Path: utzoo!attcan!uunet!tut.cis.ohio-state.edu!rutgers!cbmvax!cbmehq!cbmger!danube!thiger!skraw
From: skraw@thiger.UUCP (Stephan von Krawczynski)
Newsgroups: comp.sys.amiga.hardware
Subject: Re:  scsi-controllers
Message-ID: <01919.034357@thiger.UUCP>
Date: 18 Aug 90 07:13:57 GMT
References: <01789.102311@thiger.UUCP> <02969.AA02969@babylon.UUCP> <01849.011307@thiger.UUCP> <03029.AA03029@babylon.UUCP>
Organization: THIndustries Software Development
Lines: 68

>In article <03029.AA03029@babylon.UUCP> rbabel@babylon.UUCP (Ralph Babel) writes:
>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.

which rom-version? (heard there are quite a few...)

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

he can't help you, it doesn't (at least till today).

>>> - DMA instead of polling,
>> 2. why are these DMA-controllers that slow?
>Who is "these"? Mine isn't slow!

tell me the facts, use some performance-test everybody has and give me the
values (don't forget to mention the exact configuration either).

>>> - no MaxTransfer limit (i.e. 0x7FFFFFFF),
>>
>> you are right, a maxtransfer of 32MB is quite 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?

the problem is: nobody will buy a harddisk-controller for a machine that
comes with one already built-in.

>>> - 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.

have you tested the driver executing a) from rom, b) from fastmem.
we found no measureable effect, did you (and if, how much was it)?

>>> - 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!

read next kickstart-magazine, there it'll be tested (sorry i never
write rumors)

>Ralph

--
best regards, 
stephan von krawczynski 

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