Subject: Re: Quadra 840AV
To: Colin Wood <cwood@ichips.intel.com>
From: Henry B. Hotz <hotz@jpl.nasa.gov>
List: port-mac68k
Date: 10/02/1997 16:36:02
At 1:30 PM 10/2/97, Colin Wood wrote:
>Cool!  Fastest '040 Mac made...I wish I had one ;-)

Actually I think the 950 is faster, and can be upgraded to have two DMA
SCSI chains as well.  The people on the A/UX newsgroup claim that it was
faster as a real server than many newer, higher-priced machines for many
years.  I'm not sure if A/UX was ever ported to the AV Quadra's.  Of course
neither A/UX, nor MacBSD will ever take advantage of the DSP chip (I don't
think).
>
>> My standard booting OS is 7.1, but this machine is too new to be supported.

>From what I've heard here, 7.6.1 should be snappy enough (supposedly
>faster than 7.5.5) especially on an 840AV, and probably stable enough as
>well.

Is that what you use?
>
>> Since there has been a lot of work on the newer Mac's since 1.2.1 I expect
>
>Since 1.2.1 probably won't even boot with an NFS disk and a serial console
>on that machine, you'll have to go with -current.

Oh, is it *that* bad?  How quickly we forget.
>
>The AV Quadra's were the only 68k-based Macs with true DMA (although I
>think that the IIfx had something DMA-ish).  This is not supported yet,
>tho :-(

I thought the fx had DMA, but someone corrected me on the list, saying that
data is copied to IOP memory and the IOP does programed IO.

Thanks for the feedback.

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