Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!cbmvax!daveh
From: daveh@cbmvax.UUCP (Dave Haynie)
Newsgroups: comp.sys.amiga.tech
Subject: Re: Hard Drive/Controller
Message-ID: <8683@cbmvax.UUCP>
Date: 22 Nov 89 16:46:25 GMT
References: <1989Nov21.224423.3829@athena.mit.edu>
Organization: Commodore Technology, West Chester, PA
Lines: 35

in article <1989Nov21.224423.3829@athena.mit.edu>, rlcarr@athena.mit.edu (Rich Carreiro) says:
> Keywords: SuQuest HardFrame A2091

> 1) Which is faster, HardFrame or A2091?

Don't know if anyone's done a comparison yet.  They should be about even I'd
think; should be an interesting comparison at best.  They sound like they
do pretty much the same kind of thing.  The main places for a difference
will be in FIFO size (which determine how many times you need to get on and
off the bus) and the efficiency of the device driver (both are written in
assembler, I believe, and both will run from the actual autoboot ROM, so
there shouldn't be much foot dragging here).

> 2) Does the A2091 fix the DMA/overscan slowdown problem of the A2090(a)?

Completely.  Obviously, there's some degree of unavoidable slowdown if you're
using all the chip bus bandwidth for video display as covered in previous
articles, but the 2091 knows how to deal with this as effectively as possible,
so no FIFO overruns ever occur.

> 4) Does the HardFrame work with the 6.2 motherboard?

Yes.

> 7) Can the A2091 be cabled to a drive in the 5-1/4" bay?  To a drive in
>    en external chassis?

Yes, it has both internal 50 pins SCSI ribbon cable and external Macintosh
style 25 pin D connector.

> Rich Carreiro - Most Biased Boston Celtics Fan!     Get well soon, Johnny Most!
-- 
Dave Haynie Commodore-Amiga (Systems Engineering) "The Crew That Never Rests"
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