[comp.sys.atari.st] DMA/Hard Disk Reset

neil@cs.hw.ac.uk (Neil Forsyth) (05/05/88)

I heard a rumour (nothing more, nothing less) that the Atari Hard disk drives
don't use the reset pin from the DMA port. Is this true? Anyone care to
comment.

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david@bdt.UUCP (David Beckemeyer) (05/10/88)

In article <1813@brahma.cs.hw.ac.uk> neil@cs.hw.ac.uk (Neil Forsyth) writes:
>
>I heard a rumour (nothing more, nothing less) that the Atari Hard disk drives
>don't use the reset pin from the DMA port. Is this true? Anyone care to
>comment.

It's my understanding that the RESET makes it to the Host Adapter board,
but doesn't go any farther than that (i.e. it's not passed on to the
SCSI controller).

I believe that this is not unique to the Atari HD.  I think it also
applies to the Supra host adapter too.   I don't know about ICD.  I think
BMS is the only one that passes the RESET to the SCSI controller.  It
appears though that Supra does some special things on RESET.
-- 
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Beckemeyer Development Tools		| have to do is to know in advance what
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stone@amc-vlsi.UUCP (Glen Stone) (05/17/88)

Hi,
  The ram disk chip uses it, and it is passed on. I'd assume that
all controllers would use as it seems to be quite easy to hang the
protocol.

I have off-loaded distribution of the ram disk chip to a company
called Ronsat Technologies, (312) 520 8003.  They will be making
a complete ram disk package etc. They are located in the U.S.

Glen Stone
(I'm moving CA, and will be off the net for a while. My new job 
does have net access so I will return )