Re: Quantum Fireball with Ramfast

[dempson@atlantis.actrix.gen.nz (David Empson)]

In article <1995Nov5.201009.6826@freenet.victoria.bc.ca>,
Marc Sira <toh@freenet.Victoria.BC.CA> wrote:
> In our last episode, dempson@atlantis.actrix.gen.nz (David Empson) said:
> 
> >"Reselection" is a feature of both SCSI-1 and SCSI-2.  It is not
> >supported by the RamFast, since the RamFast doesn't support the
> >arbitration phase, and has no SCSI ID of its own.
> >
> >If reselection is enabled, the drive will disconnect from the host
> >while a command is being actioned.  When the command is complete (e.g.
> >a READ command is ready to transfer data) the drive will "reselect"
> >the host (i.e. wait for the bus to be free and try to connect to the
> >host, which involves sending the SCSI ID of the host) and transfer the
> >data.
> 
> Interesting. Is it possible, then, to convince the drive not to do this?

It should be.  There doesn't appear to be a jumper to control this, so
I expect it would be necessary to send an appropriate SCSI "MODE
SELECT" command.  I'd have to do some research into the relevant
standards to find out how this is supposed to be done.
-- 
David Empson
dempson@actrix.gen.nz
Snail mail: P.O. Box 27-103, Wellington, New Zealand