Re: What's wrong with Revision B SCSI?

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

Wayne Stewart <waynes@intergate.ca> wrote:

> The Byter <cabalslexicon@hotmaill.com> wrote in message news
> > In the FAQs and other resources I find on the net, it seems that the
> > card to have is either a RAMFast, Apple High Speed, or Revision C SCSI
> > card.  The one I have is a Revision B, and I got it working with an
> > old and tiny (5.25" full height 2 gig drive circa 1991) last night on
> > my //gs.  
> > 
> > I haven't installed GS/OS on it yet, but can access it fine (well,
> > 32mb of it at least) in Prodos.
> > 
> > Am I asking for trouble working with a revision B card?
> 
> A rev B is only really a problem if you want to run GSOS
> The Rev C also has support for a couple of Apple CD drives.
> The Rev C upgrade is just a replacement EPROM so if you can 
> find someone with the correct Eprom and a burner you're laughing

It is also worth noting that the revision A and B cards have a
potentially lethal feature lurking in their firmware: 

The SmartPort command code which is used for EJECT on 3.5" drive
controllers and later SCSI cards means FORMAT on the revision A and B
SCSI cards.

If an application doesn't bother to check the device it is controlling,
it could accidentally format your hard drive when attempting to eject a
3.5" disk.