🚀 go-pugleaf

Allan Reynolds <allan@phantech.co.uk> wrote:

> I am looking to add some stuff to me SE/30 but I am quite new to Macs and I
> am unsure if I am able to just connect any SCSI device or if it has to be
> specific to the Mac?
> I am looking at adding an extra HD and a CD-ROM external of course.  I also
> have a SCSI scanner which when connected to the Mac is identified and I have
> the drivers for it from the WWW but I dont have any software to try it and I
> was wondering if anyone knew of any free scanning software for the mac?
> 
> Allan

In principle you should be able to connect any SCSI device. However,
some more recent SCSI devices will, I believe, be SCSI II which I doubt
will be compatible with the SE/30.

Of course, you will also need the appropriate Mac drivers for the
device.

Watch for termination problems - some SCSI devices are internally
terminated, other have no termination. You made need to remove/switch
off internally terminated devices to get the whole chain working. Only
the last device should be terminated.

Remember that there is a limit to the number of SCSI devices. I think
it's 8.

Finally addressing - each device must have its own address 0 up to 7.
The higher the address, the higher the priority, I think - or perhaps
it's the other way round:) The Mac itself will be address 7. The
internal HD may or may not be on the SCSI chain - I don't think it is
with a SE/30.

I'd expect the scanner software to be proprietary. However, several of
the manufacturers make their software available at web sites. I borrowed
a HP Scanner from work where it is connected to PCs (wash my mouth out
with soap) and managed to get the HP Mac software from their web site.

-- 
Larry Stoter
17, Rocks Park Road, Uckfield, E. Sussex, TN22 2AT, UK
email: LPS@teknesis.demon.co.uk
Phone/Fax: +44 (0)1825 767967

In article <1998020808385021123@teknesis.demon.co.uk>,
LPS@teknesis.demon.co.uk (Larry Stoter) wrote:

> Allan Reynolds <allan@phantech.co.uk> wrote:
> 
> > I am looking to add some stuff to me SE/30 but I am quite new to Macs and I
> > am unsure if I am able to just connect any SCSI device or if it has to be
> > specific to the Mac?
> > I am looking at adding an extra HD and a CD-ROM external of course.  I also
> > have a SCSI scanner which when connected to the Mac is identified and I have
> > the drivers for it from the WWW but I dont have any software to try it and I
> > was wondering if anyone knew of any free scanning software for the mac?
> > 
> > Allan
> 
> In principle you should be able to connect any SCSI device. However,
> some more recent SCSI devices will, I believe, be SCSI II which I doubt
> will be compatible with the SE/30.

SCSI II equipment is fully compatible with the SE/30. *WIDE* scsi devices
are not, nor are *DIFFERENTIAL* SCSI devices.

> Of course, you will also need the appropriate Mac drivers for the
> device.

This is completely correct. Get FWB's Hard DIsk Toolkit and CD-ROM toolkit
to provide drivers for SCSI hard disk and CD-ROMs respectively.

> Watch for termination problems - some SCSI devices are internally
> terminated, other have no termination. You made need to remove/switch
> off internally terminated devices to get the whole chain working. Only
> the last device should be terminated.

Also completely correct.

> Remember that there is a limit to the number of SCSI devices. I think
> it's 8.

Yes indeed, but this includes the Mac and the internal hard disk. You
can have a maximum of six external SCSI devices.

> Finally addressing - each device must have its own address 0 up to 7.
> The higher the address, the higher the priority, I think - or perhaps
> it's the other way round:) The Mac itself will be address 7. The
> internal HD may or may not be on the SCSI chain - I don't think it is
> with a SE/30.

The addresses have equal priority on the SCSI bus. The only time the
address is significant is on start-up if no start-up disk has been
selected in the StartUp Disk control panel. The Mac then checks the 
scsi devices in order from 6 down to 0.

The internal disk on a Mac will always be 0 (unless someone has foolishly
changed it - use the free SCSIProbe control panel to check).

Paul Durrant

Steve Firth <filter@firthcom.demon.co.uk> wrote:

[snip]

> > Remember that there is a limit to the number of SCSI devices. I think
> > it's 8.
> 
> 7, since address #7 is the Mac. Six external devices since the internal
> drive is usually #0.

You could quibble and say that the Mac itself counts as a SCSI device,
so you can have 8 SCSI devices on a SCSI bus - 7 plus the controller.

[snip]
> With scanners you need to be sure that they are SCSI devices, some use a
> SCSI socket but are designed for use only with a proprietary interface
> card. Next you need driver software, and preferably you need an acquire
> plug-in for Photoshop. Now we get to the nasty bit, it is usually much
> cheaper to buy a scanner complete with Photoshop than it is to buy
> Photoshop on its own.

And do find out which version of Photoshop - Photoshop LE is often
bundled with scanners, and it's a severely sawn-off version of the full
beastie.

Rowland.

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