Re: Apple II SCSI Card Rev. A

["Bill Garber" <willy46pa@comcast.net>]

Thank you David, and sorry about the HTML, I have it off now, I believe,
someone will tell me if not, I am sure.
Your info was concise and to the point, and I appreciate it. Bill

"David Empson" <dempson@actrix.gen.nz> wrote in message
1fn6rx7.y3q4dy1c7pdxkN%dempson@actrix.gen.nz">news:1fn6rx7.y3q4dy1c7pdxkN%dempson@actrix.gen.nz...
> Bill Garber <willy46pa@comcast.net> wrote:
>
> > This is a multi-part message in MIME format.
>
> Can you please turn off HTML/MIME encoding for posting articles to
> newsgroups.  It looks really horrible for those of us who are using
> traditional text-only newsreader software, not to mention the waste of
> bandwidth.
>
> > Well, I bought one of these, and I need help partitioning an 80 meg
drive
> > and formatting it so I get the partitions writeable and not failing.
>
> If you are having problems, the first thing to check is that your SCSI
> bus is terminated correctly.
>
> If you have a single hard drive connected to the card, the bus should be
> terminated at the hard drive, either using internal termination
> resistors or a piggyback terminator on the unused connector on the drive
> enclosure.
>
> It is also necessary for at least one device to supply power for the
> termination.  The Apple SCSI cards didn't originally do this, because
> supplying termination power has the potential to place heavy load on the
> Apple II power supply.  Apple added termination power on later releases
> of the High-Speed SCSI card, and it can be retrofitted to earlier models
> by soldering a diode onto the card.
>
> If possible, you should use a hard drive which supplies termination
> power.  All the Quantum drives I encountered did so, but I don't know
> what the situation was with other brands.
>
> The FAQs for comp.sys.apple2 may contain some useful information in this
> area.
>
> If you appear to have correct termination, you might like to try
> changing your SCSI cable - some are better quality than others.
>
> > I understand I need the Rev. C or D Rom for it, but how and where do I
get
> > it, and then do I need to solder or what?
>
> Check the number printed on the label on the EPROM chip on the card.
> You might already have the latest firware (revision C).
>
> 341-0112A   is revision A
> 341-0112B   is revision B
> 341-0437-A  is revision C
>
> If you currently have revision A or B firmware, upgrading to revision C
> gives you some bug fixes, adds support for a limited range of CD-ROM
> drives, and allows the card to be used under GS/OS on an Apple IIgs.  It
> also allows you to use a wider range of software.  For example, "Chinook
> SCSI Utilities" will only support this card if revision C firmware is
> installled.
>
> If you are using the card in 8-bit mode on the IIgs (or on a IIe or II+)
> then you should be able to get it working with reivsion A or B firmware,
> using the partitioning software supplied with the card (HDSCPARTITION).
>
> Upgrading the firmware requires replacing the EPROM on the card.  You
> will need to get hold of a 27C128 EPROM (16K bytes), a copy of the
> firwmare image, and find someone who can burn the firmware image into
> the EPROM.  (Incidentally, revisions A and B use a smaller 8K byte
> EPROM, so you can't erase and reuse the one that came with the card,
> even if that would be a good idea.)
>
> --
> David Empson
> dempson@actrix.gen.nz