HELP! 9600 w/291260N and Tempo ATA133 card

HELP! 9600 w/291260N and Tempo ATA133 card

Post by BigPopp » Sun, 17 Aug 2003 08:08:25

anyone get this combination to work? I have twin SCSI hard drives
running very successfully in 9.2.2 and 10.2.6 off of the Adaptec 29160N
SCSI card. Wanted to add a Tempo ATA133 with a large hard drive just
for storage, but cannot get past the happy Mac icon on reboot. Tried
zapping PRAM and even pulling the battery for 20 minutes to reset the
motherboard, nothing. Even different slot combinations. Sonnet says
they have never heard of this problem and Adaptec won't talk to you for
less than $65.00 once your warranty expires. Any ideas would be much

System: Powermac 9600 with ATI 7000 graphics card, 29160N SCSI card
with twin Fujitsu 36g 15K SCSI drives, Audiomedia III sound card,
Adaptec 4300 Firewire card and a gigabyte of RAM (tested!)


HELP! 9600 w/291260N and Tempo ATA133 card

Post by Dan » Mon, 18 Aug 2003 05:43:46

igPoppa < XXXX@XXXXX.COM > wrote:
Try swapping the cards around in the 9600. Some cards are picky about
which bank of PCI slots they're in, as well as what other cards are
sharing the same bank.

I've had similar problems (not with those particular cards tho) which
were solved by placing one particular card in a higher numbered slot
than another particular card. Also, I've had instances where where a
9500/9600 would not boot when a particular pair of cards shared the
same bank but all worked dandy when they were separated to different
PCI banks. Also be aware that any card with a PCI bridge built into the
card itself may prove unusable in a six-slot Mac. USB/FW cards (which
are almost certain to contain a PCI bridge) are notorious for such

FYI, banks are arrainged as 3 upper and 3 lower with the upper bank
also used for a bunch of other logic board IO functions. Best
high-bandwidth-card performance can usually be achieved with such card
in a lower-bank slot. See below for more details.


Dan K

Here's an article from Apple's Info Alley (for 9500, but applies
equally to 9600 and similar clones), not sure where this is to be found
on the web these days so here it is:

Power Macintosh 9500: Optimizing PCI Card Performance

This article discusses Power Macintosh computers using more than three
PCI cards.

In the Power Macintosh 9500, there are six PCI slots (A1, B1, C1, D2,
E2, F2), which are serviced by two PCI controller chips (Bandit 1 and
Bandit 2). Theoretically, each controller chip can handle up to four
PCI cards. However, in order to even the data bandwidth load, three PCI
slots are distributed to each controller. Specifically, Bandit 1
controls slots A1-C1, and Bandit 2 controls slots D2-F2. This
distribution can almost be thought of as two PCI buses with three slots

The slots on the logic board are labeled by letter and number. The
labelling, which is printed next to the slot, is used only to identify
the physical location of the slot on the logic board. Located between
the Power Supply and the bottom of the case, the slots look like:

Power Supply

--------------- PCI Slot A1

--------------- PCI Slot B1

--------------- PCI Slot C1

--------------- PCI Slot D2

--------------- PCI Slot E2

--------------- PCI Slot F2

Bottom of Case

Additionally, the I/O circuitry on the logic board, which controls
functions such as ADB and Serial I/O, was designed to be accessed
through the PCI bus. The I/O circuitry functions as a PCI card built
into the logic board. When considering performance of the PCI bus, it
can be assumed that I/O functions will consume some of the bandwidth of
the PCI bus. Depending on the amount of I/O activity, the PCI bus
handling I/O may run slower than the PCI bus that does not.

On the Power Macintosh 9500, the I/O functions are handled by the first
PCI controller (Bandit 1). Because the first PCI controller handles
both I/O functionality and slots A1-C1, performance of cards in these
slots may be decreased.

In order to achieve optimal performance of PCI cards, slots D2-F2
should be used first. However, when using high-bandwidth cards, which
are moving large amounts of data across the PCI bus, it may be
beneficial to evenly distribute the cards between the two buses. In
such circumstances, it is likely that the I/O bandwidth is much smaller
than that of the high-bandwidth card.