Date: Mon, 1 Aug 2005 05:37:53 -0700
From: Aaron <[EMAIL PROTECTED]>
Fortunately (??) I had a MAXpowr G3/500/1M card sitting in an unused
PowerMac 9600 I recently got. So I tried putting it into my PTP. No luck!
When starting up with various installations of OS 9.1 and 9.2.2, the system
bombs, usually just after the words "Starting Up" appear. The message in the
box sometimes refers to "Error 11", sometimes to a "Bus Error", and more
often to a nonspecific system error telling me to try starting up
with extensions
off. (This happens even when I have started up with extensions off!)
Try removing the RAM from your PTP and installing the RAM from your
9600. Perhaps you have some bad or substandard RAM in the PTP.
Moving the RAM may not be a permanent solution but it will help with
the diagnosis.
Install just one stick at a time until you can successfully boot. If
this solves the problem, you may need to test your RAM, which
requires some non-obvious gymnastics to do accurately.
BTW, I have not used the L2 Cache DIMM when trying the MAXpowr G3
card. I didn't use it with the Sonnet and I presume I shouldn't use
it with any
card that has a backside cache.
For best performance you shouldn't use the cache DIMM. However, I
have read of instances where installing the cache made a PTP run
stably, where it wouldn't without the DIMM. Apparently the PTP had
some problems with ringing on the bus or some such and the DIMM
"terminated" it.
P.S. Since the MAXpowr card was running in the 9600 with the switches set for
a Mach V, I'm wondering if the 9600 might have a Mach V motherboard even
though it says "9600/200" on the front. I know that the 9600/200 should have
the L2 cache soldered on the logic board. Where should it be and what does it
look like?
Behind (or in front of depending on your perspective) the PCI slots
there are two largish square chips labeled 343S0020. Behind them
there is a space for four smaller square chips. These four chips are
the cache chips. They'll be installed in the original 9600 board and
missing in the Mach 5/Kansas board.
Another way to tell is to go to Apple System Profiler and read the
ROM Revision under Production Info. A Kansas machine (9600 Enhanced
or 8600 Enhanced) will have $77D.34F5. An original 9600 (or 8600 or
7300) will have $77D.34F2.
A third way to tell is to find the ROM chips on the motherboard.
They're four chips below the DIMM sockets. Each chip is 1.1" X .5"
with 44 pins each, 22 per long side. On the Kansas machine they'll
be labeled 341S0380 through 341S0383. On the pre-Kansas 9600/8600
they're labeled 341S0280 through 341S0283. On the 9500 they're
labeled 341S0168 through 341S0171.
Incidentally, 341S0168 - 341S0171 ($77D28F2) is also the ROM found on
the PTP, PowerWave, 7500, 7600, 8500, S900, J700, many 7200s and
probably the PowerTower, PowerCurve, PowerCenter and PowerCenter Pro.
Jeff Walther
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