In a message David Elmo <[EMAIL PROTECTED]> writes:
<< In-Reply-To: <[EMAIL PROTECTED]>
> Subject: [PCI] Number of starts for my 7600 today...
> From: David Elmo <[EMAIL PROTECTED]>
> Took 12 starts and restarts to get my 7600 fully booted today. It is so
> fascinating ... and it rocks and is a rock for the rest of the day...
> Yesterday, a miracle and only 3 starts... Average is 4 for last month.
>
> David Elmo
Today, 15 starts. But Gauge Pro in a spare moment when I have a break, has
come up with a memory error, which might explain all this nonsense that has
been
going on for so long. "Memory Error at address $01FF4AB4 but read $05FF4AB4"
I don't suppose anyone can say how i can usefully use this notice to pinpoint
the chip concerned? If the following gets all unwrapped, I am sorry.
Memory overview
Disk cache: 8160K
Virtual memory: is off
Built-in memory: 832 MB
Location Size Memory type
B4 128 MB DIMM
A4 64 MB DIMM
B3 64 MB DIMM
A3 64 MB DIMM
B2 128 MB DIM
A2 128 MB DIMM
B1 128 MB DIMM
A1 128 MB DIMM
External L2 cache: Not installed>>
----------------------------------------
My reply:
There has been an incredibly good discussion on the G-list last week
concerning the testing of DIMMs with Gauge Pro.
See these links to G-List archives -- be warned these are very long posts.
<http://www.mail-archive.com/g-list%40mail.maclaunch.com/msg38676.html>
<http://www.mail-archive.com/g-list%40mail.maclaunch.com/msg38739.html>
>From these post it is believed the RAM used at startup is either the first
slot, the last slot or possibly both. This theory predates the release of G3's
and should apply to PCI Macs. The G's have only one bank of RAM and most of our
beloved PCI Mac have two.
So . . . assuming this premise if correct; I would remove the DIMMs in A1,
B1, A4, B4 and run Gauge Pro again. If 7600 starts up OK and Gauge Pro comes up
negative you have isolated the bad DIMM to 4 chips. From there you can use the
"sandwich" method as described in the links above to find the defective chip.
This all assumes (2nd assumption) that your startup problem is a result of
defective RAM.
HTH --glen
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