Re: GS memory problem

[Stephen Shaw <stephen@apple2.org.invalid.za>]

On Fri, 14 Jun 2002 09:29:31 -0400, Jim Pendarvis wrote:

>
> Thanks David for your informative response.
>
> The memory card is Apple. The error # is 308.
>
> I've tried reseating the chips, but that didn't help. 2 banks are TI, 1
> bank is Oki, and the other is a mix of TI and Oki. I don't know if that
> would matter.

Shouldn't matter but there is many a slip 'twixt cup and lip. Try putting all
TI or all OKI.

>
> Would someone please send me a copy of the memory test program
> "MemoryTest.CL" that David mentions below?

I wonder if the AE test would help?

>
> thanks, jim
>
> On Thu, 13 Jun 2002, David Empson wrote:
>
>> Jim Pendarvis <jpendarv@patriot.net> wrote:
>>
>> > I picked up a Rom 1 GS this weekend. The memory card is fully populated.
>> > The control panel recognizes the memory. Running the built-in system test
>> > ends with "system good".
>>
>> Unfortunately, the built in test doesn't test the memory expansion card,
>> only the motherboard RAM.  You will need a separate memory test program
>> to do it properly.
>>
>> What brand is the memory expansion card?  Apple never supplied any
>> memory testing software for their 1MB card, but most third party cards
>> included test software which were able to show the location of the fault
>> on a picture of the card.
>>
>> > But I can't run GS-OS. Sometimes it just beeps and hangs. Other times I
>> > get an error message (#307?) about trashed memory. A few times I've ended
>> > up in the monitor.
>> >
>> > I suspect a memory problem.
>>
>> Me too.  System error 0308 is one of the classic symptoms of a faulty
>> chip on your memory expansion card (or some other fault on the card).
>>
>> It could  be a memory corrupting bug in your system software or an
>> application, but this isn't very likely.
>>
>> The other classic symptoms of memory corruption are system errors 0681
>> and 0682.
>>
>> Error 0307 ("unsuccessful firmware task") is pretty unlikely to occur,
>> so I assume you misquoted the number and it was actually 0308 ("damaged
>> heartbeat queue").
>>
>> > How can I tell for sure? and how would I identify the problem chip(s)?
>>
>> A memory tester run for a while should reveal a fault.  The only program
>> I can suggest off the top of my head is "MemoryTest.CL", which is
>> supplied with AppleWorks GS.  I seem to recall it being very reliable at
>> finding faults.
>>
>> It can pinpoint a fault to a bank number (and might indicate which bit
>> within the byte is faulty - I don't recall).
>>
>> Once you have the bank number, you need to identify which physical row
>> on the card is affected, and which chip within the row.  The best way to
>> handle this is to get the information from someone else who has the same
>> card and knows how it is laid out.  If necessary, you can locate the
>> faulty chip with systematic swapping and rearrangement (assuming there
>> is only one faulty chip).
>>
>> It might be as simple as a poor connection between one chip and its
>> socket - try removing and reinserting all of the RAM chips (observing
>> the usual antistatic precautions, of course).
>>
>> --
>> David Empson
>> dempson@actrix.gen.nz
>>

-- 
--

Remove the invalid from my e-mail address to reply to me directly.

You mean 15" sparks are supposed to come out of this thing?