Re: Unclaimed Sound Interrupt?

[Michael J. Mahon <mjmahon@aol.com>]

"ict@ccess" <gids.rs@sasktel.net> wrote:
> On Nov 16, 12:18 am, oz390gta <oz390...@gmail.com> wrote:
>> On Nov 15, 4:14 am, Grent <gre...@gmail.com> wrote:
>> 
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>>> On Nov 14, 1:07 am, "ict@ccess" <gids...@sasktel.net> wrote:
>> 
>>>> On Nov 13, 10:41 pm, oz390gta <oz390...@gmail.com> wrote:
>> 
>>>>> On Nov 14, 1:40 pm, Sheppy <the.she...@gmail.com> wrote:
>> 
>>>>>> On Nov 13, 9:01 pm, oz390gta <oz390...@gmail.com> wrote:
>> 
>>>>>>> My vanilla ROM01 IIgs has just started giving me a blue screen with
>>>>>>> the words "Unclaimed sound Interrupt" in flashing letters whenever it
>>>>>>> tries to boot from a mass storage device.
>> 
>>>>>> There are a few things I recommend trying here:
>> 
>>>>>> 1. Pull your memory card and use a pencil eraser to gently clean the
>>>>>> contacts on the card's connector. Then wipe it off with a clean cloth
>>>>>> and reinstall it.
>> 
>>>>>> 2. Give all the socketed chips on the motherboard a gental push to be
>>>>>> sure they're all well seated.
>> 
>>>>>> 3. Pull the keyboard off, see if starting without it connected works,
>>>>>> then reconnect it.
>> 
>>>>>> This problem can often happen because of bad RAM or bad contact with
>>>>>> the RAM card, or a poorly seated chip (especially the sound chip up
>>>>>> near the sound connector, but it's happened to me with others).
>> 
>>>>>> It can also happen when the ADB connection to the keyboard and/or
>>>>>> mouse is bad.
>> 
>>>>>> Sheppy
>> 
>>>>> OK, now it gets weird. I have used multiple keyboards, mice and ADB
>>>>> cables so they are not it. I have taken the memory card out so it is
>>>>> not that, checked for any loose chips.
>> 
>>>>>  It is still happening with the reproducible results below-
>> 
>>>>> Results with CFFA Card in any slot:
>>>>> -turn on power, boots fine, apple-ctrl-reset at any time after initial
>>>>> power up, crash with "Unclaimed Sound Interrupt" error.
>> 
>>>>> Results with Focus Card in any slot:
>>>>> -turn on power, freezes on initial "Apple IIgs" boot screen, apple-
>>>>> ctrl-esc (to get to control panel) results in crash with "Unclaimed
>>>>> Sound Interrupt" error.
>> 
>>>>> Both these a conditions are reproducible every time.
>> 
>>>>> Any other ideas?
>> 
>>>>> oz390gta
>> 
>>>> Unplug all cards and drives.  Start up the computer.  Hit Ctrl-Reset
>>>> to get to the applesoft prompt.  Now press apple-ctrl-esc to get to
>>>> the control panel.  If you can get this far without the error, then
>>>> the motherboard should??? be ok.
>> 
>>>> Does the error only happen when trying to boot from a CF card or
>>>> microdrive?  What about Prodos8 from a floppy and the card still
>>>> plugged in or unplugged?
>> 
>>>> What does the self test say?
>> 
>>>> Do you have a Hyper Studio microphone card that plugs into the row of
>>>> connectors just in front of the RAM slot?  Unplug and try again.
>> 
>>>> Also checking for loose chips is not the same as removing and re-
>>>> seating chips as they can still be corroded or oxidized and not have a
>>>> good connection.
>> 
>>>> Rob
>> 
>>> I am wondering if a weak power supply might be causing this?
>> 
>> It will boot from a Prodos 3.5 or 5.25 floppy but hangs with the
>> interrupt error if it is a GS/OS 6.01 boot floppy. I will try another
>> power supply also.
>> 
>> oz390gta
> 
> 
> I don't think it is the OS since you said in your first post that you
> took the CF card out of the slot card, which I took to mean that you
> did not boot into any operating systems.  And you gave it a PR#
> command which still produced a sound error.
> 
> Booting into GSOS from any drive, whether it be a floppy drive, cffa
> drive, or scsi hard drive would more than likely still cause a sound
> interrupt error since GSOS turns on interrupts.  After booting into
> Prodos 8, what is needed is a short program to turn on interrupts to
> see if the sound interrupt error still happens.
> 
> Rob

ProDOS runs with interrupts enabled. 

-michael - NadaNet 3.1 and AppleCrate II: http://home.comcast.net/~mjmahon