Unclaimed Sound Interrupt?

oz390gta

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Nov 13, 2011, 9:01:05 PM11/13/11

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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. The GS/OS splash screen
comes up for half a second then the interrupt error. I get the same
error from a CFFA and Focus card no matter what slot I put them in and
I have also tried multiple CF cards. Different memory cards dont seem
to matter either. It will even do it I take the CF card out of the
card and give it the PR#x command. I have also noticed the same error
intermittently when I try to open the control panel from ProDos if
there is a mass storage card in a slot.

I am at the end of my tether trying to figure this one out. Any ideas?

oz390gta

Sheppy

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Nov 13, 2011, 9:40:26 PM11/13/11

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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

oz390gta

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Nov 13, 2011, 11:41:05 PM11/13/11

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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

ict@ccess

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Nov 14, 2011, 1:07:53 AM11/14/11

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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

Grent

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Nov 14, 2011, 12:14:09 PM11/14/11

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I am wondering if a weak power supply might be causing this?

oz390gta

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Nov 16, 2011, 1:18:39 AM11/16/11

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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

oz390gta

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Nov 16, 2011, 1:30:02 AM11/16/11

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Same results with numerous power supplies.

oz390gta

Bill Garber

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Nov 16, 2011, 3:01:11 AM11/16/11

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"oz390gta" <oz39...@gmail.com> wrote in message news:2d2912a9-25b3-47b6...@i4g2000prd.googlegroups.com...

08FF "UNCLAIMED SOUND INTERRUPT"-- A sound interrupt has occurred
but none of the available interrupt handlers were willing to deal
with it. The Sound tool set thinks this is pretty serious; so, it
notifies the System Failure Manager and you get the error message.
A possible cause is that the table of interrupt vectors or the
pointer to the table has been messed up in memory.

ict@ccess

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Nov 16, 2011, 9:41:14 PM11/16/11

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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

Michael J. Mahon

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Nov 17, 2011, 11:27:33 AM11/17/11

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ProDOS runs with interrupts enabled.

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