Re: Audio Noise Problems (IIgs ROM 01)

["Greg Andrzejewski" <pressyourluck85@yahoo.com>]

"Tempest" <tempest@atariprotos.com> wrote in message 
1159542088.760359.229730@e3g2000cwe.googlegroups.com">news:1159542088.760359.229730@e3g2000cwe.googlegroups.com...
> Yesterday while using my IIgs I noticed a strange noise coming out my
> speakers.  It seems that whenever I was in System 6 there was a quiet
> poping noise coming out the speakers.  The pops were about a second
> apart and it was constant. Opening menus or moving the mouse around
> didn't seem to change anything.  I don't recall ever having this
> problem before, so I'm wondering if something I've setup recently could
> cause this.  The problem doesn't happen during games, so I think it
> must have something to do with System 6.

My Woz IIgs does the exact same thing. If you have a 5.25" drive hooked up 
to the smartport, you will see the LED blink ever so slightly in time with 
the pops. This would lead me to believe that the noise has something to do 
with GS/OS constantly polling the drives. From what I understand, it's a 
flaw with some ROM00/01 machines. It's never bothered me enough to really do 
anything about it. Of course, it's probably much easier to live with from 
the internal speaker than from external ones.

A quick solution would be to obtain a stereo card and plug the speakers into 
that. This is the setup I have. Then you can disconnect the internal, if you 
want, or plug something into the headphone jack to disable it.

-Greg
>
> I've got a IIgs (ROM 1), system saver, monitor all stacked on each
> other (in the standard way).  Next to the IIgs I have a HD with a CD
> stacked on it, with two 3.5" floppies stacked on those. On top of those
> floppies is a speaker, with the other speaker being on the desk on the
> other side of the IIgs.  Inside the IIgs I have an Ethernet card, SCSI
> card, 4 MB memory card in the aux slot.
>
> At first I thought that the speakers might be causing the issue, but I
> moved them far away from the IIgs and still heard the sound.  I had the
> 3.5" drives and HD/CD drives next to the IIgs before and never had this
> issue, so I'm at a loss on what it could be.  Perhaps the speakers are
> picking up some kind of interference from the HD reads?  I don't know
> if the pops come out the internal speaker when I unplug the powered
> speakers, if it does it's too quiet to hear.
>
> Another theory I had is that this is the dreaded ROM 01 noise issue.
> I'm going to try and hook up my ROM 03 tonight and see if the problem
> is still there, but I thought that when this was the problem moving the
> mouse around and selecting menu items made it worse.  I don't get this
> with my problem.
>
> Anyone have a similar issue or have any ideas on what it could be?
>