Re: Rom 3 GS control panel

[oaaland@aol.com (O Aaland)]

>O Aaland <oaaland@aol.com> wrote:

>> I have run accross a Rom 3 GS that I was trying to set up for AppleTalk.
>> Whenever I try to reset the control panel for AppleTalk, its' settings
revert
>> back to what they were as soon as you press return. This is also true of the
>> clock settings. The clock is keeping time but the year is 1947. I remember
>> reading at one time about a jumper or something on a ROM 3 to keep anyone
from
>> resetting the control panel. Anyone remember anything about this?

>There is a jumper to the left and back a little from the memory
>expansion slot.  It is two pins with a molex connector arrangement, and
>is labelled "S1".

>If the pins are connected together, you can no longer access the Control
>Panel CDA.  It actually removes the Control Panel from the "Desk
>Accessories" menu.  It also prevents the Control-Option-Reset
>combination (it acts just like Control-Reset), so you cannot restore
>default settings either.  I don't think it affects access to the NDA
>Control Panels under GS/OS.

>In any case, this is not your problem.  Two possibilities that occur to
>me:

>1. The battery is flat.  The main symptom is that the Control Panel
>settings revert to the their default values every time you turn the
>computer on.  It is possible that a very flat battery is preventing the
>clock chip from working properly.

>2. There is a fault on the motherboard that is preventing the computer
>from writing to the parameter RAM (part of the clock chip), or there is
>a RAM fault on the motherboard.  I suggest running the self-test
>(Control-Apple-Option-Reset) and see if it reports anything.  Note that
>if you have a ZIP GS accelerator installed, you should disable it before
>running the test.

>I just tried various odd things like holding down modifier keys while
>pressing return, but can't duplicate your symptoms.

>-- 
>David Empson


The problem with the control panel settings is now repaired on this Rom 3
machine. I replaced the clock chip (343-0042-B) with one salvaged from a dead
Mac IICX and all the control panel settings can be changed and they now retain
their settings.

Owen Aaland