Re: IIgs problem...

[labelas@hotmail.com (Labelas Enoreth)]

In article <1dpozut.1g5mur5hvtueN@dempson.actrix.gen.nz>,
dempson@actrix.gen.nz (David Empson) wrote:

> Labelas Enoreth <labelas@hotmail.com> wrote:
> 
> > Um, I'm not sure now if it posted correctly, did my message about the IIgs
> > crashing with a Fatal Error $0682 whenever I tried to access the control
> > panel, and Alternate Display mode (which seems to be missing)...and that
> > stuff won't boot?
> 
> The second most common cause is a faulty memory expansion card (or bad
> RAM on that card).  The event queue normally lives near the top of
> "fast" memory, so it is always located in the memory expansion card if
> you have one.
> 
> Similarly, the list of items in the Desk Accessories menu is in RAM, so
> lack of Alternate Display Mode points to memory corruption of some kind.
Hmm. Definitely thinking the card's screwy...I remember now my friend
saying that one of the cards was acting funny, but I had thought he meant
the GS-RAM...

> > Anyone have any ideas on this? the IIgs passes the self test...
> 
> The self test does not test the memory expansion card, only the
> motherboard memory, so my guess is that the card or its RAM is faulty.
> 
> I saw in the earlier article that you mentioned 41256-15 RAM from a IIe.
> In theory, this should be OK on a IIgs.  150 ns RAM is the slowest type
> that can be used in the IIgs, assuming the card is able to handle it.
> Many cards use 120 ns RAM (or faster) to improve the timings.
Wow. Now that I'm looking at the card, there's a couple -12 RAMs in there
too. They look identical to the -15s, except for the fact that they're
120ns obviously...I guess I didn't look very hard originally...I guess,
this could be causing a problem, no?
Serves me right for messing with it late at night I suppose...
If I dig up 2 more -15s, can I do the bottom in -12s? or should it all be
in -15? (I don't know if I have enough though)

> I doubt this is a problem here, as the Apple card appears to use 150 ns
> RAM normally.
> 
> Do you know if the RAM in question works OK?  Can you put it back in the
> IIe card and run its self-test?
Hmmm. Well, I think I'll try swapping around a little...and wait for your
response...