Re: Confirmation of Focus drive problem and request for ROM 03 GS owners with RAM expanders

[Rubywand <rubywand@swbell.net>]

Rodney Hester writes ...
> 
 ....

> Turns out I have the *opposite* problem - the large file corruption
> problems, "ghosties" (weird video artifacts), random system crashes
> (especially when Balloon 2.0 was active), etc. _all_ went away when I
> removed SIMM 8.  (I had previously inadvertantly removed SIMM 2 - didn't
> look at the numbering system on the back of the Sirius.  D'oh!)
> This is, of course, with FocusDriver loaded and working.
>
> I guess the "older" Focus cards on ROM 03 systems dislike the "extra" RAM,
> and the newer ones require it?  *shrug*
 ....

     Maybe. Or, the particular Sirius release may be a factor. Do you know
what model your Sirius is? (By the way, what sort of information comes with a
Sirius card?)

     Other questions relate to Slot placement; And, since GS System is
usually involved, memory management problems could relate to assorted INITs
and patches.

     Meanwhile, the fact remains that accessing Expansion Memory beyond 4MB
on the IIgs requires implementing a hardware kludge. Apple specifies 4MB as
the maximum size for Expansion Memory-- i.e. as addressed by the Fast
Processor Interface)-- in both editions of the 'IIgs Hardware Reference'
(including the ROM 3 GS).

     Alltech seems to have never relased comprehensive, detailed information
about operation of the Sirius with more than 4MB installed. This leads to
problems.

     For example, your experience vis-a-vis the top 1MB seems to be directly
opposite that of another user. It would be nice to know when one should or
should not yank the top 1MB on an "8MB" card.



Rubywand