It makes sense that one would be able to use 16mb simms across the board in
all 8 slots as the max RAM that the IIcx can address is 128Mb.  to get that
max, you'd HAVE to use all 16mb Simms.

In any case, are all the 16Mb SIMMs the same speed?  And, are they all FPM?
Hopefully you didn't get any EDO simms as I have had some sellers pull that
on me after specifically asking for 80ns FPM Simms.

The IIcx should be wanting 120ns or faster FPM SIMMs.
Mode 32 is all that you should need to address more than 8mb though.  What
system are you booting MacSide though?  7.0-7.5.5?

I've got a MacIIci that has no trouble reading all 8 slots with 4mb simms
in MacOS 7.5.3, however, have not had my hands on any 30pin 16's yet.

Not sure if any of this is a big help, but, hey, maybe it'll get ya in the
right direction.

-Jim



>Hello,
>
>For those of you with Mac IIcx's, what memory configurations are you
>using?  Has anyone successfully used 16MB SIMMS in a IIcx?  How about 4MB
>SIMMS?
>
>I purchased a set of 4 16MB SIMMS from memoryx.net, but I'm having a bit
>of trouble installing them.
>
>When the 16MB SIMMS are installed in bank A, the IIcx plays the "death
>chimes" and refuses to start up (regardless of what is in bank B).
>
>When 1MB SIMMS are in bank A and 16MB SIMMS are in bank B, the system
>boots but only sees 8MB of RAM (I am running MODE32 and 32-bit addressing
>is enabled).
>
>Any ideas?  (Of course this is for the purpose of running NetBSD; I am
>asking here rather than on a general Mac users list because I figure
>NetBSD users have more incentive to upgrade past 8MB to build kernels).
>--
>Tod McQuillin