System 7.5 RAM troubles - gah!

[commodorejohn]

Well, I recently came into possession of a nice little Mac IIsi. It's in nice shape and runs fine, and some previous owner put a whole 16MB of RAM in it (plus the 1MB on the motherboard,) so I should be comfortably set for some 68k goodness :approve:

...or so I thought. I got System 7.5 installed from the disks that came with it and got some software copied over. Problem is, System 7 is taking an absolutely ungodly amount of RAM, leaving about 6.5MB of the 17MB free for applications. I spent a while disabling unnecessary features and extensions and got it down to a much more reasonable 2MB. Problem solved, right?

Wrong :-/ For some reason, the changes didn't stick, and it's back to loading every damn thing into memory. I tried disabling things in the Extension Manager, tried moving them to a separate folder, no luck. I don't want to just delete them because most of them are things I might want later on (networking and CD drivers, for instance,) but 10+ MB of RAM chewed up by the OS just isn't acceptable.

The PRAM battery is either dead or dying; I'm not sure how or if this would factor into it, but maybe? I don't know. Can anyone help me figure out how to address this?

 

[Paralel]

Install and run Mode32. This is what happens when you try to use a larger amount of ram in a 68k system without either 1) A 32-bit clean ROM 2) Mode32 running on a 32-bit unclean ROM.

 

[Anonymous Freak]

The IIsi has a 32-bit clean ROM. Mode32 not necessary.

But you do want to go into the Memory Control Panel and make sure 32-bit addressing is on!

 

[commodorejohn]

Hmm, wow. I did turn on 32-bit mode during the initial cleanup, but I guess the PRAM battery failure kept it from sticking. Well, all the more reason to hurry up and get a new one. Thanks for the help!