Re: mcl virtual memory question

[reti@cambridge.apple.com (Kalman Reti)]

At  9:52 AM 2/23/94 -0500, Philip Jackson wrote:
>Help, please!
>
>I'd appreciate any help you can give me with getting  virtual memory to
>work with Mac Commonlisp. Here's the configuration I have:
>
>latest version of Mac Commonlisp, received from APDA on 2/21/94
>Mac OS 7.1
>Mac IIci with 32 MB RAM, 1GB disk
>DiiMoCache 50Mhz 48030 w/ FPU, 64 KB cache, accelerator card in cache slot
>
>When I partition MCL to have 20 MB and don't use virtual memory, MCL starts 
>and runs fine.
>
>Sometimes when I ask for 64MB virtual memory and partition MCL to have 50 MB,
>MCL starts and probably runs fine. Other times MCL won't start -- when trying
>to start MCL it bombs giving a "system error 7", and my only option is to
>restart the machine -- 

To debug this, we need more information; I'm attaching a copy of Macsbug.  Put it
in your system folder and then, when the bug happens, type

   log MCLcrash
   how
   td
   ip
   sc7
   log

and send me the contents of the file MCLcrash.

>
>Whenever I ask for more than 64MB virtual memory, MCL bombs with system
>error 7, independently of how much I partition it with....
>
>The problem seems to be with the "Ptable" file of MCL. Whenever MCL runs fine,
>the Ptable icon is displayed fine when I start the machine. Whenever MCL 
>bombs out, the Ptable icon is X-ed out when I start the machine. Of course,
>I start the machine whenever I change my virtual memory allocation.

There is something not quite right here; Ptable should be Xed out always when
you have virtual memory turned on.  (It does some hardware setup only required
if you have an MMU and are not running virtual memory; when VM is on, it does
the hardware setup for you.)

>
>The MCL documentation says there is a patch for IIci's that have 68040 
>accelerator cards but I haven't tried that yet, since I have a 68030 card..
>(oops, please excuse typo above).

If you are running the newest MCL (which is 2.0.1), I believe that patch is included.

>
>For what I'm trying to do, I'd like to have 100MB or more virtual memory,
>and of course I'd like everything to run repeatably. At present, I can only
>get 64MB virtual memory, and even that doesn't always work -- quite often
>the Ptable icon is X-ed out when I start the machine and ask for 64MB 
>memory...
>
>Thanks in advance for your help--
>
>Phil Jackson
>
>810-947-1147