MCL 4.0 Memory Requirements

The memory required to run MCL 4.0 will vary, depending on whether or not virtual memory is enabled. If virtual memory is enabled, it will run in a somewhat smaller memory partition.

With virtual memory enabled, MCL 4.0 will run in a minimal partition of 2.7 mb and be comfortable in a 4.8 mb partition. With virtual memory disabled, MCL 4.0 will run in a minimal partition of 3 mb and will run comfortably in a 5.1 mb partition. With virtual memory disabled, another 3.5 megabytes of MultiFinder memory must be available after MCL has been launched.

The reason for this difference is that the Mac OS "file-maps" static code and data when virtual memory is enabled. The number of bytes in this static code and data is effectively added on to the requested partition size. File-mapping will also be applied to programmer code and data in applications and Lisp environments created with save-application.

In System 7.5.3 with virtual memory enabled, the size requirements reported by the Finder are the amounts given in the size resource. With virtual memory disabled, the requirements reported by the Finder are the sum of the amounts given in the size resource, plus the size of static code and data.

The MCL 4.0 size resource is set for a generous partition showing approximately 4.8 mb with virtual memory and 5.1 mb without.

Important: In starting up MCL 4.0, the Macintosh OS loads the MCL's shared libraries. If virtual memory is not turned on, these shared libraries require approximately 3.5 megabytes of free space in the Process Manager (Multifinder) zone. This is space that has not already been allocated to MCL. For this reason, when running without virtual memory you should not set MCL's partition size to take up all the remaining memory on your Macintosh. You should set its partition size such that at least 3.5 megabytes will be left free. If there is not enough memory for MCL 4.0 to load its libraries, MCL will display a dialog informing you of this. This also holds for the "Demo Version" of MCL 4.0, with the built-in libraries.

Gettmg Started with MCL - 19 OCT 1996

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