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2.6.1 Environment Variables for the Microcode

These environment variables are referred to by the microcode: the executable C program called mit-scheme-ARCH-VERSION. The values they specify are overridden by the corresponding command-line options, if given.

MITSCHEME_BAND ¶

The initial band to be loaded. The default value is all.com.

MITSCHEME_LIBRARY_PATH ¶

A list of directories. These directories are searched, left to right, to find bands and various other files. On unix systems the list is colon-separated, with the default /usr/local/lib/mit-scheme-ARCH-VERSION.

MITSCHEME_CONSTANT ¶

The size of constant space, in 1024-word blocks; overridden by --constant. The default value is computed to be the correct size for the band being loaded.

MITSCHEME_HEAP_SIZE ¶

The size of the heap, in 1024-word blocks; overridden by --heap. The default value depends on the architecture: for 32-bit machines the default is ‘3072’, and for 64-bit machines the default is ‘16384’.

MITSCHEME_STACK_SIZE ¶

The size of the stack, in 1024-word blocks; overridden by --stack. The default value is ‘1024’.