2.6.1 Environment Variables for the Microcode

These environment variables are referred to by the microcode (the executable C program called mit-scheme under unix, and mit-scheme.exe on the PC).

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. On PC systems the list is semicolon-separated with the default c:\local\mit-scheme.

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 ‘4096’, 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 ‘128’.