Secure computing device including virtual memory table look-aside buffer with non-relocatable page of memory

A secure computing system comprising:

• a memory storing data and/or instructions at corresponding addresses;
• an address generator for generating virtual addresses of a first predetermined number of bits for accessing data and/or instructions in said memory;
• a table look-aside buffer connected to said address generator having
• a fixed virtual address register of a second predetermined number of bits less than said first predetermined number of bits,
• a plurality of writable virtual address registers of said second predetermined number of bits,
• a first comparator connected to said address generator and said fixed virtual address register for comparing contents of said first fixed address register with said second predetermined number of bits of said virtual address and indicating a match,
• a plurality of second comparators, each connected to a corresponding virtual address register and said address generator, each for comparing contents of said corresponding virtual address register with said second predetermined number of bits of said virtual address and indicating a match,
• a fixed physical address register of said second predetermined number of bits,
• a plurality of writable physical address registers of said second predetermined number of bits,
• a multiplexer connected to said memory, said address generator, said first comparator, each of said second comparators, said fixed physical address register and each of said plurality of writable physical address registers, said multiplexer responsive to a match by one of said comparators to substitute contents of a physical register corresponding to said matching comparator for most significant bits of said virtual address and thereby form a physical address supplied to said memory for memory access.