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VAX-11
architecture was designed to alleviate the
PDP-11's most severe limitation: an address space
that was too small for many applications. The
Virtual Address eXtension (VAX) increased the
address from 16 to 32 bits. The number of general
registers also doubled from 8 to 16. The
instruction set had both two and three operand
formats for many common operations with either a
register or memory operand allowable. |
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