1. A computer system, comprising: a memory having a logical address space which can be mapped onto a virtual address space, which can in turn be mapped onto a physical address space; and a virtual machine interconnected to the memory and serving to (1) interpret a set of instructions defining the virtual machine, and (2) translate logical addresses to virtual addresses for application to said memory, and including means for generating said set of virtual machine defining instructions, including allocating blocks of logical address space, writing data into and reading from the allocated logical address space, for performing an "EQ" test for determining if two pointers within the logical address space refer to the same block of allocated logical address space, and copying contents of a first logical address to a second logical address within the allocated logical address space.