Patent US 5,664,153

When writing a computer program which accesses a page of memory a programmer may know whether the next memory access is likely to be in the same page of memory. According to a preferred embodiment, program instructions indicate whether the next access is likely to be in the same page of memory. When these instructions are assembled, the assembler puts page control information in an unused high order address bit of the memory access. When the program is executed a memory controller in the system executing the program reads this page control bit and determines whether to close the page after access or leave it open for the next access bit.