System for relocating dynamic memory address space having received microprocessor program steps from non-volatile memory to address space of non-volatile memory

摘要

A personal computer transfers the contents of the computer's slow 16 bit read only memory (ROM) into the computer's fast 32 bit random access memory (RAM), remaps the RAM space to include the ROM space and disables the ROM. Portions of the RAM are tested before the contents are transferred. After the transfer the computer operates out of the RAM. Additionally, the RAM address space containing the ROM contents can selectively be made write protected so that the data cannot be changed.