| 摘要 |
A virtual memory for a computer system is provided that is portable between different central processing unit (CPU) types. The system includes a high level virtual memory (HLVM) having high level program codes that are independent of a specific CPU type, a low memory vector table (LMVT) coupled to the HLVM that dispatches a call in response to a high level program code received from the HLVM, and a low level virtual memory (LLVM) coupled to the LMVT having low level program codes that depend on a specific CPU type. The method of operating the virtual memory system includes the steps of generating a high level virtual memory (HLVM) instruction from high level program codes that are independent of specific CPU characteristics and receiving the HLVM instruction in a low memory vector table (LMVT). The method further includes the steps of dispatching an address from the LMVT in response to the HLVM instruction, receiving the address from the LMVT in a low level virtual memory (LLVM), and executing CPU-specific instructions according to program codes in the LLVM corresponding to the address received from the LMVT. |
