Patent ID: 7120772

Claim:
A micro-system for burning-in a system program from a plug-able subsystem into a main memory, comprising: a processor for sending out a first control signal and a second control signal; a main memory connected electrically with said processor for transferring data between said processor and said main memory; a device for adjusting to a first logic-level connected electrically with said processor for receiving said first control signal and connected electrically with said main memory for changing a logic-level of a third control signal to said first logic-level to enable said main memory; and a plug-able subsystem with a backup memory connected electrically with said processor for receiving said second control signal, wherein data are transferred between said backup memory and said processor when said second control signal is at said first logic-level, and said plug-able subsystem sends out a forth control signal to said main memory for changing said third control signal to a second logic-level to disable said main memory, and the data are not transferred between said backup memory and said processor when said second control signal is at said second logic-level, and said third control signal is at said first logic-level to enable said main memory for transferring data between said processor and said main memory.