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Unlimited PCI ROM scan memory for Servers Disclosure Number: IPCOM000021177D
Original Publication Date: 2003-Dec-31
Included in the Prior Art Database: 2003-Dec-31

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To facilitate the addition of new functions to a PC System a portion of the memory address space was set aside for add-in programs which were typically added by using a nonvolatile memory such as a ROM resident on an adapter card. A header was required in order to be recognized during a scan performed during Power On Self Test (POST). The header is located at the beginning of the allocation of memory used. Hence, the name for the process these add-in ROMs discovered during POST is ROM Scan and the allocation in the memory address space dedicated to add-in ROMs is referred to simply as ROM Scan area. The header is often referred to as the ROM Scan Header.