Deign method of communication of BIOS measurement board card and host

摘要: The invention provides a design method of communication BIOS measurement board card and host, relates to the field computer communications. IO signals, MOSI, CS, CLK MISO, Flash chip storing program are connected BUS switch card, signal output by bus is CPU, outputs control S_EN which CPU. When system powered on, controls be in disconnected state through signal, with BIOS, code FLASH read, measured, whether legal or not judged, after passes measurement, output, turned meanwhile host informed load signal. Complex sequential avoided, valuable interface resources saved.