ProBook 6470b

The HP ProBook 6470b models that I have encountered have used a MX25L6406E (64M-BIT [x 1 / x 2] CMOS SERIAL FLASH) BIOS chip. It is a SOIC8 package and the lower plastic chassis of the laptop must be removed to access it easily using the SOIC8 test clip

Connections for SOIC8

Bus Pirate<------------->MX25L6406E

  CS<-------------->CS#
MISO<-------------->SO/SIO1
 VCC<-------------->WP#
 GND<-------------->Vss(GND)
MOSI<-------------->SI/SIO1
 CLK<-------------->SCLK
 Vcc<-------------->HOLD#
 Vcc<-------------->Vcc