Additional bios chip via spi?

Discussion in 'BIOS Mods' started by KOLANICH, Jun 16, 2014.

  1. KOLANICH

    KOLANICH MDL Novice

    Jul 5, 2013
    22
    0
    0
    Is it possible to add an additional bios chip on mb using spi connector on it? I wanna start the system from it while i am experimenting, leaving the firmware in chip on mb unmodified. If it is possible, is it possible to use larger bios chip than the one which mb has?
     
  2. gabiz_ro

    gabiz_ro MDL Member

    Feb 2, 2010
    170
    12
    10
    You may disconnect CS (Chip Select) pin from board.
    Connect additional chip to onboard one, pin to pin,except off course CS pin.
    Use switch to decide which CS pin to connect to motherboard.
     
  3. KOLANICH

    KOLANICH MDL Novice

    Jul 5, 2013
    22
    0
    0
    #3 KOLANICH, Jun 18, 2014
    Last edited: Jun 18, 2014
    (OP)
    Is it possible to implement this without resoldering my mb, but using hold (pulling it down) and enabling both chips? Hold will disable the chip on mb so it won't prevent usage of the chip on pcb connected to spi connector.

    Also, can i use another flash by another vendor (atmel instead of spansion) of larger size? Now i have 1 mb chip, but 1 mb is a very little amount. But I know that bios is unable to use more than 1 mb. How will it behave if i connect 64mb flash?
    Will i be able then download the data out of mapped 1mb from flash?