*grumble* Repost CC to the list...
On Fri, Jun 12, 2009 at 00:21, Carl-Daniel Hailfingerc-d.hailfinger.devel.2006@gmx.net wrote:
Whoa. 4 M byte. Evil datasheet.
Yah
True. My idea in using ID2 was to make the old chip available a bit lower in the address space so flashrom could access it while the other chip is stacked on top.
Hmm, that's a good point, I didn't actually realise flashrom supported multiple chips on the one bus but it does make sense, that way he can reflash the old BIOS (assuming the chip isn't dead), restore the connection and all is good.
I'd still recommend replacing it with a socket though (less pain in the future). Or alternatively if he's feeling adventurous, make it permanent and fit a switch to tie one or the other high (they have internal pulldowns on the ID lines), lift "Write Enable" from the functional BIOS and you're guaranteed to always have a working BIOS available at the flick of a switch (I suppose you could call it a ghetto BIOS saviour) ;oD