One i430TX board I have (Tyan S1571) had the DIP32's (Atmel AT29C010A) OE# in the normal place (ISA MEMR#), but the WE# at ISA SMEMW#. So you had to read from the high window, and write to the low. annoying to alter /dev/bios driver, so I removed the jumper and soldered WE# to ISA MEMW#.
Regards, Jeremy
----- Original Message ----- From: "Andrew Kohlsmith" akohlsmith-linuxbios@benshaw.com To: linuxbios@clustermatic.org Sent: Sunday, December 01, 2002 9:59 PM Subject: common flash hw write enable methods
After some head-scratching, I realize that the hardware RP# and VPP are
tied
together, and at a logic low, preventing any flash attempts. These are
pins
10 and 11 on the TSSOP part. :-(
Now I imagine that these are tied to a MOSFET to +12V which is run off of
a
GPIO pin. The question is, without tracing an 8-layer board out to try
and
identify how exactly reflash is enabled, how to reflash this?
I can always cut the traces and hard-wire to +12V but I'd like to see if I can't do this programmatically. I have a number of boards I want to use
and
hardware hacking is something I'd like to avoid doing if possible.
Now I know that every motherboard is different and that there may be other things locking me out, but generally speaking is there an "industry
standard"
way of enabling/disabling BIOS reflash? It's currently a PhoenixBIOS, so
I
imagine if I located a reflash tool and ran it in a Bochs session with a
lot
of I/O debugging I could figure out what it's doing but before I embark on that I'd like to see if anyone has any hints that may save me a lot of
time.