So I've got linuxbios booting inside Bochs and I feel I'm confident enough to
roll the dice and burn it to a real board (TSSOP package, no sockets) using
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.