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Hello,

> > Hmm, write a small program that enables the ROM ( or do it by hand - pcictl
> > and tweakpci are your friends ), mmap(/dev/mem, whatever_physical_address_it_is_at)
> > and dump it into a file. The PCI stuff is at 0x1ff00000000, so it should be
> > fairly easy to do. Of course this works only if the ROM is really one piece of 128KB.
> > I did something similar on macppc, I could send you the code if you want.
> 
> I would appreciate that. I'm pretty sure I understand what you're suggesting
> - but I've never tried to do anything similar before, so an example would be
> most welcome.

Ok, this little thingie dumps the ROM of an PCI devices - adapting it to sparc64 should be trivial.
The crucial parts are these:
        if(mem=open("/dev/mem",O_RDONLY))
        {
                rom=mmap(NULL,0x10000,PROT_READ,MAP_SHARED,mem,rom_base);
                if(verbose)
                        fprintf(stderr,"rommap: %08x\n",rom);
                if(rom!=(void *)0xffffffff)
                {
                        fwrite(rom,0x10000,1,output);
                }
                munmap(rom,0x10000);

You'll want to change that to 0x20000 to dump 128KB, and to add 0x1ff00000000 to rom_base - the program is intended for macppc where PCI addresses are equivalent to physical memory addresses, that's not the case on Suns. Make sure the ROM is mapped to something useful, eg. not NULL. The base address is in the PCI BAR at 0x30 - pcictl should tell you where it's mapped, pcitweak allows you to change the BARs ( I'll send you the binary if you don't have it - it should come with XFree86 though ). The lowest bit in the BAR controls if the ROM is enabled, the program can set it for you, just make sure it contains some sort of address. In doubt check what's in use and pick something safe by hand, luckily you don't have to worry about collisions too much :)

have fun
Michael

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