> I'm not sure how exactly the ROMs are wired (they're usually 8-bit); > hopefully in a "natural" way. You can read most of ROMs under Linux via > mmap()ping /dev/mem -- parts of ROMs may not be directly available to the > host CPU if they contain option's CPU firmware. The MB ROM is remapped > (byte-merged) by the chipset so that it can be read in 32-bit quantities > as parts of it get executed directly (the I/O ASIC permits switching the > byte merging off). Option ROMs are not remapped as they always get copied > to the system RAM before execution. Their organization can be read from > their headers as specified by the TURBOchannel firmware specification. That sounds like an interesting alternative to pulling the PROM out of its socket. Then, a program running on a DECStation 5000/200 should be reading from 0x1F81C0000..0x1F1FFFFF, right? One question about Byte Merging: Does it mean that I don't have to read bytewise but instead DWORD-wise? Regards, Armin
