After I reread your message, I figured that was what you were asking. But here's my question, I guess: what do you mean, "We can just wire the signals from the ISA bus." How can you just pick what signal wires you use? If the BIOS needs line x, you need to give it x! And if the BIOS signal wires are already using ISA bus signal lines, then why would you have had a question about how fast the CPU access the BIOS? In that case, the access speed to the BIOS would *have* to be ISA bus speeds!
Of course, my understanding is not relevant to the working of your circuit. If you don't feel like wasting your time on my understanding, I would understand. ;)
You can take a small ISA-prototype-card and a address-decoder (e.g. 74HC245). With these 2 things you can connect a flash/eprom/prom/whatever to a specific location in the system-memory (first 16meg, i think on isa-bus)
ciao, stephan
- To Unsubscribe: send mail to majordomo@freiburg.linux.de with "unsubscribe openbios" in the body of the message