Ronald G Minnich <[EMAIL PROTECTED]> writes: > On 18 Oct 2001, Eric W. Biederman wrote: > > > And I can confirm that the ICH2 does not need any initialization. > > Did you get serial up? what's up with this thing?
Ron I have serial up on the i860 supermicro board. It has the same superio chip as the dual amd tyan board, I brought up earlier. But so far I am still in 16 bit real mode. All of the code in entry16.inc executes up to: jmp $0x10:$blah Where it switches to 32 bit protected mode. After that I can't get any output. This is something weird with the P4. Since I have the same southbridge as the i815EP chipset. The IO Controller Hub 2. I can say it doesn't need any special initialization. It does subtractive decode to the lpc bus by default. The i815 might need some initialization but truly doubt it. I haven't seen an x86 chipset that required any initialization of the northbridge before you write to the serial port. I do know the Pentium 4 does start with it's caches in a different mode but I think I have ruled that out as the problem. For porting to the 815ep gigabyte board it should be fairly straight forward to get the serial port up unless the dual bios logic kicks in. More on the P4 later. Eric
