I have difficulty cold-resetting Tyan s2912, which has mcp55. The sequence outb(0x2,0xcf9); outb(0x6,0xcf9); is a warm reset. It does not reset the HyperTransport link frequency and width. The sequence outb(0xa,0xcf9); outb(0xe,0xcf9); causes the CPU to hang but does not reset the MB. Does anybody know what is wrong? Thanks, Roman