outb_p
outb_p(inb_p(port) & ~bit, port);
outb_p(inb_p(port) | bit, port);
#define TLan_ClearBit( bit, port ) outb_p(inb_p(port) & ~bit, port)
#define TLan_SetBit( bit, port ) outb_p(inb_p(port) | bit, port)