#define IN(x)		inb(csdev.port+(x))#define OUT(x,v)	outb(csdev.port+(x),(v)) voidcs4231install(void){	KMap *k;	static int installed=0; 	if(installed)		return; 	k = kmappa(AUDIO_PHYS_PAGE, PTEIO|PTENOCACHE); 	csdev.port = VA(k)+AUDIO_INDEX_OFFSET;	dmasize(Wdma, 8);	dmasize(Rdma, 8); 	installed=1;}