264     out_8(&via[DIRB], (in_8(&via[DIRB]) | TACK | TIP) & ~TREQ);	/* TACK & TIP out */  in cuda_init_via()
265     out_8(&via[B], in_8(&via[B]) | TACK | TIP);			/* negate them */  in cuda_init_via()
266     out_8(&via[ACR] ,(in_8(&via[ACR]) & ~SR_CTRL) | SR_EXT);	/* SR data in */  in cuda_init_via()
267     (void)in_8(&via[SR]);						/* clear any left-over data */  in cuda_init_via()
270     (void)in_8(&via[IER]);  in cuda_init_via()
277     (void)in_8(&via[SR]);  in cuda_init_via()
281     out_8(&via[B], in_8(&via[B]) & ~TACK);  in cuda_init_via()
284     WAIT_FOR((in_8(&via[B]) & TREQ) == 0, "CUDA response to sync");  in cuda_init_via()
287     WAIT_FOR(in_8(&via[IFR]) & SR_INT, "CUDA response to sync (2)");  in cuda_init_via()
288     (void)in_8(&via[SR]);  in cuda_init_via()
292     out_8(&via[B], in_8(&via[B]) | TACK);  in cuda_init_via()
295     WAIT_FOR(in_8(&via[B]) & TREQ, "CUDA response to sync (3)");  in cuda_init_via()
296     WAIT_FOR(in_8(&via[IFR]) & SR_INT, "CUDA response to sync (4)");  in cuda_init_via()
297     (void)in_8(&via[SR]);  in cuda_init_via()
299     out_8(&via[B], in_8(&via[B]) | TIP);	/* should be unnecessary */  in cuda_init_via()
423     if ((in_8(&via[B]) & TREQ) == 0)  in cuda_start()
427     out_8(&via[ACR], in_8(&via[ACR]) | SR_OUT);  in cuda_start()
429     out_8(&via[B], in_8(&via[B]) & ~TIP);  in cuda_start()
468         if ((in_8(&via[IFR]) & SR_INT) == 0) {  in cuda_interrupt()
476     status = (~in_8(&via[B]) & (TIP|TREQ)) | (in_8(&via[ACR]) & SR_OUT);  in cuda_interrupt()
483 	(void)in_8(&via[SR]);  in cuda_interrupt()
484 	out_8(&via[B], in_8(&via[B]) & ~TIP);  in cuda_interrupt()
494 	(void)in_8(&via[SR]);  in cuda_interrupt()
495 	out_8(&via[B], in_8(&via[B]) & ~TIP);  in cuda_interrupt()
504 	    out_8(&via[ACR], in_8(&via[ACR]) & ~SR_OUT);  in cuda_interrupt()
505 	    (void)in_8(&via[SR]);  in cuda_interrupt()
506 	    out_8(&via[B], in_8(&via[B]) | TIP | TACK);  in cuda_interrupt()
513 	    out_8(&via[B], in_8(&via[B]) ^ TACK);  in cuda_interrupt()
522 	    out_8(&via[ACR], in_8(&via[ACR]) & ~SR_OUT);  in cuda_interrupt()
523 	    (void)in_8(&via[SR]);  in cuda_interrupt()
524 	    out_8(&via[B], in_8(&via[B]) | TACK | TIP);  in cuda_interrupt()
537 	    out_8(&via[B], in_8(&via[B]) ^ TACK);  in cuda_interrupt()
542 	*reply_ptr++ = in_8(&via[SR]);  in cuda_interrupt()
545 	    out_8(&via[B], in_8(&via[B]) | TACK | TIP);  in cuda_interrupt()
551 	    out_8(&via[B], in_8(&via[B]) ^ TACK);  in cuda_interrupt()
556 	(void)in_8(&via[SR]);  in cuda_interrupt()
585 	    out_8(&via[B], in_8(&via[B]) & ~TIP);  in cuda_interrupt()