INTENB2
intenb2 = r8a66597_read(r8a66597, INTENB2);
r8a66597_bclr(r8a66597, ATTCHE, INTENB2);
r8a66597_bclr(r8a66597, DTCHE, INTENB2);
r8a66597_bclr(r8a66597, BCHGE, INTENB2);
return port == 0 ? INTENB1 : INTENB2;