_reg_read_2
if (_reg_read_2(SH4_BCR2) & BCR2_PORTEN)
if (_reg_read_2(SH4_BCR2) & BCR2_PORTEN) {
_reg_write_4(SH4_PCIBCR2, _reg_read_2(SH4_BCR2));
_reg_write_4(SH4_PCIBCR3, _reg_read_2(SH4_BCR3));
dt->dt_year = FROMBCD(_reg_read_2(SH4_RYRCNT) & 0x00ff);
r = _reg_read_2(iprreg);