PCXHR_XLX_STATUS
reg = PCXHR_INPB(mgr, PCXHR_XLX_STATUS);
PCXHR_OUTPB(mgr, PCXHR_XLX_STATUS, reg); /* calculate freq */
PCXHR_OUTPB(mgr, PCXHR_XLX_STATUS, reg); /* save */
unsigned char reg = PCXHR_INPB(mgr, PCXHR_XLX_STATUS);