mgx_read_1
uint8_t mgx_read_1(vaddr_t, uint);
mode = mgx_read_1(sc->sc_xreg, ATR_DPMS);
mode = mgx_read_1(sc->sc_vidc, TS_DATA);
stat = mgx_read_1(sc->sc_xreg, ATR_BLT_STATUS);
stat = (mgx_read_1(sc->sc_xreg, ATR_FIFO_STATUS) & FIFO_MASK) >>