// headers for floppy driver
public extern Bool FDCIrq;
public extern U16 fdc_base;
public extern U0 CMOSGetFloppyDrives();
public extern U0 FDCSendCmd(U16 base, U8 cmd);
public extern U8 FDCReadData(U16 base);
public extern U0 FDCCheckInt(U16 base, U8 *st0, U8 *cyl);
public extern I16 fdc_mtr_ticks;
public extern U8 fdc_mtr_state;
public extern U0 FDCMotorOff(U16 base);
public extern U0 FDCMotorPwrOffTimer();
public extern U0 FDCMotorCtrl(U16 base, Bool onoff);
public extern I8 FDCRecalibrate(U16 base);
public extern I8 FDCReset(U16 base);
public extern I8 FDCSeek(U16 base, U8 cyli, U8 head);
public extern U0 FDCRead(U16 base, U8 cyl, U8 head, U8 sect, U8 trklen);
public extern U0 FDCReadMulti(U16 base, U8 cyl, U8 head, U8 sect, U8 trklen);
public extern U0 FDCWrite(U16 base, U8 cyl, U8 head, U8 sect, U8 trklen);
public extern U0 FDCWriteMulti(U16 base, U8 cyl, U8 head, U8 sect, U8 trklen);