Changes
In the CPC the DS1 signal of the FDC is not connected, making it impossible to select floppy drives 2 and 3. The floppy drives 0 and 1 are selected instead.
== Notes Pin34 (Ready / Disc Changed) ==
The signal on pin34 differs between floppy drivesmodel. For 3inch drives, it is a "Ready" signal. The RDY signal is sent whenever a disk is installed and rotating at correct speed in the drive. For 3.5inch drives or Gotek, it is a "Disc Changed" signal.The DC signal determines whether the same disk loaded during the previous disk access is still in the drive. == Notes ==
Before accessing a disk you should issue a ''recalibrate'' command to the drive to move the head backwards until the ''track zero'' signal from the drive is sensed by the FDC. The FDC will also set its track counter for that drive to zero.
