External Floppy Port (DB23 Female)


   Pin 1: *Disk Ready
   Pin 2: *Disk Read Data
   Pin 3: Ground
   Pin 4: Ground
   Pin 5: Ground
   Pin 6: Ground
   Pin 7: Ground
   Pin 8: *Disk Motor Control
   Pin 9: *Select Drive 3
  Pin 10: *Disk Reset
  Pin 11: *Disk Change (Latched Low)
  Pin 12: +5V (250 mA maximum.)
  Pin 13: *Select Disk Side (0=Upper, 1=Lower)
  Pin 14: *Write Protect
  Pin 15: *Track Zero
  Pin 16: *Disk Write Enable
  Pin 17: *Disk Write Data
  Pin 18: *Step (Pulse: Low, then high.)
  Pin 19: Direction (0=Inner, 1=Outer)
  Pin 20: Unused
  Pin 21: *Select Drive 2
  Pin 22: *Disk Index Pulse
  Pin 23: +12V (160 mA maximum, 540 mA surge.)


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