RetroWiki

• mobo connector
  • is labeled CN303
  • there is a jumper J301 which when open is one drive (DF0:) and when closed is two drives (DF0: and DF1:)
  • some original cables will have mobo connector pin3 blocked out
  • some mobos will have mobo connector pin3 missing
• ribbon cable
  • default length is 22“
  • the 'middle' connector is for DF0:
    • it is 14” from the mobo connector
  • the last connector with the twist is for DF1:
    • it is 8“ from the DF0: connector
    • there is a twist at cable 4, 5, 6
• power
  • the yellow cable is 5v
  • the 'inner' two blue cables are GND
  • the red cable is 12v

Making Your Own Cables?

• new cables should be 24”
  • add an inch between mobo to DF0, now 15”
  • add an inch between DF0 to DF1, now 9”

• mobo connector
  • if the FDD connectors are pointing face up then this connector points face down
  • if looking at mobo connector face up with key on the left side, pin1 is at the bottom
• DF0:
  • this is the middle connector
  • if pin1 is at the top then key should be on the right side
• DF1:
  • this is the end connector
  • if pin1 is at the top then key should be on the right side
  • the twist, pull out wire 4-6 and reverse/rotate
  • the twist should be about 1” to give it some wiggle/stretch room