A2000 FDD
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