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You can attach up to two floppy disks to the SBC-410's on-board
controller. You can use any combination of 5.25" (360 KB and 1.2
MB) and/or 3.5" (720 KB, 1.44 MB, and 2.88 MB) drives.
The SBC-410 CPU card comes with a 34-pin daisy-chain drive
connector cable. On one end of the cable is a 34-pin flat-cable
connector. There are two sets of floppy disk drive connectors,
one in the middle, and one on the other end. Each set consists of a
34-pin flat-cable connector (usually used for 3.5" drives) and a
printed-circuit board connector (usually used for 5.25" drives).
1. Plug the 34-pin flat-cable connector into FDC CON on the
2. Attach the appropriate connector on the other end of the cable
The following table lists the pin assignments for FDC CON:
Pin
1~33(odd) GND
4, 6
10
14
18
22
26
30
34
22 SBC-410 User's Manual
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CPU card.
to the floppy drive(s). You can use only one connector in the
set. The set on the end (after the twist in the cable) connects
to the A: floppy. The set in the middle connects to the B:
floppy.
Signal
Unused
Motor enable A
Driver select A
Direction
Write data
Track 0
Read data
Disk change
Pin
Signal
2
High density
8
Index
12
Driver select B
16
Motor enable B
20
Step pulse
24
Write enable
28
Write protect
32
Select head
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