ULTRASTOR ULTRA 12F24, Installation Manual

Page: 10 / 52

drive (Either 3.5" or 5.25").
7-8 IN: Floppy secondary port address is 370-377
OUT: Floppy primary port address is 3F0-3F7.
9-10 IN: Dual speed floppy drive support.
OUT: Single speed floppy drive.
11-12 IN: Precompensation is fixed at 125ns for all data rates.
OUT: Precompensation varies according to floppy
data rates; 250, 300, and 500KHz data rates have
250ns, 208ns, and 125ns precompensation each.
JP12 IN: Hard disk secondary I/O port address is 170-77
OUT: Hard disk primary I/O port address is 1F0-1F7
JP17 IN: Enable floppy controller.
OUT: Disable floppy controller.
JP20 1-2 IRQ15 select
2-3: IRQ14 select
3.3 Cable Connection And System Integration
After the controller and the drives are properly configured, connect all the necessary
cables according to the following steps with the system powered off:
a. Connect the drive power to the system power supply.
b. Connect the 34 pin daisy chained flat cable from the drive to J5 connector
on the controller. The twisted end of the cable is connected to the first
drive. Make sure pin 1 of the cable is connected to pin 1 of the drive and
controller connectors.
c. Connect the 20 pin flat ribbon cable from the first drive to the J4 connector
on the controller. Connect another 20 pin flat cable from the second drive
to J3 connector on the cable.
d. Connect the 34 pin daisy chained floppy flat cable to the J1 connector on
the controller. Connect the floppy drive power cable to the system power
supply.
e. Connect the drive activity LED cable from the system panel to the J6
connector on the controller board.
f. Remove the bracket from an empty expansion slot and use the bracket
screw in step g.
Page 8 Reference Manual