AT&T 3B2/300 Technical Reference Manual page 538

- - - - - - - - - - - - - - - - - - - - - - - - - - FUNCTIONAL DESCRIPTION
TO/FROM
CM190A/B
SYSTEM
BOARD
OR
CM195H
CARTRIDGE
TAPE
CONTROLLER
CARD
;'
'
READ DATA
-
READ
AMPLIFIER
INDEX MARK
DETECTION
AND
-
GENERATION
LOGIC
WRITE DATA
WRITE GATE
WRITE
WRITE PROTECT
-
LOGIC
-
't
'
STEP
DIRECTION
MOTOR ON
-
CONTROL
LOGIC
TRACK 0
H
INDEX
- READY
-
t
SIDE
DRIVE SELECT 0
SELECT
SIDE SELECT
LOGIC
-
INDEX
HOLE
SENSOR
........
HEADS
..
=±G
DRIVE
B
MOTOR
WRITE
PROTECT
SENSOR
ACCESS
I
INDICATOR
HEAD
-
POSITIONING
MOTOR
Figure 3-88: Floppy Disk Drive - Functional Block Diagram
FUNCTIONAL DESCRIPTION 3-285