Shugart SA455 - 1.3.5 Recording Formats

1.3.5 Recording Formats
The formats of the data recorded on the diskette are totally a function of the host system. These formats can be
designed around the user's application to take maximum advantage of the total available bits that can be written
on
anyone track.
-
ACTIVITV
LIGHT
1-1-'-,-------.-----1
STEP
DIRECTION SELECT
INDEx/SECTOR 1-1-'-.- ... ------,------1
I.ED
STEPPER A
DRIVE SELECT (4 LINES)
...
CONTROL TRACK 00
LOGIC
INOEx/SECTOR
STepPER
MOTOR
TRACK 00
SWITCH·
STEPPER B
-
STEPPER C
STEPPER 0
-
1-t-1'RACK 00 (COM)
TRACK 00 (N/C) _
...
MOTOR ON
SIDE SELECT
READY
-
INDEx/SECTOR
DETECTOR
DRIVE
SELECT
SIDE
SELECT
DRIVE
MOTOR
REAO/WRITE
HEAD
ASSEMBL''(
I
WRITE WRll'E PROTECT (N/2)
PROTECT -'--1.. ..
SWITCH !-+w'RITE PROTECT
.... -----' (COM)
WRITE HEAD 0
WRITE HEAD l'
It •
WRITE
LOGIC
--
WRITE DATA
WRITE GATE
WRITE PROTECT
.
-
.J
~~
........
0%
:E8
ffi
tu
~
o
:t
~
....
READ HEAD 0
...... • __ R_EA_D_H_EA_D_1· __ , ., __ --t .......
SIDE
SELECT
If
READ
LOGIC
READ DATA
MOTOR
DRIVER
MC)TOR ON
....... ------
'SA465 ONLY.
FIGURE 1·2. SA455/465 FUNCTIONAL DIAGRAM
1·4
39238·02·/\