DOUBLE-DENSITY
DISK
CONTROLLER
1
4
..
3
HARDWARE
UNIT
ZERO (DS1)
HARDWARE
UNIT
ONE (DS2)
HARDWARE
UNIT
TWO (DS3)
I
[::J
~
.
I I
I:
~n
:22,
.,..,
..
.,
....
..,.,
J
CUT
I I
...,
7
....
....
-,-.
Figure 4-2
Single-sided drives
(H-17-i)
programmed for
2-89-37 Controller.
