Service manual

4-
2
1L- DOUBLE"DENSITY DISK CONTROLLER
TO REARRANGE THE DRIVE NUMBERS...
Refer to the following chart and Figure 4-1, and select the configuration that fits your
situation. Configuration E is normally used for transferring data
and programs from
hard-sectored disks to soft-sectored disks.
After you select the configuration you want, refer to Figure
4-2 on Page 4-3 to program
any
48 TPI (H-17-1) drives, or Figure 4-3 on Page 4-4 to program any 96 TPI drives.
[Figure
4-4 on Page 4-5 shows single-sided drives (H-17-1) programmed for connection
to
an H-88-1 Controller.] You can do this programming by physically interchanging
preprogrammed drives, interchanging the programming modules, cutting
the pro-
gramming modules (if presently uncut); or
by replacing the programming module with a
properly set dip switch.
DRIVE
f(1
DRIVE DRIVE
IE:J~\
1 2
~
1m
w
u
Figure 4-1
TYPES OF DRIVES:
FLOPPY DISK • 48 TPI (H-17-1)
CONTROLLER BOARD(S) • 96 TPI (H-17-4)
Drive 0 Drive 1
Drive 2
A
H-88-1 48 TPI (H-17-1) only.
DS3 DS2
DS1
Internal drive present
B H-88-1
48 TPI (H-17-1)
No drive installed DS3 DS2
Internal drive absent
C Z-89-37
Either
*
DS1 (Z-89-37 DS2 DS3
Internal drive present jumper installed at J4)
D Z-89-37
Either
*
No drive installed DS1 DS2
Internal drive absent (Z-89-37 jumper installed
at J7)
E H-88-1
& Z-89-37
Either
*
DS3 [Drive 0 is DS1 (Drive 0 connected DS2 (Drive connected
Internal drive present 48 TPI (H-17-1) to Z-89-37)
Z-89-37)
drive connected to
H-88-1. Z-89-37
jumper installed at J6.]
* All drives connected to the Z-89-37 should be of the same type, either 48 TPI (H-17-1) or 96 TPI (H-17-4).