Adaptec ACB-2002A User manual
-.
@ adoptee,ine.
.,
ACB-2002A
User's
Manual
1.0
INTRODUCTION
1.1
SCOPE
AND
PURPOSE
OF
MANUAL
The
purpose
of
this
manual
is
to
guide
the
system
integrator
through
a
successful
installation
of
Adaptec's
ACB-2002A
board.
This
includes
both
hardware
and
software
installation,
as
well
as
troubleshooting
information.
1.2
REFERENCE
DOCUMENTS
* IBM
PC
or
XT
Guide
to
Operation
Manual
*
IBM
DOS
Reference
Manual
Version
2.0,
2.1,
or
3.0
*
Appropriate
Disk
Drive
OEM
Manual
1.3
OVERVIEW
OF
PRODUCT
The
Adaptec
ACB-2002A
is
a
high
performance
5
1/4"
and
3
1/2"
Winchester
Disk
Controller
for
the
IBM
PC
or
XT
and
equivalent
personal
computers.
The
ACB-2002A
is
an
extention
of
Adaptec's
ACB-2002
board.
The
ACB-2002A
has
Adaptec's
BIOS
installed,
while
the
ACB-2002
requires
the
system
integrator
to
supply
his
own
BIOS.
The
ACB-2002A
is
a
complete
"plug
and
play"
controller
board
and
requires
no
special
BIOS
or
software
driver.
The
Adaptec
ACB-2002A
is
one
of
the
highest
performance
controllers
available
today
for
the
IBM
PC/XT
compatible
marketplace.
In
addition,
it
is
fully
hardware,
software
and
format
compatible
with
the
IBM
XT
hard
disk
controller.
The
Adap
te
c
ACB-
20 0
2A
following
features:
Winchester
Disk
Controller
has
the
o
Fully
IBM
hardware
compatible.
It
plugs
directly
into
the
IBM
PC/XT
chassis
without
modification.
o
Fully
IBM
software
compatible.
It
operates
with
all
IBM
PC/XT
DOS
hard
disk
drivers
and
application
programs.
o
Fully
IBM
XT
disk
format
compatible.
You
can
interchange
drives
between
the
ACB-2002A
and
the
IBM
XT
controller
with-
out
reformatting.
400090-00A
1-1
----=---
-
--
----==-=-=-=------
-----=-------~=--
..
_--
o
Controls
both
5
1/4"
and
3
1/2"
ST-506
type
Winchester
disk
drives.
This
allows
the
system
integrator
to
interchange
drives
to
optimize
space
requirements.
o
On-board
primary
format
utility.
There
is
no
need
to
send
a
software
formatter
on
a
floppy
with
every
controller.
o
On-board
Adaptec
copyrighted
BIOS.
There
is
no
need
to
write
a
special
BIOS
or
software
driver.
o 2
to
1
interleaving
of
the
disk.
This
achieves
the
maximum
rate
of
OMA
transfers
that
the
IBM
PC
bus
can
accept.
Also
this
interleave
factor
can
be
varied
from
2
to
9.
o
User
defined
drive
parameters.
This
gives
you
the
ability
to
install
any
drive
onto
the
controller
without
BIOS
or
firm-
ware
changes,··
i.e.
device
independence.
This
gives
flexibility
in
the
choice
of
drives
and
ease
of
mixing
drives
in
manufacturing.
o
Auto-configuration
of
drive.
The
controller
writes
the
drive
parameters
onto
the
drive
during
format
and
reads
them
on
power-up.
This
allows
formatting
on
one
controller
and
no
need
to
reinitia1ize
on
another
ACB-2002A
controller.
This
is
ideal
for
field
upgrade
of
drives
with
no
user
intervention.
o
Four
standard
drive
tables
in
BIOS.
This
gives
the
option
of
using
jumpers
instead
of
user
defined
drive
parameters.
o
Support
of
2
ST506
type
drives.
The
drives
do
not
need
to
be
the
same
in
capacity
or
manufacturer.
This
allows
the
maximum
expansion
of
hard
disks
on
the
IBM
PC/XT.
o
Support
of
wedge
servo
drives
such
as
Quantum,
Syquest,
Microscience
International,
and
Tulin.
This
gives
you
drive
flexibility
and
no
need
to
order
special
controller
firmware.
o
13
microsecond
high
performance
seek
step
rate.
This
achieves
maximum
performance
of
the
drive
by
reducing
the
seek
access
time.
Many
drives
that
are
now
on
the
market
take
advantage
of
this
feature.
o
Power-on
diagnostics
and
self
diagnostics
for
controller
self
checking.
This
gives
a
high
confidence
level
that
the
controller
is
functioning
properly.
o
Seek
and
data
check
recovery.
This
reduces
the
probability
of
erroneous
data.
o
32-bit
Error
Correction
Code
(ECC)
on
both
10
and
data
fields.
This
corrects
up
to
11
bit
burst
errors,
and
guaran-
tees
data
integrity.
400090-00A
1-2
1.4
HARDWARE
AND
SOFTWARE
REQUIREMENTS
The
ACB-2002A
can
be
installed
in
any
IBM
PC/XT
or
equivalent
IBM
compatible
computer.
The
successful
installation
of
the
Adaptec
ACB-2002A
requires
the
following
hardware
and
software.
Hardware
1.
IBM
PC
or
XT
or
equivalent
IBM
compatible
computer
with:
a.
One 5
1/4"
floppy
diskette
drive
b.
One
available
system
expansion
slot
c.
Room
for
one
5
1/4"
or
3
1/2"
Winchester
(hard)
disk
drive
2.
5
1/4"
or
3
1/2"
Winchester
disk
drive(s)
having
the
industry
standard
ST506
interface
with
maximum
capacity
of
16
Mega-
bytes.
3.
External
power
supply
or
power
booster
to
support
the
power
required
by
the
Winchester
disk
drive.
If
using
an
IBM
XT
or
a
very
low
power
drive
in
the
IBM
PC,
this
is
not
required.
4.
20-pin
and
34-pin
flat
ribbon
cables
to
connect
the
drive
to
the
controller.
Software
1.
IBM
PC/XT
DOS
version
2.0
or
newer
revisions.
1.5
SPECIAL APPLICATIONS
FIRMWARE
APPLICATION
AT&T
6300
COMPAQ
DESKPRO
8
MHz
PCls
PC/IX
Operating
System
DMA
360
and
Syquest
312
drive
operation
16
MB
to
64
MB
using
1
or
2
physical
drives
400090-00A
1-3
COMMENTS
Requires
AT&T
motherboard
boot
ROM
revision
1.2
or
later
Requires
Adaptec
firmware
PIN
400110-00A
or
later
plus
BIOS
PiN
400051-00B
or
later
Same
as
Compaq
Deskpro
Requires
Adaptec
firmware
PIN
400110-00A
or
later
Requires
Adaptec
ACB-2010A
product
with
firmware
revision
400062-00B
or
later
Requires
Adaptec
ACB-2010A
using
logical
unit
partitioning
--
1.6
QUICK INSTALLATION
For
those
of
you
that
cannot
wait
to
use
your
ACB-2002A
controller,
the
following
steps
will
get
you
up
and
running.
This
installation
is
for
one
drive
of
capacity
up
to
16
MB
but
using
only
10
MB
(see
section
3.2
to
format
to
16
MB).
After
you
install
it,
please
read
the
complete
User's
Manual
so
you
can
use
ALL
of
the
capabilities
of
the
ACB-2002A.
STEP 1
Be
sure
that
you
have
all
the
required
hardware
and
software
as
detailed
in
section
1.4,
i.e.
an
IBM
PC/XT
,
DOS
2.0,
or
newer
revisions,
drive,
power
supply
and
cables.
STEP 2
Become
aquainted
with
the
ACB-2002A
board,
looking
at
the
location
of
jumpers
and.
connectors.
See
figure
2.1.
STEP
3
Configure
the
drive
to
be
"drive
0"
by
setting
the
switches
on
the
drive.
Be
sure
that
the
drive
is
terminated.
See
figure
2.2.
STEP 4
Configure
the
controller
so
it
matches
your
drive
as
follows:
DRIVE
VENDOR
AND
CAPACITY
Miniscribe
10
MB
Syquest
5
MB
Miniscribe
16MB
Seagate
10MB
Microscience
10
MB
ALL
OTHERS
INSTALL JUMPERS
M-N
and
O-P
M-N
and
E-F
O-P
none
E-F
A-B
See
section
2.5.2,
2.5.2.1
and
2.5.2.2.
STEP 5
Refer
to
figure
2.4.
Connect
the
drive
to
the
controller
using
your
34
pin
and
20
pin
cables.
Drive
0
uses
the
connectors
nearest
to
the
edge
of
the
board,
J0
and
J2.
See
section
2.5.3.
IMPORTANT:
BE
SURE THAT
PIN
1
OF
THE CONTROLLER GOES
TO
PIN
1
OF
THE
DRIVE.
WHEN
MOUNTING
IN
THE
PC,
PIN
1
IS
FACING
DOWN.
STEP 6
If
using
3
1/2"
or
5
1/4"
half
height
drives
no
extra
power
supply
is
needed.
If
using
a 5
1/4"
full
height
drive
in
a
IBM
PC
attach
an
additional
power
supply.
If
using
an
IBM
XT
no
additional
supply
is
needed.
See
section
2.5.4.
400090-00A
1-4
r
I
i
STEP 7
Mount
the
drive
and
controller
inside
the
pc.
Turn
power
ON.
IF
ANY
PROBLEMS
ARISE,
SEE
CHAPTER
4
TO
TROUBLESHOOT.
STEP 8
Boot
from
floppy
drive
A
using
the
Supplemental
DOS
diskette
that
contains
DEBUG.
See
Section
3.2.
TYPE
A>DEBUG
-G=C800:CCC
3
o
<CR>
<CR>
COMMENTS
<Carriage
return>
<Carriage
return>
(interleave
factor)
(drive
10)
N
3
<CR>
<CR>
<CR)
(or
'y'
if
you
are
using
one
of
the
drives
in
STEP
4)
(with
A-B
jumper
or
5
without
A-B
jumper
installed)
o
8
133
<CR>
133
<CR>
4
132
<CR>
<CR>
WAIT
until
press
CTRL
and
STEP 9
.(landing
zone,
not
used)
(ECC
correction
span)
(Write
pre-comp
not
used,
max.
cylinder+1)
(reduced
write
current,
not
used)
(head
count,
or
use
2 )
(number
of
cylinder,132
hex=306
decimal)
format
is
complete
BREAK
(SCROLL
LOCK)
keys
at
same
time
TURN
THE
SYSTEM
OFF. INSTALL
THE
DOS
SYSTEM
DISKETTE
WITH
"FDISK"
AND
"FORMAT" INTO DRIVE
"A".
THEN
TURN
THE SYSTEM
BACK
ON, THUS
COLD
BOOTING.
Type
FDISK
and
answer
questions,
then
run
FORMAT.
See
section
3.3.
400090-00A
1-5
2.0
HARDWARE
INSTALLATION
2.1
INTRODUCTION
This
section
describes
the
steps
necessary
to
install
the
ACB-
2002A
board
into
the
computer.
First
the
operating
enviroment,
unpacking
procedure,
and
board
layout
are
described.
This
section
also
describes
the
integration
of
the
drive
and
controller
into
the
computer.
2.2
ENVIRONMENT
REQUIREMENTS
The
ACB-2002A
will
perform
properly
over
the
following
range
of
conditions:
Temperature
F/C
Humidity
Altitude,
feet
MTBF,
Hours
2.3
UNPACKING
Operating
32/0
to
131/55
10%
to
95%
Sea
level
to
10,000
20,000
POH
@
55
C
Storage
-40/-40
to
167/75
10%
to
95%
Sea
level
to
20,000
The
carrier
is
responsible
for
damage
incurred
during
shipment.
In
case
of
damage,
have
the
carrier
note
the
damage
on
both
the
delivery
receipt
and
the
freight
bill,
then
notify
your
freight
company
representative
so
that
the
necessary
insurance
claims
can
be
inititated.
After
opening
the
shipping
container,
use
the
packing
slip
to
verify
receipt
of
the
individual
items
listed
on
the
slip.
Retain
the
shippibg
container
and
packing
material
for
possible
later
reuse
should
return
of
the
equipment
to
the
factory
be
necessary.
NOTE:
THE
ACB-2002A,
LIKE
ALL
ELECTRONIC EQUIPMENT
IS
STATIC
SENSITIVE.
PLEASE
TAKE
THE
PROPER PRECAUTIONS
WHEN
HANDLING
THE
BOARD.
KEEP
THE
BOARD
IN
ITS
CONDUCTIVE WRAPPING UNTIL
IT
IS
CONFIGURED
AND
READY
TO
BE
INSTALLED IN
YOUR
SYSTEM.
2.4
BOARD
LAYOUT
The
ACB-2002A
is
shown
in
Figure
2-1.
This
figure
shows
the
location
of
the
firmware,
BIOS,
jumpers
and
connectors.
Note
that
pin
1
of
the
connector
is
located
closest
to
the
PC
bus
edge
connector.
400090-00A
2-1
f
I
~
4!,HH!J90-00A
BIOS
o
LED
N P R T V X Z )
DRIVE
TABLE
• • • • •
••
SELECTION
AND
OPTION
• • • • •
••
JU~PERS
~OQSUWY
AIC-16000
AlC-300
~
AIC-5200 I
'--
__
A_IC_-_01_0_----'1
~
AlC-250
FIR~WARE
8085
8156
BDFHJL
••••••
• • • • • •
ACEG
I K
20
PIN
SOCKET
~
PIN
1
I
~""7':J1--'-"-''oi°1
34
PIN
SOCKET
PIN
1
PIN
1
I
J2
01 I
JO
01
)
HIGH
PERFOR~ANCE
JU~PERS
Figure
2-10
Board
Layout
2-2
2.5
INTEGRATION INTO
THE
SYSTEM
To
install
the
Adaptec
ACB-2002A
board
into
your
system
you
must
first
configure
the
drive(s),
set
the
controller
jumpers
and
connect
the
drive
cables
properly.
This
section
describes
all
the
necessary
steps
needed
to
successfully
install
this
hardware.
In
order
to
configure
the
drives,
you
need
the
Disk
Drive
OEM
Manual
that
was
supplied
with
your
drive.
(If
you
do
not
have
this
manual
call
your
Drive
vendor
for
assistance.)
This
manual
is
required
to
obtain
the
drive
characteristics
for
your
particular
drive.
The
controller
must
match
the
drive
parameters,
Le.
number
of
heads,
number
of
cylinders,
step
pulse
rate,
etc.
in
order
to
function
successfully.
The
drive
parameters
are
divided
into
two
categories;
one
being
the
drive
changeable
parameters
and
two,
the
controller
changeable
parameters.
2.5.1
DRIVE SELECTION
AND
TERMINATION
The
drive
changeable
parameters
are
the
drive
selection
switches
(or
jumpers)
and
the
drive
termination.
These
parameters
allow
a
drive
to
be
selected
as
drive
0,
1,
2
or
3.
This
is
accomplished
by
changing
the
drive
address
selection
switches
or
jumpers.
NOTE:
SOME
DRIVE
MANUFACTURERS
HAVE
DESIGNATED
THE
DRIVE ADDRESSES
TO
BE
1,2,3,4
INSTEAD
OF
0,1,2,3.
DO
NOT
SET
THE
DRIVE
AS
A RADIAL
SELECTED
DRIVE.
RADIAL
SELECTION
WILL SET ALL DRIVE OUTPUT
SIGNALS
TO
BE
ACTIVE,
EVEN
IF
THE DRIVE
IS
NOT
SELECTED.
IN
THIS
CASE,
THE
DRIVE
LED
WILL
BE
ON
AT
ALL
TIMES.
Use
the
two
lowest
drive
addresses
available
as
drive
"0"
and
drive
"1"
to
be
seen
by
the
controller.
Before
the
drives
can
be
cabled
to
the
controller
the
drive
cable
terminator
~ust
be
properly
set.
The
terminator
is
used
to
reduce
signal
"ringing"
in
the
cables.
The
terminator,
as
its
name
implies,
must
be
at
the
end
of
each
cable
in
order
to
have
the
controller
and
drive
communicate
properly.
The
controller
has
a
permanent
terminator
built-in.
The
disk
drives,
since
they
can
be
connected
in
a
daisy
chain
configuration
(see
Figure
2-3),
have
a
removable
terminator.
This
is
usually
a
16-pin
DIP
resis-
tor
package.
The
last
phys
ical
dr
i
ve
in
the
cha
i n
must
have
its
terminator
installed.
400090-00A
2-3
Exa!!!E~.!..:..
When
one
drive
and
one
controller
are
u~sed,
both
must
be
terminated.
CONTROLLER
TERMINATED
DRIVE
0
DRIVE
SELECTION
= 0
TERMINATOR
INSTALLED
Figure
2-2.
One
Drive,
One
Controller
Termination
Example
Example
2:
When
two
drives
and
one
controller
are
used,
only
the
last
one
in
the
chain
is
terminated.
CONTROLLER
TERMINATED
I
DRIVE
0
DRIVE
SELECTION
= 0
TERMINATOR
REMOVED
I
DRIVE
1
DRIVE
SELECTION
= 1
TERMINATOR
INSTALLED
Figure
2-3.
Two
Drive,
One
Controller
Termination
Example
Now
select
the
proper
drive
addresses
and
remove
or
install
the
required
terminators
for
your
system.
2.5.2
CONTROLLER JUMPER SELECTION
The
controller
changeable
parameters
are
defined
as
the
variables
that
can
be
changed
to
accommodate
the
different
drive
character-
istics.
These
parameters
can
easily
be
changed
by
jumper(s)
or
defined
by
the
user
(see
Chapter
3 )
for
the
drive
being
used.
The
parameters
shown
in
Table
2-1
need
to
be
taken
from
the
Disk
Drive
OEM
Manual
and
specifications.
Table
2-2
shows
the
drives
supported
by
the
BIOS
and
selected
by
the
jumpers.
If
the
drive
you
are
using
is
not
selected
by
jumpers
,
Table
2-1
must
be
completed.
Table
2-1
will
be
used
in
Section
3.2
when
the
user
defined
drive
parameters
are
discussed.
400090-00A
2-4
Table
2-1.
Drive
Table
Drive
Manufacturer
and
Model
.Unformatted
Drive
Capacity
Wedge
Servo
Format
used
(YIN)
Minimum
Step
Pulse
rate
for
buffered
Step
rate;
3
mSec
for
non-buffered
Write
Precompensation
starts
Reduced
Write
Current
starts
Number
of
Data
Heads
Number
of
Cylinders
Drive
0
Drive
1
MB
uSec
.
_____
cyl
inder
cylinder
----
heads
----
cylinders
These
parameters
make
up
what
is
called
a
drive
table.
2.5.2.1
DRIVE
TABLE
SELECTION JUMPERS
The
ACB-2002A
has
drive
tables
for
the
most
commonly
used
drives.
These
tables
reside
in
the
Adaptec
ACB-2002A
BIOS
EPROM.
See
Appendix
A
for
a
description
of
the
BIOS.
The
drive
tables
in
the
ACB-2002A
BIOS
support
the
following
drives:
10MB
half
height-Miniscribe
30l2H
or
equivalent,
5MB
Syquest
SQ-306
or
equivalent,
20MB-Miniscribe
4020H
or
equivalent,
10MB
full
height-Seagate
ST4l2
or
equivalent
(see
Table
2-2).
These
drive
tables
are
selected
by
jumpers
on
the
board.
Other
drives
can
be
attached
to
the
ACB-2002A
by
use
of
the
user
defin£?d
parameters
described
in
the
software
installation
section.
NOTE:
THE
ACB-2002A
IS
SHIPPED
ALREADY
CONFIGURED
TO
BE
USED WITH A
SEAGATE
ST4l2
OR
EQUIVALENT
10
MB
DRIVE. (SEE
TABLE
3
OF
TABLE
2-2.
)
400090-00A
2-5
Table
2-2.
ACB-2002A
Default
Drive
Tables
Drives
Supported
(or
equivalent)
Unformatted
Drive
Capacity
Wedge
Servo
Format
Step
Pulse
Code
(Rate)
Table
0
Miniscribe
30l2H
l2.75MB
no
5
(70
uSec)
Ship/Land
0
Zone
(+
cyl.
above
max
cylinder)
Write
Precomp
Cylinder
Reduced
Write
Current
Cyl.
Number
of
Data
Heads
Number
of
Cylinders
613
(not
used)
613
(not
used)
2
612
Table
1
Syquest
SQ-306
6.38MB
yes
5
(70
uSec)
307
(not
used)
307
(not
used)
2
306
Table
2
Miniscribe
4020H
20.0MB
no
5
(70
uSec)
128
481
(not
used)
4
480
Table
3
Seagate
ST4l2
(Microsci.,
Tandon,
Cogito,
IMI,CMI)
l2.l7MB
no
(yes
for
Microsci.)
5
(70
uSec)
128
307
(not
used)
4
306
If
needed,
see
Appendix
C
for
equivalent
hexidecimal
values.
These
four
tables
are
selected
by
jumpers
M-N,
o-p
for
drive
0
and
Q-R,
S-T
for
drive
1.
Table
2-3
defines
the
jumper
selection
of
each
drive
and
table.
400090-00A
2-6
Table
2-3.
Jumper
Selection
of
Drive
Tables
Table
for
Drive
0
Installed
Removed
0
M-N
and
o-p
1
M-N
O-P
2
O-P
M-N
3
M-N
and
O-P
Table
for
Drive
1
Installed
Removed
-0-
Q-R
and
S-T
1 Q-R
S-T
2
S-T
Q-R
3 Q-R
and
S-T
2.5.2.2
HIGH
PERFORMANCE
JUMPERS
The
ACB-2002A
also
has
jumpers
for
a
high
performance
step
rate
of
13
microseconds,
200
microseconds
step
rate,
or
3
milliseconds,
non-buffered
step
rate,
wedge
servo
drives,
1.0
microsecond
per
byte
DMA
speed,
and
self
diagnostics.
The
13
uSec
step
rate
is
selected
by
jumper
A-B
in
conjunction
with
a
seek
step
pulse
code
of
3
(see
software
installation
Section
3.2.2).
If
two
drives
are
used,
and
the
A-B
jumper
is
installed,
only
the
drive
that
uses
code
3
will
be
stepped
at
the
13
uSec
rate.
The
default
tables
use
seek
step
pulse
code
5,
or
70
microseconds.
Performance
of
drives
given
in
Table
2-2
can
be
improved
if
formatted
using
the
A-B
jumper
and
drive
parameters
inputted
as
noted
in
section
3.2.
A
200
uSec
step
rate
is
selected
by
jumper
A-B
in
conjunction
with
a
seek
step
pulse
rate
of
4.
A 3
mSec
step
rate
is
selected
by
jumper
A-B
in
conjunction
with
a
seek
step
pulse
code
of
0.
This
is
used
for
older,
non-
buffered
step
rate
drives.
The
wedge
servo
format
is
selected
by
jumper
E-F.
Drives
from
Microscience
International,
Quantum,
Syquest
and
Tulin
require
this
format.
If
two
physical
drives
are
used
and
one
of
them
requires
this
format,
this
jumper
must
be
installed.
The
second
non-wedge
servo
format
drive
will
not
be
affected
by
this
jumper.
The
controller
self
diagnostics
are
run
when
jumper
K-L
is
installed.
See
Chapter
4
for
the
description
of
the
self
diagnostics.
2-7
'e
Jumper
A-B
C-D
E-F
G-H
I-J
K-L
Table
2-4.
High
Performance
Jumpers
Installed
Removed
13
uSec
high
performance
step
rate
(when
used
with
step
code
3)
or
200
uSec
step
rate
(when
used
with
step
code
4)
or
3
mSec
step
rate
(when
used
with
step
code
0)
Not
used
Wedge
Servo
Drive
Not
Used
Not
used
Self-Diagnostics
70
uS
step
rate
(when
used
with
step
code
5)
or
3ms
step
rate
(when
used
with
step
code
3)
Non-Wedge
servo
.tt
2.5.3
DRIVE
AND
CONTROLLER CABLING
Now
that
the
drive
and
controller
are
configured,
they
can
be
connected
together.
The
controller
has
three
cable
connectors
J0,
Jl
and
J2.
Their
function,
suggested
connector
plug
and
maximum
cable
length
are
described
in
Table
2-5.
Connector
J0
Jl
J2
Connector
J0
Jl
400090-00A
Table
2-5.
Controller
Connector
Definitions
Signals
Data
Data
Control
Cable
20-pin
flat
ribbon
cable
Connected
to
drive
0
20-pin
flat
ribbon
cable
Connected
to
drive
1
34-pin
flat
ribbon
cable
Connected
to
both
drives
0
and
1
Recommended
Plug
Maximum
Length
3M
Part
#
3421
20
feet
(6
meters)
3M
Part
#
3421
20
feet
(6
meters)
2-8
•
The
connector
locations
and
pin
orientation
for
ACB-2002A
connectors
are
shown
in
Figure
2-1.
NOTE:
WHEN
MOUNTING
IN
THE
IBM
PC/XT,
PIN
1
OF
THE
CONNECTOR
AND
CABLE
. WILL
BE
FACING
DOWN.
THE
TWO
CONNECTORS
J0
AND
J2,
ALONG
THE
OUTSIDE
EDGE
OF
THE
BOARD,
ARE
USED
WHEN
ONLY
1 DRIVE
IS
PRESENT.
ALL
THREE CONNECTORS
J0,Jl
AND
J2
ARE
USED
WHEN
2 DRIVES
ARE
PRESENT.
REMEMBER
THAT
THE
LAST
PHYSICAL DRIVE IN
THE
CHAIN
MUST
HAVE
THE
TERMINATOR INSTALLED.
Connect
the
cables
as
shown
in
Figure
2-4.
2.5.4
DRIVE
POWER
REQUIREMENTS
The
IBM
PC
internal
power
supply
does
NOT
have
sufficient
current
to
power
most
hard
disk
drives
in
addition
to
its
present
load.
Either
an
external
power
supply
or
a
power
booster
may
be
required.
Many
3
1/2"
and
5
1/4"
half
height
drives
do
not
need
an
extra
power
supply.
The
IBM
XT
has
sufficient
power
and
no
extra
power
supply
is
needed.
If
needed,
install
and
test
the
supply
and
drive
separately
at
this
time.
NOTE:
BE SURE
TO
FOLLOW THE
DISK
DRIVE
OEM
MANUAL'S RECOMMENDATIONS
WHEN
GROUNDING
THE
DRIVE.
IF
PROPER GROUNDING
IS
NOT
FOLLOWED,
RANDOM
FORMAT,
WRITE
AND
READ
ERRORS
MAY
OCCUR.
Next
mount
the
ACB-2002A
controller
board
and
disk
drive
in
the
PC.
400090-00A
2-9
J1
20
PIN
SOCKET
/'--
PIN
1
J2
JO
34
PIN
SOCKET
20
PIN
SOCKET
DRIVE
0
DRIVE
1
Figure
2-4.
Controller
and
Drive
Cabling
400090-00A
2-10
r-------------------
D~A
IRQ
I/O
PORTS
BIOS
ADDRESS
•
HEX
•
DEBUS
S=CB88:CCC
3
5
32e
-
323
CSe00
-
C9HF
(51225)
Interleave
•••••••••.•.••
2
Drive
ID
...............
·I
Default
Para.eters••••••N
Step
Rate
•••••••.•••••••3
landing
Zone
............
1
Ecc
Correction
••••••••••8
IIrite
Preco.p
.........
12C
Reduced
IIrite••••••.••
2b8
Heads
••..•.••••.•••••••.4
Cy
1
inders
•••••••••••••
2b
7
o
LED
~
~
~
}
~
}
2002A
AlC-16000
AlC-300
AlC-010
FIRMWARE
8085
8156
~
BIOS
I
o -
11/
\AI
~
>
a:
"
o 0
Miniscribe
3012
Syquest
5Q306
Miniscribe
4e20
Seagate
51412
~
~ ~
!
~
~:
)
DRNE
TN3LE
• • • • •
••
SELEcnON
AND
OpnON
MO
S UW y
JUMPERS
~
AlC-5200 I
~
AlC-250 I
A- B
BDFHJL
·..... )
HIGH
PERFORMANCE
·.....
JUMPERS
ACEG
I K C- D
E- F
PIN
1 G- H
J1
'\
I - J
20
PIN
SOO<ET
~
34
PIN
SOCKET
PIN
1
PIN
1 ( - L
I
J2
'I
I
..KJ
j
V-2
CAP
CYLS
RDS
INSTALL
10MB
612
2
H-N
O-P
5MB
306
2
M-N
K-¥
16MB
480
4
O-P
10MB
306
4
MONE
INSTALLED
REMOVED
3:
13uS
31lS
4:
200us
o:
3.5
5:
70u5
Not
Used
Wedge
Servo
Not
Used
Not
Used
Self
Diags
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