Adaptec Acb-2070a User manual

@ adaptec, inc.

ACB-2070A

Installation

Guide

PC'S

AND

DRIVES

SUPPORTED

BY

THE

ACB·2070A

The

Adaptec

ACB-2070A controller

board

has

been

successfully tested

in

the following personal computers:

IBM

PC

IBM

XT

~

Compaq

Portable3

Compaq

Deskpro3

Compaq

286 Portable

13

Compaq

286 Deskpro1.3

AT&T

63002

Leading Edge1

Sanyo

Notes:

1.

ACB-2070A requires

product

401400

Revision

Corlater.

2.

Requires

AT&T

motherboard

ROMS

version

1.21.

With Revision

1.36,

the

switch

number

3

on

the

switch

block

1

(located

on

the

motherboard

closest

to

the

back

of

the

unit) must

be

in

the

"off"position.

3.

Compaq

format utilityrequires

17

sectors/track

and

thus will

not

function

with

the

ACB-2070A

To

format, use

the

IBM

PC-DOS

or

Microsoft

MS-DOS

format utility

The

Adaptec

ACB-2070A controller

board

has

been

successfully tested with the following drives.

Contact

the

drive vendor listed

to

verify current models

and

revision

levels supporting

2,7

RLL

Vendor Model 2,7

RLL

Capacity*

Seagate

Lapine

MiniScribe

Microscience

Toshiba

Priam

Rodime

Okidata

PTI

(Peripheral

Technology)

Tondon

Syquest

Microstorage

Ricoh

NOTE:

ST-238R

33MB

ST-277R"

65MB

ST-4077R"

68MB

ST-4144

R"

123

MB

Titan

LT300

32MB

3438

31

MB

6128

20MB

8438

31

MB

HH-330

31

MB

HH-738

31

MB

HH-1050"

66MB

MK56FA"

105

MB

V150 62

MB

V170"

90MB

V185"

101

MB

R0201E

16MB

R0202E

31

MB

R0203E

47

MB

R0204E

63MB

R0352

16MB

OD526

31

MB

OD540

50MB

PT325R

31

MB

PT338R

45MB

TM263

31

MB

TM755 62

MB

SQ319R

16MB

MS212R

16MB

RH-5130

16&33

MB

The

ACB-2070A runs drives from 5

MB

to

64

MB

for

DOS

2.0,

2.1,30,3.1

and

MS-DOS

2.11.

•

Contact

drive

vendor

for

exact

revision

of

drive.

Adaptec

will

not

accept

returned

material

of

ACB-2070A's

if

running

on drives

and

revisions

not

on this list

and

approved

by

the

drive vendor.

••These drive

capabilities

format

to

greater

than

64

MB

and

require

a

partitioning

I/O driver

to

get

the

full

capacity

This

driver

is

available

from

Ontrack

Computer

Systems,

(612) 941-4504

or

Chase

Technologies, (201) 894-5544.

2

HARDWARE

AND

SOFTWARE

REQUIREMENTS

The

ACB-2070A

can

be

installed

in

an

IBM

PC/XT

or

equivalent IBM-compatible computer.

The

successful

installation

of

the

Adaptec

ACB-2070A requires the

following hardware

and

software.

Hardware

1.

IBM

PC

or

XT

or equivalent IBM-compatible

computer

with:

a.

One

5

y,;"

floppy

diskette drive

b.

One

available

system expansion slot

c.

Room for

one

5

y,;"

or

3);2"

Winchester (hard) disk drive

2.

5y,;"

or 3);2" Winchester disk drivers) having the

industry-standard

ST506

interface

and

qualified

with

RLL

encoding.

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.

2.

(Optional) A customer-supplied

loadable

device

driver

is

needed

for three to

eight

logical

units orfor

systems

using more than 64

MB

of

total disk

capacity

Available

from Ontrack

Computer

Systems

(612)

941-4504 or

Chase Technology

(201)

894-5544.

BOARD

LAYOUT

The

ACB-2070A

is

shown

in

Figure

1.

This

figure shows the

location

of

the firmware,

BIOS,

jumpers

and

connectors.

Note

that

1

of

the

connector

is

located

closest

to

the

PC

bus

edge

connector.

cO

n:

::'

0.

~

r~

IJ

IJ IJ

u

U~

,::

l'll"J

~

LJ

lJ

IJ

n

"'0

O~l}

oooc

N

Figure

1.

Board

Layout

3

INTEGRATION

INTO

THE

SYSTEM

To

install the

Adaptec

ACB-2070A

board

into your

sys-

tem you must

first

configure the drivels), set the controller

jumpers

and

connect

the drive

cables

properly.

This

section describes all the necessary steps

needed

to

successfully install

this

hardware.

The

controller must

match

the drive parameters,

i.e.,

number

of

Heads, number

of

cylinders, step pulse rate,

etc.

in

orderto function successfully.

The

drive parameters

are

divided

into two categories;

one

being

the drive

changeable

parameters

and

two, the controller

change-

able

parameters.

DRIVE

SELECTION

AND

TERMINATION

The

drive

changeable

parameters are the drive selec-

tion 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.

Before the drives

can

be

cabled

to the controller the

drive

cable

terminator must

be

properly

set.

The

termi-

nator, as

its

name

implies, must

be

at

the

end

of

each

cable

in

orderto have the controller

and

drive communi-

cate

properly.

The

controller has a permanentterminator

built

in.

The

disk drives, since they

can

be

connected

in

a daisy chain configuration have a removable terminator.

This

is

usually a 16-pin

DIP

resistor

package.

The

last phys-

ical drive

in

the chain must have

its

terminator installed.

CONTROLLER

JUMPER

SELECTION

The

controller

changeable

parameters are

defined

as

the variables that

can

be

changed

to

accommodate

the different drive characteristics.These parameters

can

easily

be

changed

by

jumper(s) or

defined

by

the user

for the drive

being

used.

DRIVE

TABLE

SELECTION

JUMPERS

The

ACB-2070A has drive tables for the most commonly

used drives.

These

tables reside

in

the

Adaptec

ACB-

2070A

BIOS

EPROM.

The

drive tables

in

the ACB-2070A

BIOS

supportthe drives

as

defined

in

Table

1.

These drive tables are selected

byjumpers on the board. Other drives

can

be

attached

to the

ACB-

2070A

by

use

of

the user-defined parameters

described

in

the software installation section.

NOTE:

The

ACB-2070A

is

shipped

already

configured

to

be

used

with a

Seagate

ST-238

38

MB

RLL

(25

MB

MFM)

unformatted,

or

equivalent

25

MB

drive. (See

BIOS

Table 0

of

Table

1.)

4

TABLE

1.

ACB-2070A

DEFAULT

DRIVE

TABLES

BIOS BIOS BIOS BIOS

Table 0 Table 1 Table 2 Table 3

Drives

Supported

Seagate

Tandon

Micro-

ST-238

TM

755

science

MiniScribe Vertex HH-330

3438 V150

Formatted

With MFM

20MB

10

MB

40MB

20MB

With

RLL

30MB

15MB

60MB

30MB

Step Pulse 3 3 3 3

Code

(Rate) (

13

Il

S

ec)

(131lSec) (13IlSec)

(13Il

Se

c)

Number

of

4 2 5 4

Data

Heads

Number

of

615

612

981

612

Cylinders

These four

tables

are

selected

by

jumpers M-N.O-P for drive 0

and

Q-R,

S-T

for drive

1.

Table 2

defines

the

jumper

selection

of

each

drive

and

table.

TABLE

2.

JUMPER

SELECTION

OF

DRIVE

TABLES

BIOS

Table for Drive 0 Installed Removed

0

M-N

and

O-P

1

M-N

O-P

2 O-P

M-N

3

M-NandO-P

BIOS

Table for Drive 1 Installed Removed

0

Q-RandS-T

1 Q-R

S-T

2

S-T

Q-R

3

Q-RandS-T

NOTE:

No

need

to

worry

about

these

jumpers

if

format

param-

eters

are

specified

in

primary

format section.

5

TABLE

3.

HIGH-PERFORMANCE

JUMPERS

Jumper

Installed Removed

A-B

Reserved Reserved

C-D

Reserved Reserved

E-F

Drive 0

is

a

Removable

Soft-sectored

Cartridge

Drive.

SQ319R

ST506-type drive.

G-H Drive 1

is

a

Removable

Soft-sectored

Cartridge

Drive,

SQ319R

ST506-type drive.

I-J

Selection

of

JO

and

J1

Selection

of

JO

Reversed

and

J1

as

defined

in next Section.

K-L

Self Diagnostics

DRIVE

AND

CONTROLLER

CABLING

Nowthat the drive

and

controller are configured,they

can

be

connected

together.

The

controller has three

cable

connectors

JO,

J1

and

J2.

The

connector locations

and

pin orientation for

ACB-2070A connectors are shown

in

Figure

1.

NOTE:

When

mounting

in

the

IBM

PCIXT.

1

of

the

connector

and

coble

will

be

facing

down.

The

two

connectors

JO

and

J2,

along

the

outside

edge

of

the

boord,

are

used

when

only

one

drive

is

present. All

three

connectors

JO.

J1

and

J2

are

used

when

two

drives

are

present.

Remember

that

the

lost

physical

drive in

the

chain

must

have

the

termi-

nator

installed.

Mount

the

drive,

controller

and

cables

inside

the

Pc.

6

ACB-2070A

PRIMARV

FORMATIER

At

this

point, the disk must

be

formatted

with a primary

format. Primary formatting

is

not

supported

by

DOS

2.0;

however, it

is

supported

by

the ACB-2070A

BIOS

through

"DEBUG:'

Unlike other controllers, the ACB-2070A needs

no

extra software

to

perform the primaryformatting.

The

primaryformat defines address fields

and

data

fields

on

each

1tack

of

the

disk. After this

is

completed,

bad

blocks

can

be

flagged

and

a directory

created

by

a

DOS

"FORMAT"

command.

The

drive parameters,

i.e.,

answers

to

all questions,

can

be

inputted

by

a

DOS

redirected I/Ofile.

This

will

ease

integration

of

drive

and

controller

in

a manufacturing

environment.

NOTE:

A

customer-supplied

device

driver

is

needed

if

more

than

two

logical

units

are

used

or

more

than

64

MB

of

hard

disk

capacity

is

used.

Adaptec

does

not

supply

such a driver.

To

use the primaryformatter, perform the following steps:

1.

Boot

DOS

2.0 or newer revisions from the

DOS

SUPPLE-

MENTAL

PROGRAMS

diskette.

2.

Type

"DEBUG;'

the

computer

will respond with

0"-".

NOTE:

Underlined

characters

are

user inputs, <RET>

means

return key

and

parentheses

mean

comments.

A>DEBUG <RET>

--

(DEBUG

prompt)

3.

Type the following sequence:

-G = C800:CCC <RET>

•

..

ADAPTEC

ACB-2070A

FORMAT

PROGRAM···

Enter

sector interleave (3 to

9):Q

<RET>

3-to-1

is

the

optimum

interleave

factor

for the

IBM

PC/Xl

Experimentation with different interleave factors

is

the

best

way

of

determining the optimum interleaving

factor

for your

application.

3-to-1

is

the fastest interleave for

2.7

RLL

(7.5

Megabits/second) thatthe

IBM

PC/XT

can

accept.

Enter

Drive

ID

(0/1):Q

or.1 <RET>

7

This

value specifies which physical drive

is

to

be

formatted.

It

follows the hardware switch setting

on

the drives.

Should we use the defaultparameters

(y/N):,!,

or

~

<RET>

The

default

parameters refer

to

the current drive

table

selected

by

the jumpers for that drive

(0

or

1),

see

Tables 1

and

2.

You

have two choices: "Y" for

jumper

default

drive

parameters or

"N"

for user-defined drive parameters.

JUMPER

DEFAULT

DRIVE

PARAMETERS

("V"

RESPONSE)

A "Y" will invoke the

default

drive

table

selection as

defined

by

the jumpers M-N,

O-P,

E-F

for drive 0

and

jumpers Q-R,

S-T,

G-H for drive

1.

This

will skip

to

the

question for

defect

byte offset

encoding.

USER-DEFINED

DRIVE

PARAMETERS

("N"

RESPONSE)

An

"N"

will invoke the user-defined drive parameters

feature

described

below

and

will

ignore the

jumper

default

drive

table

selection.

NOTE:

The

following

parameters

are

for

the

Seagate

ST-238

drive

and

are

shown for

example

only

Insert yourdrive

param-

eters in

place

of

these.

The

Adaptec

ACB-2070A

controller

board

allows you

to

go

from

16

MB

to

64

MB

with

no

special

software.

NOTE:

Enter

all

values in

decimal.

Number

of

logical

units for

this

drive

(1-8):!'{!

<RET>

The

ACB-2070A allows you

to

partition a single physical

drive into

many

equal

logical

units.

The

units

can

be

up

to 32

MB

each

(a restriction

of

DOS

format) having a

maximum

of

eight units for

one

or two physical drives.

In

the

example

for the

ST-238

drive,if

M=2,

the 30

MB

physical drive will

be

divided

into two

equal

logical

units

of

15

MB

each.

Step pulse rate (0

to

7):~

<RET>

The

step pulse rate

is

defined

in

Table

4.

Many

drives

that

are currently

available

will provide high perfor-

mance,

i.e.,

lower

access

times, when used with option

3.

If

a slower nonbuffered step rate drive

is

used, option 0

is

required. Refer

to

the

Disk

Drive

OEM

Manual

for the

fastest

buffered

seek step rate.

8

TABLE

4.

SEEK

STEP

PULSE

RATES

Code

Seek Slep

Pulse

Rale

o

3.0

milliseconds

1 Reserved

2

30

microseconds

3

13

microseconds

4 200 microseconds

5

70

microseconds

6 Reserved

7 Reserved

Number

of

heads

(1

to

16

):~

<RET>

Number

of

cylinders:615 <RET>

For

other disk drives, see the

Disk

Drive

OEM

Manual

for

these values.

In

this

case,the drive has four

data

heads

and

615

cylinders. Minimum value

of

cylinders =

1.

maximum =

1024.

The following prompts

allow

the user

to

specifythe

method

of

entering defects.When entering a

defect

list,

it

may

be

put

in

a separatefile orenteredfrom the keyboard.

Specifythe Defect

Byte

Offset

encoding:

MFM or

RLL

(M/R)?!'{! org<RET>

All drive manufacturers give a

list

of

defective

areas

on the disk.

This

defect

list

gives the location

of

defects

in

one

of

two forms.

One

form

is

cylinder,

head

and

byte

offset.

The

other

is

head,

cylinder

and

byte offset. Normally

the byte offset

is

given

in

MFM

encoding.

Many

drive

vendors are also giving the byte offset

in

RLL

encoding.

Either

MFM

or

RLL

encoding

can

be

used.

If

MFM

is

used,

the controller multiplies

by

1.5

to

determine

the

RLL

equivalent defect.

If

no

defect

list

is

available,press 'M'then 'C'

and

two

<RET>'s.

The

controller will

flag

defects that it finds during

trackverification

in

data

and

ID

fields.

This

does

not

guarantee

thatall defectswill

be

detected

and

mapped.

Drive manufacturers

do

more

rigorous

analog

and

temperature

testing

to

create

their

defect

lists.

Enter

defect

list

as "Cyl/Head/Byte" or "Head/Cyl/Byte"

(C or

H):

g

or!::!

<RET>

Type

defect

file

name

or press

Enter:

Enter

the

defect

list

in

the format selected

above,

i.e

..

cyl/head/byte

or

head/cyl/byte.

The

cylinder,

head

and

byte offset are

separated

by

"I" marks.

For

example,

31/2/4054meanscylinder

31.

head

2

and

4054bytesoffset.

9

The

defect

list

may

reside in a

DOS

file or

be

inputted

from the keyboard.

If

a

DOS

file

is

used.enter

its

name

here.

The

DOS

file

is

ended

by

a

carriage

return as shown

below.

The

file

name

must

have

an

extension (e.g.,

DRIVEDEF).

If

entering from

the

keyboard, press <RET>

and

the

following will

be

shown:

Enter

defect

locations as Cyi/Head/Byte

(or Head/Cyl/Byte)

(a

blank

line will

end

the

list):

For

example:

31/2/4054 <RET>

257/4/2253 <RET>

541/3/3415 <RET>

Are the

above

parameters correct

(V

/N)? 'ior

t:!.

An 'N' will return

to

the

beginning

of

the format pro-

gram.When

'Y'

is

selected,the following will

be

shown:

Formatting Drive...

The

drive

is

now

being

formatted.When finished. the

track verification begins,

this

takes approximately40 sec-

onds

per

Megabyte.

The

track verification takes longer than most controllers.

The

reason for this

is

that

an

extensive

check

is

being

made

using worst

case

data

patterns.

During track verification the following will

be

shown:

Verifying Format

in

Logical Unit 0...

Cylinder

XXXX

Verifying Format in Logical Unit X

...

Cylinder

XXXX

Format

Completed

..

Run

this

program

again

(V

/N)? 'ior

t:!.

Nowthe primaryformat

is

complete.

If

needed,

rerun

the format for drive

1.

When finished answer 'N'

to

return

to the

DOS>

A

prompt

and

continue.

10

If

defects

occur

during

format

the following text will

appear

on

the screen:

Mapping

Defects...

Reformatting Track-Cylinder

XXXX,

Head

XX,

Sector

XX

(When 26 sectors are used)

Formatting

ALT

Track-Cylinder

611.

Head

3

(When alternate track

is

assigned)

NOTE:

Alternate

tracks

have

reduced

the

total

drive

capacity.

Verifying Format in Logical Unit X...

• Verify Error-Logical Unit

X,

Cylinder

XXXX,

Head

XX,

Sector

XX

Controller

Error

Code:

91.

BIOS

Error

Code:

10

Reformatting Track

The

cylinder

number

is

the

physical,

not

the

logical,

cylinder

number

of

the drive.

BIOS

error

codes

are

found

in

Table

5.

TABLE

5.

BIOS

ERROR

CODES

Code

01

02

04

05

07

09

,OB

10

11

20

40

80

BB

FF

Error

Bad

Command

Passed

to

Disk

I/O

Address Mark Not Found

Requested Sector NotFound

Reset Failed

Drive Parameter Activity Failed

Attempt

to

DMA Across 64K Boundary

Bad Track Flag

Detected

Bad

ECC

on

Disk

Read

ECC

Corrected

Data

Error

Controller Failure

Seek Operation Failed

Attached/Failed

to

Respond

Undefined

Error

Occurred

Sense Operation Failed

11

PARTITION

AND

FORMAT

DESCRIPTION

Logical drive C

is

always the

first

logical

unit

on

drive

O.

Logical drive

D:

is

the

second

logical

unit, which

could

be

on drive

0,

if large disk partitioning

is

used.

The

disk must now

be

partitioned for

DOS

2.0

and

the

format verified.

1.

Insert a

copy

of

DOS

2.0

that contains

"FDISK"

and

"FORMAT"

in

floppy

drive

A.

2.

Type

FDISK

and

Select option

1:

Create a

DOS

partition

(See

Chapter

4

of

DOS

Manual).

If

needed,

repeat

FDISK

for drive Dusing option

5.

3.

When complete,

type

FORMAT

CIS.

If

needed,

repeat

for drive

D,

using

FORMAT

D:.

This

will

create

a

DOS

directory,verify the primary format

and

flag

any

bad

(defective) sectors. Since the

Adaptec

defect

handling

scheme

was used,there will

be

no

bad

sectors.

From

this

pointon,you

can

boot

from the hard

disk,

copy

files

and

operate

your software applications.

You

are

up

and

running!

ADAPTEC

ABC-2070A

TROUBLESHOOTING

CHECKLIST

D Probable problems:

1701

error; power-on failure; pri-

mary

format failures,

DOS

failures.

D

Check

jumpers

on

the disk drive,

be

sure that it

is

not

set for a radial-selected drive.

D

Check

jumpers

on

controller, especiallyjumpers

E-F,

and

G-H.

Be

sure

jumper

K-L

is

removed.

D

Check

cables,

be

sure

JO

goes

to

drive

0,

J1

goes

to

drive

1.

and

J2

goes

to

both drives.

Be

sure

that pin 1

on the controller

is

connected

to

pin 1

of

the drive.

If

only

one

drive

is

being

used,

connect

the

cables

to the

connectors

along

the

edge

of

the board.

Check

that

jumper

I-J

is

removed.

D

Check

thatthe terminator

on

the drive

is

properly

set.

D

Check

thatthe power supply

can

support

the

added

current required

by

the drive.

Be

sure

the

+5V

and

+12V voltages are correct.Verify their requirements

with the drive vendor.

D

If

using the user-defined drive values (not the four

BIOS

tables),

be

sure

thatthe values are entered correctly.

D Refer to the

list

of

2,7

RLL

drives

and

systems

supported

for compatibility.

12

If

you require further information

or

othertechnical sup-

port, please

contact

your dealer:

LIBRARY

copy

F.C.C.

CERTIFICATION

This

eqUipment

generates

and

uses

radio

frequency

and

it

not

installed

and

used

prop-

erty,

that

is.

in

strict acCOfdance with the manufacfurer's

instructions,

rnav cause interference

to

radio

and

television

reception.

It has

been

type

tested

and

found

to

comply

with

the

limits for a Class B

computing

device

in

accordance

with

the

specifications

in

Subpart

J

or

Port 15

of

FCC

Rules, which

are

designed to provide

reasonable

protection against

such

interference

in a residential installation.However, there

is

no

guarantee

that

inter-

ference

will

not

occur

in a

particular

installation.If this

equipment

does

cause

interference

to

radio

or

television

reception,

which

can

be

determined

by

turning

the

equipment

off

and

on,

the

user

is

encouraged

to

try to

correct

the

interference

by

one

or

more

01

the

following measures.

Reorient

receiving

antenna.

Relocate

the

computer

with

respect

to

the

receiver.

Move

the

computer

away

from the receiver.

Plug

the

computer

into a different

outlet

so

that

computer

and

receiver

are

on

different

branch

circuits.

If necessary,

the

usershould consult

the

dealer

or

an

experienced

radio/television

tech-

nician

for

additional

suggestions.The user

may

find the following

booklet

p!'epared

by

the

Federal

Communications

Commission helpful.

"How

to

Identify

ond

Resolve Radio-TV

Interference

Problems."This

booklet

is

available

from

the

U.S.

Government

Printing

Office,

Washington, DC 20402, Stock

No.

004-000-00345-4.

COPYRIGHT

Copyright

1986

by

Adoptee.

No

part

at this

publication

may

be

reproduced,

stored in a retrieval system,

or

transmitted, In

any

form

or

by

any

means,

electronic,

mechanical,

photOCOpying,

recording,

or

otherwise,

without

the

prior

written

consent

of

Adaptec,

Inc., 580

Cottonwood

Drive, Milpitas,

California

95035.

TRADEMARKS

The

trademarks

referred to in this

manual

ore

identified

and

acknowledged

as follows;

IBM

and

Xl

are

registered

trademarks

of

International

BUSiness

Machines

Corporation.

WARRANTY

Adaptec,

Inc.

products

are

warranted

against

defects

In

material

and

workmanship

for

a

period

of

one

yeor. •

CHANGES

The

material

in this

guide

is

for information only

and

is

subject

to

change

without notice.

Adoptee

reserves

the

right

to

make

changes

in

the

product

design

without reservation

and

without

notification

to

its

users.

Copyright

1986.

Adoptee,

Inc" Milpitas, California 405150-00;MBD 1/87

~.-----------

....

~~.

~~------------------------------------~*

•

DM!

IRQ

I/O

PORTS

BIOS

ADDRESS

mUG

G:C800:CCC

3

5

320

-

323

C8000

-

C9HF

(ST238)

Interleave

..............

3

Drive

10

................

0

Defaul

t

Parameters

......

K

No.

of

Logical

Units

....

1

Step

Rate

...............

3

Heads

...................

4

Cy

linders

.........

" ..

615

Defect

Byte

.............

R

Cyl/Hd/Byte

.............

C

HIGH-PERFORMANCE

JUMPERS

Jumper Installed Removed

A·B

Reserved Reserved

CD

Reserved Reserved

E·F

Drive 0

is

a Removable Soft·sectored

Cartridge Drive.

SQJ19R

ST506-lype drive.

G·H Drive 1

is

a Remo..able Sofl·sectored

Cartridge Drive.

SQJ19R

ST506·type drive.

t-J

Selection

of

JO

and

J1

Selection of

JO

Reversed

and

J1

as

defined

in next

Sec

lion.

K·L

Self

Diagnoshcs

~Hl

PERFORMANCE

JUMPERS

ACB-2070A

BIOS

o

LED

MOQS

N P R T

?

AIC-270

A1C16000

A1CJOO

A1C010

FIRMNME

?

BOBS

? 8156

KIGECA

1

LJHFDB

J1

'1

34

SOCKET

PtN

1

I J2 .\ !

.JO

1

V-4

ACB-2070A

DEFAULT

DRIVE

TABLES

BIOS

8105

Table 0 Table 1 Table 2 Table 3

Drives

Supported Seagate

ST·238

MiniScribe

3438

Tandon Mlcro-

TM

755

scienCE

Verlex HH·330

V150

Formatted

WilhMFM 20MB 10MB 40MB

20MB

With

RLL

30MB 15MB

60MB

30

MB

Step

Pulse

3 3 3 3

Code

(Rate) (13I'Sec) (1JI'Sec) (13I'Sec) (13l'Sec

Number of 4 2 5 4

Data Heads

Number of

615

612

981

612

Cytinders

}

DRM

TABLE

SELECnON

JUMPERS

These

four tables are selected

by

jumpers M·N.

O·p

for drive 0

and

Q.R.

S·T

for

drive

1.

Table 2 defines the jumper selection

of

each

drive

and

table.

TABLE

2.

JUMPER

SELECTION

OF

DRIVE

TABLES

BIOS

Table lor Drive 0 Installed Removed

0

M·NondO·P

1

M·N

O·p

2 O-P M·N

3 M·N

andO-F

8105

Table

for

Drive 1 Installed Removed

0 Q·R

and

S·T

1 Q·R

S·T

2

S·T

Q-R

3

Q·Rand

S-T

NOTE:

No

need

to worry

about

these

jumpers"

format

param-

eters

are

specified

in

pnmory

format

section.

20

SOCKETS

SEEK

STEP

PULSE

RATES

Code

Seek Step

Pulse

Rate

o

3.0

milliseconds

1 Reserved

2

30

microseconds

3

13

microseconds

4 200 microseconds

5

70

microseconds

6 Reserved

7 Reserved

Adaptec ACB-2070A User manual

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