Adaptec Apa-358a User manual

APA-358A MiniSCSI-2 Installation Guide

Part Number: 510809-00, Rev. A

Print Spec Number: 493477-00

Current Date: 4/11/95 ECN Date: 4/1195

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Installation Guide

APA-358A MiniSCSI-2

Enhanced Parallel-to-SCSI Host Adapter

With High-Density SCSI-2 Connector

APA-358A MiniSCSI-2 Installation Guide

Part Number: 510809-00, Rev. A

Print Spec Number: 493477-00

Current Date: 4/11/95 ECN Date: 4/1195

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Getting Started

This guide explains how to install the APA-358A

MiniSCSI™-2 host adapter. The MiniSCSI-2 lets you

operate your SCSI devices through your computer’s

parallel port, while still using the port for your

printer. You can use the MiniSCSI-2 with an

enhanced parallel port (EPP), an extended capabilities

port that is EPP compliant (ECP/EPP), or a conven-

tional parallel port.

Installation involves

■Connecting your MiniSCSI-2 and SCSI devices to

your computer

■Installing Adaptec EZ-SCSI™, the software needed

to support the MiniSCSI-2 and SCSI devices

Begin by reviewing the following checklist and hard-

ware requirements. Then read the remaining sections

in the order presented. If you have problems during

installation, see Troubleshooting on page 8.

Checklist

Your MiniSCSI-2 package should contain the follow-

ing items:

■APA-358A MiniSCSI-2 host adapter

■APA-358A MiniSCSI-2 Installation Guide

■Adaptec EZ-SCSI diskettes and user’s guide

■Registration cards (one each) for the MiniSCSI-2

and for Microsoft MSCDEX

If anything is missing, please contact your dealer.

Hardware Requirements

The MiniSCSI-2 is designed to be as universally

usable as possible, but your computer and SCSI

devices must meet a few requirements:

■The computer must be an IBM or compatible AT

or PS/2 computer with a 100% IBM-compatible

BIOS. Operation with an incompatible BIOS may

be possible but is not guaranteed.

■The computer’s parallel port must be standard—

that is, have a fully IBM-compatible hardware

design. For highest performance, the parallel port

must be EPP compliant.

APA-358A MiniSCSI-2 Installation Guide

Part Number: 510809-00, Rev. A

Print Spec Number: 493477-00

Current Date: 4/11/95 ECN Date: 4/1195

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Understanding the MiniSCSI-2

Before you install the MiniSCSI-2, read this section to

learn about MiniSCSI-2 features, components, and

SCSI settings. You will need this information when

you install the MiniSCSI-2.

General Features

The MiniSCSI-2 lets you connect up to seven external

SCSI devices to your computer’s parallel port. You can

connect almost anytype of SCSIdevice, including hard

disk drives, CD-ROM drives, removable-media drives,

and scanners. (For a list of supported devices, see

Adaptec EZ-SCSI User’s Guide.) Your printer and the

SCSI devices can operate simultaneously from the

same parallel port, with no performance degradation.

The MiniSCSI-2 is fully compatible with EPP-

compliant ports. It is also backward compatible with

the non-EPP unidirectional and bidirectional parallel

ports found on many computer systems. There is no

need to specify whether the parallel port is EPP com-

pliant—faster EPP transmission rates are automatic.

When not running in EPP mode, the port runs at stan-

dard parallel port (SPP) rates.

Note: Conventional parallel ports have data

transfer rates of 50 to 260 KBytes/sec. EPP-

compliant ports reach up to 1 MByte/sec.

Adaptec EZ-SCSI automatically configures

the MiniSCSI-2 to the fastest speed possible.

Components

The MiniSCSI-2 has the following major compo-

nents, illustrated in the figure that follows this list:

■A 25-pin parallel port connector, which plugs into

the parallel port on your computer

■A 50-pin high-density SCSI-2 connector, which

connects the MiniSCSI-2 to the SCSI devices

■A printer passthrough connector, which connects

your printer to your computer through the

MiniSCSI-2, allowing the printer and SCSI devices

to use the parallel port simultaneously

APA-358A MiniSCSI-2 Installation Guide

Part Number: 510809-00, Rev. A

Print Spec Number: 493477-00

Current Date: 4/11/95 ECN Date: 4/1195

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■An LED light, which indicates whether a SCSI

device is supplying termination power (see Ter-

mination Power on page 4).

Settings

The MiniSCSI-2 has the following factory-set SCSI ID

and SCSI termination:

■SCSI ID: 7

■SCSI termination: Always enabled

SCSI ID

SCSI devices connect to each other in one continuous

line called the SCSI bus. To prevent communication

conflicts, each device on the SCSI bus must have a

unique SCSI ID. Allowable IDs are 0 through 7. If

two devices attempt to access the SCSI bus simulta-

neously, the SCSI ID also determines which device

has priority: The device with the higher ID has the

higher priority. The ID for the MiniSCSI-2 is fixed at

7, giving it the highest priority on the SCSI bus.

SCSI Termination

For the SCSI bus to operate properly, the SCSI devices

at both ends of the bus must be electrically terminated.

This is accomplished by installing or enabling resistors,

called terminators, on the end devices. Because the

MiniSCSI-2 is always at one end of the SCSI bus, the

terminator on the MiniSCSI-2 is enabled.

LED

Printer

Passthrough

Connector

Jack 

for AC

Adapter

Parallel Port

Connector

SCSI Connector

APA-358A MiniSCSI-2 Installation Guide

Part Number: 510809-00, Rev. A

Print Spec Number: 493477-00

Current Date: 4/11/95 ECN Date: 4/1195

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The device at the other end of the SCSI bus will be an

external SCSI device, such as an external hard disk

drive. External SCSI devices are normally terminated

by installing a terminator in the unused SCSI con-

nector on the SCSI device (see the figure on page 5

for an example) or by setting jumpers or switches.

See your device documentation for details.

Termination Power

The SCSI bus must have termination power, a specific

voltage (5 volts) required by the terminators. Termi-

nation power may be available from one of the SCSI

devices attached to the MiniSCSI-2. To determine

whether a device provides termination power, check

the device documentation. You can also determine

this by connecting the device to the MiniSCSI-2, as

described in the next section, and checking the LED

on the MiniSCSI-2. If the LED lights after you turn on

the SCSI device, the device is providing termination

power (see step 10 on page 6).

The SCSI device that provides termination power

may be anywhere on the SCSI bus. Also, more than

one device can provide termination power—this

does not cause problems on the SCSI bus.

If none of the SCSI devices provides termination

power, you must obtain an AC adapter. You can

order the AC adapter from Adaptec at 800-442-7274.

Installing the MiniSCSI-2

Installing the MiniSCSI-2 involves plugging the

MiniSCSI-2 into the parallel port, then connecting the

MiniSCSI-2 to your SCSI devices and printer. Follow

the steps in this section, referring to the figure on

page 3 for connector locations.

WARNING: Turn OFF the computer, printer,

and SCSI devices when connecting or dis-

connecting the MiniSCSI-2.

1Disconnect anything connected to the parallel

port you intend to use for the MiniSCSI-2. You

may use either LPT1, LPT2, or LPT3—the

APA-358A MiniSCSI-2 Installation Guide

Part Number: 510809-00, Rev. A

Print Spec Number: 493477-00

Current Date: 4/11/95 ECN Date: 4/1195

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MiniSCSI-2 driver automatically detects which

port is used.

Note: If you use a copy-protection device

(commonly known as a dongle) on the paral-

lel port, connect it to the printer passthrough

connector on the MiniSCSI-2. If this arrange-

ment causes problems, relocate either the

dongle or the MiniSCSI-2 to a different paral-

lel port.

2Plug the MiniSCSI-2 parallel port connector into

the parallel port.

3Plug the SCSI connector on the MiniSCSI-2 into

the first SCSI device.

Caution: The MiniSCSI-2 supports only sin-

gle-ended SCSI devices. Do not connect differ-

ential SCSI devices to it (to determine the

device type, contact your vendor or see your

device documentation).

4Connect up to six other SCSI devices by daisy

chaining one device to the next, with no branching

(see the following figure).

5Make sure that each SCSI device has a unique

SCSI ID from 0 to 6. For instructions on changing

the ID for a device, see the device documentation.

External

SCSI Cables

Terminator

APA-358A MiniSCSI-2 Installation Guide

Part Number: 510809-00, Rev. A

Print Spec Number: 493477-00

Current Date: 4/11/95 ECN Date: 4/1195

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6Terminate the last SCSI device attached to the

MiniSCSI-2,referring to the device documentation

for instructions.

7Disable termination on all other SCSI devices

attached to the MiniSCSI-2, referring to the device

documentation for instructions.

8To use a parallel printer with the MiniSCSI-2, con-

nect a standard parallel printer cable to the

MiniSCSI-2 printer passthrough connector (see

the following figure). No special configuration or

switching is needed.

9Check that the SCSI cables are still connected

securely. They may have loosened if you changed

jumper or switch settings on the devices.

10 Turn on the SCSI devices, then turn on the com-

puter. Check the LED on the MiniSCSI-2. If the LED

does not light, you do not have SCSI termination

power. In this case, you must obtain an AC adapter

(see Termination Power on page 4).

Caution: If termination power is supplied by

a SCSI device, do not disconnect the SCSI

device while the computer is on. If you do,

all SCSI devices and any printer connected

to the MiniSCSI-2 stop working. The

MiniSCSI-2 will not recognize the SCSI

devices until you reconnect and turn ON the

SCSI device and then reboot your computer.

Printer Cable

Printer

Passthrough

Connector

APA-358A MiniSCSI-2 Installation Guide

Part Number: 510809-00, Rev. A

Print Spec Number: 493477-00

Current Date: 4/11/95 ECN Date: 4/1195

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Installing Adaptec EZ-SCSI

To complete installation, install the Adaptec EZ-SCSI

software that accompanied the MiniSCSI-2. To do so,

follow the instructions in Adaptec EZ-SCSI User’s Guide.

The Adaptec EZ-SCSI Software

Adaptec EZ-SCSI provides the ASPI manager and

the device drivers the MiniSCSI-2 needs to operate

under DOS and Windows. The following table lists

the main Adaptec EZ-SCSI software used with the

MiniSCSI-2. For details, see Adaptec EZ-SCSI User’s

Guide.

When you install Adaptec EZ-SCSI, it automatically

adds command lines to your

config.sys

file to load the

ASPI manager and the appropriate drivers for your

SCSI devices. It also modifies your

autoexec.bat

file to

include a command line for

mscdex.exe

ma358.sys Options

The command line for the ASPI manager,

ma358.sys

includes the following command options. You can

change these options by editing the command line in

the

config.sys

file (use a text editor program).

Note: The options described here supersede

those described in Appendix C of Adaptec

EZ-SCSI User’s Guide.

Software Description

ma358.sys The ASPI manager, which lets the device drivers

communicate with theMiniSCSI-2.

aspidisk.sys A device driver for SCSI disk devices, including

hard disk drives, Floptical drives, removable-media

drives, and disk drives larger than 1 GByte.

aspicd.sys A device driver for CD-ROM drives.

mscdex.exe The Microsoft CD-ROM extensions for DOS, which

are necessary torun CD-ROM drives.

sjiix.sys A device driver for Hewlett-Packard scanners.

/pause Makes your system pause after loading

ma358.sys

at boot time, so you can read

the messages on the screen. After you read

them, press any key to resume booting.

APA-358A MiniSCSI-2 Installation Guide

Part Number: 510809-00, Rev. A

Print Spec Number: 493477-00

Current Date: 4/11/95 ECN Date: 4/1195

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If you change the

ma358.sys

options in the

config.sys

file, turn the computer OFF and then ON

again to have the changes take effect. (Do not simply

reboot the computer using Ctrl-Alt-Del.)

Troubleshooting

If you have a problem during installation, first check

the items below. If you do not find the solution here,

read the remainder of this section. You should also

check the Troubleshooting section in Adaptec EZ-SCSI

User’s Guide.

■Make sure all cables are properly connected.

■Make sure the LED on the MiniSCSI-2 lights

when you turn ON the SCSI devices. If the LED on

the MiniSCSI-2 does not light, you do not have

Determines the mode configuration and

the amount of time that the MiniSCSI-2

read and write cycles are delayed (parallel

ports on some computers require delays).

You must specify values for both

and

The

specifies the amount of delay. Allow-

able values for

are 0 through 7, with each

number representing a 125-nanosecond

(ns) increment. A value of 7, for example,

adds an 875 ns (7 x 125) delay to the cycles.

The default of 0 specifies no delays.

The

parameter determines the mode.

The allowable values are shown in the

following table.

Value of m Meaning

0 Auto-detect mode (the default). Automatically

detects the type of port andconfigures the

MiniSCSI-2for that port type.

2 Forces unidirectional mode.

4 Forces bidirectional mode.

8 Assumes EPP 8-bit bidirectional mode. For this

to work, the parallel port must be set for EPP

mode in the CMOS setup program. For instruc-

tions on using the CMOS setup program, see

your motherboard documentation.

APA-358A MiniSCSI-2 Installation Guide

Part Number: 510809-00, Rev. A

Print Spec Number: 493477-00

Current Date: 4/11/95 ECN Date: 4/1195

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termination power and may need to obtain an AC

adapter (see Termination Power on page 4).

■Make sure the SCSI bus is properly terminated.

■Make sure all SCSI devices have unique SCSI IDs.

■Make sure you are not trying to boot from a

device on the MiniSCSI-2. (A computer cannot

boot from a device connected to the parallel port.)

■Make surethe parallel port address is 278h or 378h.

If it is 3BCh, the parallel port cannot be used in

EPP mode. In this case, change the port address to

278h or 378h, or change the /M

(mode configu-

ration) option for

ma358.sys

to a non-EPP mode

(see ma358.sys Options on page 7).

Error Messages

The Adaptec EZ-SCSI drivers and ASPI manager dis-

play error messages if they detect a problem when

the computer boots. For information on most error

messages, see Adaptec EZ-SCSI User’s Guide. The fol-

lowing messages are not described in that user’s

guide.

No SCSI Host Adapter detected

The MiniSCSI-2 requires SCSI termination power to

operate. Turn ON the SCSI devices. If the LED on the

MiniSCSI-2 does not light, you do not have termina-

tion power. You may need to obtain an AC adapter

(see Termination Power on page 4).

Host Adapter detected. Warning: No devices respond on

this host adapter

If you receive this message, the mode setting for

ma358.sys

is probably incorrect:

■If you are using a mode other than Auto-detect,

try using Auto-detect (/M

, where

=0). This

should automatically configure the MiniSCSI-2 for

your parallel port type. To change to Auto-detect

mode, see ma358.sys Options on page 7.

■If you are using Auto-detect mode (

=0), the

Auto-detect feature may not have properly

detected the port type. Try turning the computer

OFF and then ON again. If you still receive the

error message, try setting

to 2 or 4 (see

ma358.sys Options on page 7).

APA-358A MiniSCSI-2 Installation Guide

Part Number: 510809-00, Rev. A

Print Spec Number: 493477-00

Current Date: 4/11/95 ECN Date: 4/1195

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■If

is 8 (which tells

ma358.sys

to assume EPP

mode), the parallel port may not be EPP compli-

ant. Check your computer documentation or con-

tact your vendor to determine if the port is EPP

compliant. If it is not EPP compliant, change

0, 2, or 4 (see ma358.sys Options on page 7).

If the port is EPP compliant, you probably need to

configure it as an EPP port in the CMOS setup

program or else load a driver supplied by the man-

ufacturer (see the manufacturer’s instructions for

the proper procedure). If you need to load a

driver, load it before you load

ma358.sys

(you can

edit your

config.sys

file to include the load line

for the driver before the load line for

ma358.sys

Problems on Network Installations

If your computer is part of a network installation,

your printer port may be redirected to a network

printer. For instance, Novell NetWare software uses

the capture command for this purpose. If this is the

case, the software will not detect the hardware at

bootup. The simplest solution is to change your com-

puter’s parallel port hardware to LPT2 or LPT3, or

change your network redirection to a different port.

The MiniSCSI-2 Still Does Not Function

Try changing the mode configuration option in the

config.sys

file:

1In the command line for

ma358.sys

in your

config.sys

file, change /M

so the value of

is 1.

For example, the line should look similar to

device=[path]ma358.sys /M1

Note: For EPP ports that are not configured

automatically by Adaptec EZ-SCSI, place the

port in EPP mode (follow the manufacturer’s

instructions), leave

at 0 and set

to 8

(/M08) to force EPP mode, then follow the

tests in

through

. If you discover prob-

lems, modify the

value as explained in

steps 1 through 3.

APA-358A MiniSCSI-2 Installation Guide

Part Number: 510809-00, Rev. A

Print Spec Number: 493477-00

Current Date: 4/11/95 ECN Date: 4/1195

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After setting the option, perform the tests below

to ensure the adapter is functioning properly:

aPerform a dir command on a hard disk drive

and/or a CD-ROM drive. Check for problems,

such as absurdly wrong numbers or corrupted

file names being reported.

bTry copying a large file (greater than 100 KBytes,

if possible) from the SCSI device to a

non-SCSI hard disk or floppy drive. Then use

the DOS comp command to compare the new

copy to the original file. Check for problems,

such as the file comparison failing.

cCopy a large file from your non-SCSI drive to

a SCSI rewritable device. Again, compare the

two files with the comp command. Check for

problems, such as the file comparison failing.

2If your MiniSCSI-2 still does not function prop-

erly, repeat step 1 with other

values (2 through 7)

until the adapter works. The idea is to optimize per-

formance by selecting the lowest

value that works

with your parallel port; typically the value of 2

works with most parallel ports with this problem.

Caution: If the MiniSCSI-2 still does not

work, it may not be compatible with your

parallel port. Contact Adaptec technical

support.

3If you share the MiniSCSI-2 with other systems,

set up each system individually for proper perfor-

mance with the MiniSCSI-2. Be sure to follow the

instructions in steps 1 and 2.

APA-358A MiniSCSI-2 Installation Guide

Part Number: 510809-00, Rev. A

Print Spec Number: 493477-00

Current Date: 4/11/95 ECN Date: 4/1195

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Adaptec Customer Support Services

If you have questions about installing or using the

host adapter, check this install guide first—you will

find answers to most of your questions here. If you

need further assistance, please contact us. We offer

the following support and information services:

■For technical support (answers to technical questions, informa-

tion about the Adaptec BBS, FTP and WWW Servers, and

access to the Interactive Fax system), call 800-959-SCSI (7274)

or 408-945-2550, 24 hours a day, 7 days a week. To speak with a

product support representative, call 408-934-SCSI (7274), M–F:

6:00 a.m. to 5:00 p.m., Pacific Time.

■For sales information, call 800-959-SCSI (7274) or 408-945-2550,

M–F: 6:00 a.m. to 5:00 p.m., Pacific Time.

■The Adaptec Electronic Bulletin Board Service (BBS) provides

information on software upgrades, answers to common ques-

tions, and other topics. The BBS is available 24 hours a day, 7

days a week, at 408-945-7727; 1200/2400/9600/14,400/28,800

baud, 8 data bits, 1 stop bit, no parity.

■The Adaptec FTP and WWW Servers and CompuServe pro-

vide information on software upgrades, product literature,

answers to common questions, and other topics. The FTP and

WWW Servers are available from the Internet 24 hours a day, 7

days a week, at ftp.adaptec.com and http://www.adaptec.com.

On CompuServe, type go adaptec.

■The Adaptec Interactive Fax system provides answers to com-

mon questions, product literature, and current information

about Adaptec products and services. The Adaptec Interactive

Fax system is available 23 hours a day, 7 days a week. The Fax

system is out of service 1 hour each day. You can call this ser-

vice directly at 408-957-7150.

■To order Adaptec software and SCSI cables, call 800-442-SCSI

(7274) or 408-957-SCSI (7274), M–F: 6:00 a.m. to 5:00 p.m.,

Pacific Time.

■To request additional documentation for Adaptec products,

call 800-934-2766 or 510-732-3829, M–F: 6:00 a.m. to 5:00 p.m.,

Pacific Time.

APA-358A MiniSCSI-2 Installation Guide

Part Number: 510809-00, Rev. A

Print Spec Number: 493477-00

Current Date: 4/11/95 ECN Date: 4/1195

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FCC Compliance Statement

NOTE: This equipment has been testedand found to comply with the limits

for a Class B digital device, pursuant to Part 15 of the FCC rules. These lim-

its are designed to provide reasonable protection against harmful interfer-

ence in residential installations. This equipment generates, uses, and can

radiate radio frequency energy, and if not installed and used in accordance

with the instructions, may cause harmful interference to radio communica-

tions. However, there is no guarantee that interference will not occur in a

particular installation.

If this equipment does cause interference to radio or television equipment

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 of the

following measures:

• Reorient or relocate the receiving antenna

• Move the equipment away from the receiver

• Plug the equipment into an outlet on a circuit different from that to

which the receiver is powered

• If necessary, the user should consult the dealer or an experienced radio/

television technician for additional suggestions

CAUTION: Only equipment certified to comply with Class B (computer

input/output devices, terminals, printers, etc.) should be attached to this

equipment, and must have shielded interface cables.

Finally, any changes or modifications to the equipment by the user not

expressly approved by the grantee or manufacturer could void the user’s

authority to operate such equipment.

Each host adapter is equipped with an FCC compliance label that shows

only the FCC identification number. The full text of the associated label

follows:

This device complies with part 15 of the FCC rules. Operation is subject to

the following two conditions: (1) this device may not cause harmful interfer-

ence and (2) this device must accept any interference received, including

interference that may cause undesired operation.

EuropeanCommunity Mark

This adapter meets CE mark requirements.

Adaptec, Inc.

691 South Milpitas Blvd.

Milpitas, CA 95035

Adaptec logo, and EZ-SCSI are trademarks of Adaptec, Inc.,

which may be registered in some jurisdictions. MiniSCSI is a

trademark of Trantor Systems Limited, an Adaptec company. All

other trademarks are owned by their respective owners.

Printed in Singapore

Stock No.: 510809-00, Rev. A JK 4/95

Information subject to change without notice.

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